| 摘要 |
A process for polymerizing an alpha -olefin comprising contacting the olefin in liquid phase at a temperature of about 120 DEG to about 320 DEG C. with a catalyst comprising a component (A) and an organometal component (B), the component (A) being produced by reacting a hydrocarbon-soluble organomagnesium component (i) of the formula, M alpha MgRp1Rq2Xr1Xs2Dt wherein alpha , p, q, r and s each independently is 0 or a number greater than 0, t is a number greater than 0, p+q+r+s=m alpha +2, O</=(r+s)/( alpha +1)<2, m is the valance of M, M is a metal of the 1st to 3rd groups of the Periodic Table, R1 and R2 each independently is a hydrocarbon group having 1 to 20 carbon atoms, X1 and X2 each independently is a hydrogen atom, a halogen atom or an organic electronegative group containing O, N, or S, D is an electron donor, with (ii) a halide of boron, silicon, germanium, tin, phosphorus, antimony, bismuth or zinc, and contacting the product of (i)+(ii) with (iii) a compound of titanium and/or a compound of vanadium at a concentration of titanium plus vanadium of at most about 2 mols per liter of the inert reaction solvent, the atomic ratio of Mg/(Ti+V) in (A) being about 3 to about 500.
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