Process for preparing pure triethanolamine (TEOA)

US8466323B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Johann-Peter Melder · Schifferstadt, DE
• Gunther Van Cauwenberge · Lokeren, BE
• Tom Fremau · Brasschaat, BE
• Jürgen Moors · Bad Kötzting, DE
• Thilo Hahn · Kirchheimbolanden, DE
• Bernd Stein · San Diego, US

Key dates

• Filing date: Dec 10, 2009
• Grant date: Jun 18, 2013
• Expiry date: Mar 7, 2030

Classification

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

Abstract

A process for preparing pure triethanolamine (TEOA) by continuously distillatively separating an ethanolamine mixture comprising TEOA and diethanolamine (DEOA), by distilling off DEOA in a distillation column (DEOA column) and supplying the resulting bottom stream comprising TEOA to a downstream column (TEOA column) in which the pure TEOA is withdrawn as a side draw stream, wherein the residence time of the ethanolamine mixture in the bottom of the DEOA column is <20 minutes.