| 摘要 |
A regeneration process for tellurium-containing metal oxide catalysts used in the process for oxidation, ammoxidation or oxidative dehydrogenation of organic compounds at a temperature of about 300 DEG C. to about 600 DEG C. The process can be effectively applied to such catalysts which have become partially deactivated during the reaction. According to the present process, the deactivated catalyst is regenerated at the reaction temperature under a non-reductive atompshere by contacting the deactivated catalyst with a tellurium-enriched metal oxide catalyst having a tellurium content higher than that of a fresh metal oxide catalyst used in the reaction, or by contacting the deactivated catalyst at the reaction temperature with a tellurium-molybdenum-enriched catalyst system selected from the group consisting of (i) a physical blend of a tellurium-enriched catalyst and a molybdenum-enriched catalyst and (ii) a tellurium-molybdenum-enriched catalyst, the tellurium and molybdenum contents being higher than those of the fresh metal oxide catalyst used in the reaction. In a particularly preferred embodiment, the process is applied to tellurium-containing metal oxide catalysts in a fluidized bed. More preferably, the process is carried out during the oxidation, ammoxidation or oxidative dehydrogenation reaction. |
