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专利名称：Frangible, spray dried agglomerated
supports, method of making such supports,and olefin polymerization catalystssupported thereon
发明人：Dean Alexander Denton,Michael J. Carney申请号：US08878476申请日：19970619公开号：US06329315B1公开日：20011211
专利附图：
摘要：Frangible, spray dried agglomerate catalyst supports are provided, e.g. of silica
gel, which possess a controlled morphology of microspheroidal shape, rough, scabrousappearance, and interstitial void spaces which penetrate the agglomerate surface and areof substantially uniform size and distribution. The agglomerates also possess a 1-250micron particle size, 1-1000 m/gm. surface area, and an Attrition Quality Index (AQI) of atleast 10. The agglomerates are derived from a mixture of dry milled inorganic oxideparticles, e.g. silica gel, and optionally but preferably wet milled inorganic oxide particles,e.g. silica gel particles, (which preferably contain a colloidal segment of <1 micronparticles) slurried in water for spray drying. The high AQI assures that the agglomeratesare frangible and that polymerization performance is improved. The controlledmorphology is believed to permit the constituent particles of the agglomerates to bemore uniformly impregnated or coated with conventional olefin polymerization catalysts.
申请人：W. R. GRACE & CO.-CONN.
代理人：Robert A. Maggio
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