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Synthesis method of glyphosate

A synthetic method and technology of glyphosate, applied in chemical instruments and methods, compounds of group 5/15 elements of the periodic table, herbicides and algicides, etc. Problems such as long cycle and promotion, to achieve the effect of shortening the synthesis time, increasing the yield, and increasing the particle size

Inactive Publication Date: 2010-11-03
SUZHOU JIAHUI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process of the glycine route mainly includes: depolymerization, addition, condensation, hydrolysis and crystallization. Due to the variety and complexity of its synthesis reactions and some uncontrollable factors, the yield of glyphosate cannot be greatly improved. Improvement, longer production cycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The heat preservation time is shortened and the yield of glyphosate is increased by increasing the temperature of the glyphosate condensation reaction, which is characterized in that the increase of the temperature intensifies the reaction and promotes the completion of the reaction.

[0023] (1) Put 88kg of paraformaldehyde, 590kg of methanol and 140kg of triethylamine into the reaction kettle respectively, turn on the stirring device and control the temperature of the kettle at 30°C, and keep it warm for 0.5h to carry out the depolymerization reaction;

[0024] (2) After the depolymerization reaction is over, keep stirring, add 110 kg of glycine to the reaction kettle, open the jacket circulating water to control the temperature of the kettle to be 30° C., and keep the temperature for 2 hours to carry out the addition reaction;

[0025] (3) After the addition reaction is over, add 190kg of dimethyl phosphite into the reaction kettle, keep stirring and raise the tempera...

Embodiment 2

[0029] The heat preservation time is shortened and the yield of glyphosate is increased by increasing the temperature of the glyphosate condensation reaction, which is characterized in that the increase of the temperature intensifies the reaction and promotes the completion of the reaction.

[0030] (1) Put 95kg of paraformaldehyde, 620kg of methanol and 142kg of triethylamine into the reaction kettle respectively, turn on the stirring device and control the temperature of the kettle at 40°C, and keep it warm for 1h to carry out the depolymerization reaction;

[0031] (2) After the depolymerization reaction is over, keep stirring, add 115kg of glycine into the reaction kettle, open the jacket circulating water to control the temperature of the kettle to be 40°C, and keep the temperature for 1h to carry out the addition reaction;

[0032] (3) After the addition reaction is over, add 193 kg of dimethyl phosphite into the reaction kettle, keep stirring and raise the temperature to...

Embodiment 3

[0036] The heat preservation time is shortened and the yield of glyphosate is increased by increasing the temperature of the glyphosate condensation reaction, which is characterized in that the increase of the temperature intensifies the reaction and promotes the completion of the reaction.

[0037] (1) Put 98kg of paraformaldehyde, 650kg of methanol and 145kg of triethylamine into the reaction kettle respectively, turn on the stirring device and control the temperature of the kettle at 50°C, and keep it warm for 2h to carry out the depolymerization reaction;

[0038] (2) After the depolymerization reaction is over, keep stirring, add 120 kg of glycine to the reaction kettle, open the jacket circulating water to control the temperature of the kettle to be 50° C., and keep the temperature for 2 hours to carry out the addition reaction;

[0039] (3) After the addition reaction is over, add 195kg of dimethyl phosphite into the reaction kettle, keep stirring and raise the temperatu...

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PUM

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Abstract

The invention relates to a synthesis method of glyphosate, which comprises the following steps: (1) respectively pouring paraformaldehyde, methanol and triethylamine into a reaction kettle, controlling the temperature of the reaction kettle to be 30-50 DEG C, and reacting for 0.5-2h under stirring; (2) adding glycine into the reaction kettle, controlling the temperature of the reaction kettle to be 30-50 DEG C, and reacting for 0.5-2h under stirring; (3) adding dimethyl phosphite into the reaction kettle, controlling the temperature of the reaction kettle to be 55-65 DEG C, and reacting for 0.5-1.5h under stirring; (4) controlling the temperature of the reaction kettle to be 40-50 DEG C, adding hydrochloric acid into the reaction kettle, increasing the temperature of the reaction kettle to be 110-135 DEG C, and preserving the temperature and precipitating for 1-2h; and (5) after heat preservation and precipitating, cooling, crystallizing, carrying out suction filtration, and then, drying to obtain glyphosate raw powder. By increasing the temperature of condensation reaction, the invention shortens the synthesis time of the glyphosate and improves the yield of the glyphosate; and the obtained glyphosate raw powder has larger particles.

Description

technical field [0001] The invention relates to a synthesis method, in particular to a synthesis method of glyphosate. Background technique [0002] As a broad-spectrum herbicide, glyphosate has become the most widely used and produced pesticide product in the world due to its special herbicidal effect. In recent years, with the development of transgenic glyphosate-resistant crops, the amount of glyphosate has increased year by year. At present, the synthetic production of glyphosate mainly adopts two routes: IDA route and glycine route. Foreign glyphosate manufacturers mainly use the IDA route to produce glyphosate; domestic glyphosate manufacturers mostly use the glycine production route independently developed by my country. The production process of the glycine route mainly includes: depolymerization, addition, condensation, hydrolysis and crystallization. Due to the variety and complexity of its synthesis reactions and some uncontrollable factors, the yield of glyphos...

Claims

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Application Information

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IPC IPC(8): C07F9/38A01P13/00
Inventor 田晓宏李维华卫一龙朱晓东
Owner SUZHOU JIAHUI CHEM
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