Process for removing sulphur compounds contained in a residual g

Details Process for removing sulphur compounds contained in a residual g Process for removing sulphur compounds contained in a residual g

1990-08-16

1992-07-21

Russel, Jeffrey E.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

C01B 1704

Patent

active

051320983

ABSTRACT:
Process for removing sulfur compounds contained in a residual gas with recovery of said compounds in the form of sulfur, wherein a gas obtained from a residual gas containing H.sub.s S and SO.sub.2 and having a temperature lower than 160.degree. C. is subjected to a catalytic CLAUS reaction phase with deposition of sulfur on the catalyst and periodic regeneration of the sulfur-laden catalyst and cooling of the regenerated catalyst. The gas brought in contact with the CLAUS catalyst is produced by subjecting the residual gas to a hydrogenation and hydrolysis treatment to provide the sulfur compounds in the unique form of H.sub.2 S and to cooling with water separation by condensation and then to catalytic oxidation of H.sub.2 S in CLAUS stoichiometry with cooling of the gas stream obtained from the oxidation step under 160.degree. C. in order to separate the sulfur by condensation. Application to the purification of the residual gases emitted by CLAUS sulfur plants.

REFERENCES:
patent: 4097585 (1981-06-01), Fischer
patent: 4436716 (1984-03-01), Kvasnikoff et al.
patent: 4479928 (1984-10-01), Voirin
patent: 4552746 (1985-11-01), Kettner et al.
patent: 4605546 (1986-08-01), Voirin
Lauer et al., Chemical Engineering Techniques, Reinhold Publishing Corp., 1952, pp. 220-222.
Olsen, Unit Processes and Principles of Chemical Engineering, Van Nostrand Co., Inc., 1932, pp. 1-3.

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