Method for preparing glyphosate

The invention discloses a method for preparing glyphosate. N- (Phosphonomethyl) iminodiacetic acid is in the oxygenation reaction with oxygen in the water medium in the presence of catalyzer such as activated carbon, the solid-liquid separation is performed after the reaction to obtain the crystal w...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	LIU XIAOHUA, FENG QIONGLEI, WANG WEN, ZHOU LIANG, XU GUOMING, LIU JINGWEI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM AGRICULTURE ANIMAL HUSBANDRY BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS FISHING FORESTRY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HUMAN NECESSITIES HUNTING METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PEST REPELLANTS OR ATTRACTANTS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PLANT GROWTH REGULATORS PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR RELEVANT APPARATUS TRANSPORTING TRAPPING
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Beschreibung
Zusammenfassung:	The invention discloses a method for preparing glyphosate. N- (Phosphonomethyl) iminodiacetic acid is in the oxygenation reaction with oxygen in the water medium in the presence of catalyzer such as activated carbon, the solid-liquid separation is performed after the reaction to obtain the crystal with glyphosate and the filter cake with activated carbon, the reaction mother liquor is in the later process; the filter cake is added in the glyphosate saturated solution, after heating and dissolving the activated carbon is separated from the glyphosate solution, the glyphosate solution is cooled and crystallized, after separation the solid glyphosate product and the filter solution are obtained, the filter cake is made into the glyphosate saturated solution; the reaction mother liquor passes through a barrier separation device, the glyphosate in the mother liquor is separated from the by-product such as formaldehyde, the glyphosate mother liquor is recycled in the oxygenation reaction, or used as the glyphosate