发明名称 |
Methods of activating chromium catalysts |
摘要 |
New methods for activating chromium catalysts for polymerization processes decrease the amount of time required for activation and increase catalyst activity. Rapid heating to a first temperature is followed by a first hold period before heating to a higher second temperature and maintaining the second temperature for a second hold period. In one aspect, the overall activation process takes less than 10 hours. |
申请公布号 |
US7981832(B2) |
申请公布日期 |
2011.07.19 |
申请号 |
US20090565559 |
申请日期 |
2009.09.23 |
申请人 |
CHEVRON PHILLIPS CHEMICAL COMPANY LP |
发明人 |
MCDANIEL MAX P.;BENHAM ELIZABETH A. |
分类号 |
B01J20/34;B01J21/20;B01J23/26;B01J23/90;B01J25/04;B01J27/28;B01J29/90;B01J31/40;B01J37/08;B01J38/00;B01J38/02;B01J38/04;B01J38/20;B01J38/42;C08F4/24;C08F10/00;C08F10/02;C08F110/02 |
主分类号 |
B01J20/34 |
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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