PROCESS FOR REGENERATING A CATALYST

摘要

A process for regenerating a Mo.Bi-based multi-oxide catalyst the catalytic performance of which has deteriorated as a result of its use in vapor-phase catalytic oxidation of propylene or isobutene to prepare acrolein or methacrolein, respectively, which process comprises: heating the deteriorated Mo.Bi-based multi-oxide catalyst in an atmosphere consisting essentially of air at a temperature of 380 DEG C. to 540 DEG C., so as to attain at least partial restoration of the catalytic performance thereof.