Polymerization with titanium impregnated silica-chromium catalys

Details Polymerization with titanium impregnated silica-chromium catalys Polymerization with titanium impregnated silica-chromium catalys

1981-05-20

1982-08-17

Levin, Stanford M.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252451, 252458, 526106, 526107, 526352, C08F 402, C08F 424

Patent

active

043450555

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: 3780011 (1973-12-01), Pullukat et al.
patent: 3882096 (1975-05-01), Shida et al.
patent: 3887494 (1975-06-01), Dietz
patent: 3900457 (1975-08-01), Witt
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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