Method for producing epoxy chloropropane

Abstract

The invention relates to a method for producing epoxy chloropropane by a phase transfer method, which comprises the following steps of: adding 3-chloropropene serving as a raw material and a catalyst into a reactor, stirring, heating to the bubble point temperature of between 44 and 46 DEG C, adding hydrogen peroxide serving as an oxidant, and reacting at the bubble point temperature, wherein reaction heat in the reaction process is taken away through organic steam condensation and reflow; the catalyst is quaternary ammonium phosphotungstate; the reaction time is 1 hour; and the mass ratio of the 3-chloropropene to 50 percent hydrogen peroxide to the catalyst is 1:0.3:0.11. Other solvents are not added in the reaction; the hydrogen peroxide is added at the temperature of between 44 and 46 DEG C, so that the epoxidation reaction is further promoted, and the conversion rate of the epoxidation reaction is improved; meanwhile, the increase of organic steam partial pressure is facilitated, gaseous oxygen is diluted, and the blasting danger of a gaseous phase of the reactor is effectively reduced.

Description

technical field [0001] The invention relates to a production method of epichlorohydrin, in particular to a method for producing epichlorohydrin by a phase transfer method. Background technique [0002] Epichlorohydrin is an important organic chemical raw material and fine chemical product with a wide range of uses. The traditional epichlorohydrin production process is mainly propylene high-temperature chlorination method and propylene acetate method, and there is a large amount of "three wastes" pollution control problems in the process of saponification sewage discharge. With the advancement of the sustainable development strategy, the green synthesis route of epichlorohydrin with industrial value has become the focus of research in the industry. The current research mainly focuses on the exploration of the direct epoxidation process route of allyl chloride, using titanium silicon molecular sieve or phosphorus Tungstate is used as a catalyst, and hydrogen peroxide is used ...

AI Technical Summary

Problems solved by technology

However, under the action of the catalyst, a part of hydrogen peroxide decomposes ineffectively during the reaction, which not only reduces the conversion rate of the reaction, but also easily causes the gas phase of the reactor to form a mixed gas with explosion hazard.