Uop Lcc

Eric M Hyatt

Thomas P Malloy

Laszlo T Nemeth

Certain crystalline titanoaluminosilicate molecular sieve compositions having titanium, aluminum, and silicon present as framework tetrahedral oxide units are particularly effective in hydroxylating the aromatic nucleus of aromatic compounds using hydrogen peroxide, even where the hydrogen peroxide is used at concentrations of 10 weight percent or less. The variant where the exchangeable hydrogens of the titanoaluminosilicate are replaced by an alkali or alkaline earth metal cation is particularly favored because of the concomitant increase in selectivity. Excellent utilization of hydrogen peroxide often is observed, even when the hydroxylation is effected at temperatures under about 60.degree. C.

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Naperville, IL, United States of America

Eric M Hyatt