THE PHOSPHINE OXIDES CYANEX-923 AND CYANEX-925 AS EXTRACTANTS FOR GOLD(I) CYANIDE AQUEOUS-SOLUTIONS

Authors
ALGUACIL FJ CARAVACA C MARTINEZ S COBO A
Citation
Fj. Alguacil et al., THE PHOSPHINE OXIDES CYANEX-923 AND CYANEX-925 AS EXTRACTANTS FOR GOLD(I) CYANIDE AQUEOUS-SOLUTIONS, Hydrometallurgy, 36(3), 1994, pp. 369-383
Citations number
3
Categorie Soggetti
Metallurgy & Mining
Journal title
Hydrometallurgy → ACNP
ISSN journal
0304386X
Volume
36
Issue
3
Year of publication
1994
Pages
369 - 383
Database
ISI
SICI code
0304-386X(1994)36:3<369:TPOCAC>2.0.ZU;2-2
Abstract
The behaviour of the phosphine oxides Cyanex 923 and Cyanex 925 in the recovery of gold(I) from cyanide solutions is described. Extractions are studied as a function of several variables such as temperature, di luent aromaticity, ionic strength and extractant concentration. Gold(I ) stripping can be accomplished effectively with low aqueous ionic str ength solutions and at high temperatures. From the experimental result s it is seen that Me+... Au(CN)2-.3R3PO, where Me+ = Li+ and R3PO = th e phosphine oxide, is extracted into the organic phase. The extracted species is probably solvated by water.