Catalysts for production of phenol and its derivatives
Патенты
| Язык: |
Английский |
| Тип: |
Патент на изобретение |
| Номер (11) |
US 5672777 A |
| Номер заявки (21): |
608,541 |
| Дата подачи заявки (22): |
28 февр. 1996 г. |
| Дата начала отсчета срока действия патента (24): |
|
| Дата публикации патента (44,45,46): |
30 сент. 1997 г. |
| Дата публикации заявки (43): |
|
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° 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° C. Two hours of hydrothermal treatment has been shown to be effective.