Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 60, Issue 2, Pages 174-179Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seppur.2007.08.006
Keywords
microemulsion; extraction; cobalt; cetyltrimethylammonium bromide
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The influences of the concentration of cosurfactant and surfactant on the water content of the microemulsion were studied, and the proper microemulsion extraction system has been obtained. Secondly, the effects of the concentration of CTMAB, pentanol, ammonium thiocyanate, sodium thiocyanate; and also the volume ratio of aqueous to microemulsion (R) and temperature on the extraction yield (E%) were investigated, the mechanism of the cobalt extraction was discussed. The extraction yield (E%) of nickel was much lower than cobalt, which make the separation of cobalt and nickel possible. In the stripping stage, the metals extracted in the microemulsion phase were precipitated by Na2CO3 solution and the microemulsions were recycled for further use. (c) 2007 Elsevier B.V. All rights reserved.
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