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:
Feb. 10, 2015
Filed:
Aug. 30, 2012
Hermann Luyken, Ludwigshafen, DE;
Sebastian Ahrens, Wiesloch, DE;
Gordon Brasche, Frankfurt, DE;
Jens Baldamus, Ludwigshafen, DE;
Robert Baumann, Mannheim, DE;
Randolf Hugo, Dirmstein, DE;
Stephanie Jaegli, Mannheim, DE;
Johann-peter Melder, Böhl-Iggelheim, DE;
Jörg Pastre, Bensheim, DE;
Boris Buschhaus, Mannheim, DE;
Hermann Luyken, Ludwigshafen, DE;
Sebastian Ahrens, Wiesloch, DE;
Gordon Brasche, Frankfurt, DE;
Jens Baldamus, Ludwigshafen, DE;
Robert Baumann, Mannheim, DE;
Randolf Hugo, Dirmstein, DE;
Stephanie Jaegli, Mannheim, DE;
Johann-Peter Melder, Böhl-Iggelheim, DE;
Jörg Pastre, Bensheim, DE;
Boris Buschhaus, Mannheim, DE;
BASF SE, Ludwigshafen, DE;
Abstract
A process is disclosed for separating the output from the reaction of EDDN or EDMN with hydrogen in the presence of THF, a catalyst, TETA or DETA, water, and optionally organic compounds having higher and lower boiling points than TETA or DETA. Hydrogen is removed, and the output is supplied to a distillation column DK1 in which an azeotrope, optionally comprising organic compounds with a boiling point lower than TETA or DETA, is removed from the top. A product comprising TETA or DETA is removed from the bottom and passed into a distillation column DK2, removing THF. A stream comprising TETA or DETA passes from the bottom of DK2. The DK1 azeotrope is condensed. Phase separation is induced by the addition of an organic solvent essentially immiscible with water, and the mixture is separated. The organic phase is recycled into DK1 and the water phase is discharged.