Mineral oils: processes and products – Refining – Nitrogen contaminant removal
Reexamination Certificate
2011-01-11
2011-01-11
Nguyen, Tam M (Department: 1771)
Mineral oils: processes and products
Refining
Nitrogen contaminant removal
C208S091000, C208S067000, C208S113000, C208S085000, C208S31000R, C585S820000
Reexamination Certificate
active
07867381
ABSTRACT:
A feedstream to an FCC unit is treated to remove or reduce the content of polynuclear aromatics and nitrogen-containing compounds by contacting the feedstream with an adsorbent compound selected from attapulgus clay, alumina, silica gel and activated carbon in a fixed bed or slurry column and separating the treated feedstream that is lower in the undesired compounds from the adsorbent material. The adsorbent can be mixed with a solvent for the undesired compounds and stripped for re-use.
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Abelman ,Frayne & Schwab
Nguyen Tam M
Saudi Arabian Oil Company
LandOfFree
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