发明授权
US07365138B2 Pretreated and prepolymerized polyolefin catalyst, production thereof and method of use
有权
预处理和预聚合的聚烯烃催化剂，其生产方法和使用方法
- 专利标题： Pretreated and prepolymerized polyolefin catalyst, production thereof and method of use
- 专利标题（中）： 预处理和预聚合的聚烯烃催化剂，其生产方法和使用方法
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申请号： US11031587申请日： 2005-01-07
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公开(公告)号： US07365138B2公开(公告)日： 2008-04-29
- 发明人: Steven D. Gray , Tim J Coffy , Edwar S. Shamshoum , Hong Chen
- 申请人： Steven D. Gray , Tim J Coffy , Edwar S. Shamshoum , Hong Chen
- 申请人地址： US TX Houston
- 专利权人： Fina Technology, Inc.
- 当前专利权人： Fina Technology, Inc.
- 当前专利权人地址： US TX Houston
- 代理商 Tenley R. Krueger
- 主分类号： C08F4/654
- IPC分类号： C08F4/654
摘要：
A method of modifying a Ziegler-Natta type polyolefin catalyst comprises contacting the Ziegler-Natta catalyst with olefin monomer to form a prepolymerized catalyst. The prepolymerized catalyst can comprise a reduced number of catalyst particles having a size of 40 microns or less. The prepolymerized catalyst can be used in a polymerization process to produce polymer fluff particles with a reduced number of polymer fluff fines than the Ziegler-Natta type catalyst.
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