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. 10, 2014
Filed:
May. 06, 2010
Tilmann Steinmetz, Gruenstadt, DE;
Michael Nilles, Bobenheim-Roxheim, DE;
Lucia Koenigsmann, Stuttgart, DE;
Andreas Heussler, Hassloch, DE;
Nikolaus Zafred, Ludwigshafen, DE;
Tilmann Steinmetz, Gruenstadt, DE;
Michael Nilles, Bobenheim-Roxheim, DE;
Lucia Koenigsmann, Stuttgart, DE;
Andreas Heussler, Hassloch, DE;
Nikolaus Zafred, Ludwigshafen, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The invention relates to a process for obtaining at least one aromatic amine from a liquid mixture comprising water and the at least one aromatic amine by extracting with at least one nitroaromatic in an extraction column () to form an essentially water- comprising raffinate stream and an extract stream comprising the at least one nitroaromatic and the aromatic amine. The extraction column () is divided by a dividing wall () into two regions (), and, in the case of an amount of liquid for separation which is less than a minimum cross sectional loading of the entire extraction column (), the liquid mixture to be separated is fed only to one of the regions () of the extraction column () divided by the dividing wall (). The invention further relates to a process for preparing an aromatic amine and to an apparatus for separating a liquid mixture comprising water and at least one aromatic amine by extracting with at least one nitroaromatic, comprising an extraction column ().