Large scale synthesis of oxidative dehydrogenation catalysts

Catalysts and methods for large scale production of the catalysts are provided. Exemplary catalyst compositions include molybdenum, vanadium, tellurium, niobium, and oxygen. In the catalyst composition, the molar ratio of molybdenum to vanadium is from 1: 0.05 to 1: 0.60, the molar ratio of molybdenum to tellurium is from 1: 0.01 to 1: 0.30, and the molar ratio of molybdenum to niobium is from 1: 0.01 to 1: 0.40. The oxygen is present in an amount at least satisfying the valence of any present metal oxide, and the composition comprises less than 1.0 wt% sulfur. 提供了催化剂和用于大规模生产所述催化剂的方法。示例性催化剂组合物包括钼、钒、碲、铌、氧。在所述催化剂组合物中，钼与钒的摩尔比为1∶0.05至1∶0.60，钼与碲的摩尔比为1∶0.01至1∶0.30，并且钼与铌的摩尔比为1∶0.01至1∶0.40。氧至少以满足任何存在的金属氧化物的化合价的量存在，并且组合物包括小于1.0重量％的硫。