Title:
砕けやすい噴霧乾燥した凝集担体およびその上に担持されたオレフィン重合触媒の製造方法
Document Type and Number:
Japanese Patent JP4767416
Kind Code:
B2
Abstract:
A method of making frangible, spray dried agglomerate catalyst supports is provided, e.g. of silica gel, which possess a controlled morphology of microspheroidal shape, preferably a rough, scabrous appearance, and interstitial void spaces which penetrate the agglomerate. The agglomerates also possess a 4-250 micron particle size, 1-1000 m2/gm. surface area, and an Attrition Quality Index (AQI) of at least 10. The method comprises dry milling inorganic oxide particles, e.g. silica gel, wet milling the dry milled inorganic oxide particles (to preferably impart a colloidal segment of <1 micron particles), and spray drying the particles. The high AQI assures that the agglomerates are frangible and that polymerization performance is improved. The controlled morphology is believed to permit the constituent particles of the agglomerates to be more uniformly impregnated or coated with conventional olefin polymerization catalysts.
Inventors:
Denton, Dane A
Carney, Michael Jay
Carney, Michael Jay
Application Number:
JP2000589280A
Publication Date:
September 07, 2011
Filing Date:
December 20, 1999
Export Citation:
Assignee:
W. R. Grace and Company-Connecticut
International Classes:
B01J21/08; B01J32/00; B01J35/02; B01J37/00; C08F4/02; C08F4/648; C08F4/6592; C08F10/00; C08F10/02; C08F110/02
Domestic Patent References:
| JPH02221112A | 1990-09-04 | |||
| JPH05245382A | 1993-09-24 | |||
| JPS6344943A | 1988-02-25 | |||
| JPS60190232A | 1985-09-27 | |||
| JPS57132550A | 1982-08-16 |
Attorney, Agent or Firm:
Patent business corporation Odashima patent office