Patent ID: 6476277
Filing Date: 2002-11-05
Classification: C07C,Y10S

Abstract:
A process for preparing hydroxyaromatics comprising reacting aromatics of the formula (I)Arâ€”Rnâ€ƒâ€ƒ(I) whereinAr represents benzene or naphthalene, R represents Br, Cl, F, NO2, CN, NH2, OH, C1-C6-alkyl, or phenyl, and n denotes zero, 1, or 2, with dinitrogen monoxide in the gas phase in the presence of zeolites selected from the group consisting of pentasils, ferrierite and zeolite-&bgr; wherein the zeolites have a crystallite size <100 nm and are calcined at temperatures of 500 to 1350Â° C. before use.