Jgc Corporation

Akira Sugimoto

Tsuyoshi Okada

Makoto Inomata

Yoshinori Mashiko

Tetsuya Watanabe

Shigeki Nagamatsu

Jun Abe

The present invention relates to a method in which grades of oil are refined according to their object from a feed oil. This method has a solvent extraction process that obtains an extracted oil, and a hydrogenation process that subjects the obtained extracted oil to hydrogenation process in the presence of hydrogen and a catalyst to obtain a hydrorefined oil. The solvent extraction conditions are selected by using the poly-aromatic concentration as an index for calculating the concentration of heptane insoluble components in the residue of the extracted oil obtained by the solvent extraction process that cannot be fractionally distilled.

Method of refining heavy oil and refining apparatus

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

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Yokohama, Japan

Akira Sugimoto