| 摘要 |
An ethylene polymerization catalyst comprising: (i) a complex having at least one cation and at least one anion wherein the cation is V2X3(ED)m and the anion is MaClbRc wherein X = Cl, Br, or I, or mixtures thereof, ED = an electron donor selected from the group consisting of ethers, phosphines, ketones, isocyanides, and esters, each electron donor having 2 to 20 carbon atoms, M = Al or Mg, R = an alkyl radical having 1 to 14 carbon atoms, m = an integer from 3 to 6, a = 1 or 2, b = 2 when M = Al and 3 when M = Mg, c = 2 when M = Al and 0 when M = Mg, said complex impregnated on an inorganic oxide support; (ii) a halocarbon promoter; and (iii) a hydrocarbyl aluminum cocatalyst. |
