High-efficiency recycling method for Mo and Ni from spent catalyst via soda roasting and solvent extraction

Hydrometallurgical Molybdenum Recovery from Spent Catalyst Using Tartaric Acid Derived from Agrifood Waste

“…10 Conversely, hydrometallurgical process approaches are favored for their notable benefits such as reduced energy consumption and lower treatment costs compared to pyrometallurgy. 10,11 This article is licensed under CC-BY 4. Hydrometallurgical processes facilitate the transformation, migration, and enrichment of valuable metals through techniques like low-temperature roasting, strong inorganic or alkali leaching, chemical precipitation, solvent extraction, and ion exchange.…”

“…Hydrometallurgical processes facilitate the transformation, migration, and enrichment of valuable metals through techniques like low-temperature roasting, strong inorganic or alkali leaching, chemical precipitation, solvent extraction, and ion exchange. 10 However, the main processes use high temperature and strong acids (e.g., H 2 SO 4 , HNO 3 ) and bases (e.g., NaOH). 12 To the best of our knowledge, no literature is available regarding the recovery of molybdenum from this type of catalyst, which is extensively utilized in the industry.…”

“…9 However, the use of pyrometallurgy processes is somehow restricted to higher energy expenses, secondary environmental impacts like waste gas emissions, and the production of less valuable products like polymetallic alloy. 10 Conversely, hydrometallurgical process approaches are favored for their notable benefits such as reduced energy consumption and lower treatment costs compared to pyrometallurgy. 10,11 This article is licensed under CC-BY 4.…”

“…However, the use of pyrometallurgy processes is somehow restricted to higher energy expenses, secondary environmental impacts like waste gas emissions, and the production of less valuable products like polymetallic alloy . Conversely, hydrometallurgical process approaches are favored for their notable benefits such as reduced energy consumption and lower treatment costs compared to pyrometallurgy. , Hydrometallurgical processes facilitate the transformation, migration, and enrichment of valuable metals through techniques like low-temperature roasting, strong inorganic or alkali leaching, chemical precipitation, solvent extraction, and ion exchange . However, the main processes use high temperature and strong acids (e.g., H 2 SO 4 , HNO 3 ) and bases (e.g., NaOH) .…”