Twice-aged porous inorganic oxides, catalysts, and polymerizatio

Details Twice-aged porous inorganic oxides, catalysts, and polymerizatio Twice-aged porous inorganic oxides, catalysts, and polymerizatio

1990-11-13

1992-05-19

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526352, C08F 424

Patent

active

051150530

ABSTRACT:
A silica-titania cogel or silica-titanic-chromium tergel is first aged at a substantially neutral pH, then aged at an alkaline pH, and then spray dried or azeotrope dried to form a xerogel. Optionally, a pore- preserving agent can be added prior to drying. The cogel can be impregnated with a chromium compound. The chromium-containing catalyst is activated by calcination. The activated catalyst can be used as a polymerization catalyst to polymerize mono-1-olefins.

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