Catalysts for production of phenol and its derivatives
Patents
| Language: |
Английский |
| Type: |
Invention |
| Number |
US 5672777 A |
| Request number: |
608,541 |
| Request date: |
Feb 28, 1996 |
| patent.field.start_date: |
|
| Registration date: |
Sep 30, 1997 |
| patent.field.request_publication_date: |
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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.