SOLVENT EXTRACTION RECOVERY OF METALS USING QUINOLINE DERIVATIVE

摘要

SOLVENT EXTRACTION RECOVERY OF METALS USING QUINOLINE DERIVATIVE A novel procedure is described for stepwise, selective extraction of metal values selected from molybdenum, copper, cobalt and zinc, using a substituted 8-hydroxyquino-line as solvent extraction reagent. By controlling the equilibrium pH and other extraction conditions, it is possible to stepwise, selectively extract molybdenum and copper from aqueous, acidic solutions containing these along with other metal values. Where cobalt and/or zinc are also present, these can also be stepwise selectively extracted using the same reagent. It was previously believed that the substituted 8-hydroxyquinolines were selective only for copper over a wide pH range.