Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1993-03-30
1996-10-01
Caldasola, Glenn
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502104, 502128, 502134, 502103, B01J 3100
Patent
active
055610927
ABSTRACT:
This invention is for a catalyst system comprising a neutral metallocene compound, an aluminum alkyl and a Lewis acid. The Lewis acid must be of sufficient acidity to ionize a neutral metallocene compound to form a cationic metallocene catalyst. The ligands of the Lewis acid should not be reactive with the metallocene cation. Any metallocene catalyst compound having two cyclopentadienyl rings, substituted or unsubstituted, attached to a transition metal which can be ionized by a Lewis acid would be useful in this invention. The invention is also for the process of making the catalyst system and the process for using the catalyst system in polymerization of olefins. The metallocene is contacted with the Lewis acid. The aluminum alkyl is contacted with the olefin. The two mixtures are contacted with each other under polymerization conditions.
REFERENCES:
patent: 5153157 (1992-10-01), Hlatky et al.
patent: 5155080 (1992-10-01), Elder et al.
patent: 5162278 (1992-11-01), Razavi
patent: 5387568 (1995-02-01), Ewen et al.
Elder Michael J.
Ewen John A.
Caldasola Glenn
Cheairs M. Norwood
Fina Technology, Inc.
Irzinski E. D.
Wheelington Jim D.
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