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Catalyst-free ametryn production method

A production method, the technology of arazine, which is applied in the field of catalyst-free arazine production, can solve the problems of long reaction cycle, large amount of waste water, easy pollution of the environment, etc., achieve good economic and social benefits, reduce environmental pressure, reduce The effect of raw material costs

Pending Publication Date: 2018-07-31
ZHEJIANG ZHONGSHAN CHEM IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, almost all the synthetic methods of atrazine at home and abroad use atrazine as the starting material. Disadvantages such as easy to pollute the environment
2) sodium methyl mercaptide method: just as this method disclosed by CN104447594A and CN103467401A, some water is used as a solvent, and a large amount of waste water can be produced after the reaction finishes, which brings a lot of environmental protection pressure to waste water treatment, both of which need to use more expensive Catalyst, will increase raw material cost
3) Sodium disulfide method: The method disclosed by CN1326931A has the disadvantages of low arazine content, long reaction cycle, and many impurities.
4) dimethyl sulfonate method: just as this method disclosed in CN101307030A, need to use more expensive dimethyl sulfonate raw material and trimethylamine catalyzer, also be to do solvent with water simultaneously, can generate a large amount of waste water after the reaction finishes, bring waste water treatment A lot of environmental pressure

Method used

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Effect test

Embodiment 1

[0022] A catalyst-free method for the production of ametryn is as follows:

[0023] Into a 1000ml pressure reactor, add 100g of 97% atrazine, 165g of 20% sodium methyl mercaptide, 200g of isopropanol, seal the pressure reactor, heat up to 110°C, the reaction pressure is 0.4MPa, and the reaction time is 2h After the reaction, the temperature was lowered, the layers were left to stand, the organic phase was distilled to recover the solvent, and the remaining molten material was put into a tray, cooled and crystallized to obtain 101 g of methionine, with a content of 97.2%.

Embodiment 2

[0025] A catalyst-free method for the production of ametryn is as follows:

[0026] In a 1000ml pressure reactor, add 100g of 97% atrazine, 165g of 20% sodium methyl mercaptide, 200g of isopropanol recovered from the above, seal the pressure reactor, heat up to 110°C, and the reaction pressure is 0.4MPa. After 2 hours of reaction, the temperature was lowered, the layers were left to stand, and the organic phase was distilled to recover the solvent. The remaining molten material was put into a tray, cooled and crystallized, and 100 g of arazine was obtained, with a content of 97.3%.

Embodiment 3

[0028] A catalyst-free method for the production of ametryn is as follows:

[0029] In a 1000ml pressure reactor, add 100g of 97% atrazine, 165g of 20% sodium methyl mercaptide, 200g of isopropanol, seal the pressure reactor, heat up to 120°C, the reaction pressure is 0.5MPa, and the reaction time is 2h After the reaction, the temperature was lowered, the layers were left to stand, the organic phase was distilled to recover the solvent, the remaining molten material was put into a tray, cooled and crystallized, 101.3 g of arazine, the content of which was 97.24%.

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Abstract

The invention discloses a catalyst-free ametryn production method. The production method comprises that in a pressurized reaction kettle, atrazine and sodium methyl mercaptide undergo a reaction in anorganic solvent according to a mole ratio of atrazine to sodium methyl mercaptide of 1: 1.01-1: 1.2 at 80-145 DEG C under pressure of 0.1-1MPa for 1-2h and the chemical reaction formula is shown in the description. The method utilizes a heating and sealed pressurization reaction process. Compared with the traditional ametryn synthesis method, the production method reduces a raw material cost, reduces the environmental pressure of treatment on a large amount of wastewater and has better economic and social benefits.

Description

technical field [0001] The invention relates to the field of herbicides, in particular to a catalyst-free production method of ametryn. Background technique [0002] Ametrazine is a selective systemic herbicide with rapid herbicidal action. Its principle of action is to inhibit photosynthesis and cause weeds to wither and die. It is mainly used to control weeds in dryland crops such as sugarcane, corn, pineapple and other crops. It was also found that the product has the effect of promoting plant growth at low concentrations. At present, almost all the synthetic methods of atrazine at home and abroad use atrazine as the starting material. Easy to pollute the environment and other disadvantages. 2) sodium methyl mercaptide method: just as this method disclosed by CN104447594A and CN103467401A, some water is used as a solvent, and a large amount of waste water can be produced after the reaction finishes, which brings a lot of environmental protection pressure to waste water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D251/52
CPCC07D251/52
Inventor 王涛李劲林炳安陈璐刘海飞孙则天刘佳伟
Owner ZHEJIANG ZHONGSHAN CHEM IND GRP
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