METHOD OF PREPARING CATALYST FOR OLEFIN POLYMERIZATION Russian patent published in 1997 - IPC

FIELD: preparation of catalysts for petrochemical processes. SUBSTANCE: catalyst is prepared from a compound that may be represented with one of the following general formulas , where M - metal selected from the group containing titanium, zirconium, and hafnium; (A-Cp) or (Cp)(Cp*), or Cp-A'-Cp and Cp and Cp* - the same or different, are substituted cyclopentadienyl radicals; A' - is covalently bound bridge group containing 4a group element; L is olefin, diolefin, or aryne ligand; X and X', independent, are selected from group containing hydride radicals, hydrocarbon radicals, substituted hydrocarbon radicals, organometalloid radicals, etc. X and X' are linked to each other and simultaneously to metal atom to form a metallocycle in which metal, X, and X' form hydrocarbon cycle, in which metal, X, and X' form hydrocarbon cycle with 3-29 carbon atoms. R is substituent in one of cyclopentadienyl radicals, which is at the same time bonded to metal atom, to a second component containing cation capable to release proton, and to bulky labile anion containing a series of boron atoms and capable to stabilize zirconium cation with formal coordination number 3 and valence +4, this anion being formed through combining the components. The second component is described with one of general formulas: (i) [L′-H](CX)_a(BX′)_mX″b] where L'-H - hydrogen, X, X', and X" are selected independently of each other from the group including hydrogen, halogen, hydrocarbon or substituted hydrocarbon residues, organometalloid residues, etc; a and b are each equal or larger 1; a+b+c is even number from 2 to 8; and m = 5-22; and (ii) [CL′-H][[[(CX₃)_a′(BX₄)_m′(X₅)b]^c′-]₂M^n+d where L'-H is hydrogen, ammonium or substituted ammonium group, phosphonium or substituted phosphonium group wherein up to 3 hydrogen atoms are substituted with hydrocarbon radicals, etc. , M transitional metal, X₃,X₄ and X₅ as above; a' and b', the same or different, are 0 or more than 0, c' is 2 or larger number, and a'+b'+c' is 2,2,6, or 8; m' is 6-12; 2c'-n is at least 1. EFFECT: increased catalytic activity. 4 cl