发明名称 |
CATALYST COMPONENT AND CATALYST FOR THE PRODUCTION OF VERY HIGH MOLECULAR WEIGHT POLYOLEFINS |
摘要 |
A solid catalyst component for the low-pressure polymerization of ethylene and C3-C10 alpha-olefins into very high molecular weight polyolefins is in the form of a spherical granular solid having a surface area of between 20 and 40 m2/g, a mean pore radius of between 5,000 and 40,000 A and a porosity of between 40 and 90 vol %, and is definable by the following formula (in atomic proportions): X (1), Mg (1-8), Al (0.2-0.8), Cl (5-20), (Et+OEt+OR) (1-3); where: X = Hf or Zr; Et = ethyl group; OEt = ethoxy group; and OR = alkoxy group containing from 2 to 8 carbon atoms in the linear or branched alkyl portion. Such a catalyst component is obtained by preparing a solid spherical granular support by spray-drying an ethanolic solution of magnesium chloride, reacting said support with a hafnium or zirconium alkoxide or halogenalkoxide, and finally reacting the thus treated support with an alkyl aluminium chloride.
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申请公布号 |
CA1334405(C) |
申请公布日期 |
1995.02.14 |
申请号 |
CA19890610417 |
申请日期 |
1989.09.06 |
申请人 |
ENICHEM ANIC S.P.A. |
发明人 |
MASI, FRANCESCO;MOALLI, ANGELO;INVERNIZZI, RENZO;MENCONI, FRANCESCO;FERRERO, CESARE;MALQUORI, STEFANO;BARAZZONI, LIA;POLESELLO, MARIO |
分类号 |
C08F4/658;C08F4/60;C08F4/654;C08F4/655;C08F4/6592;C08F10/00;C08F10/02;(IPC1-7):C08F10/02;C08F4/645 |
主分类号 |
C08F4/658 |
代理机构 |
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代理人 |
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地址 |
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