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Zoya Stepanovna Shalimova

Jury Ivanovich Michurov

Alexandr G Liakumovich

Grigory Iosifovich Rutman

Nina Vasilievna Zakharova

Dmitry Vladimirovich Sokolsky

Felix Borisovich Gershanov

Vladimir Romanovich Dolidze

Jury Mikhailovich Sivakov

Vasily Dmitrievich Popov

Anatoly Borisovich Fasman

Viktor Anatolievich Zavorin

Tulkibai Galikbarovich Dautov

Venera Fatykhovna Timofeeva

Ivan Egorovich Abramov

Daniel Kalimullovich Bazhakov

A method of preparing 2,6-di-tert.butyl-4-methylphenol comprising reacting 2,6-di-tert.butylphenol with formaldehyde and dimethylamine in a medium of methanol or ethanol at a temperature within the range of from 80.degree. to 90.degree. C to give a reaction mass containing N,N-dimethyl-3,5-di-tert.butyl-4-hydroxybenzylamine and readily-volatile products such as methanol or ethanol, water and bis-amine. The readily-volatile products are removed from the reaction mass by heating thereof to a temperature within the range of from 110.degree. to 140.degree. C simultaneously with purging the reaction mass with an inert gas containing a secondary amine in an amount of from 5 to 50% by volume. Thereafter, N,N-dimethyl-3,5-di-tert.butyl-4-hydroxybenzylamine is contacted with hydrogen at a molar ratio therebetween of 1:4-10 respectively on a hydrogenation catalyst at a temperature ranging from 120.degree. to 160.degree. C, to give the desired product which is then isolated. The method according to the present invention makes it possible to increase the desired product yield and improve quality thereof as compared to the prior art methods. The yield of the desired product is 98.7% as calculated per the starting raw materials. The method is technologically simple.

Method of preparing 2,6-di-tert.butyl-4-methylphenol

A method of producing 2,6-ditertbutyl-4-methylphenol comprises hydrogenolysis of N,N-dimethyl-(3,5-ditertbutyl-4-hydroxybenzyl)-amine in the presence of a fused catalyst, containing Ni, Al, Ti, in the medium of a solvent, namely 2,6-ditertbutyl-4-methylphenol solvent medium. The invention allows improving the quality of the product and obtaining it with a high yield.

Method of producing 2,6-ditertbutyl-4-methylphenol

A catalyst for hydrogenolysis of N,N-dimethyl-3,5-ditert.butyl-4-hydroxybenzylamine which comprises an alloy of nickel, aluminum, chromium, molybdenum and palladium. The components are contained in said alloy in the following proportions, percent by weight:

Catalyst for hydrogenolysis of

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Zoya Stepanovna Shalimova