Process for recovery of sulfur values from a gas stream
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United States of America Patent
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Oct 15, 1991
Issued Date -
N/A
app pub date -
Jul 2, 1990
filing date -
Aug 16, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention is a process wherein SO.sub.2 is absorbed in a concentrated solution of potassium citrate and the solution is reacted with H.sub.2 S at a temperature above the melting point of sulfur to form elemental sulfur. The reaction produces a solution lean in sulfur dioxide. SO.sub.2, in the form of a rich solution or a gas, can be introduced into the lean solution in order to inhibit post-formation of sulfur. This introduction of SO.sub.2 avoids a tendency for sulfur to form continually after the solution exits the reaction zone.
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