METHOD FOR LITHIUM SORPTION EXTRACTION FROM LITHIUM-CONTAINING BRINES

Invention relates to lithium sorption recovery from natural brines and wastewaters. The method comprises introducing a feed lithium-containing brine to a sorption-desorption concentrating module in a form of a vertically mounted column filled with an inorganic granulated sorbent being a chlorine-containing lithium aluminum double hydroxide. After the sorption, residual lithium-containing feedstock is drained from the column, then washing is made at a rate of at least 6 column volumes per hour in the amount of 150-250% of the sorbent volume, in the same direction as of the feed lithium-containing brine flow. Then lithium desorption from the sorbent is performed with desalinated water in the same direction as of the feed lithium-containing brine flow to obtain a lithium enriched solution. The obtained solution containing almost pure lithium chloride can be concentrated. The method results in reduced lithium losses with the washing solution and increased purity of the target LiCl concentrate.