Mineral oils: processes and products – Refining – Sulfur removal
Reexamination Certificate
2007-08-07
2007-08-07
Nguyen, Tam M. (Department: 1764)
Mineral oils: processes and products
Refining
Sulfur removal
C208S211000, C208S212000, C208S219000, C208S220000, C208S222000, C208S223000, C208S224000, C585S833000
Reexamination Certificate
active
10323215
ABSTRACT:
A process is disclosed for the production of refinery transportation fuel or components for refinery blending of transportation fuels having a reduced amount of sulfur and/or nitrogen-containing impurities. The process involves contacting a hydrocarbon feedstock containing the above impurities with an immiscible phase containing hydrogen peroxide and acetic acid in an oxidation zone to selectively oxidize the impurities. After a gravity phase separation, the hydrocarbon phase containing any remaining oxidized impurities, is passed to an extraction zone wherein aqueous acetic acid is used to extract a portion of any remaining oxidized impurities. A hydrocarbon stream having reduced impurities can then be recovered. The acetic acid phase effluents from the oxidation and the extraction zones can then be passed to a common separation zone for recovery of the acetic acid and for optional recycle back to the oxidation and extraction zones.
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Gong William H.
Huff George A.
Kruse Larry W.
Muskett Michael
BP Corporation North America Inc.
Nguyen Tam M.
Schoettle Ekkehard
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