Production process of refined potassium chloride

Abstract

The invention discloses a production process of refined potassium chloride, in particular to a process for refining 90% potassium chloride into more than 97% food grade potassium chloride. The process comprises the following steps of: adding 90% potassium chloride into a potassium chloride saturated solution (circulating solution) at room temperature to obtain a supersaturated solution; filtering the supersaturated solution by using a coarse filter, heating to 100-105 DEG C, and fully dissolving potassium chloride; filtering the high temperature saturated solution by using a heat insulating filter to obtain a refined saturated solution; cooling and crystallizing the refined saturated solution by a vacuum cooling crystallizer, dewatering by a centrifugal machine, and drying by a drying bed to obtain refined food grade potassium chloride, and returning the mother solution separated from the centrifugal machine back to the system to be used as a circulating solution. The method can be used for effectively removing soluble impurities and insoluble substances in the 90% potassium chloride product, and the content of the product achieves more than 97% and reaches the standard of food grade potassium chloride. The invention has the advantages of simple equipment, short process flow, no environment pollution and easy realization of industrialization.

Description

technical field [0001] The invention relates to a potassium chloride production process, in particular to a refined potassium chloride production process for refining potassium chloride into edible potassium chloride. Background technique [0002] With the continuous improvement of people's living standards, while people get delicious food, they also consume excessive amounts of sodium chloride, resulting in high incidence of high blood pressure, heart disease, kidney disease and other diseases in my country, especially in the north. Low-sodium salt is a new generation of edible salt with health-care effects. Long-term consumption is beneficial to the balance of sodium, potassium, and magnesium ions in the human body, and has obvious effects on preventing high blood pressure. In the 1980s, low-sodium salt has been sold well in foreign markets, but in my country, low-sodium salt products have not been widely used in ordinary people's homes due to their high prices. In the pa...

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However, due to the need to evaporate

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