METHOD OF PREPARING CATALYST AND ETHYLENE POLYMERIZATION PROCESS USING THEREOF Russian patent published in 2007 - IPC B01J37/04 B01J32/00 C08F10/02 C08F2/18 C08F4/64 C08F4/654 C08F4/656 

FIELD: polymerization processes and catalysts.

SUBSTANCE: invention relates to preparing supported titanium-magnesium catalyst for production of polyethylene and superhigh-molecular weight polyethylene via suspension polymerization of ethylene in hydrocarbon solvent. Invention provides a method for preparing supported ethylene polymerization catalyst containing titanium compound on magnesium-containing support, which is prepared by interaction of dissolved organomagnesium compound having following composition: MgPh₂·nMgCl₂·mR₂O, wherein R represents butyl or isoamyl, n=0.37-0.7, and m=1-2, with compounds inducing conversion of organomagnesium compound into solid magnesium-containing support. As such compounds, there is used a composition including product of reaction of alkylsilane R'_kSi_4-k, wherein R is alkyl or phenyl and k=1, 2, with silicon tetraalkoxide Si(OEt)₄ at molar ratio 2-4, respectively, and a dialkylaromatic ether. Catalyst is characterized by high activity at temperatures ≤60°C and particle size within a range 5.5 to 3.0 μm. Catalyst allows a polymer powder with average particle size ≤150 μm, narrow particle size distribution, and high loose density (≥250 g/L) to be obtained.

EFFECT: enhanced low-temperature catalyst activity and selectivity.

3 cl, 1 tbl, 15 ex