Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1998-04-29
2000-03-07
Bell, Mark L.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502104, 502103, 502117, 502152, 502 5, 502522, 556187, 556182, 556179, 556175, B01J 3100, B01J 3700, B01J 3739, C08F 402, C08F 460
Patent
active
06034024&
ABSTRACT:
A process is described which comprises heating a methylalumoxane solution in an aromatic hydrocarbon solvent at a temperature of at least 35.degree. C. for at least 0.5 hour in an inert, dry atmosphere such that the resulting heat-treated composition provides, in a supported metallocene catalyst produced using the heat-treated composition, increased activity as compared to the same supported metallocene catalyst produced in the same way except for using a portion of the methylalumoxane solution that has not been heat-treated. Before the heating the methylalumoxane of the solution contains from about 5 to about 35 mole percent unreacted trimethylaluminum, and was formed by partial hydrolysis of trimethylaluminum with free water in an organic solvent.
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Burt Edward A.
Diefenbach Steven P.
Krzystowczyk Niomi L.
Albemarle Corporation
Bell Mark L.
Pasterczyk P.
Pippenger Philip M.
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