Катализатор для очистки нитрозных газов от кислорода и двуокиси азота и способ его приготовления (варианты)
Патенты
| Язык: |
Русский |
| Тип: |
Патент на изобретение |
| Номер (11) |
SU 892763 A3 |
| Номер заявки (21): |
802975954 |
| Дата подачи заявки (22): |
19 июн. 1980 г. |
| Дата начала отсчета срока действия патента (24): |
|
| Дата публикации патента (44,45,46): |
10 авг. 1998 г. |
| Дата публикации заявки (43): |
|
FIELD: gas treatment catalysts.
SUBSTANCE: nitrose gas-cleaning catalyst containing silver oxide and manganese dioxide on alumina carrier is distinguished by additionally containing ferric oxide and cobaltous oxide, final catalyst composition being as follows, wt %: ferric oxide, 10-30; manganese oxide, 4-7; silver oxide, 3.5-10; alumina, the balance. Method of preparing catalyst including impregnation of carrier with silver nitrate aqueous solution and calcination at 500-550 C is distinguished by using, as carrier, reprecipitated aluminum hydroxide or its mixture with commercial-grade aluminum hydroxide at weight ratio from 1:4 to 4:1, which is preliminarily treated by acetic acid and, prior to be impregnated, mixed with ferric oxide, manganese dioxide and cobaltic-cobaltous oxide, molded, dried, and calcined at 500-550 C.
EFFECT: increased catalyst activity.