Production of low sulfur/low aromatics distillates

C - Chemistry – Metallurgy – 10 – G

Patent

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Details

C10G 45/00 (2006.01) C10G 47/00 (2006.01) C10G 65/08 (2006.01) C10L 1/08 (2006.01)

Patent

CA 2402126

A process for producing distillate boiling range streams that are low in both sulfur and aromatics. A distillate feedstock is treated in a first hydrodesulfurization stage in the presence of a hydrogen-containing treat gas and a hydrodesulfurization catalyst, thereby resulting in partial desulfurization of the stream. The partially desulfurized distillate stream is then treated in a second hydrodesulfurization stage, also in the presence of a hydrogen-containing treat gas and a hydrodesulfurization catalyst. The hydrogen-containing treat gas is cascaded from the next downstream reaction stage, which is an aromatics hydrogenation stage.

L'invention se rapporte à un procédé de production de courants dans la plage d'ébullition de distillats, qui possèdent une faible teneur en soufre et en composés aromatiques. Une charge de distillat est traitée dans un premier étage d'hydrodésulfuration en présence d'un gaz de traitement contenant de l'hydrogène et un catalyseur d'hydrodésulfuration, ce qui entraîne une désulfuration partielle du courant. Le courant de distillat partiellement désulfuré est alors traité dans un second étage d'hydrodésulfuration, également en présence d'un gaz de traitement contenant de l'hydrogène et d'un catalyseur d'hydrodésulfuration. Le gaz de traitement contenant de l'hydrogène est déplacé en cascade à partir de l'étage de réaction aval suivant, qui est un étage d'hydrogénation des composés aromatiques.

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