Method for producing 2-dimethylamino-1, 3-dithiocyano-propane
A dithiocyano- and dimethylamino-based technology, which is applied in the field of synthesizing cartap intermediates, can solve the problems of low powder yield, low crystallization temperature, and long crystallization time of monosultap, and achieve long crystallization time and crystallization The effect of low temperature and easy crystallization
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[0018] The insecticidal monoammonium salt with a mass percentage content of 98% was prepared with water to form an insecticidal monoammonium salt aqueous solution with a mass concentration of 47.5%, stirred, adjusted to pH=10.25 with sodium hydroxide, and cooled to 10°C. Sodium cyanide is formulated into a sodium cyanide aqueous solution with a mass concentration of 12.5%; in the sodium cyanide aqueous solution, add dichloroethane, stir, and cool to 4°C, drop the insecticidal monoammonium salt aqueous solution, continue to stir and add dropwise Time: 60 minutes; keep at 4°C for 1.5 hours under stirring; let stand at room temperature until the layering stops, and then separate the upper and lower layers, the lower organic layer is dichloroethane and 2-dimethylamino-1,3 -Dithiocyano-propane, the upper inorganic layer is cyanide wastewater, which is subjected to centralized disinfection treatment.
[0019] Among them, the molar ratio of the three monomer feeds of i...
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