Hoechst Aktiengesellschaft

Clariant Corporation

Hans-Bodo Richter

Bernd Felix

Herbert Strasser

Ulrich Reiff

Rudolf Huber

Norbert Paul

Continuous process for the preparation of pentafluoroethyl iodide from iodine, iodine pentafluoride and tetrafluoroethylene, which comprises dissolving the iodine in iodine pentafluoride and continuously feeding the resulting solution to a vertical bubble column ( ), which is filled with iodine pentafluoride and at its lower end has a feed line for tetrafluoroethylene, where the reaction zone is maintained at from 85 to 95&deg; C., preferably 90&deg; C., and the pentafluoroethyl iodide formed escapes in gaseous form at the top of the reactor ( ), is liquefied in a downstream cooled condenser and is drawn off into storage vessels.

Continuous process for the preparation of pentafluoroethyl iodide

An apparatus suitable in particular for degassing fluoropolymers which have been subjected to thermal degradation contains--in the direction of flow of the product--a product intake, a coolable conveyor section, a comminution apparatus, a heated conveyor section and a product discharge, the entire apparatus being designed to be gastight and advantageously being designed to be resistant to pressure surges and having a gas outlet in the area of the coolable conveyor section and/or in the area of the comminution apparatuses.

Degassing apparatus and use thereof

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Burgkirchen, Germany

Hans-Bodo Richter