Process for the recovery of sulphur from a hydrogen sulphide, containing gas
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United States of America Patent
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Nov 25, 2003
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N/A
app pub date -
May 1, 2001
filing date -
Aug 25, 1998
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Abstract
The invention is directed to a process for the recovery of sulphur from a hydrogen sulphide containing gas, which process comprises; i) oxidizing part of the hydrogen sulphide in a gaseous stream with oxygen or an oxygen containing gas in an oxidation stage to sulphur dioxide; ii) reacting the product gas of this oxidation stage in at least two catalytic stages, in accordance with the Claus equation: 2 H.sub.2 S+SO.sub.2.fwdarw.2 H.sub.2 O+3/n S.sub.n ; iii) catalytically reducing SO.sub.2 in the gas leaving the last of said at least two catalytic stages, wherein the catalytic reduction takes place in a catalyst bed downstream from the last Claus catalytic stage.
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