Mineral oils: processes and products – Refining – Sulfur removal
Reexamination Certificate
2007-10-02
2007-10-02
Caldarola, Glenn (Department: 1764)
Mineral oils: processes and products
Refining
Sulfur removal
C208S20800M, C208S237000, C208S240000, C208S25400R, C549S528000, C562S005000
Reexamination Certificate
active
10996402
ABSTRACT:
A robust, non-aqueous, and oil-soluble organic peroxide oxidant is employed for oxidative desulfurization and denitrogenation of hydrocarbon feedstocks including petroleum fuels. Even at low concentrations, the non-aqueous organic peroxide oxidant is extremely active and fast in oxidizing the sulfur and nitrogen compounds in the hydrocarbon feedstocks without catalyst. Consequently, the oxidation reactions that employ the non-aqueous organic peroxide oxidant take place at substantially lower temperatures and shorter residence times than reactions in other oxidative desulfurization and denitrogenation processes. As a result, a higher percentage of the valuable non-sulfur and non-nitrogen containing components in the hydrocarbon feedstock are more likely preserved with the inventive process. Desulfurization and denitrogenation occur in a single phase non-aqueous environment so that no phase transfer of the oxidant is required.
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Chuang Karl Tze-Tang
Huang Hsun-Yi
Hwang Jyh-Haur
Lin Tzong-Bin
Shen Hung-Chung
Caldarola Glenn
Cascio Schmoyer & Zervas
CPC Corporation, Taiwan
Singh Prem C.
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