发明名称 |
SUPPORTED CATALYST FOR ETHYLENE POLYMERIZATION AND THE COPOLYMERIZATION OF ETHYLENE WITH ALPHA-OLEFINS, ITS PREPARATION AND USE |
摘要 |
A supported Ziegler-Natta catalyst active in ethylene polymerization and in the copolymerization of ethylene with alpha- olefins consists of: (A) a cocatalyst in the form of an organometallic compound of aluminium, and (b) a solid catalyst component obtained by: - (i) impregnating a granular solid support with a solution of a titanium alcaholate and magnesium chloride in a liquid aliphatic hydrocarbon, followed by evaporation of the hydrocarbon solvent; - (ii) impregnating the support treated in (i) with a solution of magnesium chloride in a liquid aliphatic ester, followed by evaporation of the ester solvent; and - (iii) activating the support treated in (ii) by contact with an alkyl aluminium halide. In a preferred embodiment, measured quantities of a silicon halide are introduced in stage (i) and/or (ii), this considerably improving catalytic activity. In a particular embodiment, zirconium or hafnium are introduced into the solid catalyst component (B) in addition to titanium, to obtain catalysts able to produce polyethylenes with a widened molecular weight distribution.
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申请公布号 |
CA2038330(A1) |
申请公布日期 |
1991.09.17 |
申请号 |
CA19912038330 |
申请日期 |
1991.03.15 |
申请人 |
MONTEDIPE S.R.L. |
发明人 |
LUCIANI, LUCIANO;INVERNIZZI, RENZO;MASI, FRANCESCO;PONDRELLI, MADDALENA;MARIO, POLESELLO;BORGHI, ITALO |
分类号 |
C08F4/658;C08F4/60;C08F4/646;C08F4/652;C08F4/654;C08F4/655;C08F4/6592;C08F10/00;C08F10/02;(IPC1-7):C08F4/642;C08F10/14 |
主分类号 |
C08F4/658 |
代理机构 |
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主权项 |
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地址 |
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