发明名称 |
Process and apparatus for fluid bed polymerization |
摘要 |
In gas phase fluid bed polymerization processes, operation can be achieved over wider ranges of fluidizing gas velocities without incurring undue energy costs by adjusting the pressure drop through the grid below the bed to provide a ratio of pressure drop through the grid to pressure drop through the grid and bed above about 0.15:1. The range of fluidizing gas velocities can enhance the practicality of operating the processes over varying bed heights while reducing the risk of forming deposits of polymer. The processes of the invention are particularly useful to accommodate start-ups, catalyst transitions and shutdowns.
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申请公布号 |
US6262190(B1) |
申请公布日期 |
2001.07.17 |
申请号 |
US19990247414 |
申请日期 |
1999.02.10 |
申请人 |
UNION CARBIDE CHEMICALS & PLASTICS TECHNOLOGY CORPORATION |
发明人 |
JOYCE WILLIAM HELMER |
分类号 |
B01J8/00;B01J8/24;B01J8/44;C08F2/34;C08F10/00;(IPC1-7):C08F2/34 |
主分类号 |
B01J8/00 |
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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