Purification of gas mixtures

Details Purification of gas mixtures Purification of gas mixtures

1980-02-14

1982-03-16

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Molecular oxygen or ozone component

423239, 423362, 423648A, 423656, 55 73, 48206, B01D 5336, C01B 302, C01C 104

Patent

active

043201008

ABSTRACT:
The invention concerns a process for the purification of a hydrogen-containing gas mixture comprising up to 45% by volume of hydrogen, together with carbon oxides, hydrogen cyanide and impurities including nitrogen oxides and/or oxygen. The process comprises passing the gas over a sulphur-resistant hydrogenation catalyst at a temperature of from 120.degree. C. to 250.degree. C. and at a pressure of from 0.5 to 250 bar to remove the nitrogen oxides and/or oxygen therefrom while substantially avoiding hydrogen cyanide removal. The gas may be obtained from a Koppers-Totzek gasifier and may be used for the production of ammonia after further purification. The sulphur-resistant catalyst may be a nickel molybdate or cobalt molybdate catalyst or a metal from Group VI and/or Group VIII of the Periodic Table.

REFERENCES:
patent: 3393979 (1976-01-01), Eisenlohr et al.
patent: 4041130 (1977-08-01), Mackles
patent: 4175928 (1979-11-01), Britton et al.
patent: 4189307 (1980-02-01), Marion
Grosskinsky, "Handbuch des Kokereiwesens," Karl Knapp Verlag, Dusseldorf, pp. 214-216.

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