Steam sorbent for heat engines and heat pumps and method for its preparation
Патенты
| Язык: |
Немецкий |
| Тип: |
Патент на изобретение |
| Номер (11) |
DE 19855475 A1 |
| Номер заявки (21): |
19855475.3 |
| Дата подачи заявки (22): |
1 дек. 1998 г. |
| Дата начала отсчета срока действия патента (24): |
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| Дата публикации патента (44,45,46): |
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| Дата публикации заявки (43): |
17 июн. 1999 г. |
The steam sorbent consists of a mixt. of silica gel and 15-55 wt.% hygroscopic material (e.g., CaCl2, MgCl2, LiBr) dispersed in the silica gel. An alc. soln. of a silica precursor (e.g., 10-60 vol.% tetramethoxysilane or tetraethoxysilane) is hydrolyzed and condensed using a 30-40 wt.% aq. soln. of the hygroscopic materials at 293-323 K in the presence of a catalyst, e.g., NaF, KF, NH4F, NH4OH, HNO3, HCl, H2SO4 or HF. The resulting gel is dried to <5 wt.% water.