Basf Aktiengesellschaft

Dieter Stapf

Kai Rainer Ehrhardt

Bernd Bartenbach

Olaf Scheidsteger

Michael Bachtler

Mayke Mueller-Eversbusch

Peter P&auml;ssler

A process is described for preparing hydrogen cyanide by autothermal noncatalytic oxidation of one or more nitrogenous hydrocarbons or a nitrogenous hydrocarbon mixture in which the nitrogenous hydrocarbons, an oxygen-containing gas, with or without ammonia, with or without water, with or without a gas containing nitrogen oxides and with or without other essentially inert feed gas constituents are introduced into a flame reaction zone, react in the flame reaction zone and a post-reaction zone at a temperature of from 1000 to 1800&#xb0; C. for a reaction time of 0.03 to 0.3 s to form a cleavage gas which comprises at least the constituents hydrogen cyanide, carbon oxides, hydrogen, water, ammonia, nitrogen, light hydrocarbons with or without other cleavage gas constituents, the atomic C/N ratio in the reaction zones being from 1 to 7 and the atomic air ratio &#x3bb;being &#x3c;0.6, the cleavage gas being cooled and separated.

Method for the production of hydrocyanic acid by oxidation of nitrogen-containing hydrocarbons in a flame

The invention relates to a process for the preparation of acetylene and synthesis gas by thermal treatment of a starting mixture containing one or more hydrocarbons and in addition molecular oxygen and/or one or more compounds containing the element oxygen, in which the starting mixture is heated, brought to reaction in a reactor and subsequently cooled. The process has the special feature that the starting mixture is heated to a maximum of 1400&deg; C. It is then possible to carry out the process with comparatively little expenditure of energy.

Preparation of acetylene and synthesis gas

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Brasschaat, Belgium

Dieter Stapf