Abstract
Simultaneous equilibrium was applied to the thermodynamic analysis and calculation of Bi(III)-X(Cl−, NO −3 )-H2O systems, based on which the diagrams of the logarithm of equilibrium concentration of Bi(III) of series precipitation vs pH value of these two systems at 25 °C were obtained, and the pH ranges of the stable zones of various precipitations were analyzed and determined. In Bi (III)-Cl−-H2O system, the variations of c 0 (Bi3+) and c 0(Cl−) have little effect on the equilibria of Bi(OH)3-solution and BiOOH-solution, but has great influence on the equilibrium of BiOCl-solution. However, in Bi(III)-NO −3 -H2O system, the variations of c 0 (Bi3+) and c 0 (NO −3 ) have little effect on equilibria of Bi(OH)3-solution, BiOOH-solution and Bi2O3-solution. When pH value is high, Bi2O3 is the thermodynamic stable phase, its stable zone is the widest, almost including the stable zones of BiOCl or BiONO3, Bi(OH)3 and BiOOH. Bi(OH)3 cannot be obtained from Bi(III)-Cl−-H2O system, even strong alkaline media. Bi2O3 can be obtained from the solution directly, and highly pure BiOCl or BiONO3 can also be obtained through strictly controlling pH value.
Similar content being viewed by others
References
ZHAO Yan-bao, ZHANG Zhi-jun, DANG Hong-xin. A simple way to prepare bismuth nanoparticles [J]. Materials Letters, 2004, 58(5):790–793.
Moiseev G, Vatolin N, Belousova N. Thermodynamic investigations in the Bi-O system[J]. Journal of Thermal Analysis and Calorimetry, 2000, 61(1): 289–303.
Dos S, Luiz C R, Caluete J D Q, et al. Thermochemical properties of complexes of thiourea and tetramethylthiourea with antimony and bismuth tribromides[J]. Thermochimica Acta, 1997, 292(1–2): 71–75.
Malakhov D V. Thermodynamic assessment of the Bi-Zn system[J]. Calphad: Computer Coupling of Phase Diagrams and Thermochemistry, 2000,24(1): 1–14.
Hoch M. Thermodynamic behavior of inorganic and organic systems with eight and more components[J]. Calphad, 2001, 25(2): 253–266.
Parodi N, Borzone G, Balducci G. et al. Thermochemistry of holmium bismuthides[J]. Intermetallics, 2003, 11(11–12): 1175–1181.
Moiseev G, Vatolin N, Belousova N. Thermodynamics and phase diagram of the binary system Bi2O3-B2O3 [J]. Calphad, 1996, 20(4): 511–519.
TANG Mo-tang. Thermodynamic study on bismuth trichloride hydrolysis system[J]. J Central South Inst Min Metall, 1993, 24(1): 45–51. (in Chinese).
ZHENG Guo-qu, TANG Mo-tang, ZHAO Tian-cong. The fundamental theoretical study on bismuth hydrometallurgy in chloride system[J]. J Central South University of Technology, 1997, 28(1): 34–36. (in Chinese).
FU Cong-yue, ZHENG Di-ji. Thermodynamic study on Cu-NH3-H2O system[J]. J Central South Inst Min Metall, 1979, 20(1): 37–42. (in Chinese).
WANG Yun-yan. Study on Preparation of Some Chemical Products of Bismuth and Thermodynamic Equilibrium [D]. Changsha: Central South University of Technology, 1999. (in Chinese).
WANG Yun-Yan, WANG Shao-fen, QIN Yi-hong, et al. Study on the preparation of Bi2O3 powder by the method of precipitation [J]. Painting Industry, 2001, 31(5): 1–5. (in Chinese).
WANG Yun-yan, PENG Wen-jie, WANG Shao-fen, et al. Thermodynamic equilibrium of Bi3+-Cl− -H2O system [A]. The 3rd International and 5th China-Japan Joint Sysposium on Calorimetry and Thermal Analysis (CATS- 2002)[C]. Lanzhou, 2002.
QIN Yi-hong, WANG Yun-yan, Thermodynamic equilibrium of Bi-Cl−-H2O system[J]. The Chinese Journal of Nonferrous Metals, 2000, 10(2): 245–249. (in Chinese).
QIN Yi-hong, WANG Yun-yan. Thermodynamic equilibrium of Bi-NO –3 −-H2O system [J]. Journal of Central South University of Technology, 1999, 30 (5): 497–500. (in Chinese)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Wang, Yy., Peng, Wj. & Chai, Ly. Thermodynamic equilibrium of bismuth hydrometallurgy in chloride and nitrate solutions. J Cent. South Univ. Technol. 11, 410–413 (2004). https://doi.org/10.1007/s11771-004-0085-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11771-004-0085-3