Thermodynamic Study on the Extraction of Silver with Octylamine AITranslate
Abstract AITranslate
The reaction process and thermodynamic properties of silver extraction with sulfonated kerosene as diluent and octylamine as extractant were studied.Silver was extracted in temperature range of 293.15~318.15K and ionic strength of 0.2~2.0mol/kg.The pH value of aqueous phase was determined by pH meter,and the silver content in aqueous phase was determined by atomic absorption spectrophotometry.The extraction rate of the extraction reaction was calculated and the optimum extraction conditions were determined.The standard equilibrium constant K■ at different temperatures wow obtained by polynomial fitting,and the relations between K■,entropy or enthalpy,Gibbs free energy and temperature were stu-died.The experimental results show that low temperature and low ionic strength are more conducive to the extraction of silver by octylamine.Thermodynamic calculation shows that the Gibbs free energy,enthalpy and entropy of extraction reaction increase with the decrease of temperature,which are negatively correlated with temperature.
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DOI：
Chinese Library Classification Number:TF804.2[冶金工程—有色金属冶金]
Citation Information:
The reaction process and thermodynamic properties of silver extraction with sulfonated kerosene as diluent and octylamine as extractant were studied.Silver was extracted in temperature range of 293.15~318.15K and ionic strength of 0.2~2.0mol/kg.The pH value of aqueous phase was determined by pH meter,and the silver content in aqueous phase was determined by atomic absorption spectrophotometry.The extraction rate of the extraction reaction was calculated and the optimum extraction conditions were determined.The standard equilibrium constant K■ at different temperatures wow obtained by polynomial fitting,and the relations between K■,entropy or enthalpy,Gibbs free energy and temperature were stu-died.The experimental results show that low temperature and low ionic strength are more conducive to the extraction of silver by octylamine.Thermodynamic calculation shows that the Gibbs free energy,enthalpy and entropy of extraction reaction increase with the decrease of temperature,which are negatively correlated with temperature.
quote
| GB/T 7714-2015 | [1] JI Hong-xiang, SONG Zong-ren, JIANG Yin, et al. Thermodynamic Study on the Extraction of Silver with Octylamine[J]. Rare Metals and Cemented Carbides, 2021(5): 17-23. |
| MLA | [1] JI Hong-xiang, et al., "Thermodynamic Study on the Extraction of Silver with Octylamine." Rare Metals and Cemented Carbides, no. 5, 2021, pp. 17-23. |
| APA | [1] JI Hong-xiang, SONG Zong-ren, JIANG Yin, MA Xiao-xue, & FANG Da-wei. (2021). Thermodynamic Study on the Extraction of Silver with Octylamine. Rare Metals and Cemented Carbides(5), 17-23. |
| IEEE | [1] JI Hong-xiang, SONG Zong-ren, JIANG Yin, MA Xiao-xue, and FANG Da-wei, "Thermodynamic Study on the Extraction of Silver with Octylamine," Rare Metals and Cemented Carbides, no. 5, pp. 17-23, 2021. keywords: {silver;octylamine;solvent extraction;thermodynamics;standard equilibrium constant} |