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Olefin polymerization catalyst composition

  • US 4,771,024 A
  • Filed: 05/07/1987
  • Issued: 09/13/1988
  • Est. Priority Date: 02/28/1986
  • Status: Expired due to Term
First Claim
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1. A solid magnesium halide/titanium halide catalyst component containing no carbonate magnesium compound useful for the polymerization of alphaolefins which has been obtained by(a) heating a carbonated magnesium compound of the formula MgR'"'"'R"xCO2 wherein R'"'"' is an alkoxide or aryloxide group, R" is an alkoxide group, aryloxide group or halogen, and x has a value between about 0.1 and 2.0 to a temperature above 100°

  • C. for a period of time sufficient to cause complete loss of CO2 ;

    (b) contacting the resulting product with a halide of tetravalent titantium in the presence of a halohydrocarbon and an electron donor;

    (c) contacting the resulting halogenated product with a tetravalent titanium halide;

    (d) washing the resulting product to remove unreacted titanium compounds; and

    (e) recovering the solid product.

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