Acetylene purification interlocking control type trans-1,2-dichloroethylene preparation system

Abstract

A provided acetylene purification interlocking control type trans-1,2-dichloroethylene preparation system comprises a synthesis tower, a regeneration tower, a mother liquor storage tank, a regeneration storage tank and a neutralization device, a tower bottom gas phase inlet of the synthesis tower is used for introducing acetylene gas, a tower bottom liquid phase inlet is connected with an outlet of the mother liquor storage tank, a tower top gas phase outlet of the synthesis tower is connected with a condenser for synthesis, a tower bottom gas phase inlet of the regeneration tower is used for introducing chlorine gas, and a tower top liquid phase inelt of the regeneration tower is connected with the regeneration storage tank. The neutralization device comprises a mixer, an oil-water separator, a neutralization liquid storage tank and an alkali liquor tank, the oil-water separator is connected with an outlet of a crude product tank, an oil phase outlet of the oil-water separator is connected with an inlet of the mixer, an outlet of the mixer is connected with the neutralization liquid storage tank, and a gas treatment device is further arranged at the front end of an acetylene gas feeding pipeline. According to the scheme, the cleanliness degree of gas entering the synthesis tower meets the process requirement, and meanwhile new chemical substances cannot be introduced.

Description

technical field [0001] The invention relates to the technical field of trans-1,2-dichloroethylene preparation, in particular to an acetylene purification chain control type trans-1,2-dichloroethylene preparation system. Background technique [0002] Trans-1,2-dichloroethylene (hereinafter referred to as dichloroethylene) is a good solvent and chemical raw material, a colorless, volatile liquid with a slightly pungent smell. Its main uses are: used as a solvent for paints, resins, waxes, rubber, and cellulose acetate, used in dry cleaning agents, insecticides, fungicides, anesthetics, low-temperature extractants and refrigerants, etc., trans 1,2-dichloro Ethylene is a new type of environmentally friendly organic solvent. Due to the wide application of trans-1,2-dichloroethylene, its preparation has also become a very concerned issue in the chemical industry. [0003] In the existing equipment, when the crude synthetic material is rectified, because the mother liquor has str...

AI Technical Summary

Problems solved by technology

[0004]In the existing equipment for preparing dichloride, because the acetylene gas fed into the synthesis tower, its internal moisture content and impurity content need to meet the process requirements, most of the existing technologies use Sulfuric acid purification method, sodium hypochlorite purification method and chlorine water purification method, these methods all need to introduce new chemical substances, which will increase the pressure on enterprises to deal with the three wastes

Images