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:
Nov. 07, 2006
Filed:
Nov. 15, 2001
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 3/42 (2006.01); C07C 11/167 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for obtaining pure 1,3-butadiene from crude 1,3-butadiene by distillation is carried out in a dividing wall column in which a dividing wall is located in the longitudinal direction of the column to form an upper common column region, a lower common column region, a feed section and an offtake section.