Process for producing chlorohydrin

Abstract

A process for producing chlorohydrins through reaction of a polyhydroxylated aliphatic hydrocarbon, such as glycerol, and / or an ester of polyhydroxylated aliphatic hydrocarbon with a chlorinating agent, which process realizes high reaction efficiency and economic advantage. The process for producing chlorohydrins comprises the steps of (A) reacting a polyhydroxylated aliphatic hydrocarbon and / or an ester of polyhydroxylated aliphatic hydrocarbon with a chlorinating agent and (B) bringing the thus obtained reaction mixture into countercurrent contact with a diffuser gas so as to cause at leasta potion of reaction product to be entrained by the diffuser gas and drawn out from the reaction mixture. Preferably, the process further comprises the step of (C) condensing at least a portion of the reaction product entrained by the diffuser gas.

Description

technical field The present invention relates to a method for producing chlorohydrins used for producing organic compounds such as chlorohydrins and glycidol. Background technique Dichlorohydrin used in the production of epichlorohydrin is usually produced by chlorohydrinizing allyl chloride. However, in this general production method, there have been problems such as generation of chlorides such as trichloropropane as by-products and a large amount of water discharge, and a new production method has been desired. As another method for producing dichloropropanol, a method of producing dichloropropanol by reacting glycerin and hydrogen chloride gas in the presence of a catalyst such as formic acid or acetic acid is known (for example, refer to Patent Documents 1 to 3). This method is preferable in that dichloropropanol can be produced without by-producing chlorides such as trichloropropane. Furthermore, the raw material glycerin used in this production method is a low-cos...

AI Technical Summary

Problems solved by technology

The removal of water generated by the reaction is usually carried out by heating the reaction mixture and carrying out distillation. However, since water has the property of azeotroping with hydrogen chloride, a large amount of hydrogen chloride is accompanied in the water. Therefore, the loss of hydrogen chloride is large in industry, and it is economical. not preferred

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