| 发明名称 |
Process for preparing crystalline silicas |
| 摘要 |
Disclosed is a process for preparing crystalline silicas having the monoclinic symmetry which comprises the step of calcining in air for at least 3 hours at a temperature of at least 500 DEG C. a crystalline silica of the silicalite type having a silica to alumina atomic ratio of at least 80.
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| 申请公布号 |
US4772456(A) |
申请公布日期 |
1988.09.20 |
| 申请号 |
US19830562652 |
申请日期 |
1983.12.19 |
| 申请人 |
COSDEN TECHNOLOGY INC |
发明人 |
DECLIPPELEIR, GEORGES E. M. J.;CAHEN, RAYMOND M.;VAN THILLO, HUGO;DEBRAS, GUY L. G. |
| 分类号 |
B01J29/035;B01J29/04;B01J29/40;B01J29/70;C01B33/12;C01B37/02;C07C1/00;C07C2/66;C07C5/27;C07C15/02;C07C67/00;(IPC1-7):C01B33/20 |
主分类号 |
B01J29/035 |
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