Vanadium Oxide Recovery from Spent Catalysts by ChemicaL Leaching

O.Abas, Falak

doi:10.30684/etj.26.2.2

	Vanadium Oxide Recovery from Spent Catalysts by ChemicaL Leaching
Engineering and Technology Journal
Article 1, Volume 26, Issue 2, 2008, Pages 124-138 PDF (966.25 K)
DOI: 10.30684/etj.26.2.2
Author
Falak O.Abas
University of Technology-Iraq, Baghdad, Iraq
Abstract
The Vanadium content of the catalyst can be reclaimed for further use. The aim of present work is to recover Vanadium pentoxide (V2O5) from spent catalyst which previously used by a local detergent factory using chemical treatment. This type of treatment consist of chemical solution of sodium hydroxide (NaOH 10–50 %) which is reacted with Vanadium in the spent catalyst to get sodium vanadiate at temperature(80 ± 5Cº) for (2-10) hrs to get pure Vanadium pentoxide . Different extractive conditions were carried out for the same manufacturing system above as chemical alkali solution of NaOH with in the range (10-50 wt.%) ,time of chemical treatment with in the range (2-8 hrs) ,and mixing velocity for reaction solution with in the range (75-200 cycle/min) ,then a prepared products will be optimized by the use of adsorption technique of vanadium on the surface of active carbon particles (2 mm mesh size) ,where 45 gm of active carbon were applied on packing column of 3 cm diameter and 300 cm long , then graph this results in order to optimize the extractive condition above and the optimization results are: Pure vanadium pentoxide (85%,3.60 gm ) from spent catalysts result at optimum conditions of 20 wt.% of NaOH alkali solution ,8 hrs time of mixing reactants ,and 95 cycle/min mixing velocity (medium velocity to give homogeneity of reaction) .

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