Catalysts for production of phenol and its derivatives
Патенты
Язык: |
Английский |
Тип: |
Заявка на патент |
Номер (11) |
WO 9527560 A1 |
Номер заявки (21): |
PCT/RU95/00065 |
Дата подачи заявки (22): |
12 апр. 1995 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): |
19 окт. 1995 г. |
Zeolite catalysts useful for the production of phenol and its derivatives by oxidative hydroxylation of benzene and its derivatives by nitrous oxide, e.g. at temperatures of 225-450 DEG C, having substantially enhanced process characteristics resulting from hydrothermal treatment using a gas containing from about 3 to 100 mole percent water vapor, e.g. in nitrogen, at a temperature ranging from about 500 to 1000 DEG C. Two hours of hydrothermal treatment has been shown to be effective.