Metals recovering from waste printed circuit boards (WPCBs) using molten salts

► Recovering of valuable metals from WPCBs. ► Low temperature treatment, i.e., 300 °C. ► Copper, and precious metals are recovered, without dissolution or melting. ► Many hazardous gases are dissolved and trapped in the molten salt. ► Under operation without oxygen the flue gas contains large quantities of hydrogen.