Process for the preparation of alkanolamines having improved color quality

US6323371A · kind A · utility

Assignee

• BASF SE

Inventors

• Gunther Ruider · Monsheim, DE
• Karl-Heinz Ross · Grünstadt, DE
• Johann-Peter Melder · Schifferstadt, DE
• Gerhard Schulz · Ludwigshafen, DE
• Frank Gutschoven · Antwerpen, BE
• Philip Buskens · Hoogstraten, BE

Key dates

• Filing date: Mar 7, 2001
• Grant date: Nov 27, 2001
• Expiry date: Mar 7, 2021

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 an effective amount of phosphorous acid or hypophosphorous acid or compounds thereof initially at elevated temperature over a period of at least 5 min (step a), and then distilling it in the presence of an effective amount of one of these phosphorus compounds (step b).