| abstract |
The present invention relates to a fluidized-bed catalyst for propylene ammoxidation to produce acrylonitrile, which consists of silica support and a composite of the formula n n n n A a B b C c Ni d Co e Na f Fe g Bi h M i Mo j O x n n n n wherein A is potassium, rubidium, cesium samarium, thallium, or mixture thereof; B is manganese, magnesium, strontium, calcium, barium, lanthanum, rare earth, or mixture thereof; C is phosphorus, arsenic, boron, antimony, chromium, or mixture thereof; M is tungsten, vanadium, or mixture thereof. The catalyst of the present invention is highly active and selective for preparing acrylonitrile, more specifically, is suitable for catalyzing the reaction between air and propylene at a rather low ratio hence to greatly enlarge the processing capacity of the reactor. By using the catalyst of the present invention, the processing capacity of the reactor increases by 10-15 percent compared with that using conventional catalysts. |