RECOVERING METHOD OF FLUIDIZING PERFORMANCE OF FLUIDIZED BED CATALYST

摘要

PROBLEM TO BE SOLVED: To provide an industrially advantageous method for recovering fluidizing performance important to a fluidized bed catalyst, particularly to a fluidized bed catalyst for phthalic anhydride production. SOLUTION: In the recovering method of the fluidizing performance of the fluidized bed catalyst by crushing disassembling a catalyst deteriorated in the fluidizing performance of the fluidized bed catalyst, in which catalytically active components acts in fused state, the aggregation degree of the fluidized bed catalyst particles after crushing disassembling is preferably <2.0.