Preparation of phenol by direct hydroxylation of benzene
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United States of America Patent
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Mar 19, 1991
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N/A
app pub date -
May 2, 1989
filing date -
May 2, 1988
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Expired
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Abstract
Phenol is prepared by directly hydroxylating benzene with nitrous oxide, preferably in vapor phase, on a substrate of acidified zeolite particulates, advantageously ZSM-5 zeolite particulates, and such acidified zeolite particulates having a molar ratio SiO.sub.2 /Al.sub.2 O.sub.3 of greater than about 90, preferably up to 500.
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