Mineral oils: processes and products – Refining – Sulfur removal
Reexamination Certificate
2005-05-17
2005-05-17
Griffin, Walter D. (Department: 1764)
Mineral oils: processes and products
Refining
Sulfur removal
C208S21600R, C208S236000, C208S209000
Reexamination Certificate
active
06893554
ABSTRACT:
Naphtha is selectively hydrodesulfurized in the presence of a sulfided, treated catalyst comprising at least a Group VIB metal catalytic component, to produce sulfur-reduced naphtha with reduced olefin loss due to saturation. The catalyst is treated with hydrogen, a selectively deactivating agent which deactivates its hydrogenation activity, and a protective agent which preserves its hydrodesulfurization activity during the treatment.
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Brignac Garland B.
Smiley Randolph J.
Touvelle Michele S.
ExxonMobil Research and Engineering Company
Griffin Walter D.
Hughes Gerard J.
Nguyen Tam M.
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