학술논문
Stability constants of Sb5+with Cl−and thermodynamics of Sb−S−Cl−H2O system involving complex behavior of Sb with Cl
Document Type
Article
Source
Transactions of Nonferrous Metals Society of China; December 2020, Vol. 30 Issue: 12 p3379-3389, 11p
Subject
Language
ISSN
10036326
Abstract
The stability constants of Sb5+with Cl−as well as thermodynamics of the Sb–S–Cl–H2O system were calculated. The stability constants of Sb5+with Cl−were obtained by theoretical calculations of the absorbance of a Sb5+-containing solution at different Cl−concentrations, which was detected by spectrophotometric analysis at certain wavelengths of light (380 nm). The logarithmic values versus 10 of stability constants of Sb5+with Cl−were 1.795, 3.150, 4.191, 4.955, 5.427 and 5.511, respectively, and partly filled the data gaps in the hydrometallurgy of antimony. The presence and distribution of pentavalent antimony compounds under different conditions were analyzed based on equilibrium calculations. Thermodynamic equilibrium calculations were performed for Sb–S–Cl–H2O system, which included the complex behavior of Sb with Cl, and the equilibrium equations of related reactions in this system were integrated into the potential–pH diagram.