Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1980-02-06
1981-10-13
Dees, Carl F.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252458, 526106, B01J 2108, B01J 2326, B01J 2100
Patent
active
042947243
ABSTRACT:
In accordance with one embodiment of this invention, a silica hydrogel is prepared and dried in the presence of a pore preserving agent after which a titanium compound is anhydrously incorporated therewith. In accordance with the second embodiment of this invention, a silica hydrogel or a silica xerogel is impregnated with an aqueous organic acid solution of a substituted or unsubstituted titanium acetylacetonate. The invention allows the use of conventional drying to produce a silica exhibiting characteristics associated with azeotrope dried titanium-silica for use as a support for chromium catalysts. The resulting catalysts are broadly applicable in the polymerization of olefins and are of particular utility in the slurry polymerization of olefins, particularly predominantly ethylene monomer.
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patent: 3882096 (1975-05-01), Shida et al.
patent: 3887494 (1975-06-01), Dietz
patent: 4041224 (1977-08-01), Hoff et al.
patent: 4053436 (1977-10-01), Hogan et al.
patent: 4119569 (1978-10-01), Dietz
patent: 4169926 (1979-10-01), McDaniel
patent: 4190457 (1980-02-01), McDaniel
patent: 4218345 (1980-08-01), Hoff et al.
Dees Carl F.
Phillips Petroleum Company
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