Olefin polymerization catalyst
OwnerRinaldo Schiffino, Alison Margaret Anne Bennettinventors
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Abstract
An olefin polymerization catalyst component is prepared by making a solution of a transition metal complex of a selected tridentate ligand, adsorbing the complex onto a silica or silica-alumina support, and separating the solution from the supported transition metal complex component, which is storage stable. Olefin polymerizations with this component may be carried out with high catalyst productivity using cocatalysts such as trialkylaluminum compounds.
Claims17
A process for the preparation of a supported polymerization catalyst component, comprising the steps of:
- (a) dissolving a transition metal complex of a 2,6-pyridinedicarboxaldehydebisimine or a 2,6-diacylpyridinebisimine in a solvent to form a solution;
- (b) contacting said solution with a support which is an unmodified silica or a silica-alumina for a sufficient amount of time to allow at least part of said metal complex to be adsorbed onto said support;
- and
- (c) optionally separating said solution and solvent from said support;
- provided that substantially no activator is present during steps (a), (b) and (c).
A process for the polymerization of one or more polymerizable olefins, comprising the steps of:
- (a) dissolving a transition metal complex of a 2,6-pyridinedicarboxaldehydebisimine or a 2,6-diacylpyridinebisimine in an organic solvent to form a solution;
- (b) contacting said solution with a support, which is a silica or a silica-alumina, for a sufficient amount of time to allow at least part of said metal complex to be adsorbed onto said support, thereby forming a supported catalyst component;
- (c) optionally separating said solution and solvent from said supported catalyst component;
- and
- (d) contacting, under polymerization conditions, said supported catalyst component with said one or more polymerizable olefins and one or more activators,
- provided that substantially no activator is present during steps (a), (b) and (c).
Dependencies are inferred from the claim text.