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Method for producing Philips catalyst for olefin polymerization having improved productivity by particle shape forming method
Method for producing Philips catalyst for olefin polymerization having improved productivity by particle shape forming method
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机译:通过颗粒形状形成方法生产具有提高的生产率的用于烯烃聚合的飞利浦催化剂的方法
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摘要
In a process for producing Phillips catalysts in which an oxidic support material is treated in suspension with a chromium salt solution and subsequently, after removing the solvent, calcined in an oxygen-containing atmosphere at above 300° C., the oxidic support material and/or the catalyst after calcination are/is, according to the present invention, comminuted until a mean particle size of 100 mum has been reached and the proportion of particles having a size of 50 mum is at least 30%, preferably in the range from 40 to 80%. A process for preparing homopolymers or copolymers of ethene in a loop reactor at from 30 to 150° C. under a pressure in the range from 0.2 to 15 MPa in the presence of a catalyst produced by the process of the present invention is also provided.
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