Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1977-03-18
1978-09-19
Davis, C.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
252429B, C07C 310
Patent
active
041154681
ABSTRACT:
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.
REFERENCES:
patent: 3737474 (1973-06-01), Dunn
patent: 3872026 (1975-03-01), Dunn
Antonov Andrei Alexandrovich
Kabanov Viktor Alexandrovich
Martynova Marina Alexandrovna
Nametkin Nikolai Sergeevich
Pluzhnov Stanislav Konstantinovich
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