Other

Igor Jurievich Logutov

Jury Ivanovich Michurov

Yakov Abramovich Gurvich

Vladimir Avgustovich Yanshevsky

Alexandr G Liakumovich

Valerian Mikhailovich Sobolev

Boris Izrailevich Pantukh

Izrail M Belgorodsky

Grigory Iosifovich Rutman

Vladimir Romanovich Dolidze

Rufina Alexandrovna Filippova

Sofya Alexandrovna Egoricheva

Sergei Gerasimovich Vyborov

Alexei S Polenov

Engel R Adigamov

Method of removing aluminum-containing catalyst from phenol alkylation products comprises treating phenol alkylation products with water at a temperature of 165.degree.-250.degree. C., with water being in molar excess to aluminum in a range of 3-20. The resulting residue of meta-aluminate is easily separated by filtration. The present invention allows eliminating constant control of aluminum content in alkylation products, easily removing the catalyst therefrom and eliminating the loss of phenol alkylation products.

Method of removing aluminum-containing catalyst from phenol alkylation

A method for preparing 2,6-ditert.butylphenol which comprises alkylation of phenol in the presence of monotert.-butylphenol and a catalyst, viz. aluminium dissolved in phenol with gradually lowering the process temperature from 120.degree. to 50.degree. C and reducing the concentration of isobutylene in the mixture of isomeric butenes from 80 to 1.5 mol.%, followed by isolation of the desired product. The method according to the present invention makes it possible to achieve a high degree of conversion of isobutylene without impairing quality of the desired product. The amount of by-products formed in the process is 2-3 times as less as in the prior art methods.

Method for preparing 2,6-ditert.butylphenol

A method of preparing 2,6-di-tert.butylphenol comprises alkylation of phenol with isobutylene at a temperature within the range of from 100.degree. to 110.degree. C in the presence, as a catalyst, of phenyloxyorthotertbutylphenoxyhydroaluminum acid of the formula:

Method of preparing 2,6-di-tert.butylphenol

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Bashkirskaya ASSR, Sterlitamak, undefined

Igor Jurievich Logutov