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1. 发明公开

EP3441406A1 SOLID PMAO COMPOSITION AND METHOD FOR PRODUCING SAME 审中-实审
公开(公告)号：EP3441406A1
公开(公告)日：2019-02-13
申请号：EP17779144.9
申请日：2017-04-04
申请人： Tosoh Finechem Corporation
发明人： KAJI Eiichi , YAMANE Takeo
IPC分类号： C08F4/6592 , C08F10/00
摘要： The present invention is a method for producing a solid PMAO composition, the method comprising step (a) through step (c). Step (a): an aromatic hydrocarbon solution of TMAL and PMAO containing units from general formula (I) is heated, and a solid PMAO composition containing PMAO and TMAL is precipitated. At least 70% of the PMAO and TMAL in terms of aluminum precipitates. Step (b): an aromatic hydrocarbon solution of TMAL and PMAO containing units represented by general formula (I) is added to a solution containing the resulting solid PMAO composition. Step (c): the resulting solution is heated, and a solid PMAO composition is precipitated. At least 70% of the PMAO and TMAL in terms of aluminum precipitates. The median diameter d2 of the solid PMAO composition produced in step (c) is greater than the median diameter d1 of the solid PMAO composition produced in step (a), and the heating temperature in step (c) is the same as or different from the heating temperature in step (a).

-[(Me)AlO] n - (I)

In the formula, n represents an integer of 10-50. According to the present invention, a high-activity solid PMAO composition is obtained even under rigorous conditions in which the grain diameter is relatively high and close to the actual reaction process. An olefin polymerization catalyst in which this solid PMAO composition is used and a method for producing an olefin polymer in which this catalyst is used are provided.

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