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Method for the treatment of a catalytic component on a porous metal oxide support for the polymerization of olefins in the gas phase and method of polymerizing olefins

  • US 5,112,785 A
  • Filed: 10/30/1989
  • Issued: 05/12/1992
  • Est. Priority Date: 06/16/1987
  • Status: Expired due to Fees
First Claim
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1. The method of forming a granular catalytic component for use in the polymerization of ethylene or a copolymerization of ethylene and at least one C3 to C12 alpha olefin in a gas-phase comprising impregnating a porous metal oxide support with at least one titanium compound, magnesium compound, and chloride compound, and prepolymerizing ethylene and a monomer mixture of ethylene and at least one C3 to C12 alpha olefin, at least partially in suspension, in the presence of said impregnated porous metal oxide support and least one alkylaluminum compound, of the formula Al(R")c X1d He in which X1 is Cl or R", R" is a C1 to C14 saturated hydrocarbon radical, with o<

  • d<

    1.5;

    o<

    3<

    1, and c+d+e=3, complexed with at least one electron donor, the monomer or monomer mixture being introduced into the reaction during the first hour of prepolymerization at a flow rate equal to or less than 10 NL×

    h-1 ×

    g-1 of catalytic component on the porous metal oxide support.

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