Patents by Inventor Yaxian Zhang

Yaxian Zhang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Glyphosate dimethylamine salt crystal, preparation method and use thereof
    Patent number: 9221853
    Abstract: 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).
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: December 29, 2015
    Assignee: ZHEJIANG WYNCA CHEMICAL INDUSTRY GROUP CO., LTD.
    Inventors: Wei Wang, Shuguang Zhou, Long Qin, Bufan Ren, Zhigang Qian, Tao Liu, Huiling She, Yaxian Zhang
  • GLYPHOSATE DIMETHYLAMINE SALT CRYSTAL, PREPARATION METHOD AND USE THEREOF
    Publication number: 20150307528
    Abstract: 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).
    Type: Application
    Filed: October 25, 2010
    Publication date: October 29, 2015
    Applicant: ZHEJIANG WYNCA CHEMICAL INDUSTRY GROUP CO., LTD.
    Inventors: Wei Wang, Shuguang Zhou, Long Qin, Bufan Ren, Zhigang Qian, Tao Liu, Huiling She, Yaxian Zhang