Catalysts for production of phenol and its derivatives
||US 5672777 A
||Feb 28, 1996
||Sep 30, 1997
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.