Glufosinate-ammonium clean production process and method thereof

Abstract

The invention relates to a glufosinate-ammonium clean production process and a method thereof, in particular to a glufosinate-ammonium salt reaction liquid purification and refining (including desalination, decoloration, concentration and the like) method, which adopts the combined process of electrodialysis desalination, ultrafiltration decoloration, activated carbon decoloration, evaporation, concentration and crystallization, nanofiltration and concentration, NOC advanced oxidation, evaporation, crystallization, salt separation, reverse osmosis concentration and the like. The glufosinate-ammonium salt reaction liquid does not need to be diluted and directly enters electrodialysis desalination, the desalinated liquid is subjected to ultrafiltration decolorization and activated carbon decolorization, and the method is suitable for desalination decolorization treatment of various glufosinate-ammonium ammonolysis reaction liquids. Compared with the prior art, the method has the advantages of short process flow, low equipment material requirement, investment saving, low operation cost, energy saving, water saving, small occupied area, few control points, simplicity in operation, convenience in realizing automatic control, high product recovery rate, stable and reliable product quality and the like.

Description

technical field [0001] The invention relates to the technical field of pesticide production, and in particular provides a clean production process and method for glufosinate-ammonium. Background technique [0002] Glufosinate-ammonium belongs to the hypophosphorous acid class of high-efficiency, low-toxicity, environment-friendly non-conductive herbicides. Because it is easy to degrade in the soil, safe for crops, not easy to drift, has a broad herbicidal spectrum, high activity, low dosage, and low environmental pressure, it is the best pesticide variety to replace glyphosate and paraquat. [0003] Glufosinate-ammonium was first successfully developed in the 1980s by Hoechst (later owned by Bayer), and various synthetic routes have gradually emerged since then. There are many domestic and foreign patent literature reports on the synthesis method of glufosinate-ammonium, mainly including the following: 1. High-pressure catalytic synthesis method, 2. Abuzov synthesis method,...

AI Technical Summary

Problems solved by technology

[0012] The methods for treating the glufosinate-ammonium reaction solution disclosed in the above patents have the following defects: 1) No matter whether the ultrafiltration treatment or the nanofiltration treatment is performed first, the glufosinate-ammonium reaction stock solution must be diluted, which increases the The processing capacity of the membrane increases equipment investment and operating costs; 2) Except for the patent CN110577554A, the methods disclosed in other patents can only desalinize the glufosinate-ammonium reaction stock solution, and cannot decolorize it at the same time. To achieve industrial application, other equipment and processes are needed for decolorization

Although the method disclosed in the patent CN110577554A first adopts ultrafiltration for decolorization, and then nanofiltration for desalination, which can achieve the goal of industrial application, but the process is lengthy, the equipment investment is large, the energy consumption is high, the area is large, and the operation is cumbersome.

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