A method for producing high-purity m-cresol

A technology for the production of m-cresol and m-cresol, applied in chemical instruments and methods, ion exchange regeneration, preparation of organic compounds, etc., can solve the problems of complex process flow and low quality of m-cresol products, and achieve simple and good production process Economic benefits, the effect of improving the adsorption separation coefficient
CN108147945BActive Publication Date: 2021-01-26DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2021-01-26

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Abstract

The application provides a method for producing m-cresol, at least including the following steps: (1) passing material I containing m-cresol and p-cresol into an adsorption unit for adsorption separation to obtain m-cresol product; The adsorption unit contains one or more adsorbent beds, and at least one adsorbent bed includes a molecular sieve adsorbent; (2) the material II containing the desorbent is passed into the adsorption unit, and the adsorbent bed in the adsorption unit is Desorb to obtain the desorption material III; pass the desorption material III into the separation unit to separate and obtain the desorbent material IV and the mixed cresol material V; (3) return the desorbent stream IV obtained by separation in the step (2) to the adsorption unit for recycling (4) Pass the mixed cresol material V obtained in step (2) into the isomerization reaction unit for reaction to obtain the isomerization product material VI; the isomerization product material VI is returned to the adsorption unit.
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Description

technical field

[0001] The application relates to a method for producing high-purity m-cresol, which belongs to the field of chemistry and chemical engineering. Background technique

[0002] m-cresol is mainly used as a pesticide intermediate to produce insecticides fenitrothion, fenthion, medicarb, permethrin, and also an intermediate of color film, resin, plasticizer and spice.

[0003] At present, the main process route for synthesizing m-cresol at home and abroad is to use cumene to be converted into methyl cumene hydroperoxide under the initiation of hydrogen peroxide free radicals, and then oxidize with oxygen in the air to produce It is rich in m- and p-cresol, and acetone is produced by-product, but the complexity of the reaction is much higher than that of phenol. The product obtained by this method has almost no ortho-position products, and the ratio of inter-position and para-position is about 7:3. And this method distillation purification cost is high. [0004...

Claims

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