G. Argiropoulos et al., THE STUDY OF A MEMBRANE FOR EXTRACTING GOLD(III) FROM HYDROCHLORIC-ACID SOLUTIONS, Journal of membrane science, 138(2), 1998, pp. 279-285
A membrane is described consisting of Aliquat 336 chloride immobilized
in poly(vinyl chloride) (PVC) which extracts gold(III) selectively fr
om hydrochloric acid solutions in the presence of a 500-fold higher co
ncentration of copper(II). Gold is recovered from the membrane by stri
pping with a thiourea solution. The stability of the membrane is repor
ted in terms of the extent of leaching of the reagent from the membran
e in aqueous solutions. (C) 1998 Elsevier Science B.V.