Glyphosate synthesis technology and device

A synthesis process and synthesis device technology, applied in the field of glycine-based glyphosate catalytic synthesis method and its device, can solve the problems of increasing mother liquor production, affecting economic benefits, increasing environmental protection pressure, etc., to achieve reaction advantages, depolymerization Thorough reaction, improved yield and quality

Pending Publication Date: 2020-03-06
HUBEI TAISHENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The yield of the traditional process is low, which not only affects the economic benefits, but also increases the production of mother liquor and the pressure on environmental protection

Method used

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  • Glyphosate synthesis technology and device
  • Glyphosate synthesis technology and device
  • Glyphosate synthesis technology and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1. Depolymerization reaction: first put paraformaldehyde into the depolymerization kettle (the degree of polymerization of paraformaldehyde is 30), open the valve of the pipeline connecting the depolymerization kettle to the tail gas system, pass steam through the jacket, and heat and dehydrate at 80°C for 2 minutes . After the dehydration is completed, add methanol (the molar ratio of methanol to paraformaldehyde is controlled at 0.5:1), stir evenly, add a methanol solution of sodium methoxide to the mixed solution, and depolymerize quickly at room temperature in 30 seconds to form high Active methanol solution of anhydrous formaldehyde, after depolymerization is completed, add methanol until the molar ratio of paraformaldehyde to alcohol is 1:6.

[0044] The molar ratio control of sodium methylate and formaldehyde (paraformaldehyde mole number is calculated as formaldehyde): one hundred per million.

[0045] When the degree of polymerization of the paraformaldehyde i...

Embodiment 2

[0052] 1. Depolymerization reaction:

[0053] First put paraformaldehyde into the depolymerization kettle (the degree of polymerization of paraformaldehyde is 35), open the valve of the pipeline connecting the depolymerization kettle to the tail gas system, pass steam through the jacket, heat and dehydrate at 70°C for 3 minutes, and then add Ethanol (the molar ratio of methanol to paraformaldehyde is controlled at 0.6:1), stir evenly, add methanol solution of lithium methoxide to the mixed solution, and depolymerize naturally at 30°C for 20s to generate highly active anhydrous formaldehyde ethanol solution; after depolymerization, add ethanol until the molar ratio of paraformaldehyde to alcohol is 1:7.8.

[0054] The molar ratio control of lithium methylate and formaldehyde (the molar number of paraformaldehyde is calculated as formaldehyde): 200 parts per million.

[0055] 2. Addition reaction:

[0056] After the depolymerization is completed, add triethylamine to the mixed...

Embodiment 3

[0062] 1. Depolymerization reaction: use the purchased methanol solution of anhydrous formaldehyde as the formaldehyde raw material, add the methanol solution of catalyst potassium methoxide into the alcohol solution of anhydrous formaldehyde, and react for 20 seconds; after depolymerization, add methanol to the paraformaldehyde and alcohol The molar ratio is 1:2.2.

[0063] The molar ratio control of described potassium methylate and formaldehyde (the molar number of paraformaldehyde is calculated in formaldehyde): 5 parts per million.

[0064] 2. Addition reaction: After the depolymerization is completed, add triethylamine to the mixed solution, then add glycine, stir evenly, control the reaction temperature at 50°C, and the reaction time for 35 minutes. The addition reaction occurs under the action of nascent alkoxy groups and formaldehyde and hemiacetal molecules. After the addition reaction is over, the mixed solution is rapidly heated to 65°C, kept for 18s, then cooled ...

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Abstract

Provided is a glyphosate synthesis technology. The glyphosate synthesis technology is characterized in that a metal alkoxide organic compound is adopted as a catalyst for glyphosate synthesis and particularly for depolymerization and addition during glyphosate synthesis. The glyphosate synthesis technology includes the following steps: an alcohol and paraformaldehyde are mixed and stirred to be uniform, the catalyst is added into a mixture solution or directly added into an alcohol solution of formaldehyde, and a transparent mixture solution is generated; triethylamine and glycine are added into the transparent mixture solution, stirring is conducted to carry out an addition reaction, and after the addition reaction is finished, dimethyl phosphite is added into the mixture solution to carry out a condensation reaction; and after the condensation reaction is finished, hydrochloric acid is added into the mixture solution to carry out hydrolysis, and then through crystallization, washingand drying, glyphosate is obtained. According to the technical scheme of the glyphosate synthesis technology, the specific catalyst is adopted, therefore, glyphosate synthesis reaction speed and selectivity are improved, reaction speeds of depolymerization and addition are high, the reactions are conducted completely, the final yield of a glyphosate product obtained through the glyphosate synthesis technology is increased by 3% or above compared with the final yield of a glyphosate product obtained through traditional technologies, and thus the glyphosate synthesis technology has a reaction advantage, an energy-saving advantage, a coat advantage and an environment-friendly advantage.

Description

technical field [0001] The invention belongs to the technical field of glyphosate production, in particular to a catalytic synthesis method of glyphosate by a glycine method and a device thereof. Background technique [0002] Glyphosate is a high-efficiency, low-toxicity, broad-spectrum, and herbicide of systemic conduction type. There are two mainstream production methods, one is the production method using iminodiacetic acid (IDA) as the raw material, and the other is the production method using The production method of glycine and alkyl phosphite as raw materials. The foreign companies dominated by Monsanto basically adopt the iminodiacetic acid method for production. my country's glyphosate production started in the 1980s. In 1987, Shenyang Research Institute of Chemical Industry launched the glycine-alkyl ester method to synthesize glyphosate with glycine and dimethyl phosphite as the main raw materials. Calculated) from the initial stable 65% to about 75%. The glyc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/38
CPCC07F9/3813
Inventor 田义群徐森军杨爱兵曹杰胡波
Owner HUBEI TAISHENG CHEM
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