The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 26, 2024
Filed:
Jul. 17, 2019
Evonik Operations Gmbh, Essen, DE;
Martin Körfer, Kahl, DE;
Michael Eicker, Bergisch Gladbach, DE;
Catrin Dorothee Becker, Frankfurt, DE;
Thorsten Merker, Erftstadt, DE;
Marko Bussmann, Bornheim, DE;
Evonik Operations GmbH, Essen, DE;
Abstract
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).