Przemysl Chemiczny, Vol.85, No.8-9, 871-873, 2006
Recovery of vanadium pentoxide from a spent vanadium catalyst with diluted urea solutions
The spent catalyst, 5.0 g, was treated with 50 ml aq. 20% urea at 295-320 K for 5-120 min and filtered. The filtrate was analyzed for V(V) and the max. recovered concn. was 0.0195 mol V/l. Temp. was a minor factor and time was significant for the first 30 min.