Method and device for producing 3,4-dichloronitrobenzene through continuous kettle type reaction

Abstract

The invention relates to the field of chemical production and particularly discloses a method and device for producing 3,4-dichloronitrobenzene through a continuous kettle type reaction. According to the method, parachloronitrobenzene serves as a raw material. The method is characterized in that parachloronitrobenzene and ferric trichloride are prepared into mixed liquor, the mixed liquor enters reaction kettles continuously through a nitro compound pump, and meanwhile chlorine enters the bottom of a chlorination kettle; under the catalyst effect, parachloronitrobenzene and chlorine react to generate 3,4-dichloronitrobenzene; later, by the utilization of the high-order difference among all the reaction kettles, the materials overflow sequentially to enter the reaction kettles connected in series, enter a storage tank finally, and then enter a static mixer through a mixing pump to be mixed with water, multiple washing kettles are connected in series, and qualified materials enter a crude product tank. The process is easy to operate, high in automatic control level, low in production cost, high in stability, safe to operate and suitable for large-scale industrial production, and effectively saves labor, and the purpose of continuously chlorinating and washing 3,4-dichloronitrobenzene is achieved.

Description

(1) Technical field [0001] The invention relates to the field of chemical production, in particular to a method and a device for producing 3,4-dichloronitrobenzene by continuous tank reaction. (2) Background technology [0002] 3,4-Dichloronitrobenzene is an intermediate of various dyes, pigments, medicines, pesticides and fine chemical products. The market demand is 30,000 tons per year. At present, batch reactor reaction is adopted in China. Auxiliary operations such as loading and unloading are required in the production process of batch reactor. The labor intensity is high, and it is easy to cause the loss of materials and energy. The production cost increases, the production cycle is prolonged, and the product quality is not easy to be stable. Batch kettle production is not suitable for large-scale production and cannot meet market demand. (3) Contents of the invention [0003] In order to make up for the deficiencies of the prior art, the present invention provides...

AI Technical Summary

Problems solved by technology

The market demand is 30,000 tons per year. At present, batch reactor reaction is adopted in China. Auxiliary operations such as loading and unloading are required in the production process of batch reactor. The labor intensity is high, and it is easy to cause the loss of materials and energy. The production cost increases, the production cycle is prolonged, and the product quality is not easy to be stable

Batch kettle production is not suitable for large-scale production and cannot meet market demand

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