Patent ID: 9493491
Filing Date: 2016-11-15
CPC Classification: C07B,C07F

Claim Text:
1. A process for the preparation of thiophosphoric triamides by reacting thiophosphoryl chloride with at least one primary or secondary amine in an inert solvent with the aid of at least one unpolar amine as an auxiliary base, comprising the following steps: a) reacting the auxiliary base with the hydrogen chloride formed during the reaction, with formation of a chloride salt; b) reacting the chloride salt formed in step a) with ammonia, which accepts the hydrogen chloride with liberation of the auxiliary base; c) extracting the mixture obtained in step b) with water or an aqueous medium, wherein ammonium chloride formed dissolves in the aqueous phase and the solution of the product of value in the inert solvent and the auxiliary base form at least one separate nonaqueous phase; and d) removing by distillation of at least some of the inert solvent from the at least one nonaqueous phase obtained in step c), to form two nonmiscible liquid phases.