Lead chloride solubility and density data in binary aqueous solutions

Tan, K; Bartels, K.; Bédard, Pierre

doi:10.1016/0304-386x(87)90063-6

Cited by 25 publications

(12 citation statements)

References 11 publications

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“…Calculated and experimental solubilities in the PbCl 2 + NaCl + H 2 O system at various temperatures. Experimental data were taken from Linke and Seidell (1965), Tan et al (1987), and Mgaidi et al (1991). on P CO 2 may also depend on other system variables such as pH, temperature, and the salt concentration.…”

Section: Resultsmentioning

confidence: 99%

Modeling chemical and phase equilibria in geochemical systems using a speciation-based model

Wang

Anderko

Springer

et al. 2010

Journal of Geochemical Exploration

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Section: Resultsmentioning

confidence: 99%

Modeling chemical and phase equilibria in geochemical systems using a speciation-based model

Wang

Anderko

Springer

et al. 2010

Journal of Geochemical Exploration

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“…The saturated solubility of PbC1 2 in water is 9.9 g/L at 293 K (20°C) and 33.4 g/L at 373 K (100°C). [28][29][30][31][32] Because of the limited solubility of PbCl 2 , the increase in solid-to-liquid ratio (S/L) resulted in a decrease in lead extraction. In fact, lead chloride solubility even at elevated temperatures is not sufficiently high and lead solubility constraints limit the extraction of lead in most commercial chloride leaching processes; hence, chloride leaching of ZPR is better carried out at low pulp density.…”

Section: Parameters Andmentioning

confidence: 99%

Optimization of Lead and Silver Extraction from Zinc Plant Residues in the Presence of Calcium Hypochlorite Using Statistical Design of Experiments

Behnajady

Moghaddam

2014

Metall Mater Trans B

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In this work, a chloride/hypochlorite leaching process was performed for zinc plant residues. Sodium chloride and calcium hypochlorite were used as leaching and oxidizing agents, respectively. Fractional factorial method has been used to test main effects, and interactions among factors were investigated. The statistical software named Design-Expert 7 has been utilized to design experiments and subsequent analysis. Parameters and their levels were reaction time (t = 16 and 120 minutes), reaction temperature [T = 303 K and 343 K (30°C and 70°C)], solid-to-liquid ratio (S/L = 1/6 and 1/38), pH (pH = 0.5 and 2), and Ca(OCl) 2 concentration (C = 0.6 and 3 g/L). Analysis of variance was also employed to determine the relationship between experimental conditions and yield levels. Results showed that reaction temperature and pH were significant parameters for both lead and silver extractions but solidto-liquid ratio had significant effect only on lead extraction. Increasing pH reduced leaching efficiency of lead and silver. However, increasing reaction temperature promoted the extraction of lead and silver. Ultimate optimum conditions from this study were t 1 : 16 min, T 2 : 343 K (70°C), (S/L) 2 : 1/38, pH 1 : 0.5, and C 1 : 0.6 g/L. Under these conditions, extractions of lead and silver were 93.60 and 49.21 pct, respectively.

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“…A partir de los valores obtenidos para B, y teniendo en cuenta, de acuerdo con la ec. [10], su proporcionalidad con el cociente k x ID t , se obtiene para la energía de activación del coeficiente de difusión D e un valor de 17,6 kJ/mol, que es un valor normal y análogo al que figura en la bibliografía para la energía de activación de los coeficientes difusionales. En el caso del concentrado diferencial de cinc, por el contrario, el valor del parámetro B disminuye al aumentar la temperatura.…”

Section: Influencia De La Temperaturaunclassified

Lixiviación oxidante de sulfuros complejos en soluciones de cloruro amónico: cinética de la lixiviación de la esfalerita

Limpo¹

1997

REVMETAL

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Lixiviación oxidante de sulfuros complejos en soluciones de cloruro amónico: cinética de la lixiviación de la esfalerita (#) J.L. Limpcr y Resumen Tras la revisión de las publicaciones recientes sobre la lixiviación de esfalerita en medio cloruro, se presentan los resultados obtenidos en el estudio de la cinética de la lixiviación oxidante con oxígeno de esfalerita en soluciones concentradas de cloruro amónico en presencia de ion cúprico. Este estudio se ha realizado sobre una esfalerita de gran pureza y un concentrado diferencial de cinc. En el intervalo de temperatura estudiado (80 a 130 °C) la disolución se produce de acuerdo con una cinética de control mixto según el modelo de "núcleo sin reaccionar", en el que tanto la difusión en la capa de azufre como la reacción química en el núcleo son etapas controlantes. La expresión matemática de este modelo es: [1-(1-X)Se ha estudiado la influencia que sobre la velocidad de reacción tiene la temperatura, tamaño de partícula y concentración de cúprico. Los valores de la energía de activación de da constante k r que se han obtenido para la esfalerita pura y el concentrado de cinc son, respectivamente, 66,4 y 67,6 kJ/mol. La velocidad de la disolución del cinc aumenta con la potencia 0,43 de la concentración de cúprico. Los resultados obtenidos de la influencia del tamaño de partícula (k T°c \/r 0 y Bocr 0 ), son los que teóricamente predice el modelo de control mixto, hecho que corrobora la validez de este modelo cinético.Palabras clave: Lixiviación. Esfalerita. Cinética. Medio cloruro amónico. Oxidizing leaching of complex sulphides in ammonium chloride: sphalerite leaching kinetics AbstractRecent studies on chloride leaching of sphalerite are rewieved. The kinetics of oxygen leaching of sphalerite in concentrated ammonium chloride solutions in the presence of cupric ion has been studied. A puré sphalerite and a zinc concéntrate have been tested. 80-130 °C temperature range, the dissolution occurred according to a mixed model which assumed both diffusion through sulfur layer and a surface reaction in the shrinking core model. This is described mathematically as: [1-(1-X)The effect of temperature, cupric concentration and particle size on the dissolution rate were determinated. The activation energy of the rate constant k r for the puré sphalerite and zinc concéntrate was found to be 66.4 and 67.6 kJ/mol respectively. The dissolution rate increased as the 0.43 power of the cupric cloride concentration. The results obtained for the effect of particle size show, such as it is predicted by the kinetic mixed model, that the rate constant k r is inversely related, and the parameter B is directly related, to particle radius.

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Lead chloride solubility and density data in binary aqueous solutions

Cited by 25 publications

References 11 publications

Modeling chemical and phase equilibria in geochemical systems using a speciation-based model

Modeling chemical and phase equilibria in geochemical systems using a speciation-based model

Optimization of Lead and Silver Extraction from Zinc Plant Residues in the Presence of Calcium Hypochlorite Using Statistical Design of Experiments

Lixiviación oxidante de sulfuros complejos en soluciones de cloruro amónico: cinética de la lixiviación de la esfalerita

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