METHOD OF COATING MONOLITH SUBSTRATE WITH CATALYST COMPONENT

摘要

PROBLEM TO BE SOLVED: To provide a method of coating a honeycomb monolith substrate, which includes a plurality of channels, with a liquid containing a catalyst component.SOLUTION: A coating method comprises the steps of: (i) holding a honeycomb monolith substrate substantially vertically; (ii) introducing a pre-determined volume of the liquid into the substrate via open ends of the channels at a lower end of the substrate; (iii) sealingly retaining the introduced liquid within the substrate; (iv) inverting the substrate containing the retained liquid; and (v) applying a vacuum to open ends of the channels of the substrate at the inverted lower end of the substrate for absorption of the liquid via the channels of the substrate.