Preparation of the reaction products of hydrogen cyanide

US4745207A · kind A · utility

Assignee

• BASF SE

Inventors

• Fritz Brunnmueller · Schifferstadt, DE
• Karlheinz Stecher · Ludwigshafen, DE
• Michael Kroener · Mannheim, DE
• Rolf Schneider · Burgstetten, DE

Key dates

• Filing date: Nov 25, 1985
• Grant date: May 17, 1988
• Expiry date: Nov 25, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01C3/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Reaction products of hydrogen cyanide are prepared by a process in which hydrogen cyanide prepared in a conventional manner by pyrolysis at from 250.degree. to 650.degree. C. over a solid under from 5 to 200 mbar is cooled to a temperature of from 200.degree. to -10.degree. C. together with the other pyrolysis products, the hydrogen cyanide is then fed to a chemisorption reaction with a base or with a carbonyl compound, and the reaction products of hydrogen cyanide which are formed therein are removed from the system and brought to atmospheric pressure. In this process, the handling of large amounts of hydrogen cyanide is avoided.