Method for producing dichloropropanol

Abstract

The invention provides a method for producing dichloropropanol, a chlorination agent and glycerol are adopted for reaction, and water generated by the reaction is continuously removed under the condition of taking a phosphorous acid derivative or a phosphoric acid derivative or a phosphorus chloride derivative as a catalyst, thereby obtaining the dichloropropanol. The method overcomes the shortcomings of product pollution, great separation difficulty and impact on yield which are caused by volatilization of carboxylic acid catalysts and the shortcomings of high price and lower catalytic efficiency of non-volatile organic acid catalysts in the prior art, reduces the using amount of the catalyst and simultaneously improves the product yield.

Description

technical field

[0001] The invention belongs to the field of chemical industry, and relates to a preparation method of an epichlorohydrin intermediate, more specifically a method for preparing dichloropropanol from glycerin. Background technique

[0002] Dichloropropanol is an important intermediate in the production of epichlorohydrin, which is an important organic chemical raw material and fine chemical product with a wide range of uses. The epoxy resin prepared from it has the characteristics of strong adhesion, resistance to chemical medium corrosion, low shrinkage, good chemical stability, high impact strength and excellent dielectric properties. It is used in coatings, adhesives, reinforcing materials, Industries such as casting materials and electronic laminates have a wide range of applications. Epichlorohydrin can also be used to synthesize nitroglycerin explosives, glass fiber reinforced plastics, electrical insulation products, surfactants, medicines, pesticides,...