Recovery of N-hydrocarbylthiophosphoric triamides and N-hydrocar

Details Recovery of N-hydrocarbylthiophosphoric triamides and N-hydrocar Recovery of N-hydrocarbylthiophosphoric triamides and N-hydrocar

1997-01-21

1999-09-21

O'Sullivan, Peter

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C07F 922

Patent

active

059556307

ABSTRACT:
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 about 60 to about 140.degree. 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.

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patent: 5079380 (1992-01-01), Thunberg
L. A. Cates; "Phosphorus-Nitrogen Compounds. XI. Phosphamidase Studies. I. Unsubstituted Amides.sup.1,2 "; J. Med Chem., vol. 13, 1970; pp. 301-302.
M. Goehring, et al.; "Uber Phosphor-Stickstoffverbindungen, I. Mitteil.: Zur Kenntnis der Amide der Phosphorsaure und der Thiophosphorsaure"; Chem. Ber., No. 7, 1956; pp. 1768-1774.
Kendall, et al; "Addition Compounds of Ammonia With The Ammonium Halides"; J. Amer. Chem. Soc., 1920, vol. 42; pp. 1141-1145.
Yamamoto, et al., "Measurement of Heat of Mixing for Ammonium Chloride + Ammonia System at 25.degree. C"; The Canadian Journal of Chemical Engineering, vol. 66, 1988; pp. 127-130.
Abe, et al., "Regarding The Solubility of Di- And Trichlorides In Liquid Ammonia (Part 3) Solubility Of Ammonium Chloride And Vapor Pressure Of Its Solution"; 1935; J. Soc. Chem. Ind. Japan, vol. 38, pp. 1402-1406.

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