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:
Dec. 09, 2008
Filed:
Jul. 22, 2003
Till Adrian, Bobenheim-Roxheim, DE;
Thomas Hill, Ludwigshafen, DE;
Klaus Kindler, Harthausen, DE;
Bernd Heida, Ellerstadt, DE;
Till Adrian, Bobenheim-Roxheim, DE;
Thomas Hill, Ludwigshafen, DE;
Klaus Kindler, Harthausen, DE;
Bernd Heida, Ellerstadt, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
In a continuous process for fractionating a Cfraction (C) by extractive distillation using a selective solvent (LM) in an extractive distillation column (EDK), it is proposed that a dividing wall (TW) is installed in the longitudinal direction in the extractive distillation column (EDK) to form a first region (A), a second region (B) and a lower combined column region (C) and a top stream (CH) comprising the butanes is taken off from the first region (A), a top stream (CH) comprising the butenes is taken off from the second region (B) and a stream (CH) comprising the hydrocarbons from the Cfraction which are more soluble in the selective solvent (LM) than are the butanes and the butenes is taken off from the lower combined column region (C).