Low CO for increased naphtha desulfurization

Details Low CO for increased naphtha desulfurization Low CO for increased naphtha desulfurization

2003-05-01

2008-09-09

Nguyen, Tam M. (Department: 1797)

Mineral oils: processes and products

Refining

Sulfur removal

C208S21600R, C208S213000, C208S209000

Reexamination Certificate

active

07422679

ABSTRACT:
Naphtha hydrodesulfurization selectivity is increased by reducing the amount of COX(CO plus ½ CO2) in the hydrodesulfurization reaction zone to less than 100 vppm. While this is useful for non-selective hydrodesulfurization, it is particularly useful for selectively desulfurizing an olefin-containing naphtha without octane loss due to olefin saturation by hydrogenation. The COXreduction is achieved by removing COXfrom the treat gas before it is passed into the reaction zone.

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