Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1993-03-08
1995-04-25
Smith, Edward J.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502115, 502125, 502151, 502105, 502152, 502153, 502119, 526142, 526127, 526141, 526144, 5263485, 526352, 526904, 526906, C08F 4611, C08F 4614, C08F 1000
Patent
active
054098750
ABSTRACT:
A polymer supported catalyst comprises Ziegler-Natta catalysts immobilized on a magnesium-modified polymer support. The catalyst support is prepared by (1) dissolving a carboxyl group-containing polymer in a solvent and precipitating the polymer in a polar non-solvent, (2) wet-grinding the precipitated polymer, and (3) mixing the ground polymer with an organomagnesium compound or a complex of an organomagnesium compound and an organoaluminum compound to give a magnesium-modified polymer support. Optionally, the resulting magnesium-modified support is treated with a halogen-containing silicon compound. The catalysts may be loaded onto the support by reacting the magnesium-modified support with a transition metal compound to form a catalyst constituent, and then combining the catalyst constituent with an appropriate organo-metallic compound. The supported catalyst is highly active and suitable for the polymerization and copolymerization of olefins without substantial contamination of the resulting products with chlorine or metal ions, as is the case with conventional MgCl.sub.2 -supported catalysts.
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Hsu Cheng C.
Sun Lixin
Hicks Richard J.
Queen's University
Smith Edward J.
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