method for producing sulphur from hydrogen sulphide and sulphur dioxide and device for implementing the procedure

摘要

1406085 Recovering sulphur from gase SHELL INTERNATIONALE RESEARCH MAATCHAPPIJ NV 15 Sept 1972 42920/72 Heading C1A Sulphur is recovered from H 2 S and SO 2 by partially combusting a H 2 S-containing gas with a free O 2 -containing gas in the presence of a SO 2 -containing gas, the S formed being separated and the remaining gas passed to a catalyst to form additional S, wherein the amount of SO 2 -containing gas is such that the mole per cent of SO 2 introduced externally to that formed during combustion is at least 25%. The mole ratio of H 2 S : SO 2 in the gases introduced may be between 10 : 1 and 2 : 1. A C 1 -C 5 gaseous hydrocarbon fuel may be mixed with the H 2 S- containing gas to maintain the temperature at 700-1400‹ C. in an amount of 1-25 mole per cent of the H 2 S contact. The catalyst may be activated bauxite. Prior to and after catalyst treatment the S may be removed by condensation. Further catalyst stages may be used.