发明名称 |
Method for transitioning from a catalyst to an incompatible catalyst in a gas-phase reactor |
摘要 |
The present invention is a process for transitioning from a first polymerization catalyst system to a second polymerization catalyst system incompatible with the first polymerization catalyst system in a gas-phase reactor. The novel process comprises conducting a first polymerization reaction using a first polymerization catalyst system; stopping the first polymerization reaction; removing the contents of the first polymerization reaction from the reactor while maintaining a substantially closed system; then, in the substantially closed system, introducing a substantially contaminant free seedbed into the reactor; introducing a second feed system and a second catalyst system into the reactor; and conducting a second polymerization reaction.
|
申请公布号 |
US2004127655(A1) |
申请公布日期 |
2004.07.01 |
申请号 |
US20030683711 |
申请日期 |
2003.10.10 |
申请人 |
VEARIEL THOMAS REDDEN;YENETCHI GEORGE VARCELIA;HINDS SANDY CLAY;SINGH DIWAKER;POLCHLOPEK THIERRY |
发明人 |
VEARIEL THOMAS REDDEN;YENETCHI GEORGE VARCELIA;HINDS SANDY CLAY;SINGH DIWAKER;POLCHLOPEK THIERRY |
分类号 |
B01J8/00;B01J8/24;B01J8/26;C08F2/00;C08F2/34;C08F2/38;C08F2/42;C08F10/00;(IPC1-7):C08F2/00 |
主分类号 |
B01J8/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|