Process for the removal of selenium from selenium-containing aqueous streams
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United States of America Patent
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Dec 8, 1998
Issued Date -
N/A
app pub date -
Sep 15, 1994
filing date -
Jun 23, 1993
priority date (Note) -
Expired
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Abstract
A selenium-containing aqueous stream may be used as a quenching water stream and optionally a cutting water stream in a delayed coking process to effectuate the removal of selenium from the selenium-containing aqueous stream resulting in the formation of a selenium-coke product. In addition, selenium may be concentrated in selenium-containing stripped sour water streams by recycling the stream in one or more hydroprocessing units and one or more sour water stripper units and subsequently removed by using a portion of the selenium-containing stripped sour water stream as a quenching water stream and optionally a cutting water stream in a delayed coking process.
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