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Gennady Petrovich Belov

Fridrikh S Dyachkovsky

Alexandr G Liakumovich

Viktor I Zhukov

Jury Mikhailovich Sivakov

By Mikhail Chirkov, Administrator

Khaim-Mordkhe Aronovich Brikenshtein

Nikolai Mikhailovich Chirkov, Deceased

Nikolai Petrovich Shestak

Petr Evgenievich Matkovsky

Maria Nikolaevna Dyadjunova

Pavel Alexandrovich Vernov

Vyacheslav Ivanovich Smirnov

Ljudmila Nikolaevna Russiyan

Taimuraz Savelievich Dzhabiev

Ivan Davydovich Shevlyakov

Nelli Dzhavkharovna Karpova

Leonid Alexandrovich Shilov

Vladimir Evgenievich Kuzmin

Fridrikh Stepanovich Dyachkovsky

Matrena Petrovna Gerasina

Anatoly Dmitrievich Pomogailo

The method of dimerization of alpha-olefins consists in mixing at least one alpha-olefin with a two-component catalyst consisting of organic compounds of titanium, having the general formula Ti (OR).sub.4, and of aluminum, having the general formula AlR.sub.3, where R is an alkyl having from 1 to 6 carbon atoms, or an aryl, in a medium of a hydrocarbon solvent, at a temperature of 0.degree. to 100.degree. C and a pressure from 1 to 30 atm. Said constituents of the catalyst are pretreated with an ethylene-hydrogen mixture, containing from 5 to 95 percent by volume of hydrogen, at a temperature of from 0.degree. to 100.degree. C and a pressure of the ethylene-hydrogen mixture from 0.2 to 15 atm., for a period of time from 1 to 120 minutes. The method ensures high yields of butene-1 and hexenes, and high selectivity of the catalyst to said products. The butene-1 content of the butane mixture obtained in the process of ethylene dimerization is as high as 99 percent. The yield of butene-1 is from 80 to 345 g per gram of Ti(OR).sub.4 per hour. The hexene content in the dimerizate obtained in the process of dimerization of propylene, or a mixture of ethylene and butene-1, is 25 percent. The yield of hexenes is from 4 to 80 g per gram of Ti(OR).sub.4 per hour. The formation of polymers is significantly reduced.

Method of dimerization of alpha-olefins

The present invention relates to a method of producing butene-1. According to the invention, the method of producing butene-1 resides in dimerizing ethylene in the presence of a complex organometallic catalyst of the formula (RO).sub.3 TiR' .AlR.sub.2 'OR + AlR.sub.2 'R', where R is an alkyl radical with from 2 to 4 carbon atoms, R' = R or H, R' is the same as R, or a catalyst having the formula Ti(OR).sub.4 + AlR.sub.2 'R' and modifiers such as (C.sub.5 H.sub.5).sub.2 TiCl.sub.2, oxygen, metaphenylenediamine or N-phenyl-.beta.-naphthylamine, in the medium of solvents such as n-heptane, n-decane, toluene, diethyl ether, ethyl chloride, vinylbutyl ether, tetrahydrofuran, diphenyl ether, methylphenyl ether and mixtures thereof. The invention will find application in petrochemical processing.

Method of producing butene-1

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Moscow, Russia

Gennady Petrovich Belov