Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Carbon dioxide or hydrogen sulfide component
Patent
1981-04-21
1983-08-16
Thomas, Earl C.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Carbon dioxide or hydrogen sulfide component
423231, 423244, 423539, 423564, B01D 5336
Patent
active
043991122
ABSTRACT:
A process for the catalytic incineration of residual gases containing a low content of H.sub.2 S and/or SO.sub.2, organic compounds of sulfur such as COS, CS.sub.2, mercaptans and possibly vapor and/or vesicular sulfur, comprising a hydrogenation stage which transforms all the sulfur compounds into H.sub.2 S followed by a catalytic oxidation stage to transform H.sub.2 S into SO.sub.2.
The catalyst used in the oxidation stage consists in a porous support, having a surface area of at least 5 m.sup.2 /g and containing, by weight, 50 to 100% of a product selected from the group comprising titanium or zirconium oxides, silica and zeolites, and 50 to 0% alumina, to which is associated one or several compounds of metals belonging to the group formed by Cu, Ag, Zn, Cd, Y, Lanthanides, V, Cr, Mo, W, Mn, Fe, Co, Rh, Ir, Ni, Pd, Pt, Sn and Bi. The use of such an oxidation catalyst leads to a practically quantitative yield of conversion of H.sub.2 S into SO.sub.2, this yield being maintained steadily throughout the process.
REFERENCES:
patent: 1900751 (1933-03-01), Baehr
patent: 2083894 (1937-06-01), Connolly
patent: 4012486 (1977-03-01), Singleton
patent: 4123507 (1978-10-01), Hass
patent: 4233276 (1980-11-01), D'Sousa et al.
patent: 4277458 (1981-07-01), Sugler et al.
Societe Nationale Elf Aquitaine
Thomas Earl C.
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