| abstract |
A process for the production of catalyst supports which comprises the aqueous solution preparation step (S1) of preparing an aqueous solution containing lanthanum ions and either manganese ions or iron ions, the solution-filling step (S2) of filling the aqueous solution prepared in the step (S1) into the pores of porous alumina by a pore-filling method involving the utilization of capillary phenomena of the pores, the drying step (S3) of drying the porous alumina prepared in the step (S2) in which the pores are filled with the solution, and the firing step (S5) of firing the porous alumina obtained in the step (S3) to form a magnetoplumbite-type complex oxide in the pores; and catalyst supports. The invention provides a process for the production of catalyst supports which makes it possible to produce more easily an alumina support capable of keeping decontamination performance against HC, CO and NO even after long-time exposure to high-temperature atmosphere of about 1000°C; and such catalyst supports. |