发明名称 |
ENHANCED CONDENSED MODE OPERATION IN METHOD OF PRODUCING POLYOFEFINS WITH CHROMIUM BASED CATALYSTS |
摘要 |
A gas phase polymerization process for producing a polyethylene polymer including polymerizing ethylene and optionally at least one α-olefin comonomer in a fluidized bed reactor under condensed mode operating conditions using a Cr+6-based supported catalyst and a catalyst initiation enhancing agent is provided. The catalyst initiation enhancing agent is an aluminum alkyl solution that is present in the fluidized bed reactor at effective Al/Cr ratios between 0.2 to 1.5. A catalyst initiation enhancing system including at least one aluminum alkyl and at least one hydrocarbon solvent wherein the aluminum alkyl is present in the solvent at concentrations of less than about 0.03 molar.
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申请公布号 |
US2011009577(A1) |
申请公布日期 |
2011.01.13 |
申请号 |
US20100833768 |
申请日期 |
2010.07.09 |
申请人 |
UNION CARBIDE CHEMICALS & PLASTICS TECHNOLOGY LLC |
发明人 |
JORGENSEN ROBERT J. |
分类号 |
C08F4/622 |
主分类号 |
C08F4/622 |
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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