Methyl alcohol peroxide

It is essential to use freshly recrystallised benzoyl peroxide. The commercial material usually gives poor results. Commercial benzoyl peroxide may bo recrystal, lised from a small amount of hot chloroform, or by dissolving in chloroform and precipitating with absolute methyl alcohol. 

Nef prepared acetol in several ways, the more important of which depended upon the reaction between bromoacetone and potassium or sodium formate or acetate, and the subsequent hydrolysis of the ester by methyl alcohol.1 2 Acetol is also formed, together with pyruvic acid, by the direct oxidation of acetone by Baeyer and Villiger s acetone-peroxide reagent.3... 

Methyl acrylate in methyl alcohol is available from Rohm and Haas Company, Philadelphia, Pa. Since the ester polymerizes in the presence of peroxides, it is necessary to add some hydroquinone as an inhibitor. The ester should not be stored for long periods of time, even when it contains hydroquinone. Storage should be in a refrigerator. 

Uses Manufacture of vanillin, Michler s ketone, methyl violet, and other dyes solvent reagent for methyl alcohol, hydrogen peroxide, methyl furfural, nitrate, and formaldehyde chemical intermediate stabilizer reagent. 

Problem 4.5 (a) Which of the following compounds can exist in different conformations (1) hydrogen peroxide, HOOH (2) ammonia, NH, (3) hydroxylamine, HjNOH (4) methyl alcohol. H,COH. (b) Draw two structural formulas for each compound in (a) possessing conformations. ... 

Urea Peroxide Carbaryl Calcium Carbide Methyl Alcohol... 

According to McLarren [52] a mixture with methyl alcohol has frequently been used in rockets, to react with hydrogen peroxide. E.g. in the HWK-59 jet propulsion engine and BP-20 rocket missiles 80% hydrogen peroxide is used as an oxidant together with a combustible consisting of ... 

According to Fedosyev and Sinyaryev [15] a mixture of 80% hydrogen peroxide with hydrazine hydrate diluted with methyl alcohol in the ratio of 1 1 has the following physico-chemical constants ... 

The formation of formaldehyde by reaction (17) is not consistent with the experimental data. H02 yielding peroxide is obtained besides formaldehyde. The reaction of the CH2OH radical with 02 was investigated63 under conditions comparable to those for the reaction O + CH3OH. The CH2OH radical was obtained by the reaction of hydrogen atoms with methyl alcohol. It was found that hydrogen atoms reacted with alcohol only, by abstraction of the H atom. The radical obtained yielded... 

Azoxybenzene has been prepared by reduction of nitrobenzene with alcoholic potassium hydroxide,1 with sodium amalgam,2 with hydrogen in the presence of lead oxide,3 with methyl alcohol and sodium hydroxide,4 with sodium methylate and methyl alcohol,5 and by electrolytic reduction 6 by oxidation of azobenzene with chromic anhydride 7 by treatment of /9-phenylhydroxylamine with alkaline potassium permanganate,8 with nitrobenzene,9 with mineral adds,10 and with mercury acetamide,11 and by oxidation of aniline with hydrogen peroxide,12 and with acid permanganate solution in the presence of formaldehyde.13 The procedure described above is a slight modification of one described in the literature.14... 

Surface hydroperoxidation succeeded also with isotactic a-olefin polymers, which can be used for further grafting it was found that vapors of methyl alcohol enhance considerably the rate of hydroperoxidation a peroxide content of about 3—5% can be obtained [172, 173). 

The reaction proceeds via a pentacoordinate hydroxycarbonium ion transition state, which cleaves to either fert-butyl alcohol or the tert-butyl cation. Since 1 mol of isobutane requires 2 mol of hydrogen peroxide to complete the reaction, one can conclude that the intermediate alcohol or carbocation reacts with excess hydrogen peroxide, giving fcrt-butyl hydroperoxide. The superacid-induced rearrangement and cleavage of the hydroperoxide results in very rapid formation of the dimethylmethyl-carboxonium ion, which, upon hydrolysis, gives acetone and methyl alcohol. 

Methyl alcohol can be oxidised under certain conditions to formaldehyde with a yield of 80 per cent. Elbs and Brunner employed 160 grams of methyl alcohol and 75 grams of sulphuric acid per litre. A smooth platinum anode with a current density of 3 75 amps, per dm.2 gave good results at 30° C., whilst anodes of platinised platinum or lead peroxide gave a low yield of formaldehyde and much carbon dioxide. 

While these experiments, which were carried out without giving a theoretical insight into the nature of the electrochemical reaction, yielded almost all the possible oxidation products in the oxidation of methyl alcohol, Elbs and Brunner 2 have discovered a method which gives 80% of the current yield in formaldehyde. This is exactly the substance which could not be proven present up to that time among the electrolytic oxidation products of methyl alcohol. Elbs and Brunner electrolyzed an aqueous solution of 160 g. methyl alcohol and 49 to 98 g. sulphuric acid in a litre. They employed a bright platinum anode in an earthenware cylinder, using a current density of 3.75 amp.1 and a temperature of 30°. Only traces of formic acid and carbonic acid and a little carbon monoxide, aside from the 80 per cent, of formaldehyde, were formed. Plating the platinum anode with platinum decreased the yield of formaldehyde at the expense of the carbon dioxide. With an anode of lead peroxide the carbon dioxide exceeded the aldehyde. 

The Step 1 product (11.5 mmol) dissolved in 30 ml methyl alcohol was treated with 4.5 ml 30% hydrogen peroxide containing 46 jxl 1M NaOH, then stirred 90 minutes at 0°C. The mixture was concentrated, washed with brine, and extracted three times with CH2C12. The combined organics were rewashed with brine, dried with Na2S04, reconcentrated, and the product isolated. 

Fig. 15. The influence of the pic d arret on product forrhation during the oxidation of propane. Initial temperature = 430 °C initial pressure of propane = 90 torr initial pressure of oxygen = 210 torr volume of reaction vessel = 30 cm , (b) Left ordinate +, methyl alcohol. Right ordinate x, isopropyl alcohol , ethyl alcohol o, n-propyl alcohol 1, allyl alcohol, (c) Left ordinate +, hydrogen peroxide , formaldehyde. Right ordinate x, total aldehydes, (d) +, propene i, methane , ethylene x ethane. (From ref. 147.)...

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