CopperCopper is one of the latest additions to the list of critical minerals designated by US Department of Energy due to increasing demandDemand for electrificationElectrification and cloud storage. The expected copper demandCopper demand in 2050 will be more than 60 million tons while the currentCurrent mineMine production was only 22 million tons in 2023. Due to the consistent delays in permitting new world class mines and processingProcessing plants, it would be extremely difficult to triple the mineMine production in less than 30 years. Low gradeLow Grade materials for heapHeap or dump leachingLeaching play key roles to meet the metalMetal demandDemand. These primary sulfidesPrimary sulfides can only be processed by the process with low capital and operating costsOperating Cost. New chemical systems or processingProcessing methods have been investigated varying from chemical and biological processes. The authors have studied systems using conventional sulfuric acidsSulfuric acid, methane sulfonic acids, and glycine with various oxidants and additivesAdditives such as activated carbonCarbon. It’s been observed that in a well-controlled temperature regime and solution chemistry, copper extractionCopper extraction was not hindered by the well-known passivationPassivation. It is believed that proper control and maintenance of the solution Eh played a key role in avoiding the surface passivationPassivation. From chalcopyriteChalcopyrite concentrateConcentrate, 99% copper extractionCopper extraction was observed at 65 °C and low gradeLow Grade ore also showed promising results in room temperature leachingLeaching with activated carbonCarbon. Methanesulfonic acid also showed excellent results and the downstream solvent extractionSolvent extraction in methanesulfonic acid was also investigated.