| 摘要 |
H2S is removed from an H2s-rich gas (1) and sulfur (60) is produced, by a process in which the H2S-rich gas is reacted with SO2 (24) in a reactor (101) in the presence of an organic solvent and a catalyst. An H2S-containing off-gas (5) is removed from the reactor (101) and is combusted (104) to produce an SO2-rich combustion gas (10). Preferably, the reactor off-gas is combusted with a substoichiometric amount of oxygen so that the combustion gas also contains water vapor and sulfur vapor. The combustion gas is cooled by direct quench (234) or indirect heat exchange to produce an aqueous stream (31) containing primarily water, suspended solid sulfur and polythionic acids (e.g. Wackenroder's liquid), and the aqueous stream is used to provide cooling for the H2S-SO2 reaction. Problems associated with production and handling of Wackenroder's liquids are overcome and sulfur values in these materials are recovered.
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