Print ISSN: 1681-6900

Online ISSN: 2412-0758

Author : Falak.O.Abas,

Vanadium Oxide Recovery from Spent Catalysts by ChemicaL Leaching


Engineering and Technology Journal, 2008, Volume 26, Issue 2, Pages 124-138

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) .