Liquid membrane processes for gallium recovery from alkaline solutions

摘要: Gallium is an important material in the semiconductor industry. Intermetallic compounds with gallium have applications as high-temperature rectifiers and transistors, solar batteries, other devices where photovoltaic effect can be used. In this paper, authors examine possibility of using membrane extraction supported liquid membranes to recover from alkaline solutions. Membrane proves alternative process such liquors. order maximize mass transfer, highly hydrophilic should used both stripping processes. The optimum composition extractant 10--15% Kelex 100, 10% n-decanol, 5% Versatic 10, kerosene (vol %). highest permeability was obtained when feed solution contained about 1.5 mol/l sodium hydroxide. failed transport because instability. dominant mechanisms for failure are considered spontaneous formation a water-in-oil emulsion precipitates, causing pore obstruction.