Desulfurization method of gas oil fraction, desulfurized gas oil and gas oil fraction of desulfurization equipment

摘要

The process for desulfurizing a gas oil fraction according to the invention comprises a low-boiling gas oil fraction hydrodesulfurization step (I) wherein a low-boiling gas oil fraction is desulsurized under the condition of a H2/Oil ratio of 70 to 200 Nm3/kl to obtain a treated oil, a high-boiling gas oil fraction hydrodesulfurization step (II) wherein a high-boiling gas oil fraction is desulsurized under the condition of a H2/Oil ratio of 200 to 800 Nm3/kl to obtain a treated oil, and a step (III) wherein the treated oil obtained in the step (I) is mixed with the treated oil obtained in the step (II), and in this process, at least a part of a gas containing unreacted hydrogen in the step (II) is used for the hydrodesulfurization of the step (I). According to the invention, there can be provided a process and an apparatus for desulfurizing a gas oil fraction, which are capable of using hydrogen and energy efficiently and capable of producing a highly desulfurized gas oil in a small catalytic amount. According to the invention, further, a desulfurized gas oil which is economically produced and has a sufficiently decreased sulfur content can be provided. According to the invention, furthermore, there can be provided an apparatus for desulfurizing a gas oil fraction, which is capable of using a hydrogen gas and energy efficiently, capable of being simplified in its constitution, capable of reducing cost of equipment, control of apparatus, labor of maintenance, apparatus area, etc. and capable of highly desulfurizing a gas oil fraction economically. IMAGE