Method for converting ammonium thiocyanate into potassium thiocyanate

The invention belongs to the technical field of production of potassium thiocyanate, and particularly relates to a method for converting ammonium thiocyanate into potassium thiocyanate, which comprises the following steps: carrying out pressurized synthesis reaction on carbon dioxide and ammonia water to produce ammonium thiocyanate and ammonium hydrosulfide, decomposing the ammonium hydrosulfide into hydrogen sulfide through desulfurization evaporation, and removing the hydrogen sulfide to obtain the potassium thiocyanate. Slowly adding a potassium carbonate solution when the liquid temperature is 100 DEG C to generate potassium thiocyanate; the method is used for preparing thiourea and mustard oil, preparing electroplating liquid and the like. The refrigerant is used as a refrigerant and a steel analysis reagent. The method is also used for producing dyes and drugs. The refrigerant is used as a deplating agent and a refrigerant in the electroplating industry. The complex can be used in dye industry, photogr