Polymerization catalyst and method of preparing the same

Details Polymerization catalyst and method of preparing the same Polymerization catalyst and method of preparing the same

1981-07-02

1984-09-18

Dees, Carl F.

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

Catalyst or precursor therefor

Silicon containing or process of making

502237, B01J 2326, B01J 2108

Patent

active

044725310

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. A suitable hydrogel is treated with a water miscible organic liquid to substantially displace the aqueous phase and the resultant organogel with or without intermediate drying is then impregnated by a concentrated aqueous solution of a metal salt decomposable to the oxide on subsequent calcination. Also disclosed is a polymerization process utilizing such a catalyst 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: 3652215 (1972-03-01), Aboutboul et al.
patent: 3867306 (1975-02-01), Witt et al.
patent: 4037042 (1977-09-01), Mueller-Tamm et al.
patent: 4246139 (1981-01-01), Witt
patent: 4299731 (1981-11-01), McDaniel et al.

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