Development and Evaluation of a Laboratory-scale Continuous Circuit for the Extraction of Copper With Emulsion Membranes.
Paper in Hydrometallurgy and Electrometallurgy of Copper 1991 :15 pages
The U.S. Bureau of Mines investigated the use of surfactant- stabilized liquid-emulsion membranes in a laboratory-scale continuous circuit for the extraction of cu from relatively dilute heap-leach solutions. The continuous circuit used simple equipment designs for all units, and the formulation of the emulsion membranes was optimized so that the emulsions had good stability during extraction but were broken with relatively mild conditions in an electrical coalescer. Typical tests yielded nearly 90-pct cu extraction and good membrane stability (membrane swelling < 3 pct; membrane leakage < 0.1 pct). Extractant decomposition occurred; however, regeneration of the oxime extractant was possible with a hydroxylamine salt.
Paper in Hydrometallurgy and Electrometallurgy of Copper, 1991, PP. 155-169