Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Organic compound containing
Reexamination Certificate
2005-09-20
2005-09-20
Choi, Ling-Siu (Department: 1713)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Organic compound containing
C502S103000, C502S117000, C502S167000, C502S120000, C502S080000, C526S161000, C526S172000
Reexamination Certificate
active
06946420
ABSTRACT:
The present invention is directed to a coordinating catalyst system comprising at least one pre-catalyst selected from late transition metal bidentate or tridentate ligand containing compounds, at least one support-agglomerate having chromium immobilized thereto (e.g., spray dried silica/clay agglomerate), and optionally at least one organometallic compound in controlled amounts, and methods for preparing the same. The resulting catalyst system exhibits enhanced activity for polymerizing olefins and yields polymer products having very good morphology.
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Denton Dean Alexander
Glemza Rimantas
Shih Keng-Yu
Choi Ling-Siu
Troffkin Howard
W. R. Grace & Co.-Conn
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