Other

Stanislav Konstantinovich Pluzhnov

Vladimir Ivanovich Smetanjuk

Viktor Alexandrovich Kabanov

Marina Alexandrovna Martynova

Andrei Alexandrovich Antonov

Nikolai S Nametkin

Jury N Bocharov

A method and composition for dimerization of olefins containing 2 to 4 carbon atoms, wherein at least one of said olefins is mixed, in a medium of hydrocarbon or halogenated hydrocarbon solvents at a temperature ranging from 0.degree. to 100.degree. C. under a pressure of from 1 to 40 atm with a two-component catalyst consisting of:

Catalyst for the dimerization of olefins

A method for dimerization of olefins containing 2 to 4 carbon atoms, wherein at least one of said olefins is mixed, in a medium of hydrocarbon or halogenated hydrocarbon solvents at a temperature ranging from 0.degree. to 100.degree. C under a pressure of from 1 to 40 atm with a two-component catalyst consisting of:

Method for dimerization of olefins

A method for dimerization of olefins with a number of carbon atoms of at most 10 which comprises intermixing, in a medium of solvents selected from the group consisting of hydrocarbon solvents and halogenated hydrocarbon solvents at a temperature ranging from -20.degree. to +100.degree. C under a pressure of from 1 to 45 atm, of at least one of said olefines with a two-component catalyst consisting of an organoaluminum compound of the formula R.sub.n AlX.sub.3-n, wherein R is an alkyl with a number of carbon atoms of at most 8, X is a halogen, n = 1 or 2, and a graft-copolymer, swellable in said solvents, of a rubber selected from the group consisting of natural, synthetic carbo-chain and vinyl-containing siloxane rubbers, with vinylpyridine; said copolymer containing 0.5 to 40% by weight of polyvinylpyridine fragments complexed with a nickel salt; molar ratio between said organoaluminum compound and said nickel salt ranging from 1:1 to 100:1. In the method according to the present invention use is made of a catalyst with a maximal number of working active centers thus making it possible to substantially increase the process rate (for example, the rate of dimerization of propylene is about 9 kg of the product per gram of Ni per hour). The method can be performed under both batch and continuous operation conditions.

The method of dimerization of olefins having from 2 to 4 carbon atoms consists in that at least one said olefin is mixed, in a medium of hydrocarbon or halogenated hydrocarbon solvents at a temperature of from 0.degree. to 100.degree. C and a pressure from 1 to 40 atmospheres, with a catalyst, which is a graft copolymer of a natural or a synthetic carbon-chain rubber with vinylpyridine; said copolymer swells in said solvents and contains from 0.5 to 40 per cent of fragments of polyvinylpyridine that are complexed with a nickel salt, and contains also from 2 to 50 mole per cent of -AIRX- units, where R is an alkyl having not more than 8 carbon atoms, and X is a halogen, the aluminum atom being bound with the main chain of the copolymer through the carbon atom. The atom ratio of Al/Ni is from 1 to 20. Said catalyst is characterized by high stability and preserves it initial activity for a long period of time. It is not crushed in the process and is easy to recover. The catalyst is characterized also by high selectivity: the butene-1 content of a mixture of butenes, obtained by dimerization of ethylene, is 92 to 96 per cent. The methyl-pentene content of the dimerizate, obtained by dimerization of propylene, is 90 to 95 per cent.

Growing community of inventors

Moscow, Russia

Stanislav Konstantinovich Pluzhnov