Mineral oils: processes and products – Refining – Sulfur removal
Reexamination Certificate
2007-05-29
2007-05-29
Caldarola, Glenn (Department: 1764)
Mineral oils: processes and products
Refining
Sulfur removal
C208S203000, C208S207000, C210S513000, C210S538000, C210S532100, C422S256000
Reexamination Certificate
active
10690353
ABSTRACT:
The present invention is an apparatus and process for oxidizing mercaptans in a preferably kerosene stream. By using a catalyst promoter, sufficient separation of hydrocarbon and aqueous alkali occurs in the reactor vessel to obviate the need for a settling tank. Hence, the sweetened kerosene can be withdrawn from the reactor vessel and sent directly to a residual alkali removal unit such as a sand filter vessel or to a water wash vessel if jet grade fuel is desired. In an embodiment, the reactor vessel used for this purpose includes a reaction section and a separation section in the same reactor vessel and an aqueous alkali outlet and a sweetened hydrocarbon outlet in the separation section.
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Caldarola Glenn
Douglas John
Paschall James C.
UOP LLC
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