Patent WO1991013177A1 Extraction and recovery of gold Google .
Sep 5, 1991 . A process for the hydrometallurgical recovery of gold from . 3+ 0.4M thiourea, and 0.01 to 1.0M Fe complexant, and has a leach potential in the range 350 to 700 V vs Normal . concentrates, anodic slimes and residues, as well as gold bearing .. Relates to the use of thiourea in conjunction with urea and.Live Chat