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:
Jul. 29, 2014
Filed:
Dec. 16, 2011
Frank-friedrich Pape, Kleinniedesheim, DE;
Johann-peter Melder, Böhl-Iggelheim, DE;
Alfred Krause, Speyer, DE;
Roland Bou Chedid, Mannheim, DE;
Martin Rudloff, Gönnheim, DE;
Frank-Friedrich Pape, Kleinniedesheim, DE;
Johann-Peter Melder, Böhl-Iggelheim, DE;
Alfred Krause, Speyer, DE;
Roland Bou Chedid, Mannheim, DE;
Martin Rudloff, Gönnheim, DE;
BASF SE, Ludwigshafen, DE;
Abstract
A process for preparing an N,N-dialkylethanolamine of the formula I having high color stability where Rand Rare each independently a C- to C-alkyl group, by reacting ethylene oxide (EO) with a corresponding dialkylamine (RRNH) in the presence of water, wherein the reaction is effected continuously in a reactor, the reaction temperature is in the range from 90 to 180° C. and the residence time (RT) in the reactor is in the range from 1 to 7 min, the reactor output is treated thermally at a temperature in the range from 80 to 160° C. over a period in the range from 20 to 1000 min, and then the N,N-dialkylethanolamine is removed by distillation.