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AssigneeSociete Nationale Elf Aquitaine (Production)
InventorsRobert Voirin, Pierre Mathieu, Claude Chambu
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In a process for desulphurizing gases containing SO.sub.2 and SO.sub.3 by absorption of the sulphur containing compounds by means of absorbents based on alumina free of alkaline substances, activated alumina or alumina carrying salts or oxides of at least one element selected from the groups IB, IIB, IVB, VB, VIB, VIIB, VIII of the Periodic Classification, the absorption takes place at temperatures comprised between 100.degree. and 400.degree. C., and the absorbent loaded with said compounds in the form of sulphates is heated with a gas containing a reducing gas, especially H.sub.2 S, to a temperature of 250.degree. C. to 450.degree. C., while the elementary sulphur thus formed is separated from said absorbent, whereafter the latter is re-used in a subsequent absorption operation.
A process for desulphurizing gases containing SO.sub.2 and SO.sub.3, O.sub.2 and nitrogen oxide by absorption of the sulphur containing compounds by means of an absorbent comprising contacting said gas with an activated alumina free of alkaline substances absorbent at a temperature between 100.degree. and 400.degree. C., heating the resulting absorbent loaded with said compounds in the form of alumina sulphates with a reducing gas at a temperature of 250.degree. C. to 450.degree. C., separating the elementary sulphur thus formed from said absorbent, and thereafter reusing the absorbent in a subsequent absorption operation.
Dependencies are inferred from the claim text.