METHOD OF PREPARING DIFFICULTLY SOLUBLE COMPOUNDS Russian patent published in 1998 - IPC

FIELD: electrochemical processes. SUBSTANCE: invention relates to electrochemical solution processing methods and may be employed in hydrometallurgy to recover acids from process solutions, in waste water treatment, and in fractional separation of elements. Method consists in introducing mother liquor from chemical deposition step into anode and cathode chambers of electrodialyzer and depositing metal in cathode chamber, into which initial acidic solution is fed with rate ensuring desired pH value. In such a way, productivity of process increases because of increased rate of product deposit separation and increased content of main substance in the deposit. Quality of deposit is also improved as well as metal-acid separation degree. Power consumption is reduced. EFFECT: enhanced efficiency of process. 1 tbl