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Title:
METHOD FOR PREPARING SOLID POWDER OF L-GLUFOSINATE AMMONIUM FREE OF CRYSTAL WATER
Document Type and Number:
WIPO Patent Application WO/2022/237861
Kind Code:
A1
Abstract:
Provided is a method for preparing solid powder of L-glufosinate ammonium free of crystal water. The method comprises: (1) carrying out solid-liquid separation on an L-glufosinate conversion liquid obtained by carrying out biological catalytic conversion on D,L-glufosinate or 2-carbonyl-4-[hydroxy(methyl)phosphonyl]butyric acid to obtain a liquid fraction; (2) dehydrating and concentrating the liquid fraction obtained in step (1) to obtain a concentrate; (3) adding an alcohol solvent into the concentrate obtained in step (2) to obtain an alcohol-containing solution; (4) adjusting the pH value of the alcohol-containing solution obtained in step (3) to 7-9; and (5) cooling the pH-adjusted alcohol-containing solution obtained in step (4) until L-glufosinate ammonium crystals are separated out. In addition, also provided are solid and crystal forms of the L-glufosinate ammonium.

Inventors:
WU CHENGJUN (CN)
LUO ZHONGHUA (CN)
LI XIANHE (CN)
MENG XIANGQI (CN)
ZHANG CHEN (CN)
MAO CHUNHUI (CN)
Application Number:
PCT/CN2022/092388
Publication Date:
November 17, 2022
Filing Date:
May 12, 2022
Export Citation:
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Assignee:
YONGNONG BIOSCIENCES CO LTD (CN)
NINGXIA YONGNONG BIOSCIENCES CO LTD (CN)
International Classes:
C07F9/30; A01N57/20; A01P13/00; C12P13/04
Domestic Patent References:
WO2022024052A12022-02-03
WO2020214631A12020-10-22
Foreign References:
CN113831364A2021-12-24
CN111065270A2020-04-24
CN1143369A1997-02-19
CN105218579A2016-01-06
CN110452264A2019-11-15
CN111139270A2020-05-12
Attorney, Agent or Firm:
ZHONG LUN LAW FIRM (CN)
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