HIGH-ACTIVITY CATALYST FOR POLYMERIZATION OF OLEFINS, METHOD OF PREPARATION THEREOF, AND METHOD FOR PREPARATION OF POLYOLEFIN Russian patent published in 1999 - IPC

FIELD: polymerization catalysts. SUBSTANCE: preparation of catalyst by interaction of tetraneophilezirconium in hydrocarbon with IIa, IIIa, IVa, and IVb group metal oxides with partly hydroxylated surface, or mixture of oxides, is distinguished by that tetraneophilezirconium preliminarily recrystallized from liquid hydrocarbon is used, catalyst is hydrogenated, if necessary, and then partially or completely separated from by-products, basically from tert-butylbenzene, involving washing with liquid inert hydrocarbon, or by any mechanical means, or by evaporation (preferably, in vacuum), or by combination of all these ways to give catalyst containing 1.66-1.72 wt % zirconium. EFFECT: increased catalytic activity. 8 cl, 2 tbl, 25 ex