Process for preparing pure triethanolamine (TEOA)

USRE45240E1 · kind E1 · reissue

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: Nov 21, 2013
• Grant date: Nov 11, 2014
• Expiry date: Nov 21, 2033

Classification

• Technology area (CPC —): General

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supplying the resulting bottom stream comprising TEOA to a downstream column (TEOA column) in which the pure TEOA is withdrawn as a side draw stream, wherein the residence time of the ethanolamine mixture in the bottom of the DEOA column is 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.