| 摘要 |
Ethylene and alpha-olefins are homopolymerized or copolymerized with another olefin monomer in the presence of a catalyst system comprising an organo metal cocatalyst and a titanium-containing catalyst component, said titanium-containing catalyst component being obtained by reacting together a porous particulate material, an organic magnesium compound, a halogen agent other than Cl2, Br2 and an interhalogen compound, titanium tetrachloride and Cl2, Br2, an interhalogen or mixtures thereof.
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