Basf Aktiengesellschaft

Karlheinz Stecher

Rolf Schneider

Fritz Brunnmueller

Michael Kroener

Waldemar Koehler

Berthold Mueller

Ubbo V Oehsen

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.

Preparation of the reaction products of hydrogen cyanide

A process for the thermolytic cleavage of formamide to give hydrocyanic acid and water over alumina or alumina/silica moldings subjected to final sintering or over high temperature corrosion-resistant stainless steel packings in the presence of atmospheric oxygen possesses, in particular, high HCN selectively and a high formamide conversion.

Cleavage of formamide to give hydrocyanic acid and water

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Ludwigshafen, Germany

Karlheinz Stecher