Abstract The effects of orthophosphoric acid concentration in precursor preparation on the catalyst behavior have been studied.For the catalysts prepared at higher concentrations of acid,the quantity of V~(4+) phase (VO)_2P_2O_7 is quite large,and the n-butane conversions are all considerably high.With decreasing the acid concentration in precursor preparation,the relative amount of V~(5+) phase ��-VOPO_4 and the n-butane conversion increase continuously,whereas the selectivity to MA increases at beginning and then decreases after it reaches a maximum value.The catalyst prepared at the acid concentration of 95.0% gave the maximum yield of MA of 45.49% at an inlet n-butane concentration of 4.0% and a space velocity of 500h~(-1).
WEN Yu-long,XU Wen.Catalytic Behavior of Fluidized-Bed Catalystfor Oxidation of n-Butane to Maleic Anhydride[J] Chemcial Industry and Engineering, 2003,V20(6): 425-428
2003, Vol. 20 
