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. 06, 2020
Filed:
Feb. 02, 2017
Applicant:
Basf SE, Ludwigshafen am Rhein, DE;
Inventor:
Norbert Asprion, Ludwigshafen, DE;
Assignee:
BASF SE, Ludwigshafen am Rhein, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07C 7/08 (2006.01); B01D 3/00 (2006.01); B01D 3/14 (2006.01); B01D 3/32 (2006.01); B01D 3/40 (2006.01); C07C 67/54 (2006.01); C07C 17/386 (2006.01); C01B 7/07 (2006.01); C07C 29/84 (2006.01); C07C 45/83 (2006.01); C07C 253/34 (2006.01); C07D 307/08 (2006.01); C07C 7/00 (2006.01); C07C 9/10 (2006.01); C07C 11/08 (2006.01); C07C 11/16 (2006.01);
U.S. Cl.
CPC ...
C07C 7/08 (2013.01); B01D 3/007 (2013.01); B01D 3/143 (2013.01); B01D 3/322 (2013.01); B01D 3/40 (2013.01); C01B 7/0712 (2013.01); C07C 7/005 (2013.01); C07C 17/386 (2013.01); C07C 29/84 (2013.01); C07C 45/83 (2013.01); C07C 67/54 (2013.01); C07C 253/34 (2013.01); C07D 307/08 (2013.01); C07C 9/10 (2013.01); C07C 11/08 (2013.01); C07C 11/16 (2013.01);
Abstract
A method for separating a mixture of materials A and B by extractive distillation, using an extraction medium having a higher affinity to B than to A, collecting a liquid fraction on a collecting tray and heated and partially evaporated in a first indirect heat exchanger, collecting the resultant vapor is released into the column and a non-evaporated proportion of the liquid fraction in the sump of the column, and a series of heating, separation and cooling where partially cooled extraction medium fraction is used as heating medium for a heat exchanger.