Process for producing polyethylenes having a broad molecular weight distribution, and a catalyst system used thereby
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United States of America Patent
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Jun 5, 2001
Grant Date -
N/A
app pub date -
May 3, 1999
filing date -
Jan 26, 1996
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Expired
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Abstract
A process for the polymerization of ethylene and optionally .alpha.-olefins to form ethylene homopolymer or copolymers having a broad molecular weight distribution, comprising polymerization of 100-80 wt. % of ethylene and 0-20 wt. % of comonomer in the presence of two independent, simultaneously present catalysts A and B, wherein catalyst A, deposited on an inorganic support, comprises chromium in a predominantly oxidant state of 2 and catalyst B comprises a bis-cyclopentadienyl chromium compound reacted with an inorganic support.
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