Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
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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Bailey F. Wallace
Benham Elizabeth A.
Knudsen Ronald D.
McDaniel Max P.
Jolly Lynda S.
Phillips Petroleum Company
Schofer Joseph L.
Wu David
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