Catalyst precursors

US4772579A · kind A · utility

Assignee

• IMPERIAL CHEMICAL INDUSTRIES LIMITED · GB

Inventors

• Terence Thistlethwaite · Middlesbrough, GB
• Johan ter Maat · Mannheim, DE
• Peter J. Davidson · Darlington, US

Key dates

• Filing date: Oct 28, 1986
• Grant date: Sep 20, 1988
• Expiry date: Oct 28, 2006

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2235/30
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Catalyst precursor units, e.g. for ammonia synthesis catalysts, comprise an iron oxide composition in the form of sintered shaped units of substantially uniform cross section having a plurality, e.g. 13 to 50 or more, through passages of substantially uniform cross section. The passages preferably have a diameter of less than 1.5, particularly less than 0.7, mm.