METHOD OF LITHIUM-CONTAINING SOLUTION TREATMENT FOR LITHIUM CARBONATE PRODUCTION Russian patent published in 2025 - IPC C01D15/08 C01D7/00 C01D7/22 C22B26/12 

FIELD: chemistry.

SUBSTANCE: invention relates to hydrometallurgy of lithium, particularly to a method of treating a lithium-containing solution to obtain lithium carbonate. Method includes a step of adding to a lithium-containing solution a complexing compound which forms soluble complex compounds with calcium and magnesium, Note here that proposed method comprises nanofiltration, reverse osmosis concentration, thermal concentration and lithium carbonate precipitation. Step of adding complexing compound to lithium-containing solution is carried out either before step of reverse osmosis concentration, or after reverse osmosis concentration step, or after thermal concentration step.

EFFECT: method provides an energy-efficient and reliable method for processing concentration of a lithium-containing solution to obtain lithium carbonate with a simple process scheme and with a low minimum content of impurities, which is characterized by a simple process scheme.

19 cl, 17 tbl, 1 ex