Method for converting ammonium thiocyanate into potassium thiocyanate

Abstract

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, photographic industry, pesticide and steel analysis, can be coordinated with iron ions to form blood red complex ions, is commonly used for identifying iron ions and the like, can also be used for manufacturing mustard oil and drugs, and is also convenient for enterprise production.

Description

Technical field [0001] The present invention belongs to the field of potassium thiocyanate production technology, specifically relates to a method of converting ammonium thiocyanate to potassium thiocyanate. Background [0002] Potassium thiocyanide, commonly known as potassium rose redate, potassium rose palmate, is an inorganic substance, the chemical formula is KSCN, mainly used for synthetic resins, insecticides, mustard oil, thioureas and drugs, etc., can also be used as a chemical reagent, is a common indicator of iron ions (Fe3+), after addition to produce blood red flocculent complex; also used to prepare thiocyanate (thiocyanide) solution, detection of iron ions, copper and silver, urine testing, tungsten color developer, capacity of the legal titanium indicator; can be used as a refrigerant, photographic thickener However, the existing potassium thiocyanide is inconvenient to prepare and is not suitable for enterprise production. [0003] In order to solve the above pr...

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Problems solved by technology

[0002] Potassium thiocyanate, commonly known as potassium roseate and potassium roseate, is an inorganic substance with a chemical formula of KSCN. It is mainly used in synthetic resins, insecticides, mustard oil, thioureas and drugs, etc. It can also be used As a chemical reagent, it is a common indicator of iron ions (Fe3+), and it will produce blood-red flocculent complexes after being added; it is also used to prepare thiocyanate (thiocyanide) solutions, test iron ions, copper and silver, and urine Liquid inspection, tungsten chromogenic agent, indicator of volume-stated titanium; it can be used as refrigerant and photographic thickening agent; but the existing potassium thiocyanate is inconvenient to prepare and is not suitable for enterprise production

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