Mineral oils: processes and products – Refining – Sulfur removal
Reexamination Certificate
2006-08-08
2006-08-08
Nguyen, Tam M. (Department: 1764)
Mineral oils: processes and products
Refining
Sulfur removal
C208S213000, C208S354000, C208S244000, C208S249000, C208S299000, C208S305000, C585S820000, C585S822000, C585S823000
Reexamination Certificate
active
07087156
ABSTRACT:
The present invention is directed to the removal of nitrogen and sulfur containing impurities from high molecular weight petroleum feedstock obtained from fluid cracking catalyst or distillation zone of a petroleum treatment plant. The present process comprises first treating C12and higher hydrocarbon petroleum feedstock having nitrogen and sulfur containing compounds therein with a porous, particulate adsorbent comprising a silica matrix having an effective amount of metal atoms therein to cause the adsorbent to have Lewis acidity of at least 500 μmol/g and then treating the resultant feedstock to catalytic hydrodesulfurization to produce a hydrocarbon fuel having low sulfur and nitrogen content.
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Lesemann Markus Friedrich Manfred
Setzer Constance
Cross Charles A.
Nguyen Tam M.
Troffkin Howard J.
W.R. Grace & Co. - Conn.
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