Cyclic solvent extraction with OIDMDPPA and oxalate stripping to recover purified H3PO4, Al(OH)3 and battery grade FeC2O4·2H2O from wet-process phosphoric acid

Key Points

• The method enables recovery of high-purity H3PO4 and Al(OH)3 from wet-process phosphoric acid, improving resource use.
• Utilizing cyclic solvent extraction and oxalate stripping, the process isolates aluminum hydroxide effectively.
• Analysis reveals that iron(II) oxalate can be obtained from the same phosphoric acid source, offering multiple product recovery.
• The findings suggest enhanced sustainability in phosphoric acid processing, optimizing chemical recovery methods.