发明名称 |
Multistage method for manufacturing polyolefins |
摘要 |
The present invention provides a method for substantially continuously polymerizing olefins comprising: introducing into a first reaction zone a fresh olefin polymerization catalyst; contacting said fresh olefin polymerization catalyst in said first reaction zone with a first vent mixture at a first feed rate and under conditions sufficient to form and avoid melting a polyolefin, wherein first vent mixture comprises unreacted olefins and a diluent vented from a second reaction zone; withdrawing a vent product of unreacted olefins and diluent from said first reaction zone; withdrawing from said first reaction zone a first product mixture comprising said catalyst and said polyolefin; passing said first product mixture to said second reaction zone; contacting said first product mixture in said second reaction zone with a second vent mixture at a second feed rate and under conditions sufficient to form and avoid melting said polyolefin, wherein said second vent mixture comprises a material selected from the group consisting of a fresh feed and a mixture comprising unreacted olefins and diluent from a third reaction zone; and, withdrawing from said second reaction zone a second product mixture comprising said catalyst and said polyolefin. |
申请公布号 |
ZA9711645(B) |
申请公布日期 |
1999.02.16 |
申请号 |
ZA19970011645 |
申请日期 |
1997.12.29 |
申请人 |
EXXON CHEMICAL PATENTS INC. |
发明人 |
RUSSELL JOHN KOVEAL;JAMES JOHN MCALPIN;JEFFREW LAWRENCE BRINEN |
分类号 |
B01J19/24;C08F2/00;C08F2/01;C08F2/06;C08F10/00 |
主分类号 |
B01J19/24 |
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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