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:
Oct. 09, 2007
Filed:
Oct. 02, 2004
Wolfgang Reif, Frankenthal, DE;
Hans Hammer, Mannheim, DE;
Guenther Ruider, Wachenheim, DE;
Anton Meier, Birkenheide, DE;
Philip Buskens, Hoogstraten, BE;
Matthias Frauenkron, Freinsheim, DE;
Wolfgang Reif, Frankenthal, DE;
Hans Hammer, Mannheim, DE;
Guenther Ruider, Wachenheim, DE;
Anton Meier, Birkenheide, DE;
Philip Buskens, Hoogstraten, BE;
Matthias Frauenkron, Freinsheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
Process for separating triethanolamine continuously by distillation from a mixture of monoethanolamine, diethanolamine and triethanolamine together with ethanolamine ethers and water obtained by reaction of ammonia with ethylene oxide in the liquid phase under superatmospheric pressure and at elevated temperature, in which the mixture is distilled in two stages. The low-boiling fraction and the high-boiling fraction are taken off and discharged in the first stage and the intermediate-boiling fraction comprising >99.4% by weight of triethanolamine and <0.2% by weight of diethanolamine is distilled in the second stage. The distillation of the mixture is preferably carried out in a first column and a second column connected to this or in a dividing wall column.