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7857144 
Journal Article 
Solvent Extraction of Gold(III) with Diethyl Carbonate 
Raiguel, S; Gijsemans, L; Van Den Bossche, A; Onghena, B; Binnemans, K 
2020 
ACS Sustainable Chemistry & Engineering
ISSN: 2168-0485 
AMER CHEMICAL SOC 
WASHINGTON 
8 
36 
13713-13723 
English 
WOS:000572823400016 
Diethyl carbonate (DEC) was evaluated as a green, renewable alternative to methyl isobutyl ketone and dibutyl carbitol for the recovery of gold from copper-rich sources, such as anode slimes, by solvent extraction from chloride solutions. DEC is a powerful extractant at high chloride concentrations and can be used to sequester and concentrate gold from large volumes of dilute aqueous solutions containing high concentrations of copper. Stripping can be performed using pure water. Different variables were investigated: DEC concentration, chloride concentration, chloride source, phase volume ratio, and equilibration time. The selectivity and phase disengagement times were studied, and possible mechanisms of extraction are discussed and evaluated. In addition, the stability of DEC against hydrolysis was measured. Copyright © 2020 American Chemical Society. 
anode slime; chloride hydrometallurgy; copper; precious metal refining; solvent extraction