Extraction method
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United States of America Patent
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-
Dec 28, 1999
Grant Date -
N/A
app pub date -
Jun 19, 1998
filing date -
Oct 11, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An extraction method is disclosed, where organic impurities are removed from a phase essentially containing sulfuric acid, by means of supercritical or liquid carbon dioxide. In particular, the spent sulfuric acid from a process for production of alkylate fuel may be regenerated for re-introduction into the process without incineration.
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