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1. WO1996040696 - PREPARATION OF AMMONIUM GLYPHOSATE USING AQUEOUS AMMONIUM HYDROXIDE IN A LIQUID-SOLID REACTION SYSTEM

Publication Number WO/1996/040696
Publication Date 19.12.1996
International Application No. PCT/US1996/003081
International Filing Date 05.03.1996
Chapter 2 Demand Filed 02.01.1997
IPC
C07F 9/38 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
FACYCLIC, CARBOCYCLIC, OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
9Compounds containing elements of Groups 5 or 15 of the Periodic System
02Phosphorus compounds
28with one or more P-C bonds
38Phosphonic acids ; Thiophosphonic acids
CPC
C07F 9/3813
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
9Compounds containing elements of Groups 5 or 15 of the Periodic System
02Phosphorus compounds
28with one or more P—C bonds
38Phosphonic acids RP(=O)(OH)2; Thiophosphonic acids ; , i.e. RP(=X)(XH)2 (X = S, Se)
3804not used, see subgroups
3808Acyclic saturated acids which can have further substituents on alkyl
3813N-Phosphonomethylglycine; Salts or complexes thereof
Applicants
  • MONSANTO COMPANY [US]/[US]
Inventors
  • DAY, Thomas, McCabe
  • GILLESPIE, Jane, Laura
  • KRAMER, Richard, Melvyn
  • LINDEMANN, Ralph, Elmer, Jr.
Agents
  • WAACK, Janelle, D.
  • BOSCH, Henry, A.
Priority Data
472,15207.06.1995US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PREPARATION OF AMMONIUM GLYPHOSATE USING AQUEOUS AMMONIUM HYDROXIDE IN A LIQUID-SOLID REACTION SYSTEM
(FR) PREPARATION DE GLYPHOSATE D'AMMONIUM A L'AIDE D'HYDROXYDE D'AMMONIUM AQUEUX DANS UN SYSTEME DE REACTION LIQUIDE-SOLIDE
Abstract
(EN)
Solid N-phosphonomethylglycine or glyphosate acid is charged to a substantially closed system and then partially pre-dried as by continuously recirculating it through a hot air grinding/drying system. A cooled solution of ammonium hydroxide is then metered into and reacted with the partially dried glyphosate acid as it is being recirculated in a manner such that the moisture content of the reaction mass so formed is continuously decreased throughout the reaction. Following completion of the ammonium hydroxide addition, a powdered reaction mass/product having a moisture content of about 2 wt.% is formed. Significantly, at this stage, the ammonium glyphosate product is suitable for end use and it can be readily dissolved in water and immediately used as a herbicide or plant growth regulator. More importantly, however, this product is capable due to its highly sorptive character to be further formulated into a product exceptionally highly loaded with adjuvants and particularly surfactants.
(FR)
On charge du N-phosphonométhylglycine ou de l'acide de glyphosate dans un système sensiblement fermé, avant de les pré-sécher partiellement par un système de séchage/broyage à l'air chaud, assurant leur recirculation continue. Une solution refroidie d'ammoniac est ensuite dosée, puis versée dans l'acide de glyphosate partiellement séché avec lequel il réagit, lors de sa recirculation, de telle manière que la teneur en humidité de la masse de réaction ainsi formée est continuellement réduite au cours de la réaction. Après avoir ajouté l'ammoniac, on obtient une réaction pulvérulente masse/produit dont la teneur en humidité est d'environ 2 % en poids. De manière significative, à ce stade, le produit de glyphosate d'ammonium peut être utilisé comme produit final. En effet, il peut se dissoudre rapidement dans l'eau et être immédiatement utilisé comme désherbant ou régulateur de la croissance des plantes. Toutefois, compte tenu de sa très forte capacité de sorption, ce produit peut être ensuite formulé en un produit fortement chargé d'adjuvants et, en particulier, d'agents tensio-actifs.
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