A method for separating potassium and sodium in mixed chloride salts containing potassium and sodium

Abstract

The invention relates to a potassium and sodium-containing mixed chlorine salt potassium and sodium separating method. The potassium and sodium-containing mixed chlorine salt potassium and sodium separating method comprises mixing sodium perchlorate and mixed chlorine salt to converting contained potassium into potassium perchlorate and further to achieve separation of potassium and sodium; duringpreparation, potassium chloride in the potassium and sodium-containing mixed chlorine salt can react with the sodium perchlorate to produce the potassium perchlorate low in solubility, so that the potassium perchlorate and sodium chloride can be separated. According to the potassium and sodium-containing mixed chlorine salt potassium and sodium separating method, the purity of the separated potassium perchlorate is higher than 97%, and that of the sodium chloride is higher than 90%.

Description

technical field [0001] The invention relates to the technical field of potassium and sodium separation in potassium and sodium mixed salts, in particular to a method for separating potassium and sodium in mixed chloride salts containing potassium and sodium. Background technique [0002] Chemical production and smelting waste will generate a large amount of solid waste. The stacking of solid waste not only occupies a large amount of land, but also leaches harmful components from the waste through rain and snow, polluting the soil and, in severe cases, polluting the groundwater. Solid waste in water bodies will cause serious water pollution and damage to aquatic biological resources, and even pose a threat to flood control and drainage and certain water conservancy and water transportation projects. Powdery solid waste, flying with the wind, pollutes the atmosphere. With the continuous growth of the economy, the continuous expansion of the production scale, and the continuou...

AI Technical Summary

Problems solved by technology

Ion exchange and chromatography need to consume a large amount of expensive solvents, resulting in high production costs

[0004] CN102448885A discloses a separation and extraction device and separation and extraction method for sodium and potassium. It adopts a combination of multi-stage cooling crystallization and conversion absorption to separate potassium chloride and sodium bicarbonate. This patent is applied to sodium, potassium, and chlorine. Mixed solution, and the process is longer and consumes more energy

[0005] CN103555969A discloses a new method for separating potassium and sodium. The t-BAMBP xylene system is used to extract the sodium hydroxide solution of potassium carbonate and sodium carbonate to separate potassium and sodium. The method produces a large amount of raffinate and washing liquid, and Contains a large amount of organic matter, which is dangerous to the environment

The sodium salt and potassium salt separation method uses the above separation system to treat the wastewater containing sodium salt and potassium salt, and can obtain mutually separated sodium salt crystals and potassium salt crystals, but the process of this scheme is complicated and the separation efficiency is insufficient.

[0008] Although the above-mentioned documents disclose some methods for separating potassium and sodium in mixed salts, there are still defects in the separation process, such as high energy consumption, complex equipment, high cost and insufficient product purity. The separation method of mixed chloride salts with high potassium and sodium content is still of great significance

Images