Process for the catalytic decomposition of dinitrogen monoxide in a gas stream

US5587135A · kind A · utility

Assignee

• BASF SE

Inventors

• Thomas Fetzer · Speyer, DE
• Wolfgang Buechele · Ludwigshafen, DE
• Hermann Wistuba · Mannheim, DE
• Bernhard Otto · Schifferstadt, DE
• Gert Buerger
• Paul Pijl · Bischofswerda, DE

Key dates

• Filing date: Mar 24, 1995
• Grant date: Dec 24, 1996
• Expiry date: Mar 24, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/50
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for the catalytic decomposition of dinitrogen monoxide in a gas stream by contacting the gas stream at temperatures of 200.degree.-900.degree. C. and pressures of 0.1 to 20 bar with a catalyst free of noble metals, the catalyst being prepared by combining a spinel CuAl.sub.2 O.sub.3 with another spinel-forming metal component selected from the group consisting of tin, lead, zinc, magnesium, calcium, strontium and barium or mixtures thereof in elemental form or as an oxide or salt, and calcining at temperatures of 300.degree.-1300.degree. C. and under pressures of 0.1-200 bar in order to at least partially liberate the copper from the spinel by replacement with the other metal component.