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Solvent extraction with LIX 973N for the selective separation of copper and nickel
Author(s) -
Alguacil Francisco José,
Cobo Antonio
Publication year - 1999
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/(sici)1097-4660(199905)74:5<467::aid-jctb60>3.0.co;2-7
Subject(s) - nickel , copper , chemistry , extraction (chemistry) , ammonium carbonate , stripping (fiber) , inorganic chemistry , data scrubbing , ammonia , copper extraction techniques , hydrometallurgy , nuclear chemistry , chromatography , materials science , organic chemistry , waste management , engineering , composite material
Abstract LIX 973N diluted with Iberfluid was used to co‐extract copper and nickel from ammoniacal/ammonium carbonate aqueous media. The influence of equilibration time, temperature, equilibrium pH and extractant concentration on the extraction of both metals has been studied. It was observed that neither copper nor nickel extraction is sensitive to temperature and equilibrium pH, however nickel extraction equilibrium is reached at a longer contact time (20 min) than that of copper (5 min), in addition nickel extraction depends greatly on the extractant concentration in the organic phase. For a solution containing 3 g dm −3 each of copper and nickel and 60 g dm −3 ammonium carbonate, conditions were established for the co‐extraction of both metals, ammonia scrubbing and selective stripping (with H 2 SO 4 ) of nickel and copper. Using the appropriate extractant concentration the yield (extraction stage) for both metals is near 100%, whereas the percentage of nickel and copper stripping is also almost quantitative. © 1999 Society of Chemical Industry