Production method of 2,3-dichloro-1-propene compound and production device of production method of 2,3-dichloro-1-propene compound
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A dichloropropene and preparation device technology, applied in 2 fields, can solve problems such as low yield, high cost, and poor product quality, and achieve high yield, low cost, and good quality
Pending Publication Date: 2020-02-04
湖南莱万特化工有限公司
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[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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preparation example Construction
[0041] like figure 1 As shown, the preparation method of 2,3-dichloropropene compound provided by the embodiments of the present invention includes:
[0042] S101: Transport the epoxy high-boiler to the epoxy high-boiler light component distillation tower through a vacuum pump and a delivery pump, and then pass it into steam for heating, remove the light component and go to the tank area, and transport the still liquid in the light component distillation tower The 1,2,3-trichloropropane is separated from the heavy component rectification column, and then enters the product storage tank.
[0043] S102: First put the metered 1,2,3-trichloropropane into a dry and clean reaction kettle, then put in the catalyst while stirring, heat it, and start to slowly add liquid caustic soda from the feeding hole, slowly each time Add liquid caustic soda dropwise. After all the caustic soda is added, stir for 2 hours, and take samples for analysis.
[0044]S103: The peak of the raw material ...
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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...
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