Zeolite catalyst for production of phenol and derivatives
Patents
Language: |
Английский |
Type: |
Invention |
Number |
CA 2187649 C |
Request number: |
2187649 |
Request date: |
Apr 12, 1995 |
patent.field.start_date: |
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Registration date: |
Jun 19, 2001 |
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 DEG -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 DEG to 1000 DEG C. Two hours of hydrothermal treatment has been shown to be effective.