17, 1945 2,414,385 Milas Jan. 14, 1947 2,500,599 Bergsteinsson Mar. The sodium tungstate that is obtained from this is transformed into APT (ammonium paratungstate) using a so-called ion exchange extraction process. Product generated from the wet cleaning of off-gases from the zinc/lead blast furnace. Specific examples of compounds which can be thus epoxidized successfully include the following non-conjugated ethylenic compounds containing not more than two ethylenic groups and having at least one carbon atom between any two such ethylenic groups: the olefinic hydrocarbons such as 2- butene, isobutylene, the amylenes, 2-octene, 3-decene, dodecenes from propylene polymerization, cyclopentene, cyclohexene, 4-methyl, cyclohexene, and the like; ethylenic ethers of the foregoing ethylenic alcohols which may be the simple ethers or mixed ethers with either saturated or unsaturated alcohols, as well as vinyl ethers, for example, methyl vinyl ether, allyl vinyl ether, isopropyl isopropenyl ether, isocrotyl butyl ether, methyl cyclohexenyl ether, ethyl oleyl ether, methallyl cinnamyl ether, etc. For use in staining endocrine tissue, dilute this test solution with an equal volume of water. High-entropy ceramics with five or more cations have recently attracted significant attention due to their superior properties for various structural 77588. Principally lead chloride with salts and compounds of various metals. BPR regulation aims to improve the functioning of the biocidal products market in the EU, while ensuring a high level of protection for humans and the environment. Estimation of protein concentration in laboratory. Il s'oxyde trs peu la temprature ambiante et chauff, il brle avec une flamme orange dans l'air en donnant une fume brune toxique, qui apparat tre de l'oxyde anhydre jaune brun CdO, insoluble dans un excs d'hydroxyde de sodium. Dr. Abhay Khandagle Example IX Hydration of the product containing 0.055 equivalent of glycerol and 0.103 equivalent of glycidol per 100 grams made by batch reaction of allyl alcohol with hydrogen peroxide using about 0.5% sodium acid tungstate as catalyst at a pH of 5.5 was carried out by refluxing at 100 C. At 3 /2 to 4 hours reaction time a yield of 93.2% additional glycerol based on the glycidol originally present was obtained. with calcium oxide, strontium oxide and tungsten oxide (WO3), lead-doped, Silicic acid (H4SiO4), magnesium manganese(2+) zinc salt, arsenic and lead-doped, 2',4',5',7'-Tetrabromofluorescein lead salt, Barium bismuth lead niobium titanium oxide, Leach residues, zinc ore-calcine, zinc cobalt, Lead, C4-10-fatty acid octanoate complexes, Lead, bis[bis(2-methylpropyl)carbamodithioato-S,S']-, (T-4)-, 2-hydroxypropane-1,2,3-tricarboxylate;lead(2+);trihydrate, Lead, bis(dipropylcarbamodithioato-S,S')-, (T-4)-, Phosphorodithioic acid, mixed O,O-bis(Bu and pentyl) esters, lead(2+) salt, Lead, C8-10-branched fatty acids C9-11-neofatty acids naphthenate complexes, overbased, Lead, isooctanoate neodecanoate complexes, basic, Plumbate(1-), [N,N-bis(carboxymethyl)glycinato(3-)-N,O,O',O'']-, sodium, (T-4)-, Lead, isononanoate naphthenate complexes, basic, Lead, 2-ethylhexanoate tall-oil fatty acids complexes, 5,5,13,13-tetradehydro-4,5-dihydro-4,8,10,15-tetranitro-7,11-metheno-11H,13H-tetrazolo[1,5-c][1,7,3,5,2,6]dioxadiazadiplumbacyclododecine, Lead, di-mu-hydroxy(2-methyl-4,6-dinitrophenolato-kappaO)(nitrato-kappaO)di-, Chromic acid lead salt with lead molybdate, Bismuth alloy, Bi 50,Pb 25,Cd 12,Sn 12 (L-pbbi50Sn12.5Cd12.5), Sulfuric acid, lead(2+) lead(4+) salt (3:1:1), Boric acid (H3BO3), solid soln. Slag formed as the feed progresses through the blast furnace in lead smelting. Such solutions should be so adjusted that when 0.15 mL of the indicator solution is added to 25 mL of carbon dioxide-free water, 0.25 mL of 0.02 N acid or alkali, respectively, will produce the characteristic color change. Registration, Evaluation, Authorisation and Restriction of Chemicals, Chemical Agents Directive and Carcinogens or Mutagens Directive, ROHS Directive - Restricted Substances as per Article 4(1), Annex II, Substances of very high concern identification, Recommendation for the Authorisation List, Getting started with EU chemicals legislation, Classification of substances and mixtures, Harmonised classification and labelling (CLH). Examples of suitable esters are, for instance, ethyl methacrylate, propyl crotonate, allyl crotonate, allyl acetate, oleyl acetate, cyclohexyl acrylate, diethyl maleate, oleyl cinnamate, ethyl linoleate, unsaturated fatty acid glycerides, and the like. References Cited in the file of this patent UNITED STATES PATENTS 2,312,535 Feiser Mar. The dissipation effect of as seen adding the synthetic Peracetic acid (FPAA) of compound stabilizer and surfactant by table 5-8 slightly is better than only adds the synthetic Peracetic acid (WPAA) of compound stabilizer. A cadmium-indium-enriched product obtained from the recirculation of copper-lead blast furnace flue dusts. Consist primarily of lead and lead oxide. The pH of the reaction medium in the required range of 3 to about 6.5 has little or no effect upon the rate of epoxidation, but increasing acidity within this range tends to increase rate of hydration of the epoxide initially formed. Unite This invention relates to the synthesis of alpha, betaepoxides, that is, compounds containing an oxirane ring -It deals with an advantageous method for producing these compounds by reacting ethylenic compounds with hydrogen peroxide. 5 6. This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 77603. Preferably, described benzenetricarboxylic acid can be 1,2,3-benzene-1,1,3,5-1,3,5-Benzenetricarboxylic acid, 1,2, a kind of in the 4-trimellitic acid etc. It will be understood that the foregoing examples are merely illlustrative and that the present invention broadly comprises contacting an ethylenically unsaturated compound with hydrogen peroxide or a compound which forms such peroxide under the reaction conditions in an acidic aqueous medium at a pH of at least 3 in the presence of an acid salt of a peracid of a heavy metal whereby an epoxide is formed. [Mo], Peracetic acid in single-ingredient disinfection solution and preparation method thereof, Concentrated compound peroxyacetic acid and quaternary ammonium salt disinfection solution, Hydrogen peroxide and peracetic acid mixed disinfectant and preparation method thereof, The preparation method and product of a kind of PET bottle disinfectant, A method of preparing anhydrous Perpropionic Acid, A kind of Peracetic acid composite disinfectant and preparation method thereof, A kind of thimerosal and preparation method, Compound o-phthalaldehyde disinfectant and preparation process thereof, Disinfectant for cleaning endoscope and preparation method thereof, Low-temperature peroxyacetic acid disinfectant and preparation method thereof, Preparation method of mixture of hydrogen peroxide and peracetic acid, Low-corrosivity peroxyacetic acid disinfectant containing wetting agent and preparation method thereof, Activated peroxide compositions for anti-microbial applications, Fractional determination method of peracetic acid and hydrogen peroxide, Bactericidal/disinfectant peracetic composition, Stability perchlorizing disinfection liquid, and preparation method, Stable peroxyacetic acid solution, preparation method thereof and stabilizer for preparation, Stable activation-state javelle water and preparation method thereof, Stable corrosion-resistant peroxyacetic acid disinfectant and production method thereof, Composition for bactericide production and process for producing organic peracid, Microemulsions and uses therof as nanoreactors or delivery vehicles, Cocoyl dimethyl ammonium iodine oxide complex, Novel environmentally-friendly corrosion-resistance peracetic acid disinfectant, Method of preparing amidoamine alkoxylates and compositions thereof, Washing agent having increased primary washing efficiency, High-stability non-ionic N-vinyl butyrate lactam iodine solution and related preparation method, Mixed metal complexes in solution. Alternatively the reaction mixture can be heated to a higher temperature after reaction of the hydrogen peroxide is complete, to effect hydration of the epoxide. 15. For use in staining endocrine tissue, dilute this test solution with an equal volume of water. Folin Ciocalteu Reagent. A process in accordance with claim 7 wherein the acid tungstate is produced in the reaction by adding so dium hydroxide and tungstic acid to the aqueous reaction mixture in proportions which give a pH between about 4.5 and 6.0. Oxides formed during melting, refining, and casting of solders. Clipping is a handy way to collect important slides you want to go back to later. Consists primarily of oxides and silicates of antimony and lead. Consists primarily of antimonides and arsenides of copper and nickel. 0 (s. s 77. 12. 1. By-product of the refining of bismuth. A PROCESS FOR PRODUCING AN EPOXIDE WHICH COMPRISES REACTING A NON-CONJUGATED ETHYLENIC COMPOUND CONTAINING NOT MORE THAN TWO ETHYLENIC GROUPS AND HAVING AT LEAST ONE CARBON ATOM BETWEEN ANY TWO SUCH ETHYLENIC GROUPS WITH HYDROGEN PEROXIDE IN THE PRESENCE OF AN ACID SALT OF AN UNSTABLE PERACID-FORMING ACID OF A HEAVY METAL OF THE GROUP CONSISTING OF TUNGSTEN AND MOLYBDENUM AT A PH BETWEEN 3.0 AND 7.0. Example V Batch epoxidation of allyl alcohol was carried out using an allyl alcohol to hydrogen peroxide mole ratio of 1.5, a mole ratio of water to hydrogen peroxide of 33.5, 0.5% by weight of tungstic acid, plus sulficient sodium hydroxide to form sodium acid tungstate and maintain the pH at 4.2 to 4.5. Tap here to review the details. Composed primarily of lead but also containing other non-ferrous metals and gangue constituents. Composed primarily of arsenic, lead and iron and may contain other residual non-ferrous metals and their compounds. The invention will thus be seen to be capable of wide variation not only with respect to the ethylenic compounds which can be successfully reacted and the acid persalt catalysts which are effective in promoting the reaction, but also in regard to the method of carrying out the new process in its various modifications. At temperatures of about 100 to 175 C., for instance, hydration is complete in about 180 to about 5 minutesat a pH of about 5 to 6. with calcium chloride, calcium fluoride, calcium oxide, phosphorus oxide (P2O5) and strontium oxide, lead and manganese-doped, barium calcium cesium lead samarium strontium bromide chloride fluoride iodide europium doped, Lead, isodecanoate naphthenate complexes, basic, Cadmium sulfide (CdS), solid soln. This website uses cookies to ensure you get the best experience on our websites. Slurry coating compositions of eutectic metal alloy powders and of non-eutectic metal powders, including an elemental powder of a silicide-former in a heat-curable liquid binder. However, these operating variables are interrelated. Acid salts of the acids of the metals of group VI of the periodic table are a useful class of catalysts. Organic phosphorus compound have can be for the P atom that utilizes lone pair electrons, and with tungstates or molybdate acting in conjunction, but the part trace meter in the complex solution (Fe, Co, Ni etc.) Consist primarily of cadmium, thallium and lead and oxides of cadmium, thallium, calcium and arsenic. Spinels, boron calcium lead silicon white, Chromic acid (H2CrO4), lead(2+) sodium salt (2:1:2), Arsenic acid, (H3-As-O4), lead(4+) salt (4:3), Chromium lead oxide sulfate, silica-modified, Lead, C9-28-neocarboxylate 2-ethylhexanoate complexes, basic, Pigment Lightfast Lead-Molybdate Orange OS (9CI), 2-[bis(carboxylatomethyl)amino]acetate;lead(2+), Benzenesulfonic acid, 4-C10-13-sec-alkyl derivs., lead(2+) salts, Plumbane, triethyl[[(4-methylphenyl)sulfonyl]oxy]-, Lead C3-13-alkanecarboxylate naphthenate complexes, Lead, C6-19-branched carboxylate naphthenate complexes, Fatty acids, tallow, hydrogenated, lead salts, Sulfuric acid, barium salt (1:1), lead-doped, Dibismuth dilead tetraruthenium tridecaoxide, Chromic acid (H2CrO4), lead(2+) potassium salt (2:1:2). Now customize the name of a clipboard to store your clips. They impart a pH of the order of 1.5 or less to the reaction mixture at the concentration in which they are used and result in the production of hydroxylation products rather than epoxides. More usually, however, due to the tendency to form acidic by-products during the reaction, it is desirable to add additional base or suitable buffering agents or the like to insure that the pH of the mixture is maintained within the indicated necessary range, preferably between about 4.5 and about 6, at least until the bulk of the hydrogen peroxide has been reacted, and more preferably throughout the reaction. The gels were stirred and dried for 2.5 h at 80C and then placed on polyethylene columns. A procedure which has been found to give good results in continuous operation comprises reaction in a plurality of reactors connected in series. 1. take by weighing potassium tungstate 25g, hydroxy-methylbenzene fork diphosphonic acid 25g, 1,2 respectively, 3-benzene-1 50g mixes and fully stirs obtaining the 100g compound stabilizer. Both of these procedures have disadvantages. With a residence time of 2.4 hours the hydrogen peroxide conversion was 99.1% and the product had a glycidol to glycerol mole ratio of 13.3. Consists primarily of sodium-tellurium salts in various states of oxidation. REACH regulationaims to improve the protection of human health and the environment from the risks that can be posed by chemicals. Instant access to millions of ebooks, audiobooks, magazines, podcasts and more. Title: Total Protein Estimation by Lowry Method In many cases it is not necessary to separate the epoxide product from the polyol by-product thus obtained in order to make use of the epoxide value of the product. A mole ratio of water to epoxide of about 5:1 to about 100:1 is desirable in the reaction mixture for rapid hydration with minimum by-product formation. However, as a rule, we find it more advantageous in reactions with ethylenic alcohols, to remove any excess of such alcohol which may be present in the reaction mixture after completion of the epoxidation stage of the process, before carrying out hydration of the epoxy alcohol since the formation of ethers and other undesirable by-products can be reduced in this way. A scum formed on the surface of antimonial lead. Example IV The importance of keeping the temperature low during the epoxidation to minimize the hydration of glycidol before the allyl alcohol is removed is shown by the higher glycidol yields on either hydrogen peroxide charged or the allyl alcohol consumed. Beryllium is a chemical element with the symbol Be and atomic number 4. The mixture was warmed to 50 C. with stirring and 100 grams (1 mole) of 34% hydrogen perxodie was added over a period of 2 /2 hours while the temperature was kept at 50-55 C. by cooling with a stream of air. Residues from treating lead refinery ores and residues containing precious metals with sodium boroplumbate followed by thermal fusion. Close It has a metallic luster, a black or bluish-black streak, and readily soils the fingers.The specific gravity is about 4.8. An inorganic pigment that is the reaction product of high temperature calcination in which lead (II) oxide, silicon oxide, tin (IV) oxide, and zinc oxide in varying amounts are homogeneously and ionically interdiffused to form a crystalline matrix of spinel. Typical examples of this preferred type of starting ethylenic compound are, for instance, allyl alcohol, methallyl alcohol, crotyl alcohol, allyl carbinol, methy vinyl carbinol, dimethyl allyl carbinol, oleyl alcohol, citronellol, geraniol, linalool, cyclohexenol, the terpineois, cinnamyl alcohol, and related monoand poly-olefinic monoand poly-hydroxy alcohols. For the preparation of Test Solutions, use reagents of the quality described under, For use, mix exactly equal volumes of Solutions. This hydration can be carried out in various Ways. 14, 1950 2,543,419 Neiderhauser Feb. 27, 1951 2,555,927 Himel June 5, 1951 2,613,223 Young Oct. 7, 1952 OTHER REFERENCES Mugdan: J. Chem. Allyl Alcohol Tungstic pH Glycidol to Hydrogen Acid (wt. Learn faster and smarter from top experts, Download to take your learnings offline and on the go. The precipitated calcium tungstate is readily recovered by filtration and can be recycled with added tungstic acid in the amount required to give a pH of 4.5 to 6.5 to serve as catalyst in the process. 1 is the comparison diagram of the stability of two kinds of production method Peracetic acid; Fig. After removal of the unreacted allyl alcohol and hydration at 145 C. and 100 p. s. i. g. the final yields of glycerol based on the allyl alcohol consumed were 84 mole percent for the lower pH case and 87 mole percent for the higher pH case. he intramolecular ChaB plays an essential role in not only locking the molecular conformation of the merocyanines but also enhancing the optical, thermal, and electrical efficiency properties of the photon-to-current conversion optoelectronic devices. As a rule hydration of the initially'formed epoxide is preferably effected at a pH between about 4 and 9, more preferably about 5 to about 7. The invention provides a preparation method of high purity ferric trichloride, and the preparation method comprises the following steps: a deactivated iron catalyst and ammonium chloride are stoichiometrically mixed and heated, when the heating temperature reaches to 115-130 DEG C, the heating is stopped, heat preservation is performed for 21-25min, then ferric 3. add surfactant such as isomery alcohol ether non-ionic surface active agent in peroxyacetic acid disinfectant of the present invention, belong to low bubble non-ionic surface active agent, its characteristics are that foam is low, and easily biological-degradable is acidproof, resistance to oxidation.The adding of such surfactant can improve the wetability of peroxyacetic acid disinfectant, promotes disinfectant and surperficial contacting, and improves Disinfection Effect. The similar reaction of 1,4-butene-2-dio1 with hydrogen peroxide at a pH of 5.0 to 5.5 gives 2,3-epoxybutane-1,4- diol in excellent yield. 13. Still other objects and advantages of the invention will be apparent from the following description of the new process and of some representative examples of its numerous applications. A process for producing an epoxy alcohol which comprises contacting a mono-ethylenic alcohol with hydrogen peroxide in the presence of a water-soluble acid salt of an acid of a metal of the group consisting of tungsten and molybdenum while maintaining the pH of the mixture between 3.0 and 7.0. Looks like youve clipped this slide to already. The Determination of Total Protein Using the LAMBDA UV/Vis Spectrophotometer: Kenyatta university biuret protein determination, Estimation of Serum Protien by Biuret method, Estimation of Carbohydrates by anthrone method, Nutritional profiling and chemical analysis of food. Preferably, described compound stabilizer is made up of tungstates or molybdate, organic phosphorus compound, benzenetricarboxylic acid, and its consumption (weight) is than being 1: 1: 2. In general, the directive to prepare a solution fresh indicates that the solution is of limited stability and must be prepared on the day of use. A process in accordance with claim 7 wherein the mole ratio of allyl alcohol to hydrogen peroxide is 1:1 to 5:1, the mole ratio of water to hydrogen peroxide is 7:1 to :1, and the concentration of catalyst in the reaction mixture is 0.01% to about 2% by weight. This catalyst has the advantage that it can be recovered after the reaction by precipitation as calcium tungstate which can, by addition of acid, for example tungstic acid, be converted to a soluble calcium acid tungstate containing catalyst which has been found effective on recycling to the reaction. In addition to the specific ethylenically unsaturated compounds mentioned in these examples, other aiiphtic, cycloaliphatic and aralkyl ethylenically unsaturated compounds can be used in the process of this invention. Hydration is more rapid under more acid conditions, e. g. pH about 1 to 2, but there is a greater tendency to form by-products. A special object is the provision of an efficient method of producing epoxides from ethylenic hydrocarbons and/or ethylenic alcohols which have given special difliculty in epoxidation by prior methods. By accepting, you agree to the updated privacy policy. An inorganic pigment that is the reaction product of high temperature calcination in which boron oxide, calcium oxide, lead (II) oxide, and silicon oxide in varying amounts are homogeneously and ionically interdiffused to form a crystalline matrix of spinel. 10. Restricted per Art. 198. 1. add the synthetic Peracetic acid (WPAA) of compound stabilizer: hydrogen peroxide and acetate react in the presence of compound stabilizer, and Peracetic acid concentration is 20.13% during use. 1; And when not adding catalyzer, the aggregate velocity of Peracetic acid is relatively slow, just records its maximum concentration after 144 hours.Because the both do not add other stabilizing agents, the degraded of Peracetic acid is also than comparatively fast, and its degradation rate has all surpassed 50% after 60 days. A process for producing an epoxide which comprises intimately contacting a non-conjugated ethylenic compound containing not more than two ethylenic groups and having at least one carbon atom between any two such ethylenic groups, hydrogen peroxide and an acid salt of an acid of a metal of the group consisting of tungsten and molybdenum in an acidic aqueous medium at a pH of at least 3.0. The Support section provides tools and practical guidance to companies which have responsibilities under the EU chemicals legislation. The tests were made at two different concentrations of sodium acid tungstate obtained by adding 0.5 and 1.5% by weight respectively of tungstic acid and sufficient sodium hydroxide to convert the tungstic acid to the acid salt and to control the pH of the mixture. 6 Example- II The advantageous influence of high concentration or ethylenic compound in the epoxidation of allyl alcohol is shown by the following tests carried out by reaction in three stages at 50 C., 60 C. and 70 C. and residence times of 2, 1.5 and 1.5 hours, respectively, in the stages, and a water to hydrogen peroxide mole ratio in the feed, all of which was supplied to the first stage, of about 3.4. The hydration time which will be required for complete conversion of the epoxide will depend upon the temperature used and the pH of the mixture as well as the amount of water employed. A scum formed on the surface of molten copper. about 2 Mole ratio of water to hydrogen peroxide, 5:1 to 70:1, most preferably about :1 to about 40:1 Concentration of acid persalt catalyst (weight percent of reaction mixture), 0.01 to about 5%, most preferably about 0.02 to about 0.5%. Introduction. Composed primarily of lead, antimony and precious metals and may contain other residual non-ferrous metals and their compounds. The preparation method of peroxyacetic acid disinfectant of the present invention has following technological merit and characteristics: 1. primary raw material of the present invention adopts common hydrogen peroxide and acetate to produce; can improve Peracetic acid concentration though adopt acetic anhydride to replace acetate to make raw material; but in generative process, can produce explosive accessory substance diacyl peroxide; production process is on the rack entirely; and require complicated production technology and security measure, cause the production cost height. Consists primarily of oxides of lead and tin. ECHA organises consultations to get feedback from all interested parties and to gather the widest possible range of scientific information for the regulatory processes. Consists of precious metals and their salts. Consists primarily of sodium sulfate, tellurium compounds and lead sulfate. The halohydrination route to epoxides often involves by-product formation which causes loss of yield and requires large investments of capital for the equipment required in the different steps of the process. Residue produced in lead smelting operations from the volatillsation of lead from materials smelted. 7. Residue from treatment of calcined zinc ore concentrates with antimony trioxide, zinc dust, lead oxide and copper sulfate. Consists primarily of lead with additional metal carbonates, hydroxides, sulfides or sulfates. These reactions have been carried out with peracids of heavy metals as catalysts. Method for preparing stable peracetic acid disinfectant, Application filed by Guangdong Huankai Microbial Sci and Tech Co Ltd, Guangdong Huankai Microbial Sci and Tech Co Ltd, N.N.N.N.N.N.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.[Mo].[Mo].[Mo].[Mo].[Mo].[Mo]. Ratio embodiment one: the synthetic Peracetic acid of typical method with do not add the comparison of the stability of the synthetic Peracetic acid of catalyzer (sulfuric acid): 1. typical method is synthetic: hydrogen peroxide and acetate react in the presence of sulfuric acid catalyst, 2. it is synthetic not add catalyzer: hydrogen peroxide and acetate directly react. 16. Composed primarily of arsenic oxide (As2O3). Includes those cases in which aluminum is used to remove arsenic, nickel and antimony. Peroxyacetic acid disinfectant of the present invention, each raw material mass percent is: hydrogen peroxide: 27-39%, acetate: 22-36%, compound stabilizer: 0.01-2%, surfactant: 0.01-2%, all the other are water.The mass concentration of Peracetic acid is 15-20g/100g in the prepared peroxyacetic acid disinfectant, hydrogen peroxide: 20-30%, acetate: 10-20%. Detection of Adulterants and Contaminants of Milk. The invention relates to a method for preparing stable peracetic acid disinfectant. Fusion of the alloys of lead and silver (manganese may also be present) and simultaneous oxidation occur. Preferably, described organic phosphorus compound can be a kind of in ethylenediamine tetraacetic methyl acid phosphate, hydroxy-methylbenzene fork diphosphonic acid, hydroxyl ethane fork diphosphonic acid, diethylenetriamine five methene phosphoric acid, the dimethylamino methane fork diphosphonic acid etc. Gently reflux the mixture for about 10 hours, and add 150 g of lithium sulfate, 50 mL of water, and a few drops of bromine. Similar solutions are intended for use in pH measurement. This is unique source of information on the chemicals manufactured and imported in Europe. A process for producing an epoxide which comprises reacting a non-conjugated ethylenic compound containing not more than two ethylenic groups and having at least one carbon atom between any two such ethylenic groups with hydrogen peroxide in the presence of an acid salt of an unstable peracid-forming acid of a heavy metal of the group consisting of tungsten and molybdenum at a pH between 3.0 and 7.0. Frit is a mixture of inorganic chemical substances produced by rapidly quenching a molten, complex combination of materials, confining the chemical substances thus manufactured as nonmigratory components of glassy solid flakes or granules. The preparation method of peroxyacetic acid disinfectant of the present invention specifically may further comprise the steps: 1. take by weighing tungstates or molybdate, organic phosphorus compound, benzenetricarboxylic acid and fully mix by 1: 1: 2 part by weight and make compound stabilizer. Consists primarily of oxides and sulfates of lead and lead alloys. Example I The effect of pH on the yield of glycidol from hydrogen peroxide in the continuous epoxidation of allyl alcohol is shown in the following table. Sterilization effect is shown in table 1-4. Folin-Ciocalteu Phenol TS Into a 1500-mL flask introduce 100 g of sodium tungstate, 25 g of sodium molybdate, 700 mL of water, 50 mL of phosphoric acid, and 100 mL of hydrochloric acid. Thermodynamic and spectrophotometric study of copper (II)-citrate heterobinuclear complexes with nickel (II), zinc (II) or cadmium (II) in aqueous solution, Povidone iodine and preparation method and application thereof, Acidic disinfectant and preparation method thereof, Method for preparing cyclohexanol and cyclohexanone by catalytic oxidation of cyclohexane, Titanium phosphate containing an activated composition and having fast dissolution and storage stability, Method for producing equilibrium peracetic acid composition having excellent stability, Kinetic studies on effects of EDTA and surfactants on reduction of vanadium (V) to vanadium (IV) in sulphuric acid medium, Mixt. The. It Was unexpected, I. therefore, to find that by using an acid persalt catalyst and maintaining the'pH of the mixture in the range of 3 to about 6.5 as indicated, epoxide products can be obtained in substantial yields which make this a commercially attractive method for their synthesis. 3. water is pumped in the enamel jacket reactor, add stirring and dissolving behind compound stabilizer and the surfactant, pump into hydrogen peroxide, acetate more successively, stirred 30 minutes, be stable peroxyacetic acid disinfectant. with zinc sulfide, copper and lead-doped, 2-[carboxylatomethyl(carboxymethyl)amino]acetate;lead(2+), Perchloric acid, reaction products with lead oxide (PbO) and triethanolamine, Gilsonite, polymer with cyclopentadiene, dicyclopentadiene and linseed oil, lead salts, Lead, naphthenate neodecanoate complexes, basic, 1,2-Benzenedicarboxylic acid, lead(2+) salt, basic, [-(4,6-dinitroresorcinolato(2-)-O1,O3)]dihydroxydilead, Chromium lead molybdenum oxide sulfate, silica-modified, Lead, 2-ethylhexanoate isodecanoate complexes, basic, Residues, precious metal refining cementation, Fatty acids, tall-oil, lead manganese salts, (2-Methyl-4,6-dinitrophenoxy)(nitrooxy)diplumboxane monohydrate, 1-Propanesulfonic acid, 2-hydroxy-, lead salt, Residues, precious metal recovery lead refining, 2-Propenoic acid, 2-methyl-, lead salt, basic. By-product from the smelting of lead ores, scrap lead or lead smelter dross. Spectrophotometric Oxidation Method for the Determination of Teneligliptin by Alcohol induced metabolic alterations - A Case based discussion, ATP- The universal energy currency of cell, Biological tests and Bioassay of Oxytocin. Activate your 30 day free trialto unlock unlimited reading. It has been found that these difficulties can be eliminated or reduced by carrying out the reaction as an initial epoxidation with hydrogen peroxide in the presence of an acid persalt catalyst of the previously mentioned type at a pH between 3 and 7, most preferably from 4.5 to about 5.5, followed by hydration of the epoxide product by reaction with water. Preferably, described molybdate can be a kind of in sodium molybdate, potassium molybdate, lithium molybdate and the ammonium molybdate etc. For the preparation of Test Solutions, use reagents of the quality described under, For use, mix exactly equal volumes of Solutions. Composed primarily of elemental lead, lead acetate and basic lead carbonate hydroxide. The revised Drinking Water Directive aims to protect citizens and the environment from the harmful effects of contaminated drinking water and to improve access to drinking water. Residues, copper-iron-lead-nickel matte, sulfuric acid-insol. Please note: If you switch to a different device, you may be asked to login again with only your ACS ID. The remaining impurities are mostly eliminated by means of digestion with sodium hydroxide. Such removal of excess ethylenic compound will usually be desirable prior to recovery of the epoxide in a pure or purified form which can be carried out by distillation and/or extraction or other suitable methods. Crusts formed on the surface of cooling molten lead during the desilverizing of lead. 2. add the synthetic Peracetic acid (WPAA) of compound stabilizer: hydrogen peroxide and acetate react in the presence of compound stabilizer, and Peracetic acid concentration is 20.13% during use. Pyrolusite is a mineral consisting essentially of manganese dioxide (Mn O 2) and is important as an ore of manganese. 4(1) of RoHS, each listed substance includes a maximum concentration value tolerated by weight in homogeneous materials. Find out more on how we use cookies. Development and characterization of hbsag loaded plga microspheres for muco a Analytical Method Development and validation of UV-Visible spectroscopy. Other ethylenic carbonyl compounds can also be epoxidized in accordance with the invention, for example, methyl vinyl ketone, methyl allyl ketone, ethyl isopropenyl ketone, mesityl oxide, phorone, isophorone, methyl cyclohexenyl ketone, vinyl phenyl ketone, crotonaldehyde, citronellol, the cyclocitrals, ionone, cinnamyl aldehyde, etc. The different peracetic acid disinfectant liquid of table 1 are to colibacillary killing effect, Annotate: average positive control bacterium several 3.18 * 10, The different peracetic acid disinfectant liquid of table 2 are to the killing effect of staphylococcus aureus, Annotate: positive control bacterium several 2.45 * 10, The different peracetic acid disinfectant liquid of table 3 are to the killing effect of black-koji mould, Annotate: average positive control bacterium several 1.31 * 10, The different peracetic acid disinfectant liquid of table 4 are to the killing effect of bacillus subtilis black variety gemma, Annotate: average positive control bacterium several 2.67 * 10. Gels were prepared using 188 W-tungstate solutions of four different pH values (in the range of 1.9512) at a Ti : W molar ratio of 1 : 1. In addition, the preparation method of peroxyacetic acid disinfectant of the present invention, its Peracetic acid concentration can be regulated by the increase and decrease of hydrogen peroxide and acetic acid raw material consumption, satisfies the needs of variable concentrations. Example XI Glycerol was produced by reacting allyl alcohol with hydrogen peroxide in a three-stage continuous reactor using sodium acid tungstate as the catalyst with additional sodium hydroxide to maintain the pH 5.1 to 5.5 and heating the resulting mixture under reflux at 100 C. for 4.8 hours after adjusting the pH to 7.0 by addition of 0.1 normal sodium hydroxide. When using magnesium acid tungstate as the catalyst under similar reaction conditions good yields of glycidol are also obtained. What is the Classification and Labelling Inventory? Here we use paramagnetic ferrocenium polymers to prepare TP-oriented AEMs under a magnetic field. to about 150 hrs., most preferably about 2 hrs., to about 90 hrs. The SlideShare family just got bigger. Fluorides of these elements may also be included in combination with these primary substances.@Aluminum@Manganese@Antimony@Molybdenum@Arsenic@Neodymium@Barium@Nickel@Bismuth@Niobium@Boron@Phosphorus@Cadmium@Potassium@Calcium@Silicon@Cerium@Silver@Chromium@Sodium@Cobalt@Strontium@Copper@Tin@Gold@Titanium@Iron@Tungsten@Lanthanum@Vanadium@Lead@Zinc@Lithium@Zirconium@Magnesium. For economic reasons it is usually advantageous to limit the amounts of ethylenic compound and of catalyst which are employed since the costs of recovery of catalyst and of excess ethylenic compound can be reduced in this way. Folin-Ciocalteu Phenol TS Into a 1500-mL flask introduce 100 g of sodium tungstate, 25 g of sodium molybdate, 700 mL of water, 50 mL of phosphoric acid, and 100 mL of hydrochloric acid. 2. add the synthetic Peracetic acid (FPAA) of compound stabilizer and surfactant: hydrogen peroxide and acetate react in the presence of compound stabilizer and surfactant, and Peracetic acid concentration is 19.87% during use. Example VIII The advantage of pH control throughout the successive stages of epoxidation is evidenced by the higher glycidol to glycerol ratio and the higher overall yield of hydrated glycidol to glycerol after stripping off the unreacted allyl alcohol. Starch iodide paste TS must show a definite blue streak when a glass rod, dipped in a mixture of 1 mL of 0.1, -(1-Naphthyl)ethylenediamine Dihydrochloride TS, Water, recently distilled from a hard-glass flask, a sufficient quantity to make. Provision is made for feeding of reaction mixture from one stage to the next after the desired conversion has been achieved. A process for producing an epoxy alcohol which comprises contacting a mono-ethylenic alcohol with hydrogen peroxide in the presence of an alkali metal acid phosphotungstate at a pH between 3.0 and 7.0. It covers their hazardous properties, classification and labelling, and information on how to use them safely. An improved aluminide coating especially for superalloy substrates. It is a steel-gray, strong, lightweight and brittle alkaline earth metal.It is a divalent element that occurs naturally only in combination with other elements to form minerals. It is not always feasible to completely avoid hydration of the epoxide produced but, since the polyols which result from the hydration are also valuable products, this is not a great disadvantage of the process. Singleton and Rossi AJEV 1965, 16: 144-158, describe the preparation of the reagent from sodium tungstate, sodium molybdate, lithium sulfate, bromine, and some acids. In order to avoid hydration of the epoxide under the acid condi tions used for the reaction, it is desirable both to shorten the reaction time as much as possible and to operate at a low temperature. Preferably, described tungstates can be a kind of in sodium tungstate, potassium tungstate, tungstate lithium and the ammonium tungstate etc. By-product of refining lead ores obtained from baghouse and electro-static precipitator and as slurry from scrubbers. But it can be affected by sodium chloride (NaCl) and sodium cyanide solution. A thermally agglomerated substance formed by heating a mixture of metal sulfide concentrates, limestone, sand, furnace dross, miscellaneous zinc, lead and copper bearing materials, together with already roasted material to a temperature of 1000C to 1200C (538F to 649F). with barium oxide, calcium oxide and strontium oxide, lead and manganese-doped, 2-Propenoic acid, 2-methyl-, methyl ester, polymer with ethenylbenzene, lead(2+) 2-methyl-2-propenoate (1:2) and alpha-(2-methyl-1-oxo-2-propen-1-yl)-omega-((2-methyl-1-oxo-2-propen-1-yl)oxy)poly(oxy-1,2-ethanediyl), Phosphorodithioate O,O-bis(1,3-dimethylbutyl), lead salt, Slags, precious metal recovery lead refining, Silicic acid (H6Si2O7), barium magnesium strontium salt, lead-doped, Lead, C5-23-branched carboxylate octanoate complexes, Ethanedioic acid, lead(2+) salt (1:1), trihydrate, Resin acids and Rosin acids, calcium salts, polymers with lead resinates and sapond. Ratio embodiment four: add the comparison of the synthetic Peracetic acid of the compound stabilizer Peracetic acid dissipation effect synthetic with adding compound stabilizer and surfactant. Solution A : 2% sodium carbonate in 0.1N NaOH. Composed primarily of iron and lead (mainly in sulfide form) and may contain other residual non-ferrous metals and their compounds. percent Ratio in Mole per- Mole perieed Stage 1 Stage 3 product cent on cent on (mole ratio) H202 AA Charged Reacted I The tungstic acid was added with sufficient base to form the sodium acid tungstate and control the pH of the mixture as indicated. Epoxidation process using hydrogen peroxide and an acid salt of a heavy metal peracid, Application filed by Shell Development Co, 1,3,5-trimethyl-2-(2,4,6-trimethylphenoxy)benzene, [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])/C([H])=C([H])\C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H], [H]C([*])([H])C([H])=C(C([H])([H])[H])C([H])([H])[H], [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2], Compounds containing three-membered rings having one oxygen atom as the only ring hetero atom, Compounds containing oxirane rings with hydrocarbon radicals, substituted by singly or doubly bound oxygen atoms, Compounds containing oxirane rings with hydrocarbon radicals, substituted by singly or doubly bound oxygen atoms by free hydroxyl radicals, Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds, Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with hydrogen peroxide or inorganic peroxides or peracids, Process for the production of fluorocarbon epoxies, Novel treatments of textiles and textiles treated accordingly, Process for the production of glycerine by hydroxylation of allyl alcohol, Process for the production of 3,4-epoxytetramethylene-sulfone, Oxidation of olefins with tellurium compounds, Osmium catalyzed oxidation of olefinic compounds, Hydroxylation of unsaturated diols to prepare novel tetraols, Osmium catalyzed organic hydroperoxide hydroxylation of olefinic compounds, Process for the preparation of oxaziridine, Catalyst comprising tellurium chemically bound to aromatic polymer, Process for the preparation of vicinal diols soluble in water, Liquid modified ethylenic random copolymer and its uses, Process for the production of epoxidized fatty alcohols, Process for catalytically epoxidizing olefin with hydrogen peroxide, Epoxidation using hydrogen peroxide and tungsten catalysts, Epoxidation of ricinic compounds using a phase-transfer catalyst, Process for preparing unsaturated esters containing cyclic epoxy group, Biphasic process for epoxidation of olefinic compound using chromate or dichromate catalyst, Naphthoquinone oxides and method of preparing the same, Catalytic hydroxylation of olefinic double bonds, Hydroxylation of unsaturated organic compounds containing an alcohol or ether group, Catalytic hydroxylation of olefinic compounds, Method of epoxization of ethylenically unsaturated compounds, Process for the production of alkylene glycols, Preparation of soluble molybdenum catalysts for epoxidation of olefins, Oxidation of ethylbenzene to ethylbenzene hydroperoxide and epoxidation of olefins by reaction with ethylbenzene hydroperoxide, Preparation and Chemistry of Epoxy Alcohols, METHOD FOR PRODUCING EPOXIDIZED FATTY ALCOHOLS, Process for the production of methacrylic acid from isobutyraldehyde, 3,6-Dimethyl-oct-1-in-3-ols and -oct-1-en-3-ols and derivatives thereof, their use as fragrances and process for preparing 3,6-dimethyl-octan-3-ol, Cyclic process for the preparation of cyclohexene oxide as well as of cyclohexanol and cyclohexanone, METHOD OF EPOXYDATING OLEFINS BY HYDROGEN PEROXIDE, Process for the preparation of benzaldehyde by catalytic air oxidation of toluene in the liquid phase. The test was carried out in a three-stage continuous reactor using as feed to the first reaction stage 1.96 moles of allyl alcohol and 31.5 moles of water per mole of hydrogen peroxide. Product of neutralizing lead refining wastes to precipitate heavy metals. A process for producing glycidol which comprises contacting allyl alcohol in an aqueous medium with hydrogen peroxide and an alkali metal acid tungstate at a pH between 3.0 and 7.0. Example VI Epoxidizing methallyl alcohol under the conditions of Example V while maintaining the pH at about 5.0 gives a high yield of Z-methyl-glycidol. It is especially useful in the production of triols from ethylenic alcohols. This type of reaction has been chosen for purposes of illustration not only because especially valuable products can be obtained in this way but also because the process of the invention is particularly effective in minimizing the undesirable side reactions to which this type of starting ethylenic compound is especially susceptible in reactions with hydrogen peroxide. The first report of the hydrothermal growth of crystals was by a German geologist Karl Emil in 1845 . 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