Catalyst for purification of exhaust gases and processes for its production and use

US4048098A · kind A · utility

Assignee

• Deutsche Gold- und Silber-Scheideanstalt Vormals Roessler

Inventors

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

Key dates

• Filing date: Feb 4, 1974
• Grant date: Sep 13, 1977
• Expiry date: Feb 4, 1994

Classification

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

Abstract

A carrier catalyst comprises as the catalytically active component an intermetallic system of at least three metals, wherein at least one of said three metals is selected from the group consisting of (a) ruthenium, rhodium, palladium and platinum, and wherein at least one of said three metals is a base metal selected from the group consisting of (b) aluminum, titanium, chromium, manganese, cobalt and nickel, and further wherein said group (a) metals and said group (b) metals are in an atomic ratio of about 1:4 to 1:1, provided that, when said system contains platinum, rhodium and at least one of said base metals, the atomic ratio is 1:4 to 1:2.4. The catalyst can also contain aluminum.