Liquid-liquid extraction of palladium and gold by the sulphide podand 1,12-di-2-thienyl-2,5,8,11-tetrathiadodecane.
The extraction properties of the sulphide podand 1,12-di-2-thienyl-2,5,8,11-tetrathiadodecane (TTD), an open-chain neutral polythioether with six sulphur donor atoms in 1,2-dichloroethane, chloroform and MIBK for Pd and Au in hydrochloric, nitric and perchloric acid media have been examined. The kinetic aspects of the extraction of palladium(II) from hydrochloric acid by TTD and dioctyl sulphide (DOS) were compared. The rate of Pd extraction with TTD is considerably higher than that with DOS, especially with chloroform. Combined use of a reducing agent and TTD enhances the extraction of gold(III) into 1,2-dichloroethane.
Lachowicz
E
E
Department of Analytical Chemistry, Warsaw University of Technology, PL-00-664 Warsaw, Poland.
Czapiuk
M
M