GB341444A - Improvements in or relating to the purification of sulphur containing gases or vapours - Google Patents

Abstract

341,444. Gas-purifying compositions and processes. BRITISH CELANESE, Ltd., 22, Hanover Square, London, BADER, W. and SHELMERDINE, E. J., of British Celanese, Spondon, near Derby. Oct. 10, 1929, No. 30718. [Class 55 (ii).] Gases such as crude carbon monoxide, producer gas, or water gas, are purified from organic sulphur compounds by contact with a heated catalyst consisting of or comprising alumina, in the presence of steam to the amount of about 20 per cent of the volume of the gases treated. The sulphur in the gas is converted to sulphuretted hydrogen which is then removed, for instance by iron oxide. Suitable catalysts are precipitated alumina, bauxite, or mixtures of alumina with other oxides such as manganese dioxide and the temperature range extends from 200‹ to 550‹ C. If iron oxide is present in the catalyst, a lower temperature should be used, for example 250‹ to 350‹ C. ; and to avoid any reaction between the carbon monoxide and the steam, a temperature of over 500‹ C. should be avoided. The catalyst may be deposited on carriers such as pumice.