发明名称 |
Catalyst system and process |
摘要 |
Methods of making supported chromium catalyst systems and processes of polymerizing ethylene using the supported chromium catalyst systems are disclosed. A method of forming a catalyst system in a polymerization reactor includes contacting a supported chromium catalyst and a metal alkyl cocatalyst by cofeeding the catalyst and cocatalyst to the reactor or feeding the catalyst and cocatalyst separately to the reactor, to form a catalyst system. The catalyst and cocatalyst are not pre-contacted prior to the feeding or cofeeding step. The catalyst system can be contacted with ethylene and optional alpha-olefin comonomer to form polyethylene.
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申请公布号 |
US7632901(B2) |
申请公布日期 |
2009.12.15 |
申请号 |
US20030456604 |
申请日期 |
2003.06.06 |
申请人 |
EXXONMOBIL CHEMICAL PATENTS INC. |
发明人 |
KATZEN STANLEY J.;LIN ZERONG;SPECA ANTHONY N.;KENDRICK JAMES A.;ROGER SCOTT T. |
分类号 |
C08F4/52;C08F2/00;C08F4/58;C08F4/69;C08F10/00;C08F210/16;C08F210/18 |
主分类号 |
C08F4/52 |
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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