Method for the manufacture of phenols
OwnerAndrei Nikolaevich Bashkirov, Mark Markovich Grozhan +3inventors
InventorsAndrei Nikolaevich Bashkirov, Mark Markovich Grozhan, Vladimir Vasilievich Kamzolkin, Jury Anatolievich Lapitsky, Irina Vladimirovna Vygodskaya
Life of this patent
Estimating the term…
Abstract
A method for the production of phenols which comprises subjecting alkylaromatic hydrocarbons to liquid-phase oxidation with oxygen at a temperature of 100.degree.-300.degree. C and under a pressure of 1-100 atm in the presence of an acidic catalyst taken in an amount of 0.0006-10 mole % and also in the presence of carboxylic acid anhydrides or chlorides, followed by saponifying the resulting phenolic esters.
Claims14
A method for the production of a monohydric phenol comprising subjecting an alkyl benzene wherein the alkyl moiety consists of at least one alkyl group selected from the group consisting of methyl and ethyl groups to liquid-phase oxidation with oxygen at a temperature of 180.degree.-250.degree. and under a pressure of 15-30 atm in the presence of
- a. 0.0006 to 10 mole percent of a strongly acidic catalyst and
- b. an esterifying agent selected from the group consisting of lower alkanoic carboxylic acid anhydrides and acid chlorides, followed by saponification or hydrolysis of the resulting monohydric phenolic ester to form the monhydric phenol.
A method for the production of a polyhydric phenol comprising subjecting a phenolic alkyl ester containing an alkyl group selected from the group consisting of methyl and ethyl groups in the aromatic ring to liquid-phase oxidation with oxygen at a temperature of 180.degree.-250.degree. C. and under a pressure of 15-30 atm in the presence of
- a. 0.0006 to 10 mole percent of a strongly acid catalyst and
- b. an esterifying agent selected from the group consisting of lower alkanoic carboxylic acid anhydrides and acid chlorides, followed by saponification or hydrolysis of the resulting polyhydric phenolic ester to from the polyhydric phenol.
A method of oxidizing an organic compound selected from the group consisting of toluene, xylene, ethyl benzene and trimethylbenzene to form a phenolic alkyl ester comprising subjecting said compound to liquid-phase oxidation with oxygen at a temperature of 180.degree.-250.degree. C. and under a pressure of 15-30 atm. in the presence of
- a. 0.0006 to 10 mole percent of a strongly acidic catalyst and
- b. an esterifying agent selected from the group consisting of lower alkanoic carboxylic acid anhydrides and acid chlorides.
Dependencies are inferred from the claim text.