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

US7294325B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Kai Rainer Ehrhardt · Speyer, DE
• Mayke Mueller-Eversbusch · Mannheim, DE
• Dieter Stapf · Brasschaat, BE

Key dates

• Filing date: Jul 24, 2003
• Grant date: Nov 13, 2007
• Expiry date: Feb 28, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01C3/0245
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

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° 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 λato being <0.6, the cleavage gas being cooled and separated.