Heterogeneous equilibria in the Au-CN-H2O and Ag-CN-H2O systems

T. Xue; K. Osseo-Asare

doi:10.1007/BF02654844

Heterogeneous equilibria in the Au-CN-H₂O and Ag-CN-H₂O systems

T. Xue, K. Osseo-Asare

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Abstract

The equilibrium relationships in the systems Au-CN-H₂O and Ag-CN-H₂O have been investigated with the aid of the DIAGRAM computer program and thermodynamic data taken from the literature. On the basis of stability diagrams such as Eh-pH, log[Me]-pH, and log[CN]-pH, a discussion is pre-sented of the behavior of gold and silver in cyanide solutions. It is shown that gold and silver have similar behaviors in cyanide media; both metals exhibit wide solubility domains with di-cyanide complexes predominating. Solid AgCN is stable only in solutions of low pH and high silver/cyanide ratio; the species Ag(CN)₃^2- and Ag(CN)₄³ form only in concentrated cyanide solutions.

Original language	English (US)
Pages (from-to)	455-463
Number of pages	9
Journal	Metallurgical Transactions B
Volume	16
Issue number	3
DOIs	https://doi.org/10.1007/BF02654844
State	Published - Sep 1985

All Science Journal Classification (ASJC) codes

Engineering(all)

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title = "Heterogeneous equilibria in the Au-CN-H2O and Ag-CN-H2O systems",

abstract = "The equilibrium relationships in the systems Au-CN-H2O and Ag-CN-H2O have been investigated with the aid of the DIAGRAM computer program and thermodynamic data taken from the literature. On the basis of stability diagrams such as Eh-pH, log[Me]-pH, and log[CN]-pH, a discussion is pre-sented of the behavior of gold and silver in cyanide solutions. It is shown that gold and silver have similar behaviors in cyanide media; both metals exhibit wide solubility domains with di-cyanide complexes predominating. Solid AgCN is stable only in solutions of low pH and high silver/cyanide ratio; the species Ag(CN)3 2- and Ag(CN) 4 3 form only in concentrated cyanide solutions.",

author = "T. Xue and K. Osseo-Asare",

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T1 - Heterogeneous equilibria in the Au-CN-H2O and Ag-CN-H2O systems

AU - Xue, T.

AU - Osseo-Asare, K.

PY - 1985/9

Y1 - 1985/9

N2 - The equilibrium relationships in the systems Au-CN-H2O and Ag-CN-H2O have been investigated with the aid of the DIAGRAM computer program and thermodynamic data taken from the literature. On the basis of stability diagrams such as Eh-pH, log[Me]-pH, and log[CN]-pH, a discussion is pre-sented of the behavior of gold and silver in cyanide solutions. It is shown that gold and silver have similar behaviors in cyanide media; both metals exhibit wide solubility domains with di-cyanide complexes predominating. Solid AgCN is stable only in solutions of low pH and high silver/cyanide ratio; the species Ag(CN)3 2- and Ag(CN) 4 3 form only in concentrated cyanide solutions.

AB - The equilibrium relationships in the systems Au-CN-H2O and Ag-CN-H2O have been investigated with the aid of the DIAGRAM computer program and thermodynamic data taken from the literature. On the basis of stability diagrams such as Eh-pH, log[Me]-pH, and log[CN]-pH, a discussion is pre-sented of the behavior of gold and silver in cyanide solutions. It is shown that gold and silver have similar behaviors in cyanide media; both metals exhibit wide solubility domains with di-cyanide complexes predominating. Solid AgCN is stable only in solutions of low pH and high silver/cyanide ratio; the species Ag(CN)3 2- and Ag(CN) 4 3 form only in concentrated cyanide solutions.

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Heterogeneous equilibria in the Au-CN-H₂O and Ag-CN-H₂O systems

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