A process for extracting copper from chalcopyrite. The ore is subject to "activation grinding" and then dissolved in sulfuric acid under oxygen pressure. The copper dissolves as copper sulfate, leaving a residue of elemental sulfur and gangue
Comyns, Alan E. Dictionary, Encyclopedic Dictionary of Named Processes in Chemical Technology (3rd ed.), Alan E. Comyns (Ed.), Boca Raton, FL, CRC Press LLC, USA 2000, http://worldtracker.org/media/library/Science/Chem istry/Synthesis/Encyclopedic%20Dictionary%20of%20N amed%20Processes%20in%20Chemical%20Technology.pdf, (Named Chem Procss - Amer) {35}