Process for preparing 1,1,2 trichloroethylane

Abstract

The invention discloses a method to make 1,1,2 trichloroethane. It includes the following steps: using 1,1,2 trichloroethane as circling medium sending to the first mixing spraying device, the vinyl chloride would be absorbed into the first mixing area of the first mixing spraying device through, and vinyl chloride dissolving in the 1,1,2 trichloroethane would be sent to the second spaying device, and the chlorine would be absorbed at the mixing area of the second mixing spraying device. The vinyl chloride would take reaction with chloride in the mixing area of the second mixing spraying device and coming into the main channel reactor to continue reacting to form 1,1,2 trichloroethane, the result would be separated in the separator and coming into the post section. The invention is simple structure, easy to operate, and the conversion of vinyl chloride could reach to 98%.

Description

technical field [0001] The present invention relates to a method for preparing 1,1,2-trichloroethane. Background technique [0002] 1,1,2-Trichloroethane is an important chemical raw material, which can be used to prepare chemical products such as vinylidene chloride. 1,1,2-Trichloroethane is generally a chlorinated product of vinyl chloride and chlorine gas. The reaction equation is: [0003] CHCl=CH 2 +Cl 2 -→CHCl 2 -CH 2 Cl [0004] Many documents and patents disclose the method for preparing 1,1,2-trichloroethane, such as the patent (publication number: CN1440959) applied by Japan Kureha Chemical Industry Co., Ltd. in China, which discloses a method in the presence of a catalyst The method for preparing 1,1,2-trichloroethane, an obvious defect of the technology disclosed in this patent is that a catalyst is required. Due to the use of the catalyst, not only the cost is increased, but also the production process is relatively complicated and the investm...

AI Technical Summary

Problems solved by technology

[0004] Many documents and patents disclose the method for preparing 1,1,2-trichloroethane, such as the patent (publication number: CN1440959) applied by Japan Kureha Chemical Industry Co., Ltd. in China, which discloses a method in the presence of a catalyst The method for preparing 1,1,2-trichloroethane, an obvious defect of the technology disclosed in this patent is that a catalyst is required. Due to the use of the catalyst, not only the cost is increased, but also the production process is relatively complicated and the investment in equipment is large.

At present, many methods of producing 1,1,2-trichloroethane in China use tower-type bubbling reactors, which have poor gas-liquid mass transfer effects, which may easily cause excessive chlorine and vinyl chloride ratios in the reaction area, uneven temperature distribution, and many The amount of chloride formation increases and the selectivity of the reaction decreases

Images