Method for synthesizing chlorohydrin by using hydrochloric acid and ethylene oxide

Abstract

The invention discloses a method for synthesizing chlorohydrin by the reaction of 30 to 36 wt% industrial hydrochloric acid and ethylene oxide. The molecular ratio of the ethylene oxide to the chlorine hydride is kept between 1.01 and 1.05; in the method, a self-prepared supported catalyst is used, so that the side reactions are effectively inhibited and the conversion rate is improved; and a fixed bed reactor is used, the reaction temperature is controlled to between 30 and 60 DEG C, and the 47 to 53 wt% aqueous solution of chlorohydrin can be finally obtained. The method has the advantages of simplifying the production process and lowering production cost.

Description

technical field The invention belongs to the technical field of organic chemical production, and in particular relates to a synthesis method of chloroethanol. Background technique Chlorohydrin is a colorless liquid, an important organic solvent, an important raw material for polysulfide rubber, and is widely used as an intermediate raw material for medicine, pesticides, and dyes. The industry has gradually shifted to developing countries, and my country's pharmaceutical, pesticide, and dye intermediate industries have developed rapidly, which has also driven the demand for chlorohydrin. Chloroethanol was obtained from the reaction of ethylene glycol and hydrogen chloride by Woots as early as 1859. The current industrial production method of chloroethanol is basically the ethylene hypochlorination method proposed by Gomberg in 1919. This process has many side reactions and many impurities in the product. , the application is limited; the initial concentration is low, the rec...

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Problems solved by technology

The catalyst remains in the product of this method, which affects the purity and appearance of the product, and further refining is required

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