Evonik Operations Gmbh

Catrin Dorothee Becker

Martin Körfer

Thorsten Merker

Michael Eicker

Marko Bussmann

The present invention relates to a process for the purification of hydrogen cyanide, comprising the steps of a) splitting a liquid feed stream () comprising hydrogen cyanide into at least a first liquid stream () and a second liquid stream (), b) introducing the first liquid stream () into a distillation column () at a point between the top and the bottom of the distillation column, c) introducing the second liquid stream () into the distillation column () at the top of the distillation column, d) withdrawing an overhead vapor stream () enriched in hydrogen cyanide from the distillation column (), and e), withdrawing a bottom stream () depleted in hydrogen cyanide, wherein the temperature of the second liquid stream () in step c) is lower than the temperature of the first liquid stream () in step b).

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Frankfurt-am-Main, Germany

Catrin Dorothee Becker