发明名称 |
Process for transitioning between incompatible catalysts using a substantially contaminant free seedbed |
摘要 |
The present invention is a process for transitioning from a first polymerization reaction to a second polymerization reaction incompatible with the first polymerization reaction in a gas-phase reactor. The novel process comprises conducting multiple polymerization reactions, capturing and storing a substantially contaminant-free polymerization product from each multiple polymerization reaction for use as a selected substantially contaminant-free seedbed in a second polymerization, wherein the polymerization product from each multiple polymerization reaction is rendered substantially contaminant-free by stripping or venting reactants and contaminants and is maintained as substantially contaminant-free by storage under an inert atmosphere.
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申请公布号 |
US2004167299(A1) |
申请公布日期 |
2004.08.26 |
申请号 |
US20030720511 |
申请日期 |
2003.11.24 |
申请人 |
SAVATSKY BRUCE JON;TILSTON KELLI LYNNE;VEARIEL THOMAS REDDEN |
发明人 |
SAVATSKY BRUCE JON;TILSTON KELLI LYNNE;VEARIEL THOMAS REDDEN |
分类号 |
C08F;C08F2/00;C08F2/34;C08F2/38;C08F2/42;C08F4/42;C08F10/00;(IPC1-7):C08F2/38 |
主分类号 |
C08F |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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