Catalysts for production of phenol and its derivatives
||WO 9527560 A1
||Apr 12, 1995
||Oct 19, 1995
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 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 to 1000 DEG C. Two hours of hydrothermal treatment has been shown to be effective.