Process for making a carrier-supported catalyst

US4719197A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Wilhelm Vogt · Lichtenau, DE
• Hermann Glaser · Lechenich, DE
• Eitel Goedicke · Wipperfürth, DE

Key dates

• Filing date: Oct 22, 1986
• Grant date: Jan 12, 1988
• Expiry date: Oct 22, 2006

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J23/40
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A carrier-supported catalyst is made by impregnating a ceramic honeycomb structure having a layer of a heat resistant metal oxide applied to it with the aqueous solution of at least one metal selected from platinum, rhodium and palladium, drying the impregnated honeycomb structure and annealing it. More particularly a drying gas regularly distributed across the entire cross-sectional area of the impregnated honeycomb structure is passed therethrough at 20.degree. to 400.degree. C. The temperature and quantity of drying gas are selected so that water ceases to be evaporated from the impregnated honeycomb structure after 30 to 300 seconds and the dried impregnated honeycomb structure is heat-treated over a period of 1 to 3 hours at temperatures up to 1000.degree. C.