Przemysl Chemiczny, Vol.89, No.2, 174-177, 2010
Extraction of vanadium(V) from a mixture after synthesis of potassium metavanadate(V)
Spent V catalyst from H(2)SO(4) prodn. was converted to KVO(3) (yield 95%) by reaction with KCl at 873 K for 4 h. The reaction residues were extd. with aq. solns. of NaOH, KOH, urea, H(2)SO(4) and Na(2)CO(3) as well as with distd. H(2)O to recover V. The highest degree of the V recovery (97.68%) was achieved when NaOH was used as extn. agent.