C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
252/100, 402/631
C08F 10/00 (2006.01) C08F 4/69 (2006.01) C08F 10/02 (2006.01) C08F 110/02 (2006.01)
Patent
CA 1292734
Abstract of the Disclosure The catalyst system is produced by first forming a chromium catalyst on a predominantly silica support, activating in an oxygen- containing ambient and thereafter subjecting the thus activated composition to carbon monoxide reduction. The resulting reduced supported chromium catalyst composition is then precontacted with a cocatalyst selected from trialkyl boron compounds and dialkyl aluminum alkoxide compounds, preferably triethyl borane and thereafter contacted with ethylene. This results in a catalyst system which produces comonomer in situ so as to give tough, flexible ethylene copolymers from an essentially pure ethylene feed.
531796
Boggs Elizabeth A.
Hsieh Eric T.
Klendworth Douglas
Mcdaniel Max P.
Norwood Donald D.
Osler Hoskin & Harcourt Llp
Phillips Petroleum Company
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