METHOD OF SEPARATION OF ZIRCONIUM FROM IRON Russian patent published in 1995 - IPC

FIELD: chemical technology. SUBSTANCE: zirconium is extracted with 5-20% solution of trialkylbenzylammonium fluoride in organic solvent from the aqueous solutions of ammonium or alkaline metal hexafluorozirconate at zirconium concentration 0.2-30 g/l and at hydrofluoric acid concentration 0.1-2.55N, and iron is remained in aqueous phase. From organic phase zirconium is reextracted with 10-20% solution of hydrofluoric acid or a mixture containing 10% ammonium fluoride and 10% hydrofluoric acid. After extraction organic phase is washed with 0.1-2.55N solution of hydrofluoric acid. Method is used for preparing of zirconium fluoride of high purity used in fibre optics. EFFECT: improved method of zirconium and iron separation. 3 cl, 1 tbl