Oxidation of phenol was effected by O//2 at 35 kg/cm**2 in dimethylformamide (DMF), dimethyl sulfoxide (Me//2SO), and other solvents, containing variable amounts of CuCl//2 (0. 20-0. 50 mol/L), at temperatures in the range from 50 to 1110 degree C. Besides p-benzoquinone, considerable amounts of o- and p-chlorophenol were identified in the products, their yield strongly depending on the solvent. On the basis of overall conversion of phenol and of selectivity for p-benzoquinone, solvents of dipolar aprotic character, particularly DMF, were found convenient; ethylene glycol gave the poorest results. Kinetic coefficients were evaluated, within the pseudo-first-order approximation, for reactions in DMF and in Me//2SO. The steel surface of the autoclave was found to interfere with the reaction. After PTFE-lining, both rate and selectivity changes are observed.

Kinetics and Byproducts of the Liquid-Phase Oxidation of Phenol to p-Benzoquinone Catalyzed by CuCl2 / P. Beltrame, P.L. Beltrame, P. Carniti. - In: INDUSTRIAL & ENGINEERING CHEMISTRY PRODUCT RESEARCH AND DEVELOPMENT. - ISSN 0196-4321. - 18:3(1979), pp. 208-211.

Kinetics and Byproducts of the Liquid-Phase Oxidation of Phenol to p-Benzoquinone Catalyzed by CuCl2

P. Beltrame;P. Carniti
1979

Abstract

Oxidation of phenol was effected by O//2 at 35 kg/cm**2 in dimethylformamide (DMF), dimethyl sulfoxide (Me//2SO), and other solvents, containing variable amounts of CuCl//2 (0. 20-0. 50 mol/L), at temperatures in the range from 50 to 1110 degree C. Besides p-benzoquinone, considerable amounts of o- and p-chlorophenol were identified in the products, their yield strongly depending on the solvent. On the basis of overall conversion of phenol and of selectivity for p-benzoquinone, solvents of dipolar aprotic character, particularly DMF, were found convenient; ethylene glycol gave the poorest results. Kinetic coefficients were evaluated, within the pseudo-first-order approximation, for reactions in DMF and in Me//2SO. The steel surface of the autoclave was found to interfere with the reaction. After PTFE-lining, both rate and selectivity changes are observed.
Settore CHIM/02 - Chimica Fisica
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/197148
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