Titanium impregnated silica-chromium catalysts

Details Titanium impregnated silica-chromium catalysts Titanium impregnated silica-chromium catalysts

1980-02-06

1981-10-20

Dees, Carl F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252451, 526106, 526107, B01J 2106, B01J 2326

Patent

active

042960010

ABSTRACT:
In accordance with a first embodiment of this invention, a silica xerogel is aqueously impregnated with a titanium compound which is resistant to hydrolysis. In accordance with a second embodiment of this invention, a silica hydrogel containing a titanium compound resistant to hydrolysis is dried. In this embodiment, the hydrogel preferably also contains a pore preserving agent. This invention makes possible the use of aqueous impregnation of titanium and conventional drying techniques to give a catalyst having characteristics associated with azeotrope dried silica-titanium coprecipitated catalyst. The catalysts of this invention are useful in olefin polymerization processes, particularly in the polymerization of predominantly ethylene monomer systems under slurry conditions.

REFERENCES:
patent: 3622521 (1971-11-01), Hogan et al.
patent: 3882096 (1975-05-01), Shida et al.
patent: 3887494 (1975-06-01), Dietz
patent: 3970613 (1976-07-01), Goldie et al.
patent: 4041224 (1977-08-01), Hoff et al.
patent: 4169926 (1979-10-01), McDaniel
patent: 4218345 (1980-08-01), Hoff et al.

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