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- W2017819621 abstract "Leaching process by ammonium thiosulfate and solvent extraction by trioctylmethylammonium chloride (TOMAC, (C8H17)3CH3NCl) to recover gold from ores and waste was developed in our laboratory. In this report, the effects of gold, pH, ammonia, thiosulfate and cupric (Cu2+) ion concentration of ammonium thiosulfate solution, organic and water phase ratio were investigated to obtain a high recovery of gold with TOMAC. Under the constant condition of TOMAC (0.18mol/l, n-octane diluent + 10vol% 1-hexanol (in organic phase)) as discussed in the 1st report which is related with this work, it was found that extraction efficiency increased with the thiosulfate ion to form a (TOMAC)3-Au(S2O3)23- ion at the condition of 0.01 to 0.03mol/l Cu2+ ion and 1.0 to 3.0mol/l NH3/NH4+. From the experimental results, it is indicated that this process can recover gold effectively and directly from ammonium thiosulfate solution by TOMAC. In addition, the advantage of this process is that the extraction can be conducted without pH and other adjustment." @default.
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- W2017819621 date "2005-01-01" @default.
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- W2017819621 title "Solvent Extraction of Gold from Ammonium Thiosulfate Solution by Trioctylmethylammonium Chloride (2nd report)-Extraction Effects and Conditions of Ammonium Thiosulfate Solution-" @default.
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- W2017819621 doi "https://doi.org/10.2473/shigentosozai.121.65" @default.
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