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Separation of Cobalt and Nickel by Reactive Extraction – Modeling of Equilibria
Author(s) -
Manski R.,
Bart H.J.,
Bäcker W.,
Strube J.,
Traving M.,
Görge A.
Publication year - 2006
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.200600248
Subject(s) - cobalt , nickel , diluent , stoichiometry , extraction (chemistry) , chemistry , phase (matter) , thermodynamics , inorganic chemistry , chromatography , nuclear chemistry , organic chemistry , physics
FTIR analytics was used to estimate the complex stoichiometry when reactively extracting cobalt and nickel. Investigations were carried out at three distinct concentration levels at a Co‐to‐Ni ratio of 10. Additionally, the nonideal phase behavior in the system 2.4 M NaOH, phosphinic acid and diluent Escaid 120 was studied. Using the derived CoR 4 and NiR 4 complexes allows modeling of the reactive phase equilibria by applying the Pitzer model and the regular solution theory of Hildebrand and Scott.