Benzylic oxidation and catalyst therefor
AssigneePhillips Petroleum Company
InventorsChung C. Tso, Robert L. Wynn
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Abstract
Oxidation of alkylaromatics having a benzylic hydrogen atom is catalyzed by a catalyst comprising a palladium salt, a metal persulfate, a third metal salt, and a tin salt in a carboxylic acid for a period of time sufficient to convert the alkylaromatics to their corresponding oxidized derivatives. The catalyst is prepared by preheating the palladium salt and the metal persulfate at a temperature sufficient to provide the desired catalytic activity followed by additon of the third metal salt and the tin salt.
Claims14
A process for oxidizing an alkylaromatic having a benzylic hydrogen to its corresponding oxidized product selected from the group consisting of carboxylic acids, aldehydes, alcohols and esters comprising contacting said alkylaromatic in the presence of an oxygen-containing fluid in a reaction medium with a catalyst comprising a palladium salt, a metal persulfate, a third metal salt having a general formula of MX wherein M is an alkali or alkaline earth metal and X is selected from the group consisting of carboxylate, acrylate, sulfate, nitrate, phosphate, and halide and a tin salt, in a carboxylic acid under conditions sufficient to oxidize said benzylic hydrogen of said alkylaromatic.
Dependencies are inferred from the claim text.