Catalyst useful for olefin polymerization process

Details Catalyst useful for olefin polymerization process Catalyst useful for olefin polymerization process

1974-07-09

1976-08-31

Dees, Carl F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252458, 252459, B01J 2916, B01J 2900

Patent

active

039780023

ABSTRACT:
An olefin polymerization catalyst comprising a silica xerogel support having a pore volume greater than about 2.0 cc/g, the major portion of which volume is provided by pores having pore diameters ranging from 300 to 600 A and a surface area ranging from 200 to 500 m.sup.2 /g, and having deposited thereon a metal-containing catalytic material, such as chromium oxide, or other metal oxide. Further, a polymerization process utilizing such a catalyst for the preparation of polyolefins having relatively low molecular weights and high melt indexes without loss of catalyst activity, especially a process for the preparation of polymers and copolymers of 1-olefins having a maximum of 8 carbon atoms in the chain and having no branching nearer the double bond than the 4-position, e.g., ethylene polymers.

REFERENCES:
patent: 3050514 (1962-08-01), Cawthon, Jr. et al.
patent: 3281405 (1966-10-01), Hogan
patent: 3349067 (1967-10-01), Hill
patent: 3534110 (1970-10-01), Juquin et al.

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