Continuous production process of atrazine

A technology of atrazine and production process, applied in the field of chemical synthesis and continuous production of atrazine, can solve the problem that it is difficult to meet the needs of customers for high-quality products, not suitable for industrialized large-scale production applications, and product quality fluctuations Large and other problems, to achieve the effect of controllable product particle size, reduced labor intensity, and good production stability

Inactive Publication Date: 2017-10-10
HEBEI CHENGXIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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...

Method used

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  • Continuous production process of atrazine

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Add quantitative cyanuric chloride and 10 times the mass of toluene to the cyanuric chloride dissolving tank, stir and dissolve at -10~-5°C, and obtain a homogeneous solution for later use;

[0025] (2) Control the flow rate of cyanuric chloride solution at 10T / h, and the flow rate of isopropylamine (99.6% content) at 0.29T / h, and pump them into the first-stage single-group static mixer respectively, and enter the first-stage after mixing Fully react in the tubular reactor, then accurately pump the 15% sodium hydroxide aqueous solution into the second-stage single-group static mixer at a flow rate of 1.32T / h, and mix it with the output liquid from the first-stage tubular reactor before entering Fully react in the two-stage tubular reactor, the temperature is strictly controlled at -5~0°C during the reaction process, and the residence time of each stage is 280s. The outlet of the secondary tubular reactor was sampled by GC to detect that the reaction end point was 0....

Embodiment 2

[0030] (1) Add quantitative cyanuric chloride and 5 times the mass of toluene to the cyanuric chloride dissolving tank, stir and dissolve at -5~0°C to obtain a homogeneous solution for subsequent use;

[0031](2) Control the flow rate of cyanuric chloride solution at 18T / h, and the flow rate of isopropylamine (99.8% content) at 0.87T / h, and pump them into the first-stage double-group static mixer respectively, and enter the first-stage after mixing Fully react in the tubular reactor, then accurately pump the 5% sodium hydroxide aqueous solution into the second-stage double-group static mixer at a flow rate of 11.88T / h, mix with the output liquid from the first-stage tubular reactor, and then enter Fully react in the two-stage tubular reactor. During the reaction, the temperature is strictly controlled at 5-10°C, and the residence time of each stage is 80s. The outlet of the secondary tubular reactor was sampled by GC to detect that the reaction end point was cyanuric chloride ...

Embodiment 3

[0036] (1) Add quantitative cyanuric chloride and 15 times the mass of toluene to the cyanuric chloride dissolving tank, stir and dissolve at 0~5°C, and obtain a homogeneous solution for subsequent use;

[0037] (2) Control the flow rate of cyanuric chloride solution at 16T / h and the flow rate of isopropylamine (99.7% content) at 0.29T / h, and pump them into the first-stage three sets of static mixers respectively, and enter the first-stage after mixing Fully react in the tubular reactor, then accurately pump the 30% sodium hydroxide aqueous solution into the second-stage three-group static mixer at a flow rate of 0.66T / h, mix with the output liquid from the first-stage tubular reactor, and then enter Fully react in the two-stage tubular reactor. During the reaction, the temperature is strictly controlled at 15-20°C, and the residence time of each stage is 30s. The outlet of the secondary tubular reactor was sampled by GC to detect that the reaction end point was 0.016% cyanuri...

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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...

Claims

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Application Information

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IPC IPC(8): C07D251/50
CPCC07D251/50
Inventor 张辰亮董浩浩李静程丽华董津王晓龙郗凌霄姚立国刘少华申银山
Owner HEBEI CHENGXIN
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