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Process for Preparing a Catalyst Component for Propylene Polymerization

  • US 20090306315A1
  • Filed: 05/23/2007
  • Published: 12/10/2009
  • Est. Priority Date: 05/24/2006
  • Status: Active Grant
First Claim
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1. A process for preparing a polymerization catalyst component comprising the steps ofi) contacting a compound R4zMgX2-z wherein R4 is an organic group, X is a halide, and z is larger than 0 and smaller than 2, with an alkoxy- or aryloxy-containing silane compound to give a solid magnesium-containing compound of formula Mg(OR1)xCl2-x wherein x is larger than 0 and smaller than 2, and each R1, independently, represents an alkyl group;

  • ii) contacting the solid Mg(OR1)xCl2-x with at least one activating compound selected from the group formed by internal electron donors and compounds of formula M(OR2)v-w(R3)w, wherein M can be Ti, Zr, Hf, Al or Si, each R2 and R3, independently, represent an alkyl, alkenyl or aryl group, v is the valency of M and w is smaller than v, in the presence of an inert dispersant to give an intermediate reaction product, andiii) contacting the intermediate reaction product with a halogen-containing Ti-compound.

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