Abstract
The applications of salting-out method of ammonium meta-vanadate using ammonium chloride and acid precipitation method to recover molybdic acid by using hydrochloric acid were examined. Also, the purification of feed solution containing both Mo (VI) and V (V) utilizing weak basic type ion exchange resin was studied. Both salting out precipitation and acid precipitation methods were found to be efficient to recover Vand Mo products, respectively. The ion exchange method was also useful to remove V (V) from Mo (VI), but the separation of ultrafine solid particle formed by the control of pH of the solution was found to be important. The dilution of feed solution, however, is sometimes required. Based on the results obtained, flowsheet for practical operation was designed. The overall recoveries of Mo and V were found to be around 92%, for both metals, suggesting satisfactory operations.
