ETHYLENE POLYMERIZATION AND COPOLYMERIZATION CATALYST, METHOD OF PREPARING SOLID CATALYST COMPONENT, AND A METHOD FOR PRODUCTION ULTRAHIGH-MOLECULAR WEIGHT POLYETHYLENE

FIELD: polymerization catalyst and polymer production. ^ SUBSTANCE: invention relates to preparation of high-activity catalyst deposited on solid support and designed for suspension polymerization of ethylene and copolymerization of ethylene with alpha-olefins, in particular, for production of ultrahigh-molecular weight polyethylene. Catalyst according to invention comprises organoaluminum compound (40-200 wt parts) and solid component (1 wt part) containing 12-15% catalytically active titanium compounds and 85-88% magnesium dichloride support prepared by interaction of magnesium metal, ethanol, aluminum, silicon, and titanium compounds, said solid component being represented by particles containing titanium, magnesium, chlorine, aluminum, and silicon at atomic ratio between 1.0:6:16:0.07:0,02 and 1:7:18:0.06:0.01, respectively. Described are also preparation of solid catalyst component, and (co)polymerization of ethylene at temperature between 0 and 100C and pressure between 0.1 and 5.0 MPa. Catalyst according to invention allows obtaining polyethylene with elevated molecular weight under high polymer yield conditions, which minimizes time required for preparation of homogenous spinning solutions in the gel formation process and minimizes degree of degradation of dissolved polymer properties. ^ EFFECT: increased molecular weight and yield of polyethylene . ^ 8 cl, 1 dwg, 3 tbl, 26 ex