Method of producing selective-dehydrogenation catalysts, and catalysts produced in this way

US6028027A · kind A · utility

Assignee

• BASF SE

Inventors

• Michael Baier · Frankfurt, DE
• Christopher William Rieker · Ludwigshafen, DE
• Otto Hofstadt · Altrip, DE
• Wolfgang Buchele · Ludwigshafen, DE
• Wolfgang Jürgen Pöpel · Darmstadt, DE
• Hermann Petersen · Burghausen, DE
• Norbert Neth · Frankenthal (Pfalz), DE

Key dates

• Filing date: Mar 17, 1998
• Grant date: Feb 22, 2000
• Expiry date: Mar 17, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C5/3332
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Catalysts comprising iron and potassium and, if desired, further elements, which catalysts are suitable for dehydrogenating hydrocarbons to give the corresponding olefinically unsaturated hydrocarbons, are prepared by calcining a finely divided dry or aqueous mixture of an iron compound with a potassium compound and, if desired, compounds of further elements in a first step that agglomerates having a diameter of from 5 to 50 .mu.m and formed from smaller individual particles are obtained and, in a second step, preferably after shaping, calcining it at from 300 to 1000.degree. C., with the maximum calcination temperature in the second step preferably being at least 30.degree. below the calcination temperature in the first step. The catalysts thus prepared are useful, in particular, for dehydrogenating ethylbenzene to give styrene.