METHOD OF RECOVERY OF LITHIUM FROM MAGNESIUM CHLORIDE SOLUTIONS Russian patent published in 1997 - IPC

FIELD: hydrometallurgy of rare alkali metals. SUBSTANCE: in order to recover lithium from chloride solutions, Fr containing tributyl phosphate (Fe_org= 0.2-0.6M) is used with addition of carboxylic acid. The amount of organic phase during recovery process is as high as 33.5 g/l. Re-recovery of lithium from organic phase is accomplished with 4-6 M hydrochloric acid solution. In this case, iron remains in the organic phase, and lithium content in the reextract is as high as 15-20 g/l. EFFECT: more efficient recovery method.