Clark & Elbing LLP
Glyphosate dimethylamine salt crystal, preparation method and use thereof
This invention provides the herbicidal active ingredient, a dimethylamine salt crystal of N-phosphonomethyl glycine (glyphosate), its preparation process and a solid formulation containing the crystalline dimethylamine salt of glyphosate as well as its application. Said preparation process comprises adding glyphosate and a suitable amount of solvent into a conventional reactor and introducing a dimethylamine gas for reaction, wherein the reaction temperature is controlled between 5 and 90° C. After the completion of the reaction, the temperature is reduced slowly to a certain value, a crystalline dimethylamine salt of glyphosate is precipitated (or precipitated after a crystal seed is added).
ZHEJIANG WYNCA CHEMICAL INDUSTRY GROUP CO., LTD.
C A C C A C
C07F A01N C07F C07C A01N C07B
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Huiling Wei Zhigang Shuguang Tao Long Yaxian Bufan
She Wang Qian Zhou Liu Qin Zhang Ren