Catalysts for production of phenol and its derivatives
Patents
| Language: |
Английский |
| Type: |
Invention |
| Number |
US RE36856 E |
| Request number: |
09/073,730 |
| Request date: |
May 6, 1998 |
| patent.field.start_date: |
|
| Registration date: |
Sep 5, 2000 |
| patent.field.request_publication_date: |
|
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.