发明名称 |
A process for producing a chromium pillared ribbon-like clays catalyst and its use for the polymerisation of alpha-olefins. |
摘要 |
<p>A process for preparing pillared chromium ribbon-like silicate clay alpha -olefin catalysts is disclosed This process utilizes palygorskite and sepiolite clays. The pillaring of said clays comprise the steps of: (a) preparing a hydrolyzed first solution by dissolving a chromium salt and a base in water, heating said first solution to a temperature in the range of about 20 DEG C to about 100 DEG C while stirring continuously until the solution reaches a pH in the range of about 1.5 to about 2.5 and thereby producing a master batch; (b) diluting said master batch with water to produce a diluted second solution and heating said diluted second solution to produce a heated second solution; (c) adding a solid clay selected from the group consisting of sepiolites and palagorskites to said heated second solution, and continuing heating; (d) recovering said pillared chain silicate clay; (e) drying said pillared chain silicate clay to form first product; The activation of said clays comprise the steps of: (a) heating said first product at a temperature in the range of about 150 DEG C to about 500 DEG C and for a time period in the range of about 30 minutes to about 10 hours in an inert atmosphere; (b) thereafter reheating said first product at a temperature in the range of about 500 DEG C to about 900 DEG C and for a time period in the range of about 1 hour to about 50 hours in an oxidizing atmosphere and recovering said catalyst composition. This results in clay catalysts which polymerize alpha -olefins.</p> |
申请公布号 |
EP0546499(A1) |
申请公布日期 |
1993.06.16 |
申请号 |
EP19920120904 |
申请日期 |
1992.12.08 |
申请人 |
PHILLIPS PETROLEUM COMPANY |
发明人 |
SHVEIMA, JOSEPH SAMUEL |
分类号 |
C01B33/20;B01J21/16;B01J23/26;B01J29/04;C01B33/44;C08F4/06;C08F4/24;C08F10/00 |
主分类号 |
C01B33/20 |
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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