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Study of the amine primene 81R sulphate-Fe2(SO4)3 extraction equilibrium system at low temperatures |
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| Institution: | 1. Key Laboratory of Polyoxometalate Science, Department of Chemistry, Northeast Normal University, Changchun 130024, PR China;2. Department of Chemistry, Changchun Normal University, Changchun 130032, PR China;1. Department of Musculoskeletal Imaging. CHU de Besancon, 25000 Besancon, France;2. Laboratoire d’Anatomie, Université de Bourgogne–Franche-comté, 25000 Besancon, France;3. Clinical investigation center. INSERM CIT808. CHU de Besancon, 25000 Besancon, France;4. Department of Diagnostic and Interventional Radiology. Lausanne University Hospital, 1011 Lausanne, Swizerland;5. Nanomedecine Laboratory inserm EA 4662, Université de Bourgogne–Franchecomté, 25000 Besancon, France |
| Abstract: | The extraction of iron(III) from aqueous sulphate solutions by Primene 81R sulphate at low temperatures was studied as a function of iron(III) and amine sulphate concentrations. In the range of temperatures between 8 and 5°C a complex with the stoichiometric formula 4(RNH3)2SO4·Fe(OH)SO4]2 is extracted. The extraction reaction may occur by adduct formation between the amine sulphate and the species Fe(OH)SO4]2 from the aqueous phase and not by an anion exchange reaction. The extracted complex is a monomer in benzene solution; the spectral study suggests that the Fe(OH)]4+2 unit is present in its structure and the sulphate groups act as bidentate ligands. |
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