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AssigneeJapan Polypropylene Corporation
InventorsKazuhiro Yamamoto, Kiyoshi Yukawa, Yasuhiro Kashiwagi, Yoichi Maeda
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A large-scale and efficient industrialization of olefin polymerization by metallocene catalysts is realized by, in olefin polymerization by metallocene-based catalysts, increasing catalytic activity and polymerization efficiency to sufficiently bring out the performances of the metallocene catalysts and maintain a stable polymerization reaction. The amount of a halogen-containing compound is controlled so that the gram-atomic amount ratio to a transition metal of a halogen atom in a halogen-containing compound in solvents and materials other than a halogen atom in a catalyst component is 0.8 or less, in manufacturing plants of commercial level in an olefin polymerization by a metallocene catalyst.
A method for effectively producing polyolefin by polymerizing an olefin using a single site catalyst, which comprises controlling an amount of a halogen-containing compound present in a polymerization reaction and not in a catalyst component, where the gram-atomic amount ratio of a halogen atom in the halogen-containing compound to a transition metal in the single site catalyst is 0.8 or less.
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