Polymerization process using surface heat treated silica-contain

Details Polymerization process using surface heat treated silica-contain Polymerization process using surface heat treated silica-contain

1982-09-29

1984-02-28

Levin, Stanford M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

502234, 526352, C08F 402, C08F 424

Patent

active

044342802

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.

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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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