发明授权
- 专利标题: Process for control of polymer fines in a gas-phase polymerization
- 专利标题(中): 在气相聚合中控制聚合物细粉的方法
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申请号: US10553689申请日: 2004-04-07
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公开(公告)号: US07504464B2公开(公告)日: 2009-03-17
- 发明人: Stephanie M. Whited , Michael D. Turner , Michael A. Kinnan , Robert J. Jorgensen
- 申请人: Stephanie M. Whited , Michael D. Turner , Michael A. Kinnan , Robert J. Jorgensen
- 申请人地址: US TX Houston
- 专利权人: Univation Technologies, LLC
- 当前专利权人: Univation Technologies, LLC
- 当前专利权人地址: US TX Houston
- 代理商 Leandro Arechederra, III
- 国际申请: PCT/US2004/010572 WO 20040407
- 国际公布: WO2005/012371 WO 20050210
- 主分类号: C08F4/642
- IPC分类号: C08F4/642
摘要:
A gas phase polymerization process comprising: (1) preparing a solution of a catalyst precursor comprising a mixture of magnesium and titanium compounds, an electron donor and a solvent; (2) adding a filler to the solution from step (1) to form a slurry; (3) spray drying the slurry from step (2) at a temperature of 100 to 140° C. to form a spray dried precursor, (4) slurring the spray dried precursor from step (3) in mineral oil, (5) partially or fully pre-activating the catalyst precursor by contacting the slurry of (4) with one or more Lewis Acids, and (6) transferring the partially or fully activated precursor from step (5) into a gas phase reactor in which an olefin polymerization reaction is in progress.