Olefin polymerization catalysts and preparation method

Details Olefin polymerization catalysts and preparation method Olefin polymerization catalysts and preparation method

1990-05-07

1991-12-17

Garvin, Patrick P.

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

Catalyst or precursor therefor

Halogen or compound containing same

502234, 502236, 502237, 502239, 502242, 502256, C08F 464

Patent

active

050735314

ABSTRACT:
Sodium-free olefin polymerization catalysts having high polymerization activities and methods of preparing such catalysts are provided. A hydrolyzable silicate ester and a hydrolyzable acid-generating chromium compound are combined with water and an organic solvent whereby a hydrolysis reaction solution is formed comprising silica and chromium. Sufficient acid-neutralizing gelling agent is added to the solution to form a gelled silica-chromium catalyst and the catalyst is aged to stabilize its structure. Water and solvent are removed from the catalyst and the catalyst is activated.

REFERENCES:
patent: 3979215 (1976-09-01), Emblem et al.
patent: 3998996 (1976-12-01), Toth
patent: 4006175 (1977-02-01), Termin et al.
patent: 4018816 (1977-04-01), Onoda et al.
patent: 4206297 (1980-06-01), Hoff et al.
patent: 4301034 (1981-11-01), McDaniel
patent: 4339559 (1982-07-01), McDaniel

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