Jiangsu Agro Farm Chemical Co., Ltd

Production Processes of Glufosinate Ammonium VS Glyphosate

 
1. Introduction
Glufosinate ammonium and glyphosate are two commonly used herbicides extensively applied in agricultural production. This article will provide a detailed overview of the production processes of glufosinate ammonium and glyphosate, including raw material selection, reaction steps, process flow, and product purification.

2. Production Process of Glufosinate Ammonium
2.1 Raw Material Selection
The main raw materials for glufosinate ammonium production include para-aminophenol, cyanuric chloride, and a certain proportion of ammonia water. Para-aminophenol is a key raw material in synthesizing glufosinate ammonium, while cyanuric chloride acts as a reactant with para-aminophenol to form intermediates.

2.2 Reaction Steps
The synthesis of glufosinate ammonium is primarily divided into three steps: intermediate preparation, condensation reaction, and crystallization purification.

- Intermediate Preparation: Para-aminophenol is first suspended in a suitable solvent in a reaction vessel, and a catalyst is added for stirring and heating. Cyanuric chloride is then slowly added to the reaction vessel to maintain the reaction temperature within the appropriate range for the reaction to proceed.

- Condensation Reaction: After intermediate preparation, it undergoes a condensation reaction with ammonia water. The intermediate is dissolved in a suitable solvent, and a certain proportion of ammonia water is added for stirring and heating. By controlling the reaction conditions and time, the synthesis of glufosinate ammonium reaches an optimal state.

- Crystallization Purification: After the condensation reaction, the glufosinate ammonium solution undergoes a crystallization purification process. Impurities are first removed through cooling and filtration operations to obtain relatively pure glufosinate ammonium solid. Then, the solid is washed with an appropriate washing agent to remove residual impurities. Finally, the ultimate glufosinate ammonium product is obtained through drying or other means.

3. Production Process of Glyphosate

3.1 Raw Material Selection
The main raw materials for glyphosate production are methylaminophenol, trichloromethane, and phosphoryl dichloride. Methylaminophenol is a key raw material in synthesizing glyphosate, while trichloromethane and phosphoryl dichloride act as reactants with methylaminophenol to form intermediates.

3.2 Reaction Steps
The synthesis of glyphosate includes four main steps: intermediate preparation, condensation reaction, crystallization purification, and product refinement.

- Intermediate Preparation: Methylaminophenol is dissolved in a suitable solvent in a reaction vessel, and a catalyst is added for stirring and heating. Trichloromethane and phosphoryl dichloride are then slowly added to the reaction vessel to maintain the reaction temperature within the appropriate range for the reaction to proceed.

- Condensation Reaction: After intermediate preparation, it undergoes a condensation reaction with a suitable solvent and alkaline catalyst. By controlling temperature, pH value, and reaction time, the synthesis of glyphosate reaches an optimal state.

- Crystallization Purification: After the condensation reaction, the glyphosate solution undergoes a crystallization purification process similar to that of glufosinate ammonium.

- Product Refinement: To improve the purity and quality of glyphosate products, additional refinement steps such as solvent extraction, activated carbon adsorption, and crystallization re-purification are carried out to further remove residual impurities and enhance product purity.

4. Conclusion
Glufosinate ammonium and glyphosate are two important herbicides that play crucial roles in agricultural production. This article has provided a detailed overview of the production processes of glufosinate ammonium and glyphosate, including raw material selection, reaction steps, process flow, and product purification. By effectively controlling reaction conditions and employing appropriate process flows, high-quality glufosinate ammonium and glyphosate products can be efficiently synthesized.


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    Name: Kim Gong

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