Basf Aktiengesellschaft

Evonik Degussa Gmbh

Basf Aktiengesellschart

Basf Se Corporation

Carsten Jork

Matthias Seiler

Wolfgang Arlt

Bernd Weyershausen

Thomas Schneider

Hartmut Schoenmakers

York Alexander Beste

A working medium for refrigeration processes comprising at least one sorbent material and at least one refrigerant, characterized in that the sorbent material contains at least one nonvolatile organic salt which is liquid under standard conditions, or a mixture of organic salts, with the proviso that this is liquid under standard conditions, wherein the salt or the mixture has a thermal stability above 150&#xb0; C.

Working media for refrigeration processes

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.

Recycling of ionic liquids produced in extractive distillation

The invention relates to a process for separating close-boiling, homo- and heteroazeotropic mixtures by using ionic liquids. Due to the selectivity and unusual combination of properties of the ionic liquids the process is superior to conventional extractive rectification from the point of view of costs and energy.

Ionic liquids as selective additives for separation of close-boiling or azeotropic mixtures

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Berlin, Germany

Carsten Jork