发明授权
- 专利标题: Polyolefin catalysts, production thereof and method of use
- 专利标题(中): 聚烯烃催化剂,其生产方法和使用方法
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申请号: US10370365申请日: 2003-02-18
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公开(公告)号: US06846887B2公开(公告)日: 2005-01-25
- 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
- 代理机构: Madan, Mossman & Sriram, P.C.
- 主分类号: C08F10/00
- IPC分类号: C08F10/00 ; C08F110/02 ; C08F4/654 ; C08F4/655
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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