This work presents the bench scale experimental results for the cyanide regeneration from pure alkaline aqueous solutions of gold, cooper and iron cyanocomplexes using the AVR process associated to the ion exchange polymeric resins Imac HP555s<FONT FACE=Symbol>Ò</FONT> ((Room&Haas-USA) and Amberlite IRA-420<FONT FACE=Symbol>Ò</FONT> (Room&Haas Brasil Ltda.). The resin Imac HP555s<FONT FACE=Symbol>Ò</FONT> adsorved 64.5% CN, 87.4% Au, 64.9% Cu and 60.5% Fe from the alkaline solution containing metal cyanocomplexes. Meanwhile, the elution stage with H2SO4 and thiourea reached 31.2% CN, 86.2% Au, 86.4% Cu e 41.5% Fe. The resin IRA-420<FONT FACE=Symbol>Ò</FONT> adsorbed 53.4% CN, 86.3% Au, 83.8% Cu and 86.0% Fe under the same experimental conditions adopted for the resin Imac HP555s<FONT FACE=Symbol>Ò</FONT>. The resin Amberlite IRA-420<FONT FACE=Symbol>Ò</FONT> eluted 48% CN, 96.8% Au, 9.1% Cu and 76% Fe.
cyanide; regeneration; hydrometallurgy
