Cyanide Leaching Chemistry & Gold Cyanidation. The reactions that take place during the dissolution of gold in cyanide solutions under normal conditions have been fairly definitely established. Most agree that the overall cyanide equation for leaching and cyanidation of gold is as follows: 4 Au + 8 NaCN + O2 + 2 H20 = 4 NaAu (CN)2 + 4 …
A simple procedure is described for extraction of free gold from geochemical samples by cyanidation, its concentration by solvent extraction into diisobutyl ketone and final estimation by graphite furnace atomic absorption spectroscopy.
The results obtained in this study demonstrate that reliable results suitable for use in geochemical prospecting of gold can be obtained with a sample weight of 10 g, using aqua regia digestion...
This paper evaluates a rapid procedure for the precise estimation of gold in as large as 30 g samples (to overcome in-homogeneity problems) by F-AAS and GF-AAS after separation and pre-concentration of gold using DIBK solvent extraction step.
This paper investigated the possibility of using distillation to recover gold contained in the waste generated in Ghana as well as the recycling potential of the distillate (regenerated DIBK).
Three approaches have proved to be very efficient in reducing cyanide consumption in gold plants and reducing the cost of effluent treatment for cyanide destruction: the use of an online cyanide analyzer, oxygen enrichment of the pulp and the addition of lead nitrate (or litharge).
This paper evaluates a rapid procedure for the precise estimation of gold in as large as 30 g samples (to overcome in-homo-geneity problems) by F-AAS and GF-AAS after separation and pre-concentration of gold using DIBK solvent extrac-tion step.
Test solutions containing 1, 10, 50, and 100 micro grams of monovalent gold in 40 ml of cyanide solution were oxidized by adding 5 drops of saturated bromine water and 5 ml of 48-percent HBr, heated to expel hydrogen cyanide gas, cooled, and extracted with 10 ml …
A solvent extraction method using diisobutyle ketone (DIBK) is designed for the accurate and precise estimation of very low concentrations of gold in rocks, ores and other geological samples. 30...
Copper, iron and sodium interferences in the determination of gold by atomic absorption spectrometry with particular reference to cyanide solutions. Analytica Chimica Acta 1992, 264 (1), 107-114.
