The copper pyrometallurgical industry faces the precipitation of un-soluble slimes containing bismuth, arsenic and antimony that can reduce purity. Ion-exchange resins are used to treat electrolyte avoid their precipitation. After resin saturation, a regeneration stage with 17%(w/w) hydrochloric acid bismuth (e.g. up 10 g/L) is currently limed. In this work, selective process was developed reco...