Neutralization of sulfuric acid containing iron ions.

摘要

A method for neutralization of sulfuric acid containing Fe ions comprises adding ions selected from the group consisting of Na ions, K ions, Mg ions, Ca ions and NH4 ions in the form of a compound containing chlorine to the sulfuric acid solution to be treated in an amount corresponding at least to the chemical equivalent to SO4<2><->, and bringing the resultant solution into contact with an organic solvent containing oxygen or comprising alkylamine for extracting Fe ions from said aqueous solution into the organic phase as chloride complex. Iron chloride can be recovered from the organic phase by distilling or evaporating the organic solvent or by extraction back into water.