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Processing of steel rinse waters through coextraction and selective stripping
Author(s) -
LoboRecio M. A.,
Alguacil F. J.,
LópezDelgado A.
Publication year - 2004
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.10110
Subject(s) - stripping (fiber) , extraction (chemistry) , chemistry , phase (matter) , chromatography , nuclear chemistry , analytical chemistry (journal) , materials science , organic chemistry , composite material
Recovery of iron(III), HNO 3 , and HF from stainless steel rinse waters by liquid–liquid extraction using Cyanex‐923 extractant was studied. The influence of equilibration time, temperature, V aq /V org phase ratios, and extractant concentrations on the extraction of iron(III) was investigated. Furthermore, the separate extraction of HNO 3 and HF by Cyanex‐923 was also studied. Conditions for the coextraction of iron(III), HNO 3 , and HF were established as: 30 min of contact, 20°C, V aq /V org phase ratio of 1 and using undiluted Cyanex‐923 (water presaturated) as extractant. Under the appropriate experimental conditions, water is effective for the selective stripping of the three extracted solutes. © 2004 American Institute of Chemical Engineers AIChE J, 50: 1150–1155, 2004
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