The Fe(III) loaded in the phase needs to be stripped to separate
Fe(III) from sulfuric acid. The ideal stripping agent may be sulfuric
acid which reacts with the complex as follow:
[(R3NH)2Fe (OH)(SO4)2](O)+ 3H+
→ Fe3++ 2[(R3NH)(HSO4)](O)+ H2O (16)
Decomposition of (TOAH)2Fe(OH)(SO4)2 leads to the depletion
of the extractable species Fe(OH)2+, Fe(III) is transferred from
the organic phase into an aqueous solution, and sulfuric acid is
extracted and remains in the organic phase. If the WSA containing