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The Investigation of Precipitation Conditions of Chevreul’s Salt
Abstract:In this study, the precipitation conditions of Chevreul’s salt were evaluated. The structure of Chevreul’s salt was examined by considering the previous studies. Thermodynamically, the most important precipitation parameters were pH, temperature, and sulphite-copper(II) ratio. The amount of Chevreul’s salt increased with increasing the temperature and sulphite-copper(II) ratio at the certain range, while it increased with decreasing the pH value at the chosen range. The best solution medium for recovery of Chevreul’s salt is sulphur dioxide gas-water system. Moreover, the soluble sulphite salts are used as efficient precipitating reagents. Chevreul’s salt is generally used to produce the highly pure copper powders from synthetic copper sulphate solutions and impure leach solutions. When the pH of the initial ammoniacal solution is greater than 8.5, ammonia in the medium is not free, and Chevreul’s salt from solution does not precipitate. In contrast, copper ammonium sulphide is precipitated. The pH of the initial solution containing ammonia for precipitating of Chevreul’s salt must be less than 8.5.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1125927Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1037
 E. Jackson, Hydrometallurgical Extraction and Reclamation, Wiley, New York, (1986), 204–238.
 F. Habashi, Precipitation in hydrometallurgy, in Proceedings of the XVIII International Mineral Processing Congress, Sydney, (1993), 1323–1328.
 F. Habashi and R. Dugdale, Ammonium sulphite in the hydrometallurgy of copper, Metal, 28 (1974), 129–132.
 E.H.E. Pietsch (Ed.), Gmelin’s Handbook, Aufl. System No. 60, vol. 8, Verlag Chemie, Weinheim: Bergstrasse, (1958), 484.
 P. Kierkegaard, B. Nyberg, Acta Chem. Scand. 19, (1965) 2189.
 M. H. Conklin and M. R. Hoffmann, Metal ion-sulphur (IV) chemistry. 3. Thermodynamics and kinetics of transient iron (III)–sulphur (IV) complexes, Environ. Sci. Technol., 22, (1988), 899–907.
 J. B. de Andrade, L. A. da Silva, Isomorphic series of double sulphites of the Cu2SO3.MSO3.2H2O (M = Cu, Fe, Mn, and Cd) type. J. Braz. Chem. Sci. 15 (2004), 170.
 Cox X. B., Linton, R.W., Antonio H. M., Jailson B. de Andrade, Air oxidation of mixed valence copper sulfite surfaces—an experimental model supporting the stability of sulfite species in airborne particles, Atmospheric Environment, (1986), 2, 1139-1143.
 Da Silva, L. A., Matos, J. R., and De Andrade, J. B. Synthesis, identification and thermal decomposition of double sulphites like Cu2SO3.MSO3.2H2O (M=Cu, Fe, Mn, or Cd), Thermochim. Acta, 360, (2000), 17–27.
 Çolak, S., Çalban, T., Yeşilyurt, M., Sergili, D., Ekinci, Z. Recovery of copper powders from leach solutions containing copper by means of ammonia, sulphur dioxide and acetonitrile. Powder Technology. (2003), 134, 65.
 Innoue, M., Grijalva, H., Inoue, M. B. and Fernando, Q. Spectroscopic and magnetic properties of Chevreul’s salt, a mixed valence copper sulphite Cu3(SO3)2.2H2O. Inorganica Chimica Acta. (1999), 295, 125.
 Parker, A. J., Muir, D. M. Recovery of copper powder from copper concentrates and from solutions of copper(II) sulphates using sulphur dioxide and aqueous acetonitrile. Hydrometallurgy. (1981), 6, 239.
 Çalban, T., Çolak, S., Yeşilyurt, M. Statistical modeling of Chevreul’s salt recovery from leach solutions containing copper. Chemical Engineering and Processing. (2006), 45, 168.
 Yeşilyurt, M. and Çalban, T. Precipitation of Chevreul’s salt from CuSO4 solutions with Na2SO3, Chem. Process Eng., (2007), 28, 85–91.
 Giovannelli, G., Natali, S., Zortea, L., Bozzini, B. An investigation into the surface layers formed on oxidised copper exposed to SO2 in humid air under hypoxic conditions. Corrosion Science. (2012), 57, 104-113.
 Fischmann, A. J., Dixon D. G. Upgrading of a chalcopyrite concentrate by reaction with copper(II) and sulphite–Unexpected formation of Chevreul’s salt, Cu2SO3.CuSO3.2H2O. Minerals Engineering. (2010), 23, 746-751.
 Çalban, T., Kaynarca, B., Sevim, F., Eroğlu, H. Precipitation Conditions of Chevreul's Salt Using (NH4)2SO3 from Synthetic Aqueous CuSO4 Solutions. Asian Journal of Chemistry. (2014), 26/18, 6111-6117.
 Çalban, T., Kaynarca, B., Kuşlu, S., Çolak, S. Leaching kinetics of Chevreul's salt in hydrochloric acid solutions. Journal of Industrial and Engineering Chemistry. (2014), 20/4, 1141-1147.
 Çalban, T., Kuşlu, S. and Çolak, S. Precipitation Conditions of Chevreul’s salt from Synthetic Aqueous CuSO4 Solutions, Chemical Engineering Communications, (2009) 196, 1018-1029.
 Çalban, T., Laçin, O., Kurtbaş, A., Experimental Chevreul’s Salt Production Methods on Copper Recovery. Journal of Industrial and Engineering Chemistry. International Journal of Environmental, Chemical, Ecological, Geological and Geophysical Engineering. (2015), 9/4, 377-380.
 Guan Mingyun*, Jian Yan, Sun Jianhua, Shang Tongming, Liub Qi and Xu Zheng, Facile Preparation of Chevreul’s salt (Cu2SO3·CuSO3·2H2O) mesocrystalline microspeheres and their high photocatalytic activity, CrystEngComm, (2015), 17, 7372.
 Yazıcı, E. Y., Ehsani, A., Deveci, H., Recovery of copper from metal-rich sulfate solutions by precipitation, 23rd International Mining Congress and Exhibition of Turkey, IMCET (2013), 2, 861-869.
 Liancheng, Z., Haowei, W. and Changfa, X., Electrochemical Performance of Cu2SO3•CuSO3•2H2O Synthesized by Hydrothermal Method, Advanced Materials Research, (2012), 538-541, 2405-2408.
 Jun, I., Takeshi, S., Toshiaki, O., Masatoshi, O., Surface layers formed initially on copper in air containing water vapor and SO2 as determined by IR-RAS and 2D-IR, Journal of Electroanalytical Chemistry, (1999) 473, 256–264.
 Youzbashi, A.A., Dixit, S. G., Leaching of Cu20 with Aqueous Solution of Sulfur Dioxide, Metalurgical Transactions B, (1993), 24B, 563.
 Gerhard B. und Johann P., IRS-Untersuchungd er degradierenden Wirkung von Licht und SO2 auf pigmentiertes Papier, Mikrochimica Acta, (1983), I, 87-94.
 Habashi, F., Ammonium Sulfite in the Hydrometallurgy of Copper, Metall, (1974), 28(2), 129-132.
 Brant, P.; Fernando, Q.; J. Inorg. Nucl. Chem. (1978), 40, 235.
 Martins, C. R.; Cabral Neto, C. A.; Alves, J. J. F.; de Andrade, J. B.; J. Braz. Chem. Soc. (1999), 10, 453.
 R. C. Weast, CRC Handbook of Chemistry and Physics 66TH edition, CRC Press, Florida, 1985-1986, p B-94.