Mineral oils: processes and products – Refining – Sulfur removal
Reexamination Certificate
2007-03-20
2007-03-20
Caldarola, Glenn (Department: 1764)
Mineral oils: processes and products
Refining
Sulfur removal
C208S014000, C208S143000, C208S209000, C208S230000, C208S235000
Reexamination Certificate
active
10826621
ABSTRACT:
The invention is a method of removing sulfur from a hydrocarbon feed using the steps of dissolving metallic sodium in a solvent and combining the sodium/solvent solution with a liquid hydrocarbon feed containing an organosulfur species. The pressure of combination is above the vapor pressure of the solvent. The combined hydrocarbon feed and solvent solution are placed in a low pressure environment to vaporize the solvent. The resulting stream is combined with hydrogen gas and this stream is heated and pressurized to form a liquid hydrocarbon product containing sodium sulfide. This product is then cooled, and the sodium sulfide is extracted.
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Shaddox Robert C
Singh Prem C.
Trans Ionics Corporation
Winstead Sechrest & Minick P.C.
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