Catalysts and the process for their production

US4105590A · kind A · utility

Assignee

• Deutsche Gold- und Silber-Scheideanstalt Vormals Roessler

Inventors

• Edgar Koberstein · Alzenau, DE
• Eduard Lakatos · Gelnhausen, DE

Key dates

• Filing date: Nov 22, 1976
• Grant date: Aug 8, 1978
• Expiry date: Nov 22, 1996

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A catalyst is described capable of inducing reduction in nitrogen oxide pollutants of exhaust gases from internal combustion engines and industrial plants. The catalyst composition is formed from a mixture of catalytically active aluminum oxides and a mixture of at least two metal oxides, one which is chromium oxide and the other is an oxide of an element of the First Transition Series, impregnated with about 1% by weight of an impregnant comprising a catalytically active noble metal compound. An optional constituent of the catalyst compositions includes 0.5-10% by weight of beryllium, magnesium, calcium, strontium or barium in the mixed oxide composition.