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:
Feb. 04, 2003
Filed:
Aug. 01, 2000
Gerd Emmrich, Essen, DE;
Bärbel Kolbe, Witten, DE;
Helmut Gehrke, Essen, DE;
Frank Ennenbach, Essen, DE;
Uwe Ranke, Essen, DE;
Krupp Uhde GmbH, Dortmund, DE;
Abstract
The invention relates to a rectifying column for extractive distillation, comprising a column main section ( ) and a raffinate section ( ) above said main section, an evaporator ( ) situated on the lower end of the column, an inlet ( ) disposed between the main section of the column and the raffinate section and a solvent inlet ( ) arranged on the top side of the raffinate section ( ) for feeding an extracting agent. According to the invention, the main section ( ) has two chambers ( ) connected in parallel. A stripping section ( ) is disposed between the bottom of the column ( ) and the main section ( ), in which concentration of the extracting agent occurs from the top down. The bottom ( ) is connected to the solvent inflow ( ) by a device ( ) for recycling the extracting agent.