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Vol. 26 No. 18 (2014): Vol 26 Issue 18

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Precipitation Conditions of Chevreul's Salt Using (NH4)2SO3 from Synthetic Aqueous CuSO4 Solutions

https://doi.org/10.14233/ajchem.2014.16785
Turan Calban
Department of Chemical Engineering, Atatürk University, TR-25240, Erzurum, Turkey
Burak Kaynarca
Department of Chemical Engineering, Atatürk University, TR-25240, Erzurum, Turkey
Fatih Sevim
Department of Chemical Engineering, Atatürk University, TR-25240, Erzurum, Turkey
Hayrettin Eroglu
Department of Chemical Engineering, Atatürk University, TR-25240, Erzurum, Turkey

Corresponding Author(s) : Turan Calban

turancalpan@atauni.edu.tr

Asian Journal of Chemistry, Vol. 26 No. 18 (2014): Vol 26 Issue 18

Abstract

In this study, synthetic aqueous CuSO4 solution at a particular concentration was prepared. Chevreul’s salt was precipitated using (NH4)2SO3 solutions prepared at various concentrations. (NH4)2SO3 solution was added drop by drop to the synthetic aqueous CuSO4 solution. Chevreul’s salt was characterised by XRD and SEM analysis. The effects of parameters such as (NH4)2SO3 concentration, temperature, stirring speed and reaction time were investigated on precipitation of Chevreul’s salt. 2n factorial experimental design and orthogonal central composite design methods in the precipitation experiments were used. It was observed that the most effective parameters on the precipitation of Chevreul’s salt were the temperature and the stirring speed. The obtained optimum conditions on maximum copper precipitation were: the (NH4)2SO3 concentration 0.4 M, the temperature at 60 °C, the stirring speed was at 700 rpm and 15 min for reaction time. The chosen stationary parameters at the initial stage of the reaction were concentration of CuSO4 solution 0.25 M and pH 4. Under these optimum conditions, the precipitated copper was 98.4 %.

Keywords

Chevreul’s salt Copper Factorial experimental design Orthogonal central composite experimental design
Calban, T., Kaynarca, B., Sevim, F., & Eroglu, H. (2014). Precipitation Conditions of Chevreul’s Salt Using (NH4)2SO3 from Synthetic Aqueous CuSO4 Solutions. Asian Journal of Chemistry, 26(18), 6111–6117. https://doi.org/10.14233/ajchem.2014.16785
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