Process for removing sulfur compounds from hydrocarbon streams
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United States of America Patent
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Oct 23, 2001
Issued Date -
N/A
app pub date -
Oct 22, 1999
filing date -
Apr 17, 1998
priority date (Note) -
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Abstract
A process for removing H.sub.2 S and mercaptans from a hydrocarbon stream is disclosed. A hydrocarbon stream such as a LPG stream is contacted with a weakly basic stream, e.g., a sodium bicarbonate stream in order to extract the H.sub.2 S and mercaptans from the hydrocarbon stream into the basic stream. The basic stream is now treated in a reactor containing a sulfide oxidizing microorganism in order to convert the H.sub.2 S to sulfur and the mercaptans to disulfides. Finally, the sulfur and disulfides are separated from the basic aqueous stream which can be recycled and used to treat a fresh hydrocarbon stream. The treated hydrocarbon stream is purified to the point that it passes the copper strip test, while the purified basic stream contains less than 0.08 g/l of elemental sulfur.
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