Technology for producing trans-1,2-dichloroethylene

Abstract

The invention discloses production technology for producing trans-1,2-dichloroethylene by reaction of acetylene and an oxidant in solution, which is characterized in that: the acetylene and the chlorine-containing metal salt solution react at a certain temperature in solution to form the trans-1,2-dichloroethylene, and the oxidant per se is reduced. The chlorine-containing oxidant comprises FeCl3, TiCl4, CrCl6, CuCl2, SnCl4, HgCl2, and the like. The chlorine-containing oxidant can be one of the FeCl3, TiCl4, CrCl6, CuCl2, SnCl4, HgCl2, and the like, or a composition of several in the FeCl3, TiCl4, CrCl6, CuCl2, SnCl4, HgCl2, and the like. Through the production technology, high-selectivity and high-yield trans-1,2-dichloroethylene product can be obtained; and the technology has the advantages of wide source of raw materials, safe operation and low production cost, and is clean production technology which is convenient to popularize and apply.

Description

technical field [0001] The invention relates to the technical field of production of chlorinated hydrocarbons, in particular to a method for producing trans-1,2-dichloroethylene by reacting acetylene with an oxidant in a solution. Background technique [0002] Trichlorethylene and tetrachlorethylene have been widely used as organic solvents and low-temperature extractants at home and abroad for a long time because of their low toxicity, easy volatility and stable performance. However, domestic and foreign studies in recent years have shown that the large-scale use of trichlorethylene and tetrachlorethylene will increase the global warming effect, so it is of great practical significance to seek environmentally friendly substitutes for trichlorethylene and tetrachlorethylene. [0003] Trans-1,2-dichloroethylene can be used as a solvent for paints, resins, waxes, rubber, and cellulose acetate, as well as dry cleaning agents, insecticides, fungicides, anesthetics, low-temperatu...

AI Technical Summary

Problems solved by technology

This method deacidifies and dehydrates the low boiling matter, and then distills the product. Although this method can realize waste utilization and reduce environmental pollution, it is greatly affected by the production of trichlorethylene

[0006] Nieuwland and Foohey's research (J.A.Nieuwland and W.L.Foohey, Proc.Indiana Acad.Sci., 1929, 38, 196) found that Cu 2 Cl 2 , HCl and NH 4 In a mixture of Cl, a mixed product containing 30% vinyl chloride can be obtained; passing acetylene into a mixture containing CuCl 2 、Cu 2 Cl 2 and NH 4 In the hydrochloric acid solution of Cl, a mixture of vinylidene chloride, trans-dichloride and cis-dichloride can be generated, and the yield and selectivity of various products are not specifically reported