Method of refining petroleum

An oil refining method for producing oil products including a plurality of intermediate oil products by refining a feed oil, comprising:

• a fractional distillation process wherein the feed oil is distilled and separated into a distillate and a residue;
• a hydrorefining process wherein at least a part of the distillate obtained in the fractional distillation process is refined and desulfurized by hydrogenation in the presence of hydrogen and a catalyst thereby to obtain a hydrorefined oil;
• a solvent deasphalting process wherein the residue is deasphalted with a solvent thereby to obtain deasphalted oil as an extract and asphaltene (pitch) as the residue;
• a hydrodemetalizating/desulfurizing process wherein at least a part of the deasphalted oil is demetalized and desulfurized by hydrogenation in the presence of hydrogen and a catalyst thereby to obtain an HDMS refined oil that has been demetalized and desulfurized;
• a vacuum fractional distillation process wherein the HDMS refined oil is distilled in a vacuum and separated into vacuum gas oil and vacuum residue;
• and
• a second mixing process wherein at least a part of the vacuum gas oil and at least a part of the hydrorefined oil are mixed thereby to obtain one of the oil products.

An oil refining method for producing oil products including a plurality of intermediate oil products by refining a feed oil, comprising:

• a fractional distillation process wherein the feed oil is distilled and separated into a distillate and a residue;
• a hydrorefining process wherein at least a part of the distillate obtained in the fractional distillation process is refined and desulfurized by hydrogenation in the presence of hydrogen and catalyst thereby to obtain a hydrorefined oil;
• a vacuum fractional distillation process wherein the residue is distilled in a vacuum and separated into a vacuum gas oil and a vacuum residue;
• a solvent deasphalting process wherein the vacuum residue is deasphalted with a solvent thereby to obtain deasphalted oil as an extract and asphaltene (pitch) as the residue;
• a hydrodemetalizating/desulfurizing process wherein the vacuum gas oil and the deasphalted oil are mixed and the mixture is demetalized and desulfurized by hydrogenation in the presence of hydrogen and a catalyst thereby to obtain an HDMS refined oil that has been demetalized and desulfurized;
• and
• a third mixing process wherein a part of the HDMS refined oil and at least a part of the hydrorefined oil are mixed thereby to obtain one of the oil products.

An oil refining method for producing oil products including a plurality of intermediate oil products by refining a feed oil, comprising:

• a fractional distillation process wherein the feed oil is distilled and separated into a distillate and a residue;
• a solvent deasphalting process wherein the residue obtained in the fractional distillation process is deasphalted with a solvent thereby to obtain deasphalted oil as an extract and asphaltene (pitch) as the residue;
• a hydrodemetalizating/desulfurizing process wherein at least a part of the deasphalted oil is demetalized and desulfurized by hydrogenation in the presence of hydrogen and a catalyst thereby to obtain an HDMS refined oil that has been demetalized and desulfurized;
• and
• a fourth mixing process wherein a part of the HDMS refined oil and at least a part of the distillate are mixed thereby to obtain one of the oil products.

An oil refining method for producing oil products including a plurality of intermediate oil products by refining a feed oil, comprising:

• a fractional distillation process wherein the feed oil is distilled and separated into a distillate and a residue;
• a solvent deasphalting process wherein the residue obtained in the fractional distillation process is deasphalted with a solvent thereby to obtain deasphalted oil as an extract and asphaltene (pitch) as the residue;
• a hydrodemetalizating/desulfurizing process wherein at least a part of the deasphalted oil is demetalized and desulfurized by hydrogenation in the presence of hydrogen and a catalyst thereby to obtain an HDMS refined oil that has been demetalized and desulfurized;
• a vacuum fractional distillation process wherein the HDMS refined oil is distilled in a vacuum and separated into a vacuum gas oil and a vacuum residue;
• and
• a fifth mixing process wherein at least a part of the vacuum gas oil and at least a part of the distillate are mixed thereby to obtain one of the oil products.

An oil refining method for producing oil products including a plurality of intermediate oil products by refining a feed oil, comprising:

• a fractional distillation process wherein the feed oil is distilled and separated into distillate and a residue;
• a vacuum fractional distillation process wherein the residue obtained in the fractional distillation process is distilled in a vacuum and separated into a vacuum gas oil and a vacuum residue;
• a solvent deasphalting process wherein the vacuum residue is deasphalted with a solvent thereby to obtain deasphalted oil as an extract and asphaltene (pitch) as the residue;
• a hydrodemetalizating/desulfurizing process wherein the vacuum gas oil and the deasphalted oil are mixed and the mixture is demetalized and desulfurized by hydrogenation in the presence of hydrogen and a catalyst thereby to obtain an HDMS refined oil that has been demetalized and desulfurized;
• and
• a sixth mixing process wherein a part of the HDMS refined oil and at least a part of the distillate are mixed thereby to obtain one of the oil products.