Surface heat treatment of silica-containing catalyst base

Details Surface heat treatment of silica-containing catalyst base Surface heat treatment of silica-containing catalyst base

1981-09-17

1983-03-29

Dees, Carl F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252458, B01J 2106, B01J 2326

Patent

active

043783066

ABSTRACT:
A silica base for a chromium olefin polymerization catalyst is subjected to a high temperature treatment as for instance by passing the silica through a flame in order to alter the surface characteristics. The chromium can be present during the flame treatment or added later. The result is a catalyst capable of giving a broader molecular weight distribution polymer which is of particular value with the silica-titania coprecipitated catalyst used in slurry olefin polymerization.

REFERENCES:
patent: 2488150 (1949-11-01), Walden et al.
patent: 3132125 (1960-09-01), Schwander et al.
patent: 3264226 (1966-08-01), Johnson
patent: 3281405 (1966-10-01), Hogan
patent: 3446754 (1969-05-01), Solvik et al.
patent: 3485771 (1966-12-01), Horvath
patent: 3887494 (1975-06-01), Dietz
patent: 3959178 (1976-05-01), Hogan

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