Process for the preparation of a mixture of cyclohexylamine and dicyclohexylamine using a supported noble metal catalyst

US5322965A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Otto Immel · Krefeld, DE
• Gerhard Darsow · Krefeld, DE
• Helmut Waldmann · Leverkusen, DE
• Gerd-Michael Petruck · Erkrath, DE

Key dates

• Filing date: Aug 27, 1993
• Grant date: Jun 21, 1994
• Expiry date: Aug 27, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2601/14
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Optionally substituted cyclohexylamine and optionally substituted dicyclohexylamine can be obtained by catalytic hydrogenation of optionally substituted aniline, a catalyst being employed which contains ruthenium, palladium or a mixture of both metals, which are applied to a support of niobic acid or tantalic acid or a mixture of both. The catalyst contains the noble metal(s) in a total amount from 0.05 to 5% by weight, relative to the total weight of the catalyst. In the case of the use of both noble metals, their weight ratio to one another is 1:9-9:1.