Process for the preparation of alkanolamines having improved color quality

US6291715A · kind A · utility

Assignee

• BASF SE

Inventors

• Gunther Ruider · Monsheim, DE
• Karl-Heinz Ross · Grünstadt, DE
• Boris Breitscheidel · Fulda, DE
• Heike Maier · Ludwigshafen, DE
• Gerhard Schulz · Ludwigshafen, DE
• Sylvia Huber · Zwingenberg, DE

Key dates

• Filing date: Aug 23, 2000
• Grant date: Sep 18, 2001
• Expiry date: Aug 23, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C213/10
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Preparation of alkanolamines having improved color quality by treating the alkanolamine with hydrogen in the presence of a hydrogenation catalyst at elevated temperature, by using, as hydrogenation catalyst, a heterogeneous catalyst comprising Re, Ru, Rh, Pd, Os, Ir, Pt and/or Ag and a support material chosen from the group consisting of activated carbon, alpha-aluminum oxide, zirconium dioxide and titanium dioxide, where the catalyst, in the case of activated carbon as support material, has a cutting hardness of at least 10 N, a side crushing strength of at least 30 N or a compressive strength of at least 25 N.