Separation of molybdenum and vanadium from oxalate leached solution of spent residue hydrodesulfurization (RHDS) catalyst by liquid–liquid extraction using amine extractant

Separation of molybdenum and vanadium from oxalate leached solution of spent residue hydrodesulfurization (RHDS) catalyst by liquid–liquid extraction using amine extractant

Alamine-336, diluted with kerosene and iso-decanol, was used for separation of vanadium (IV) andmolybdenum (VI) from leached solution generated by oxalic acid washing of spent residuehydrodesulfurization (RHDS) catalyst. The variation of aqueous pH represented that there was completeextraction of both vanadium (IV) and molybdenum (VI) at equilibrium pH 3.8. Both metals wereextracted by two stages counter current process using 10% Alamine-336 along with 5% iso-decanol atorganic to aqueous phase ratio 1:2. The metal loaded organic was then used for selective stripping ofeach metal. About 99% of vanadium (IV) and molybdenum (VI) was selectively stripped with 1.5 Msulfuric acid and 2 M ammonia solution, respectively. Both stripped solutions can be further processedfor the preparation of respective oxide components of vanadium and molybdenum.

Alamine-336, diluted with kerosene and iso-decanol, was used for separation of vanadium (IV) andmolybdenum (VI) from leached solution generated by oxalic acid washing of spent residuehydrodesulfurization (RHDS) catalyst. The variation of aqueous pH represented that there was completeextraction of both vanadium (IV) and molybdenum (VI) at equilibrium pH 3.8. Both metals wereextracted by two stages counter current process using 10% Alamine-336 along with 5% iso-decanol atorganic to aqueous phase ratio 1:2. The metal loaded organic was then used for selective stripping ofeach metal. About 99% of vanadium (IV) and molybdenum (VI) was selectively stripped with 1.5 Msulfuric acid and 2 M ammonia solution, respectively. Both stripped solutions can be further processedfor the preparation of respective oxide components of vanadium and molybdenum.