Krupp Uhde Gmbh

Alstom Technology Limited

General Electric Technology Gmbh

Frank Ennenbach

Olaf Stallmann

Gerd Emmrich

Ulrich Koss

Uwe Ranke

Helmut Gehrke

B&auml;rbel Kolbe

Jutta Narjes

Markus Weitzel

Christian Britz

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.

Rectifying column for extractive distillation of close-boiling or azeotropic boiling mixtures

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Essen, Germany

Frank Ennenbach