Hydrogen cyanide manufacturing process

Details Hydrogen cyanide manufacturing process Hydrogen cyanide manufacturing process

C - Chemistry, Metallurgy

01

C

23/47

C01C 3/02 (2006.01)

Patent

CA 1131880

ABSTRACT OF THE DISCLOSURE A modified Andrussow hydrogen cyanide process is provided which utilizes the carbon and hydrogen values in waste off-gas from the reaction zone. This modified process comprises: (1) purging an amount of off-gas sufficient to reduce the number of moles of nitrogen contained in a retained portion of off-gas to that present in the reactable gases: (2) adjusting the atomic ratios of hydrogen, carbon and oxygen in the retained off-gas by the addition of a carbon-containing fluid and optionally hydrogen; (3) contacting the retained adjusted off- gas with 2 methanation catalyst such that as to sub- stantially completely convert the carbon contained therein to methane; (4) condensing and removing water formed; (5) mixing the methanated off-gas with ammonia, oxygen and additional methane, if needed, to reconstitute the original feed; and (6) passing the mixture from step (5) to the reaction zone. IC 63l7

365965

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