Process for producing chloroactic acid by large chlorinated kettles and chlorinated kettles for reaction

Abstract

The invention discloses a process for producing a chloroactic acid by large chlorinated kettles. Three chlorinated kettles of 'two main chlorinated kettles and one auxiliary chlorinated kettle' are utilized, a tail gas which is discharged after main chlorinated kettles are subjected to a chlorination reaction is fed into the auxiliary kettle for the chlorination reaction, after the chlorination reaction, a chlorinated liquid is obtained, the chlorinated liquid is subjected to crystallization and separation to obtain the chloroactic acid, an acetic acid and a catalyst are added into the main kettles, the main kettles are jacketed and heated to 85 DEG C, and a chlorine gas is fed into the main kettles in three stages for the continuous chlorination reaction. The invention simultaneously discloses the chlorinated kettles used for the process. The process for producing the chloroactic acid by the large chlorinated kettles and the chlorinated kettles used for the process have the advantages that a reasonable production process is provided for chloroactic acid production by the large chlorinated kettles, the structure of the chlorinated kettles is improved, thereby the chlorination reaction can be fully and uniformly performed, the reaction time is shortened, a large-scale production requirement is met, the productivity and the product quality are improved, the amplification effect of chemical industry production is avoided, the product purity can reach to above 98%, the yield coefficient based on the acetic acid can reach to 91%, and the product quality reaches to the export product standard.

Description

technical field [0001] The invention relates to a production process of chloroacetic acid and a reaction device thereof, in particular to a process for producing chloroacetic acid with a large chlorination kettle and a chlorination kettle used for the reaction. Background technique [0002] At present, the scale of domestic chloroacetic acid production equipment is relatively small, there are a large number of workshop production, the technology is backward, the average annual production capacity is several thousand tons, and there are few 10,000-ton level equipment. Compared with foreign large-scale equipment, domestic production equipment is small, resulting in poor product specification stability, high production cost per unit of product, and my country's chloroacetic acid products lack international competitiveness. [0003] Although the production of chloroacetic acid is common in China, the size of the chlorination tank is 2-5m 3 , the industry has not seen 20 ~ 25m ...

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Problems solved by technology

[0005] Purpose of the invention: for the problems referred to above, purpose one of the present invention is to provide a kind of technique of producing chloroacetic acid by large-scale chlorination still, overcome the shortcoming of uneven reaction, poor product quality, long reaction time; Another purpose of the present invention is to provide A large chlorination kettle used in the chlorination reaction of this process, so that chlorine gas and feed liquid can fully react

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