| 摘要 |
A process for preparing a Ziegler-Natta catalyst, which process comprises: (i) mixing in a hydrocarbon solvent a dialkyl magnesium compound of general formula MgR<1>R<2> with a chlorinating agent soluble in the hydrocarbon solvent under conditions to precipitate controlledly a magnesium dichloride derivative, wherein R<1> and R<2> are each independently a C1 to C10 alkyl group, and the chlorinating agent is obtainable from the reaction between an alcohol of general formula R<3>OH and an alkyl aluminium chloride of general formula R<4>nAlCl3-n, in which R<3>OH is a cyclic or branched C3 to C20 alcohol, each R<4> is independently a C2 to C8 alkyl and n is 1 or 2; (ii) removing unwanted reducing species by washing or reaction; and (iii) titanating the magnesium dichloride derivative with a chlorinated titanium compound to produce the Ziegler-Natta catalyst.
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