Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1993-06-02
1996-04-02
Cross, E. Rollins
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502102, 502113, 502118, 502158, 502170, 502171, 5261231, B01J 3100, C08F 464
Patent
active
055040489
ABSTRACT:
This invention relates to a conventional supported heterogeneous Ziegler-Natta catalyst for the polymerization of olefins. It has been found that adding a lithium compound to a transition metal catalyst component and then adding an organoaluminum co-catalyst and an organosilicon electron donor produces a catalyst which yields polymer with increased molecular weight. The lithium compound is of the general formula LiCp wherein Cp is a cyclopentadienyl or substituted cyclopentadienyl and is preferably lithium cyclopentadienide or lithium indene. Preferably, the molar ratio of lithium compound/transition metal is at least 0.2.
REFERENCES:
patent: 4231948 (1980-11-01), Pez
patent: 4562173 (1985-12-01), Terano et al.
patent: 5096867 (1992-03-01), Canich
patent: 5120867 (1992-06-01), Welborn, Jr.
Bauch Christopher
Shamshoum Edwar S.
Cheairs M. Norwood
Cross E. Rollins
Fina Technology, Inc.
Irzinski E. D.
Wheelington Jim D.
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