发明名称 |
PREPARATION OF POLYMERIZATION CATALYST ACTIVATORS UTILIZING INDOLE-MODIFIED SILICA SUPPORTS |
摘要 |
A process for polymerizing propylene is provided. The process comprises contacting propylene and optionally one or more monomers with a catalyst system comprising a bis-indenyl Group 4 metallocene compound supported on silica, the silica treated with one or more organoaluminum compounds and one or more heterocyclic compounds, under slurry conditions in the presence of hydrogen at a temperature of about 50 °C to about 160 °C and a pressure of from about 3 MPa to about 5 MPa to provide a catalyst activity of greater than 30,000 pounds of product per pound of catalyst; and then recovering isotactic polypropylene having a melt flow rate of 20 dg/min or less as measured according to ASTM D-1238 at 230 °C and 2.16 kg. |
申请公布号 |
WO2008027116(A1) |
申请公布日期 |
2008.03.06 |
申请号 |
WO2007US15873 |
申请日期 |
2007.07.12 |
申请人 |
EXXONMOBIL CHEMICAL PATENTS INC.;CASTY, GARRY, LEE;PILAND, EVAN |
发明人 |
CASTY, GARRY, LEE;PILAND, EVAN |
分类号 |
C08F4/02;B01J21/16;B01J31/02;B01J31/12;B01J31/14;B01J31/16;B01J31/18;B01J31/22;C08F4/642;C08F4/6592;C08F10/00;C08F110/06;C08F210/16 |
主分类号 |
C08F4/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|