Recovery of n-hydrocarbyl(thio)phosphoric triamides from...

Details Recovery of n-hydrocarbyl(thio)phosphoric triamides from... Recovery of n-hydrocarbyl(thio)phosphoric triamides from...

C - Chemistry, Metallurgy

07

F

C07F 9/22 (2006.01) C07F 9/02 (2006.01)

Patent

CA 2277998

N-hydrocarbylthiophosphoric triamide is separated or recovered from a liquid mixture comprising N-hydrocarbylthiophosphoric triamide, inert organic solvent, and optionally but preferably, tertiary amine, by continuously introducing a stream of the liquid mixture into a wiped film evaporator operating at a temperature in the range of 60 to 140 ~C, and at a pressure that avoids solids formation on the heating surface of the wiped film evaporator, and continuously collecting the resultant N- hydrocarbylthiophosphoric triamide product.

L'invention concerne la séparation ou la récupération de triamide N-hydrocarbylthiophosphorique à partir d'un mélange liquide renfermant du triamide N-hydrocarbylthiophosphorique, un solvant organique inerte, et, éventuellement, mais de préférence, une amine tertiaire, par introduction en continu d'un flux du mélange liquide dans un évaporateur à film essuyé fonctionnant à une température comprise entre 60 et 140 ·C, et à une pression permettant d'éviter la formation de solides sur la surface de chauffe de l'évaporateur à film essuyé, et par recueil en continu du triamide N-hydrocarbylthiophosphorique obtenu.

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