Recovery of copper powders from leach solutions containing copper by means of ammonia, sulphur dioxide and acetonitrile

Çolak, Sabri; Çalban, Turan; Yeşilyurt, Murat Kadir; Sergili, Demet; Ekinci, Zafer

doi:10.1016/s0032-5910(03)00135-9

Cited by 11 publications

(2 citation statements)

References 8 publications

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“…The results of the analysis of variance are given in Table-3. A first model with interaction terms was chosen to fit the experimental data: Y = b0 + b1X1 + b2X2 + b3X3 + b4X4 + b5X1X2 + b6X1X3 + b7X2X3 + b8X2X4 + b9X3X4 (7) As seen from Table-3, variance analysis results showed curvature effect. According to these results, the regression firstmodel was obtained as following: %YCu = 92.40 -1.25 X1 + 4.96 X2 + 1.77 X3 + 1.25 X4 + 0.46 X1X2 + 1.92 X1X3 + 1.40 X1X4-1.13 X2X3 -1.14 X2X4 -0.94 X3X4 (at 95 % confidence interval) (8) Copper precipitated as copper ammonium sulphite from solution: (α ≥ 0.075) (YCu) (%), % YCu = 92.40 -1.25 X1 + 4.96 X2 + 1.77 X3 + 1.25 X4 + 1.92 X1X3 + 1.4 X1X4 (at 99 % confidence interval)…”

Section: Resultsmentioning

confidence: 99%

Statistical Modelling of Precipitation of Copper Ammonium Sulphite from Synthetic Copper Sulphate Solutions

Demir¹

2014

Asian J. Chem.

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Obtaining copper compounds from aqueous solutions is widely realized with a chemical reaction. They have been produced from aqueous solutions through various technologies. These methods are electrowinning, reduction, segmentation, flotation and the electrolytic extraction process, etc. 1-4. Copper sulphites are of considerable interest in chemistry. Precipitation of mixed valence metal sulphates such as copper ammonium sulphite is important to obtain metals. The mixed valence copper sulphite, Cu2SO3•Cu SO3•2H2O, Cu2SO3•(NH4)2SO3 is a model compound characterizing the sulphite structure. This structure indicated that solid metal sulphites and sulphite complexes in solution may play a role as intermediates in various chemical processes. Thus, metal sulphites have been explained as used model compounds in the reactions. For instance, the structures of sulphite ion coordination have strongly influenced the course of the thermal decomposition stable up to 200 °C. At the same time, recovery of the precipitation of this complex compound has formed a key stage in the hydrometallurgical processes 5,6. Some studies on the performance of copper ammonium sulphite and the factorial design method in this study were found in the literature. Çolak et al. 7 precipitated as sulphites to produce copper powders from its impure solutions. Copper(I) sulphate solutions were prepared by utilizing these sulphites. The copper powders were produced by thermal disproportionation of copper(I) sulphate at 60 °C and 175 mm

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Section: Resultsmentioning

confidence: 99%

Statistical Modelling of Precipitation of Copper Ammonium Sulphite from Synthetic Copper Sulphate Solutions

Demir¹

2014

Asian J. Chem.

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“…They reported that these salt are thermally stable up to 200 °C and isostructural with Cu(II) replaced by Mn(II), Fe(II) and Cd(II) ions in Cu2SO3•MSO3•2H2O. Çolak et al 11 obtained 99.78 % pure copper powder from Erzurum-Narman region oxidized copper containing 4.48 % Cu. They precipitated Chevreul's salt (Cu2SO3.CuSO3.2H2O) by using ammonia and sulphur dioxide.…”

Section: Precipitation Conditions Of Chevreul's Salt Using (Nh 4 ) 2 mentioning

confidence: 99%

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

Çalban¹,

Kaynarca²,

Sevim³

et al. 2014

Asian J. Chem.

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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. 2 n 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 %.

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Synthesis of Commercial Products from Copper Wire-Drawing Waste

Ayala

Fernández

2014

JOM

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Recovery of copper powders from leach solutions containing copper by means of ammonia, sulphur dioxide and acetonitrile

Cited by 11 publications

References 8 publications

Statistical Modelling of Precipitation of Copper Ammonium Sulphite from Synthetic Copper Sulphate Solutions

Statistical Modelling of Precipitation of Copper Ammonium Sulphite from Synthetic Copper Sulphate Solutions

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

Synthesis of Commercial Products from Copper Wire-Drawing Waste

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