Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1988-10-27
1990-06-26
Garvin, Patrick P.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502117, 502120, 526129, C08F 464, C08F 468
Patent
active
049372173
ABSTRACT:
This invention relates to a process for preparing a supported metallocene alumoxane catalyst for use in the polymerization of olefins. The invention particularly relates to the use of silica gel containing from about 6 to about 20 percent by weight adsorbed water as the catalyst support material. It has been found that such silica gel may be safely added to an trialkyl aluminum solution, preferably a mixed trimethylaluminum-triethylaluminum solution, to form by direct reaction with the adsorbed water content of the silica gel catalyst support material the alumoxane component of the catalyst system. An alumoxane coated silica gel is formed to which a metallocene may be added and the resulting material dryed to free flowing powder. The dry free flowing powder may then be used as a supported metallocene alumoxane catalyst complex for gas phase or liquid phase polymerization of olefins.
REFERENCES:
patent: 4808561 (1989-02-01), Welborn
Exxon Chemical Patents Inc.
Garvin Patrick P.
Kurtzman M. B.
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