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Extraction of molybdenum(VI) from sulfate solutions by LIX 622
Author(s) -
Sastre Ana María,
Cahner Santiago,
Alguacil Francisco José
Publication year - 2000
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(200001)75:1<54::aid-jctb174>3.0.co;2-4
Subject(s) - chemistry , molybdenum , diluent , reagent , extraction (chemistry) , inorganic chemistry , aqueous solution , stoichiometry , exothermic reaction , aqueous two phase system , stripping (fiber) , ammonium hydroxide , ammonium sulfate , nuclear chemistry , chromatography , organic chemistry , electrical engineering , engineering
The application of LIX 622 (oxime derivative) as an extraction reagent of molybdenum (VI) from sulfate media was studied. The extraction system was studied as a function of contact time, temperature, aqueous pH, diluent of the organic phase and metal and extractant concentrations. The extraction is exothermic and it is dependent on the organic diluent, aqueous pH and reagent concentration. The data have been analysed numerically to determine the stoichiometry of extracted species and their equilibrium constants. It was found that molybdenum was extracted into the organic phase by a complex mechanism which involves the formation of three species (MoO 2 L 2 , MoO 4 H 3 HL + HSO 4 − and MoO 4 H 2 HL, where L represents the extractant). Molybdenum stripping by acidic and ammonium hydroxide solutions was also studied. © 2000 Society of Chemical Industry