METHOD OF PRODUCING LITHIUM CARBONATE FROM LITHIUM-CONTAINING SOLUTION AND INSTALLATION FOR ITS IMPLEMENTATION Russian patent published in 2025 - IPC C01D15/08 C22B26/12 C22B3/24 B01D15/00 B01D61/02 F25B15/16 

FIELD: chemistry.

SUBSTANCE: invention relates to production of lithium carbonate from lithium-containing solution, including from natural brines and water, process solutions and waste water of various industries, and installation for its implementation. Sorption and desorption stages of lithium-containing solution are performed to obtain an eluate. Concentrate purified from impurities is obtained from the eluate, followed by precipitation of the concentrate to obtain a precipitate and a mother solution and separation of the precipitate and the mother solution. PH of the mother solution from the concentrate precipitation step is adjusted to 1.01-3.0, preferably to 1.3-2.5, more preferably to 1.4-2.0, most preferably to 1.9 and fed for mixing with lithium-containing solution before feeding it to step sorption and desorption of lithium-containing solution.

EFFECT: inventions make it possible to increase the efficiency of the process of producing lithium, with high extraction of lithium from lithium-containing solutions, including from solid wastes of the process of extracting lithium, obtaining battery-grade lithium carbonate, as well as increasing the sorbent effective operation life, increasing the sorbent service life.

33 cl, 4 dwg, 2 tbl