A PROCESS FOR THE SEPARATION OF IRON COBALT AND NICKEL FROM SOLUTIONS BY SOLVENT EXTRACTION

摘要

1. A process for the separation of iron, cobalt and nickel from solutions by solvent extraction technique to get pure solution of iron, cobalt and nickel which are amenable for the production of pure salts of iron, cobalt and nickel as well as iron, cobalt and nickel metals, which hydrochloric acid is added to a solution containing iron, cobalt, and nickel to give a concentration of 40-400 grains per litre and then contacted with 2-50 volume percent tributyl phosphate in kerosine or carbon tetrachloride or other suitable diluent to extract selectively iron (III) in 1-3 stages and then hydrochloric acid is further added to the raffinate to give a concentration of 200-400 grams per litre and then again contacted with 30-90 volume percent tributylphosphate in kerosine or carbon tetrachloride or other suitable diluent to extract cobalt selectively in 4-10 stages, the iron (III) and cobalt (II) extracted into the organic solvents are stripped, with water in  1-3 stages separately to get pure iron (III) chloride and cobalt (II) chloride solutions respectively, the pure nickel chloride is left in the raffinate unextracted by the  organic solvent.