发明名称 |
Silica supported transition metal catalysts |
摘要 |
A transition metal containing catalyst useful for the polymerization of alpha -olefins is prepared by (A) forming in an inert atmosphere which excludes oxygen and moisture a slurry of (1) a porous inorganic oxide support material selected from the group consisting of silica, alumina, or a combination of silica and alumina, said support material containing not greater than about 5 millimoles of hydroxyl groups per gram of support material and a particle size not greater than about 10 microns and a surface area of from about 50 to about 800 m2/g in an inert organic liquid medium; (B) mixing said slurry with (2) an alkoxide and stirring the resultant mixture at a temperature of from about -20 DEG C. to about 120 DEG C. for a time sufficient to saturate the surface of the support material: (C) mixing the product form (B) with (3) a titanium compound or a combination of a titanium compound and (4) a vanadium compound and stirring the resultant mixture at a temperature of from about -20 DEG C. to about 120 DEG C. for a time sufficient to allow complete reaction of the titanium compound and the vanadium compound with the organomagnesium moieties remaining on the solid support; (D) mixing the product from (C) with an inert organic solution of (5) a Group IIIA metal alkyl halide at a temperature of from about -20 DEG C. to about 120 DEG C. for a time sufficient to complete the reduction of the titanium and vanadium, if present, compounds to their final oxidation state.
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申请公布号 |
US5420090(A) |
申请公布日期 |
1995.05.30 |
申请号 |
US19930021705 |
申请日期 |
1993.02.24 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
SPENCER, LEE;KOLTHAMMER, BRIAN W. S. |
分类号 |
C08J5/18;B29C55/02;B29K23/00;B29L7/00;C08F4/646;C08F4/658;C08F4/685;C08F10/00;C08F210/00;C08F210/02;C08F210/16;(IPC1-7):B01J31/00 |
主分类号 |
C08J5/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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