Method for producing epichlorohydrin

Abstract

The invention relates to a method for producing epichlorohydrin. The method comprises the steps of firstly removing hydrogen chloride from dichloropropanol, and then, producing the epichlorohydrin. Apreparation method of the dichloropropanol comprises the following steps: firstly, enabling glycerine and an aqueous solution of the hydrogen chloride to react in the presence of a catalyst, so as toproduce a first reaction product, then, enabling first feed derived from the first reaction product to enter a first distillation tower containing a first phase splitter, so as to produce a first tower top product and a first tower bottom product, finally, condensing the first tower top product, then, enabling the condensed first tower top product to enter the first phase splitter, directly connecting a first water supply device to the first phase splitter, forming a first aqueous product and a first organic phase product in the first phase splitter, wherein the first organic phase product contains the dichloropropanol; taking out the first organic phase product. According to the method, the problems of severe environmental pollution and relatively high resource waste of methods for producing the epichlorohydrin in the prior art are solved.

Description

technical field [0001] The invention belongs to the technical field of producing organic compounds, in particular to a method for producing epichlorohydrin. Background technique [0002] The resources of natural petroleum products such as oil or natural gas obtained from the earth are known to be limited, and these resources are currently used to produce fuels, as starting materials for the production of various organic compounds, and then the purification process requires a relatively high cost At present, the main preparation method of dichloropropanol is propylene (propene) high-temperature chlorination method, which includes two steps: chlorinating propylene at high temperature to generate allyl chloride (allyl chloride), and using excess industrial With water, allyl chloride is reacted with a chlorinating agent to form dichloropropanol. However, the use of high-temperature chlorination of propylene generates a large amount of wastewater and other wastes, thus posing te...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for producing epichlorohydrin, which solves the problems of serious environmental pollution and large waste of resources in the method for producing epichlorohydrin existing in the prior art