Patent ID: 6395062
Filing Date: 2002-05-28
Classification: C21B,C22B,Y02P,Y02W

Abstract:
In a process for the removal of iron values from a water-immiscible organic solvent containing an oxime extractant loaded with at least one other metal value by washing the organic solvent with a dilute aqueous sulfuric acid solution, the improvement wherein the oxime extractant is a C9 alkylsalicylaldoxime or a mixture of a C9 alkylsalicylaldoxime and a ketoxime, the contact time in a mixer between the organic solvent and the dilute aqueous sulfuric acid solution is from about 1 to about 5 minutes, and the dilute aqueous sulfuric acid solution contains from 0 to 99% by weight of a diluted electrolyte-containing aqueous sulfuric acid solution from a tankhouse.