Catalyst for the dimerization of olefins
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 DEG to 100 DEG C. under a pressure of from 1 to 40 atm with a two-compone...
Saved in:
Main Authors | , , , |
---|---|
Format | Patent |
Language | English |
Published |
05.02.1980
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | 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 DEG to 100 DEG C. under a pressure of from 1 to 40 atm with a two-component catalyst consisting of: (1) a complex of a nickel salt with a tertiary phosphine or tertiary phosphite; (2) an organoaluminum compound comprising a natural or synthetic carbochain rubber, swellable in said solvents, containing 2 to 50 mol. % of AlRX units, wherein R is an alkyl with at most 8 carbon atoms, X is a halogen; atomic ratio Al/Ni being varied within the range of from 1 to 100. The catalyst employed in the method according to the present invention features high stability (retaining its original activity for a long time); it is not crushed and can be readily regenerated. The catalyst demonstrates high selectivity: a content of butene-1 in a mixture of butenes obtained from dimerization of ethylene is as high as 80%; content of methylpentenes in a dimerizate resulting from dimerization of propylene is as high as 90 to 95%. |
---|---|
Bibliography: | Application Number: US19780895341 |