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Closed Access item Phosphine oxide mediate transport: modelling of mass transfer in supported liquid membrane transport of gold (III) using Cyanex 923

Authors:Alguacil, Francisco José
Gómez Coedo, Aurora
Dorado López, María Teresa
Padilla, Isabel
Keywords:Extraction, Gold, Kinetics, Membranes, Phosphine oxide, Separation
Issue Date:May-2001
Citation:Chemical Engineering Science 56 (10) : 3115-3122 (2001)
Abstract:The permeation of gold (III) through a supported liquid membrane impregnated with the phosphine oxide Cyanex 923 in n-decane has been investigated. A model is reported describing the transport mechanism which consists of: diffusion process through the feed aqueous diffusion layer, fast interfacial chemical reaction and diffusion through the membrane. The experimental data are quantitatively explained by mathematical equations describing the rate of transport. Different rate-controlling processes take place as long as the metal transport occurs. High selectivity in the separation of gold (III) with respect to the platinum group metals is achieved.
Publisher version (URL):http://dx.doi.org/10.1016/S0009-2509(01)00014-8
Appears in Collections:(CENIM) Artículos

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