Catalysts for the selective dimerization of ethylene or propylen

Details Catalysts for the selective dimerization of ethylene or propylen Catalysts for the selective dimerization of ethylene or propylen

1986-06-27

1988-06-07

Pal, Asok

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

585514, 585527, 585529, 585531, B01J 2374, B01J 3116, C07C 224

Patent

active

047496754

ABSTRACT:
The present invention relates to a catalyst for the selective dimerization of ethylene or of propylene into monoolefines of the type based on nickel on a silica support whose active sites are complexes of the Ni.sup.+ ion. This catalyst is characterized in that practically the whole of the nickel is present in the form of Ni.sup.+ complexes co-ordinated with the oxygen of the surface of the silica support and whose co-ordination sphere comprises one or two trialkylphosphine ligands. The invention also relates to a process for the preparation of these catalysts and to a process of dimerization employing them.

REFERENCES:
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patent: 4520122 (1985-05-01), Arena
patent: 4528415 (1985-07-01), Knudsen
patent: 4594447 (1986-06-01), Wilke et al.

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