METHOD AND DEVICE FOR SALT EXTRACTION Russian patent published in 2020 - IPC B09B3/00 C01D3/08 C01F11/32 

FIELD: chemical or physical processes.

SUBSTANCE: invention relates to extraction of chloride salts of sodium, potassium, chlorine and calcium. Method of extracting salts includes the following steps: obtaining a starting material which, when brought into contact with water, forms an aqueous solution containing Na, K, Cl and, optionally, Ca, treating said starting material to the enriched aqueous solution having a concentration of CaCl₂ of at least 15 % by weight, and separating said solid mixture of NaCl and KCl from said enriched aqueous solution to obtain a lean aqueous solution containing Ca and Cl ions in form of basic solutes. Device for extracting salts contains: input section and section of first stage, containing treatment device and separator of salt mixture.

EFFECT: invention enables separation and extraction of commercial degree of purity from CaCl₂, NaCl and/or KCl from their mixtures using an efficient and energy-efficient method.

52 cl, 21 dwg, 2 tbl