University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Email: schalk@unf.edu
Website: @unf

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Process liquor Gold

Classification: Industrial -> metallurgical -> process liquor -> gold

Citations 1

"Extraction Of Dicyanoaurate(I) Using Supported Liquid Membranes In A Flow Injection Manifold: Evaluation Of Extractants"
Anal. Chim. Acta 1993 Volume 274, Issue 2 Pages 283-292
D. E. Barnes, M. J. C. Taylor and G. D. Marshall, J. F. Van Staden

Abstract: Several primary, secondary, tertiary and quaternary alkyl amines incorporated into supported liquid membranes (SLM) were investigated as extractants for the selective extraction of dicyanoaurate(I) from alkaline leaching solution used in gold processing. Phosphate (pH 7)- or carbonate (pH 10)-buffered feed solution (250 ml) containing ~100 mg L-1 of Au were passed over the SLM and the amount of Au permeating through the membrane was determined by automatic UV-spectrophotometric analysis (240 nm), at 2-min intervals, of the stripping solution (0.1 M NaOH for the primary, secondary and tertiary amines, 1 M thiourea in 0.25 M H2SO4 for the quaternary amines) which circulated on the other side of the SLM. The feed, stripping and carrier solution flow rates were all 1.5 mL min-1. The SLM were evaluated with respect to their stability, selectivity and respective permeability for Au. Based on the max. permeation of Au, two weak base SLM and a strong base SLM were selected; all showed similar stabilities.
Dicyanoaurate Spectrophotometry Sample preparation Supported liquid membrane Extraction