| 摘要 |
PURPOSE:To produce a polyolefin in a high catalyst efficiency, by polymerizing an olefin by using a catalyst comprising a specified inorganic oxide support, a specified organic transition metal compound a specified water-modified organoaluminum compound. CONSTITUTION:An olefin (e.g., propylene) is (co)polymerized in the presence of a solid product obtained by contacting a fine particulate porous inorganic oxide (e.g., alumina) free of adsorbed water and having surface reactive hydroxyl groups with an organic transition metal compound of formula I [wherein M is a Group IVA-VIA transition metal, R<1> is a (substituted) hydrocarbon group, X is a halogen, p has a value of from 2 to the highest valence of metal M, and q has a value of from 0 to the valance of metal M minus 2], e.g., tetrabenzylzirconium, and a water-modified organoaluminum compound prepared by water-modifying a trialkylaluminum compound of formula II (wherein R<2> is a 1-10C alkyl), e.g., trimethylaluminum. It is possible to obtain a polyolefin in high yields and markedly improved catalyst efficiency.
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