Production method of 2,3-dichloro-1-propene compound and production device of production method of 2,3-dichloro-1-propene compound

Abstract

The invention belongs to the technical field of production of compounds, and discloses a production method of a 2,3-dichloro-1-propene compound and a production device of the production method of the2,3-dichloro-1-propene compound. Liquid caustic soda and a catalyst are added into 1,2,3-trichloropropane, under a heating condition, the 1,2,3-trichloropropane is transformed into 2,3-dichloro-1-propene with a content higher than 90%, and the 2,3-dichloro-1-propene with the content higher than 90% is subjected to continuous rectification or batch rectification to produce 2,3-dichloro-1-propene with a content higher than 99%. A product produced through the production method of the 2,3-dichloro-1-propene compound and the production device of the production method of the 2,3-dichloro-1-propene compound is good in quality, high in yield and low in cost, therefore, the route method for producing the 2,3-dichloro-1-propene by means of the 1,2,3-trichloropropane, the liquid caustic soda and thecatalyst under the heating condition is suitable for large-scale popularization, a 2,3-dichloro-1-propene crude product can be obtained, the yield is higher than 98%, and the 2,3-dichloro-1-propene crude product is subjected to continuous rectification or batch rectification to produce 2,3-dichloro-1-propene with a content up to 99.8% or above.

Description

technical field [0001] The invention belongs to the technical field of compound preparation, and in particular relates to a preparation method of 2,3-dichloropropene compound and a preparation device thereof. Background technique [0002] At present, the closest existing technology: 2,3-dichloropropene, which is the second most efficient, low-toxic, and broad-spectrum insecticide in the global sales volume Raw material of pesticide intermediate 2-chloro-5-chloromethylthiazole. [0003] Thiamethoxam is the best of these products. As an important intermediate of thiamethoxam, 2-chloro-5-chloromethylthiazole has a promising market prospect. However, 2,3-dichloropropene is used as a raw material for the production of 2-chloro-5-chloromethylthiazole and tetrachloropropene, and its sales volume is increasing year by year. [0004] Thiamethoxam has insecticidal properties, but thiamethoxam and intermediates have problems such as low content, dark color, and high cost, resulting i...

AI Technical Summary

Problems solved by technology

[0007] In summary, the problems in the prior art are: thiamethoxam and intermediates have problems such as low content, dark color, and high cost, making it difficult to popularize

And in the prior art, 2,3-dichloropropene is obtained by rectification and the obtained product quality of the route is poor, and the yield is low

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