METHOD OF OBTAINING LITHIUM CONCENTRATE FROM LITHIUM-BEARING NATURAL BRINES AND PROCESSING THEREOF INTO LITHIUM CHLORIDE OR LITHIUM CARBONATE Russian patent published in 2018 - IPC C01D15/04 C01D15/08 

FIELD: chemistry.

SUBSTANCE: invention can be used in chemical industry. Method for obtaining a lithium concentrate from natural lithium brines and processing said concentrate into lithium chloride or lithium carbonate comprises preparation of a primary lithium concentrate from a natural lithium brine by sorption enrichment of the natural lithium brine in sorption-desorption modules consisting of columns filled with a fixed bed of a granular sorbent based on chlorine-containing varieties of a double hydroxide of aluminum and lithium. Primary lithium concentrate is converted to a secondary lithium concentrate by concentration in evaporative pools or reverse-osmotic concentration-desalination. Secondary lithium concentrate is used for further production of lithium chloride or lithium carbonate.

EFFECT: invention increases recovery of lithium chloride during sorption enrichment of natural lithium brines, improves the quality of lithium chloride and lithium carbonate obtained, widens the range of lithium-bearing hydromineral raw materials suitable for the production of lithium compounds, by using lithium-bearing natural brines containing suspended particles.

4 cl, 4 dwg, 7 tbl, 8 ex