Process for producing dimethyl...

C - Chemistry – Metallurgy – 07 – F

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C07F 9/40 (2006.01) A01N 57/20 (2006.01)

Patent

CA 2247850

The present invention relates to an integrated process for synthesizing dimethyl (2,2,2-trichloro-1-hydroxyethyl)-phosphonate and a process for impregnating the dimethyl (2,2,2-trichloro-1-hydroxyethyl)- phosphonate on to inert carrier granules. The process involves adding dimethyl phosphite to a reaction mixture containing chloral under anhydrous, inert conditions. The molar ratio of chloral to dimethyl phosphite used in the reaction mixture is from about 1.0:1.0 to about 1.1:1Ø The impregnation process involves transferring molten dimethyl (2,2,2-trichloro-1-hydroxyethyl)-phosphonate into a process vessel and discharging weighed aliquots into a formulation vessel to form a granular product containing dimethyl (2,2,2-trichloro-1-hydroxyethyl)-phosphonate.

La présente invention concerne un procédé intrégré pour synthétiser du (2,2,2-trichloro-1-hydroxyéthyl)-phosphonate de diméthyle et un procédé pour imprégner des granules porteurs inertes avec ce (2,2,2-trichloro-1-hydroxyéthyl)-phosphonate de diméthyle. Ce procédé comprend l'addition de phosphite de diméthyle à un mélange réactionnel contenant du chloral, dans des conditions anhydres et inertes. La fraction molaire de chloral et de phosphite de diméthyle utilisés dans ce mélange réactionnel se situe dans la gamme allant d'environ 1,0:1,0 à environ 1,1:1,0. Le procédé d'imprégnation comprend le transfert du (2,2,2-trichloro-1-hydroxyéthyl)-phosphonate de diméthyle fondu dans une cuve de traitement et l'addition d'aliquots pesés de ce produit dans une cuve de formulation afin de former un produit granulaire renfermant du (2,2,2-trichloro-1-hydroxyéthyl)-phosphonate de diméthyle.

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