Recycling of ionic liquids produced in extractive distillation

Details Recycling of ionic liquids produced in extractive distillation Recycling of ionic liquids produced in extractive distillation

2004-07-15

2009-02-03

Manoharan, Virginia (Department: 1797)

Distillation: processes, separatory

Convective distillation with normally gaseous medium, e.g., air

C203S050000, C203S099000, C203SDIG019

Reexamination Certificate

active

07485208

ABSTRACT:
Process for working up a bottom stream wherein high boilers and ionic liquid from an extractive rectification in which the ionic liquid is used as entrainer. The process includes feeding the bottom stream to an evaporation stage which is operated at a pressure of less than 500 mbar or to a stripper which is operated through use of inert gas or steam, and the major part of the high boiler present is separated off in vapor form from the ionic liquid.

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patent: WO-02/074718 (2002-09-01), None
patent: WO-03/040264 (2003-05-01), None

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