Effect of the Bromo-Group in 5-Octyloxymethyl-8-quinolinol on the Solvent Extraction of Molybdenum(VI) from Strongly Acidic Solutions

Abstract

The extraction behavior of molybdenum(VI) (Mo(VI)) with 5-octyloxymethyl-8-quinolinol (HO₈Q) and 5-octyloxymethyl-7-bromo-8-quinolinol (HBrO₈Q) from strongly acidic solutions was investigated. Mo(VI) was quantitatively extracted with 1.0 x 10^-3 M HBrO₈Q from 7 M HNO₃ aqueous solution into chloroform. The extractability of HBrO₈Q for Mo(VI) was higher than that of HO₈Q. It was demonstrated that the introduction of the bromo-group at the 7-position of HO₈Q was very effective in enhancing the extractability for Mo(VI) from strong acid solutions. The selective extraction of Mo(VI) from nitric acid solution containing various metal ions was accomplished by the proposed method.