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Glyphosate synthesis technology

A synthesis process, glyphosate technology, applied in the fields of compounds of group 5/15 elements of the periodic table, chemical instruments and methods, organic chemistry, etc., can solve the problems of unsuitability for large-scale production, complicated production process, and low production efficiency problems, to achieve the effect of improving the single-pass conversion rate and product yield, overcoming more processes, and improving work efficiency

Inactive Publication Date: 2016-06-01
QINGDAO SHOUTAI AGRI SCI & TECH CO LTD
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  • Abstract
  • Description
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Problems solved by technology

In the current glyphosate synthesis process method, the technical process is not easy to implement, the resulting glyphosate product has low purity, the single-pass conversion rate of reactants is low, the production process is complicated, the production efficiency is low and the cost is high, and it is not suitable for large-scale production.

Method used

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Embodiment

[0014] The synthesis technique of the glyphosate of the present embodiment may further comprise the steps:

[0015] (1) Depolymerization reaction: Carry out depolymerization reaction with methanol, triethylamine and paraformaldehyde at 40° C. for 55 minutes to obtain a depolymerization solution;

[0016] (2) Addition reaction: After cooling down to 52°C, add glycine to the depolymerization solution for addition reaction, and react at 42°C for 25 minutes until the addition reaction liquid is clear and the solid disappears;

[0017] (3) Cyclic dehydration treatment and regeneration of dehydrating agent: While continuing the addition reaction of the clarified addition reaction liquid, use 3A or 4A molecular sieves for cyclic dehydration treatment to obtain dehydration addition liquid; Nitrogen is regenerated, and the treated nitrogen is condensed to recover methanol and triethylamine, and the tail gas is emptied;

[0018] (4) Condensation reaction: add dimethyl phosphite to the ...

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Abstract

The invention discloses a glyphosate synthesis technology. The glyphosate synthesis technology comprises a depolymerization reaction process, an addition reaction process, a condensation reaction process, a hydrolysis reaction process and a crystallization process. The glyphosate synthesis technology solves the problem that the glyphosate synthesis condensation reaction cannot occur under the waterless conditions. In the addition reaction and condensation reaction processes, the reaction liquid is dehydrated through a dehydration device so that reaction product moisture is reduced, dimethyl phosphite consumption is reduced, a reaction yield is improved, raw materials are saved and a cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a synthesis process of glyphosate. Background technique [0002] Glyphosate is also known as Zhencao Ning, Roundup, Glyphosate, and Phosphonic Acid. The pure product is a non-volatile white solid with a specific gravity of 0.5. It melts at about 230°C and decomposes. The solubility in water at 25°C is 1.2%, insoluble in common organic solvents, and its isopropylamine salt is completely soluble in water. Glyphosate is non-flammable, non-explosive, stable in storage at room temperature, and has a corrosive effect on medium-carbon steel and tinplate (tinplate). Glyphosate is commonly used to control weeds in apple orchards, vineyards and tea plantations. In the current glyphosate synthesis process method, the technical process is not easy to implement, the resulting glyphosate product has low purity, the single-pass conversion rate of reactants is low, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/38
Inventor 张晶
Owner QINGDAO SHOUTAI AGRI SCI & TECH CO LTD
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