Continuous production process of atrazine

Abstract

The invention relates to the technical field of a continuous production process of atrazine and discloses a continuous production process of atrazine. The continuous production process comprises the following steps: simultaneously pumping a cyanuric chloride solution and isopropamide into a first-stage mixer and a first-stage pipe reactor for reaction; pumping sodium hydroxide into a second-stage mixture, mixing sodium hydroxide with a material liquid to obtain a mixture, and introducing the mixture into a second-stage tubular reactor for reaction; pumping monoethyl amine into a third-stage mixer, mixing monoethyl amine with the material liquid to obtain a mixture, and introducing the mixture into a third-stage pipe reactor for reaction; pumping sodium hydroxide into a four-stage mixer, mixing sodium hydroxide with the material liquid to obtain a mixture, and introducing the mixture into a four-stage pipe reactor for reaction; and after the reaction, separating the material liquid by virtue of an oil-water separator, carrying out a saline dehydration section, carrying out desolvation on an organic phase by virtue of an evaporator, and carrying out centrifugation, and drying, so as to obtain the product. According to the process, the continuous production of atrazine is realized, the production stability, the product quality and the production efficiency are improved, and the yield can reach above 99%; and the process has very high economic and social benefits.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to the technical field of a continuous production process of atrazine. Background technique [0002] Atrazine is a triazine herbicide. It is a special herbicide for corn, sugarcane, sorghum, etc. It can control annual grass weeds, especially for broad-leaved weeds. It can also be combined with a variety of amides Compound herbicides into a mixture, which greatly enhances the herbicidal activity and scope of application. [0003] The synthesis of atrazine has two kinds of process routes of organic solvent method and water method. In CN201210208717.6, methyl ethyl ketone is used as solvent, the reaction time is longer, the content can reach 98.6%, and the yield can reach 97.5%; in CN201110339825.2, toluene and co-solvent OP-10 are used for reaction, and the content can reach 98.5% , the yield can reach 97.5%; Yan Haichang used chlorobenzene as solvent in "Hangzhou Chemi...

AI Technical Summary

Problems solved by technology

Domestic and foreign production mostly adopts organic solvent method and batch production, which requires a lot of equipment, mainly manual operation, many people, low labor efficiency, and large fluctuations in product quality, which makes it difficult to meet customers' needs for high-quality products

[0004] In CN201510357625.8, Nanjing University of Technology proposed a microreactor synthesis process, which is a semi-continuous synthesis process combining a microreactor and a flask. First, the microreactor is reacted, and finally introduced into the flask to react with alkali for 2 hours. The operation is cumbersome, although its The conversion rate of atrazine in the reaction solution can reach 97%, but no solid product can be obtained, and the product quality cannot be determined; moreover, it is only a small amount of theoretical research and development, which is not suitable for industrial production and application of tens of thousands of tons.

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