Chlorination Process for Gold This process was based on the fact that chlorine, in the presence of moisture, converts gold into the trichloride AuCl3 , which is soluble in water and removed by washing, the gold being then precipitated by ferrous sulphate, sulphur dioxide, hydrogen sulphide, or charcoal.
Ojeda et al. reported that 98.23% and 98.73% of gold was obtained from alluvial component through the chlorination process at following conditions as 873 K and 3600 s, 873 K and 5400 s ...
The Chlorination of Gold Ores. By Mr. Donald Clark, M.M.E., B.C.E. The ideal method for extracting fine gold would be to dis solve out the gold with some solvent which would not attack other minerals present. The solvents known 6o years ago were chlorine, bromine, and cyanide of potassium. Yet in
recover gold from alluvial materials by an alternative process such as chlorination, preventing environmental pollution problems gen erated by gold extraction and concentration by other conventional methods. Extractions of gold close to 99% were achieved, at a temperature of 873 K and at a reaction time of 5400 s, with no signiﬁcant attack
The feasibility to recover the gold present in alluvial material, by means of a chlorination process, using chlorine as a reactive agent, has been studied. The influence of temperature and reaction time was studied through changes in the reactant solid. The techniques used to characterize the mineral samples and the reaction residues were stereomicroscopy, X ray diffraction, X ray fluorescence and scanning electronic microscopy.