Process for the polymerization of propylene

Process for the polymerization of propylene

  • CN 104,870,491 A
  • Filed: 12/19/2013
  • Published: 08/26/2015
  • Est. Priority Date: 12/20/2012
  • Status: Active Application
First Claim
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1. prepare polyacrylic method, described polypropylene hasThe molecular weight of-450,000-950,000,The molecular weight distribution of-3-6,-the 7-14dg/min that records with the load of 21.6 kilograms at 230 DEG C or the melt flow rate (MFR) of 0.05-2dg/min recorded with the load of 2.16 kilograms at 230 DEG C, andThe xylene soluble content of-2-6 % by weight,Described method is undertaken by following:

  • the volume ratio of H2 and propylene is under the condition of the highest 0.0020 wherein, under the existence of polymerizing catalyst, be polypropylene not carrying out converting propylene in prepolymerized situation, wherein said catalyzer comprises catalyst component and promotor, and wherein said catalyst component obtains by the following method;

    wherein order has formula Mg (OAlk) xcl ycompound under the existence of inertia dispersion agent, contact to obtain intermediate reaction product with four titan-alkoxides and/or alcohol, in above formula, x is greater than 0 and is less than 2, y equals 2-x, and each Alk represents alkyl independently, and wherein said intermediate reaction product contacts with titanium tetrachloride under the existence of internal electron donor.

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