The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 18, 2013
Filed:
Dec. 10, 2009
Johann-peter Melder, Böhl-lggelheim, DE;
Gunther Van Cauwenberge, Lokeren, BE;
Tom Fremau, Brasschaat, BE;
Jürgen Moors, Kressel-Lo, DE;
Thilo Hahn, Kirchheimbolanden, DE;
Bernd Stein, Alsbach-Hähnlein, DE;
Johann-Peter Melder, Böhl-lggelheim, DE;
Gunther Van Cauwenberge, Lokeren, BE;
Tom Fremau, Brasschaat, BE;
Jürgen Moors, Kressel-Lo, DE;
Thilo Hahn, Kirchheimbolanden, DE;
Bernd Stein, Alsbach-Hähnlein, DE;
BASF SE, , DE;
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supplying the resulting bottom stream comprising TEOA to a downstream column (TEOA column) in which the pure TEOA is withdrawn as a side draw stream, wherein the residence time of the ethanolamine mixture in the bottom of the DEOA column is 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.