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:
Mar. 23, 2010
Filed:
Apr. 18, 2008
Thomas Knebel, Schifferstadt, DE;
Gerd Saas, Einselthum, DE;
Wolfgang Schreieck, Ludwigshafen, DE;
Horst Schroeder, Bad Duerkheim, DE;
Manfred Winter, Dittelsheim-Hessloch, DE;
Thomas Knebel, Schifferstadt, DE;
Gerd Saas, Einselthum, DE;
Wolfgang Schreieck, Ludwigshafen, DE;
Horst Schroeder, Bad Duerkheim, DE;
Manfred Winter, Dittelsheim-Hessloch, DE;
BASF SE, Ludwigshafen, DE;
Abstract
A process for the preparation of alkyleneimines by subjecting sulfuric acid monoesters of aminoalkanols to an at least two-stage reaction with aqueous bases at a temperature of at least 110° C. under pressure, relieving the pressure of the reaction mixture and distilling off the alkyleneimines from the reaction mixture after each reaction stage, wherein the conversion in the first stage is from 40 to 90% and that in the second stage is from more than 90% to 99.99%.