Carrier-supported catalyst and process for making it

US4260520A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Heinz Erpenbach · Cologne, DE
• Klaus Gehrmann · Lechenich, DE
• Herbert Joest · Hürth, DE

Key dates

• Filing date: Nov 13, 1979
• Grant date: Apr 7, 1981
• Expiry date: Nov 13, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C5/48
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a carrier-supported catalyst comprising oxides of cobalt and phosphorus and at least one of the oxides of molybdenum and potassium in the atomic ratio of Co.sub.1 P.sub.1-2 Mo.sub.0-0.05 K.sub.0-0.5 on a porous carrier material, and to a process for making it. To this end, the process provides PA0 (a) for a dry porous carrier material to be saturated with water up to 40 to 80% of its predetermined saturation value; PA0 (b) for the carrier material treated as under (a) to be impregnated either at least once with an aqueous solution of water-soluble compounds of cobalt and phosphorus, molybdenum and/or potassium, or repeatedly and successively, each impregnation being interrupted by an intermediary drying period as specified under (c), with an aqueous solution of a water-soluble compound of merely one of the elements aforesaid, the aqueous solution being used in either case in a quantity which is at most necessary for complete saturation; PA0 (c) for the carrier material to be dried after each impregnation over a period of 2 to 20 hours at 350 to 500 K; and PA0 (d) for the carrier material treated as described under (a) through (c) to be sintered over a perio…