Solvent extraction of phosphoric acid from various aqueous solutions has been investigated using tributyl phosphate in kerosene as the extractant. The effect of the nature of the diluent on the extraction of phosphoric acid with TBP has been studied and correlated with the dielectric constant. The extraction equilibrium curve showed that an overall extraction yield of more than 80 % could be reached from aqueous solutions containing 0.8M of sulfuric acid. Pure phosphoric acid was stripped from the loaded organic phase by counter current stripping with distilled water. The produced acid was post treated to eliminate the co-extracted acids and characterized. Keywords phosphoric acid • TBP • extraction Acknowledgement The author would like to express his thanks to General Director of the Syrian Atomic Energy Commission Prof. I. Othman and Prof. G. Zayzafoon Head of the Chemistry Department for their encouragement to carry out this work and to Mr. H. Shlewit for his valuable discussion. The author would like to extend his thanks to Ms. S. Alike and Mr. A. Rezkalah for their valuable help to carry out this work.
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