Studies of Collectors. VIII. The Flotation of the Gallium Ion with Oxine-Type Surfactants

Article abstract of DOI:10.1246/bcsj.60.2327

Oxine-type surfactants(5-alkanoyl-8-quinolinol, RnOx, n=2, 8, 12, 18) and R12OOx were prepared and used as ion-flotation collectors.Cu²⁺, Fe³⁺, Zn²⁺, and Pb²⁺ were floated with R12Ox around a neutral pH, and the selective removal of Cu²⁺ from the mixture of these four metal ions was observed at pH 1.0.The floatability of Ga³⁺ was also high around the neutral pH, and the selective Ga³⁺ flotation from an Al³⁺(100 ppm)-Ga³⁺(20 ppm) mixture was observed by using R8Ox in the pH regions of 3-4 and 10-13.3 (0.2 M NaOH soln), while R12Ox did not float the Ga³⁺ so much at pH 10-13.3.By the addition of a small amount of RnPy to the R12Ox or by the solvent sublation, an effective flotation of Ga³⁺ was observed in the pH range of 10-13.3.The Ga³⁺ flotation was superior to the Ga³⁺ extraction in pH 2-4.However, in a strong alkaline region the flotability was lower than the extractability.