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Process for producing polymers

  • US 20020007023A1
  • Filed: 07/19/2001
  • Published: 01/17/2002
  • Est. Priority Date: 05/18/1998
  • Status: Active Grant
First Claim
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1. A process to produce a composition of matter, said process comprising contacting an organometal compound, a treated solid oxide compound, and an organoaluminum compound to produce said composition, wherein said composition consists essentially of a post-contacted organometal compound, a post-contacted treated solid oxide compound, and optionally, a post-contacted organoaluminum compound, and wherein said composition can polymerize ethylene into a polymer with an activity greater than a composition that uses the same organometal compound, and the same organoaluminum compound, but uses untreated Ketjen grade B alumina instead of said treated solid oxide compound, and wherein said organometal compound has the following general formula(X1)(X2)(X3)(X4)M1wherein M is selected from the group consisting of titanium, zirconium, and hafnium, and wherein (X1) is independently selected from the group consisting of cyclopentadienyls, indenyls, fluorenyls, substituted cyclopentadienyls, substituted indenyls, and substituted fluorenyls, and wherein said substituents on said substituted cyclopentadienyls, substituted indenyls, and substituted fluorenyls, are selected from the group consisting of aliphatic groups, cyclic groups, combinations of aliphatic and cyclic groups, and organometallic groups, and hydrogen;

  • and wherein (X3) and (X4) are independently selected from the group consisting of halides, aliphatic groups, cyclic groups, combinations of aliphatic and cyclic groups, and organometallic groups, and wherein (X2) is selected from the group consisting of Group OMC-I or Group OMC-II, and wherein said organoaluminun compound has the following general formula.Al(X5)n(X6)3−

    n
    wherein (X5) is a hydrocarbyl having from 1-20 carbon atoms, and wherein (X6) is a halide, hydride, or alkoxide, and wherein “

    n”

    is a number from 1 to 3 inclusive.

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