Production of low sulfur distillates

Details Production of low sulfur distillates Production of low sulfur distillates

2000-04-20

2008-10-14

McAvoy, Ellen M. (Department: 1797)

Mineral oils: processes and products

Refining

Sulfur removal

C208S21600R, C208S217000, C208S015000, C585S014000

Reexamination Certificate

active

07435335

ABSTRACT:
A process for hydroprocessing a distillate stream to produce a stream exceptionally low in sulfur, with total aromatics and polynuclear aromatics being moderately reduced. A distillate stream is hydrodesulfurized in a first hydrodesulfurization stage. The product stream thereof is passed to a first separation stage wherein a vapor phase product stream and a liquid product stream are produced. The liquid phase product stream is passed to a second hydrodesulfurization stage and the product stream thereof is passed to a second separation stage wherein a vapor phase product stream and a liquid product stream low in sulfur are produced. At least a portion of the vapor product stream from said second separation stage can be cascaded to the first hydrodesulfurization stage.

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