Production method for increasing purity of chlorobenzene and used floating valve-type chlorination tower

Abstract

The invention discloses a production method for increasing the purity of chlorobenzene and a used floating valve-type chlorination tower.A production method of the chlorobenzene comprises the steps that chlorine gas, excessive anhydrous benzene and small amount of iron trichloride are introduced into the floating valve-type chlorination tower for reaction, during the reaction, the tower is heatedto maintain the temperature in the tower near the boiling point of benzene, and meanwhile the mixture in the tower is stirred; and washing, neutralization, extraction, separation and distillation areconducted to obtain the chlorobenzene with high purity. The floating valve-type chlorination tower comprises a tower body, a drain pipe is connected to the bottom of the tower body, a benzene transmission pipe and a chlorine transmission pipe are connected to the peripheral side wall of the tower body, a waste gas recovery pipe is connected to the top of the tower body, a floating valve is installed in the waste gas recovery pipe, an electric heating plate is installed on the inner side wall of the tower body, and a stirring mechanism is rotatably installed in the tower body. According to theproduction method for increasing the purity of chlorobenzene and the used floating valve-type chlorination tower, the yield and purity of the chlorobenzene are improved, the reaction environment is closed and controllable, the toxic gas emission is reduced,and green and environment protection and non-pollution are achieved.

Description

technical field [0001] The invention relates to the technical field of chlorinated benzene production, in particular to a production method for improving the purity of chlorinated benzene and a floating valve type chlorination tower used. Background technique [0002] Chlorinated benzene, an organic compound. Colorless transparent liquid, with unpleasant bitter almond smell, insoluble in water, soluble in most organic solvents such as ethanol, ether, chloroform, carbon disulfide, benzene, etc. This compound is toxic, depresses and anesthetizes the central nervous system; irritates the skin and mucous membranes. It also pollutes surface water, soil, atmosphere and drinking water. In industry, it is mainly used as an important raw material for organic synthesis, and is widely used in the field of organic synthesis. In the traditional production of chlorinated benzene, ferric chloride is used as a catalyst to chlorinate benzene directly. However, the traditional chlorinated...

AI Technical Summary

Problems solved by technology

However, the traditional chlorinated benzene production method is relatively backward, and the production equipment has not been improved, resulting in a low synthesis rate of chlorinated benzene, low production capacity, and low purity

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