Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymerizing in two or more physically distinct zones
Patent
1994-04-01
1995-08-15
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymerizing in two or more physically distinct zones
526 66, 526 78, 526116, 525 53, C08F 234
Patent
active
054420180
ABSTRACT:
A process for producing polyethylene having a broad molecular weight distribution is provided, in which ethylene and optionally a comonomer are contacted in two reactors connected in series, one reactor containing a titanium-based catalyst and the other reactor containing a vanadium-based catalyst and a halohydrocarbon promoter, or alternatively, both reactors containing a mixed metal catalyst comprising both titanium and vanadium. In the latter case, the halohydrocarbon promoter is present in only one of the reactors to activate the vanadium sites of the catalyst and deactivate the titanium sites of the catalyst simultaneously.
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Cann Kevin J.
Hwu Mark C.
Karol Frederick J.
Marcinkowsky Arthur E.
Nicoletti James W.
Bresch S. R.
Hegedus S. H.
Schofer Joseph L.
Union Carbide Chemicals & Plastics Technology Corporation
Weber Tom
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