Patent ID: 7276150
Filing Date: 2007-10-02
Classification: B01J,C10G

Abstract:
1. A process for desulfurizing a straight-run gas oil fraction, comprising: a low-boiling straight-run gas oil fraction hydrodesulfurization step (I) wherein a low-boiling straight-run gas oil fraction obtained by fractionating a straight-run gas oil fraction into two fractions at a cut point t° C. wherein the cut point satisfies the expression of 280≦t≦360 (° C.) is desulfurized under the conditions of a H a high-boiling straight-run gas oil fraction hydrodesulfurization step (II) wherein a high-boiling straight-run gas oil fraction obtained by fractionating a straight-run gas oil fraction into two fractions at a cut point t° C. is desulfurized under the conditions of a H a step (III) wherein the treated oil obtained in the step (I) is mixed with the treated oil obtained in the step (II) to obtain the treated oil having a sulfur content of not more than 50 ppm, wherein at least a part of a gas containing unreacted hydrogen in the step (II) is used for the hydrodesulfurization of the step (I), and wherein unreacted hydrogen in the step (I) is not directly used for hydrodesulfurization of the step (II).