| abstract |
The invention relates to a catalyst for preparation of butadiene by oxydehydrogenation of butene in a fluidized bed reactor, a method of preparing the same, and use of the same, wherein the method comprises: reacting a metal precursor with an alkaline substance to obtain a slurry containing insoluble compound, followed by filtering and washing the slurry; adding a binder and deionized water, followed by agitation to regulate the solid content of the slurry to 10-50%; subjecting the slurry to spray drying granulation, wherein the temperature at the feed port is controlled between 200-400°C, and the temperature at the discharge port is controlled between 100-160°C, to obtain catalyst microspheres; and drying the catalyst microspheres at 80-200°C for 1-24h, and then calcining the catalyst microspheres at 500-900°C for 4-24h to obtain a catalyst having a general formula of FeX a Y b Z c O d , comprising Fe, Mg, Zn, Bi, Mo, Mn, Ni, Co, Ba, Ca, and other metals. The catalyst microspheres prepared according to the invention exhibits high mobility, desirable particle size distribution, extremely high mechanical strength and catalytic activity, is applicable to industrial production of butadiene by oxydehydrogenation of butene in a fluidized bed. When this catalyst is used to prepare butadiene by oxydehydrogenation of butene, the yield of butadiene is 76-86%, and the selectivity to butadiene is 94-97%. |