发明名称 |
Process for controlling the MWD of a broad/bimodal resin in a single reactor |
摘要 |
A make-up catalyst of at least one metallic component of a bimetallic catalyst component is used in conjunction with a bimetallic catalyst to control the proportion of weight fractions in broad or bimodal molecular weight distribution olefin resin product. The bimetallic catalyst which is formed with at least one metallocene of a transition metal, produces broad or bimodal molecular weight distribution polyolefin resin whose composition depends on the ratio of the concentration of the two catalyst components producing the HMW/LMW components. The make-up catalyst consisting of a single metal component is added in proportion necessary to make-up the deficiencies in the amount of the HMW/LMW component. The type of make-up catalyst added depends on whether increase of the HMW or LMW component produced by the bimetallic catalyst is sought.
|
申请公布号 |
US6410474(B1) |
申请公布日期 |
2002.06.25 |
申请号 |
US19970814526 |
申请日期 |
1997.03.10 |
申请人 |
EXXONMOBIL OIL CORPORATION |
发明人 |
NOWLIN THOMAS E.;SCHREGENBERGER SANDRA D.;SHIRODKAR PRADEEP P.;TSIEN GRACE O. |
分类号 |
C08F4/642;B01J31/12;B01J31/14;B01J31/16;B01J31/22;C08F4/02;C08F4/60;C08F4/658;C08F4/659;C08F10/00;(IPC1-7):B01J31/00;B01J37/00 |
主分类号 |
C08F4/642 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|