Solvent Extraction of Zinc From Chloride Solutions

A review on methods of regeneration of spent pickling solutions from steel processing

“…authors studying TBP for zinc separation from iron(II) propose further treatment of stripping solution by evaporation of HCl after addition of excess sulfuric acid [72]. Extraction has been proposed for H 2 SO 4 regeneration only by Agrawal et al [73].…”

“…Ninety percent of zinc is extracted in three stages while iron is left in the raffinate. The loaded zinc can be stripped with spent electrolyte or water in the close loop of solvent extraction and electrowinning circuit [72]. However, this extraction with ACORGA ZNX 50 is strongly dependent on water activity and concentration of species in the feed.…”

Adsorption of copper from the sulphate solution of low copper contents using the cationic resin Amberlite IR 120

“…It consumes large quantity of chemicals to effectively decrease the metal contents to acceptable pollution norms and generates sludge, which needs costly disposal procedure as landfill [5,6]. Other treatment procedures for the removal and recovery of metals from solutions are evaporation, solvent extraction, ion exchange, reverse osmosis, membrane separation [7,8]. The recycling of metallic value by evaporation of rinse water is highly energy intensive.…”

Highly Selective Solvent Extraction of Zn(II) and Cu(II) from Acidic Aqueous Chloride Solutions with Mixture of Cyanex 272 and Aliquat 336

“…Hydrochloric acid is widely used in hydrometallurgy to leach various ores such as zinc oxide or zinc ferrite ores, and especially iron-rich ores [1]. Likewise, several processes using acidic chloride media have been developed to leach wastes containing zinc or alloys of zinc and copper [2][3][4][5][6][7][8].…”