Selective separation of vanadium from molybdenum by electrochemical ion exchange

Extraction of metals from spent hydrotreating catalysts: Physico-mechanical pre-treatments and leaching stage

“…Several methods for separation, purification and recovery of molybdenum and vanadium from leach solutions are currently used; main techniques include sulphide precipitation, ammonium salt precipitation, carbon adsorption, ion exchange and solvent extraction [4][5][6][7][8][9][10][11][19][20][21]. Once nickel and cobalt are extracted from the solid residue of the water or alkaline leaching, they can be recovered by precipitation; however, due to their very similar physico-chemical properties, a concentrate is obtained only, otherwise a solvent extraction stage is required [22][23][24][25].…”

Reticulated vitreous carbon as an electrode material

“…Henry and Van Lierde used an electrochemical ion exchange process employing an RVC cathode, having pores filled with an ion exchange resin loaded with V and Mo from a hydrodesulphurisation process. They used a three-compartment electrode cell, in order to elute the co-adsorbed vanadium and molybdenum selectively [56]. This technique was first used for decontamination of nuclear wastes.…”

Membrane reactors for the desulfurization of power plant gas emissions and transportation fuels

“…Henry and Van Lierde developed a three-compartment cell equipped with an reticulated vitreous carbon cathode mixed with ion-exchange resin and two TiePt anodes separated by a Daramic diaphragm to selectively separate the vanadium from molybdenum (Henry & Van Lierde, 1998). In this designed membrane reactor, the pentavalent vanadyl anion was selectively desorbed with respect to molybdenum after its reduction to a tetravalent vanadyl cation.…”