反应详情

The catalyst of this Example was prepared in a similar manner as described in Example 6. An ammoniumheptamolybdate solution was prepared by dissolving 4.63 g of ammoniumheptamolybdate in 20 mL of deionized water and adjusting the volume to 25 mL to provide a solution with a molybdenum concentration of 0.15 mol/L. The zeolite was subjected to impregnation as a powder without shaping. The zeolite, 10 g, was impregnated with a solution comprising 6.4 mL of the ammoniumheptamolybdate solution and 2.7 mL of deionized water. The zeolite powder and the solution were manually mixed with a spatula. The impregnated support was dried and calcined by placing it in an oven and heating it with dry air (1 L/min) at a rate of 1° C./min to 70° C. and holding for 10 hours. Then the temperature was increased to 120° C. at a rate of 1° C. per minute and held for 10 hours. Finally, the temperature was increased to 500° C. at a rate of 1° C. per minute and held for 5 hours. The finished catalyst was sieved to remove fines and to obtain the desired 315-500 microns fraction. The catalyst had a molybdenum content of 6.0% wt.