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. 05, 2007
Filed:
Feb. 06, 2002
Applicants:
Gerd Bohner, Malsch, DE;
Klaus Kindler, Harthausen, DE;
Melanie Pahl, Mannheim, DE;
Gerd Kaibel, Lampertheim, DE;
Inventors:
Gerd Bohner, Malsch, DE;
Klaus Kindler, Harthausen, DE;
Melanie Pahl, Mannheim, DE;
Gerd Kaibel, Lampertheim, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Primary Examiner:
Int. Cl.
CPC ...
B01D 3/40 (2006.01); B01D 3/42 (2006.01); C07C 7/08 (2006.01); C07C 11/167 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for recovering crude 1,3-butadiene from a Cfraction by extractive distillation using a selective solvent in a dividing wall column (TK) in which a dividing wall (T) is arranged in the longitudinal direction of the column to form a first subregion (A), a second subregion (B) and a lower common column region (C) and which is preceded by an extractive scrubbing column (K) is proposed.