Method for catalyzing oxidation of phenol and hydrogen peroxide with selenium-containing catalyst for synthesis of p-benzoquinone

Abstract

The invention relates to a method for catalyzing oxidation of phenol and hydrogen peroxide with a selenium-containing catalyst for synthesis of p-benzoquinone. The method is mild in reaction conditions and can be implemented at normal pressure. According to a technical scheme in the invention, the method comprises the following steps: adding phenol, a solvent, the selenium-containing catalyst and hydrogen peroxide into a glass reaction bottle and carrying out a reaction at a certain temperature, wherein analysis results of oxidized liquid show that the conversion rate of phenol is about 30 to 50%, the selectivity of p-benzoquinone is 80 to 90% and resorcinol and ortho-isomers are not produced. High-selectivity preparation of hydroquinone can be realized through hydrogenation reduction of p-benzoquinone.

Description

technical field

[0001] The invention relates to a method for synthesizing p-benzoquinone by catalyzing the oxidation of phenol hydrogen peroxide by a selenium-containing catalyst. Background technique

[0002] p-Benzoquinone, yellow crystal. Flammable, melting point 116°C, relative density 1.318g / ml, soluble in ethanol, ether and alkali, slightly soluble in water. Can sublime, its vapor is volatile and partially decomposed. Has a pungent chlorine-like odor. It is an important dye and pharmaceutical intermediate, used as a raw material for the manufacture of hydroquinone and rubber anti-aging agents, as acrylonitrile and vinyl acetate polymerization initiators and oxidants.

[0003] The production process of p-benzoquinone is mainly the aniline oxidation method. Aniline in H 2 SO 4 MnO 2 or Na 2 Cr 2 o 7 Oxidation to p-benzoquinone, the advantage of this method is that the process is mature. However, the problem of this method is that the consumption of pyrolusite ...

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