发明名称 |
PARTIALLY HYDROPHOBIC PRECIPITATED SILICAS |
摘要 |
Partially hydrophobic precipitated silica with a methanol crosslinking potential of 10-49% is new. When anhydrous, the silica has a DBP absorption > 250 g/100 g. The average particle size is 1-12 .mu.m and the silica has a carbon content of 0.3-1.85 %, and when dried, it loses 2.6-10 % of its weight. It has a pH of 5.5-10. The silica is prepared by mixing a silica suspension (which has been prepared using known methods) with a material that gives the silica hydrophobic properties. The mixing takes place for a very short time at conditions of low pH and high shear. The resulting suspension is filtered and washed in salt-free conditions, and the filter cake is dried, thermally treated and powdered.
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申请公布号 |
CA2201186(C) |
申请公布日期 |
2000.10.10 |
申请号 |
CA19972201186 |
申请日期 |
1997.03.27 |
申请人 |
DEGUSSA AKTIENGESELLSCHAFT |
发明人 |
RAMB, ANJA;MUELLER, ASTRID;MEIER, KARL;LUX, HEINZ-GUENTER;OELMUELLER, ROLF |
分类号 |
C01B33/18;A01N25/08;A01N25/22;A01N57/12;B01D19/04;C09C1/30;C11D3/12;(IPC1-7):B01J20/10 |
主分类号 |
C01B33/18 |
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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