METHOD OF PRODUCING LITHIUM HYDROXIDE MONOHYDRATE BY BIPOLAR ELECTRODIALYSIS FROM CALCIUM CHLORIDE BRINES AND PLANT FOR REALIZING SAID METHOD Russian patent published in 2025 - IPC C01D15/02 C22B26/12 C02F1/28 C02F1/42 C02F1/44 C02F1/469 C02F1/66 C02F1/72 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical engineering and specifically to a method and a device for producing lithium hydroxide monohydrate from natural calcium chloride brines by bipolar electrodialysis. Method includes energy-efficient methods of purification and electrochemical conversion during processing of hydromineral raw material in the plant. Plant includes initial brine aeration device, its filtration device, installation for sorption extraction of lithium, nanofiltration device, including at least one membrane filter for nanofiltration, reverse osmosis concentration device, including at least one semipermeable membrane, device for ion-exchange cleaning from boron, electrodialysis concentration device, comprising ion-exchange membranes and at least two electrodes, device for ion-exchange purification from calcium and magnesium, bipolar membrane electrodialysis, including bipolar membranes and at least two electrodes, solid phase separation device, washing device and drier.

EFFECT: obtaining high-purity lithium hydroxide monohydrate.

20 cl, 2 dwg, 10 ex