Jgc Corporation

Japan Oil, Gas and Metals National Corporation

Shigeki Nagamatsu

Makoto Inomata

Takayoshi Fujimoto

Tomoki Kayukawa

Tetsuya Watanabe

Akira Sugimoto

Shogo Teratani

Susumu Kasahara

Toshiya Okumura

Jun Abe

Naohisa Inoue

Hikari Egami

According to the method of manufacturing refined oil of the present invention, refined oil which has a viscosity of 20 cst or lower at 135&#xb0; C., a pour point of 30&#xb0; C. or lower, an alkali metal content of 1 wt ppm or less, a vanadium content of 10 wt ppm or less and a sulfur content of 0.3 wt % or lower can be prepared, by bringing feed oil into contact with hydrogen in the presence of the demetalizing/desulfurizing catalystand the hydrogenolysis catalyst. This method can decrease the viscosity, pour point and sulfur concentration of the refined oil to sufficiently low levels, and decreases the production cost.

Refined oil and process for producing the same

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 H/Oil ratio of 70 to 200 Nm/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 HOil ratio of 200 to 800 Nm/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).

Method of desulfurizing gas oil fraction, desulfurized gas oil, and desulfurizer for gas oil fraction

A petroleum processing method comprising the steps of: performing an atmospheric distillation of crude oil; collectively hydrodesulfurizing the resultant distillates consisting of gas oil and fractions whose boiling point is lower than that of gas oil in a reactor in the presence of a hydrogenation catalyst at 310 to 370&deg; C. under 30 to 70 kg/cm G (first hydrogenation step); and further performing hydrodesulfurization at lower temperatures (second hydrogenation step). When the second hydrogenation step is carried out only for the heavy naphtha obtained by separating the distillates after the first hydrogenation step, the second hydrogenation temperature can be in the range of 250 to 400&deg; C.

Petroleum processing method

Growing community of inventors

Yokohama, Japan

Shigeki Nagamatsu