Abstract
Recovery of valuable metals such as copper, nickel and zinc from synthetic sulfate solutions using LIX 984N as the extractant dissolved in kerosene was investigated. The metals get extracted at different equilibrium pH of the aqueous phase and thus the pH of the aqueous solutions forms the basis of their separation. Copper was extracted at an equilibrium pH of 3.5, while nickel and zinc get extracted at an equilibrium pH of 7.3 and 8.8 respectively. The extraction isotherms of copper, nickel and zinc were obtained by contacting the respective metal solutions and 0.05 M LIX 984N at different A:O phase ratio at their respective equilibrium pH of maximum extraction. A two‐stage counter‐ current extraction simulation was done to achieve quantitative extraction of the metals. Furthermore, a two‐stage counter‐ current stripping simulation yielded quantitative recovery of the individual metals, from their loaded organic phases. On the basis of the results, a flow sheet of the process has been developed.
Highlights
Chalcopyrites, pentaldite, spent catalyst, batteries, brass ash, zinc ash are some of the major sources for the production of copper, nickel and zinc1
We report the solvent extraction separation of copper, nickel and zinc from synthetic solution using LIX 984 N as the extractant dissolved in kerosene, with an aim to separate these metals efficiently by single stage extraction
Based on the data pertaining to the extraction behaviour of these metals, a synthetic solution containing 0.150 g/L copper, 0.140 g/L nickel and 0.163 g/L zinc was prepared and used
Summary
Chalcopyrites, pentaldite, spent catalyst, batteries, brass ash, zinc ash are some of the major sources for the production of copper, nickel and zinc1. Recovery of Copper, Nickel and Zinc from Sulfate Solutions Chelating reagents like LIX 87QN, LIX 54, LIX 973, LIX 34, LIX 984, LIX 984N and LIX 84I have been used for the extraction, separation and recovery of copper, nickel and zinc from ammonium carbonate / ammonium sulfate solutions4-10.
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