Mineral oils: processes and products – Refining – Sulfur removal
Reexamination Certificate
2011-07-19
2011-07-19
Griffin, Walter D (Department: 1774)
Mineral oils: processes and products
Refining
Sulfur removal
C208S209000, C208S226000, C208S237000, C208S238000
Reexamination Certificate
active
07981276
ABSTRACT:
The present invention relates to a process for removing sulfur from sulfur-containing hydrocarbon streams utilizing a multi-ring aromatic hydrocarbon complex containing an alkali metal ion. Preferably, the sulfur-containing hydrocarbon stream is comprised of high molecular weight hydrocarbons, such as a low API gravity, high viscosity crude, tar sands bitumen, an oil derived from shale, or heavy refinery intermediate stocks such as atmospheric resids or vacuum resids which are typically difficult to desulfurize and contain relatively high amounts of sulfur. However, intermediate refinery streams and refinery product streams may also be treated by the process of the current invention to achieve very low sulfur concentrations to meet environmental specification for fuels sulfur content.
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Bearden, Jr. Roby
Myers Ronald D
Rauchfuss Thomas B.
Siskin Michael
Bordelon Bruce M.
ExxonMobil Research and Engineering Company
Griffin Walter D
Robinson Renee
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