Method for lightening heavy oil by using coke production byproduct

A method for upgrading a heavy oil using a by-product from coke production, the method comprising:

• a) mixing the heavy oil with the by-product from coke production to prepare a mixed solution in a batch reactor;
• b) after step a), adding a hydrogenation catalyst to the mixed solution;
• c) after step b), filling the reactor with hydrogen gas to set an initial hydrogen partial pressure to 30 to 70 bar at a first reaction temperature;
• and
• d) after step c), performing a hydrocracking reaction of the heavy oil under a stirring speed of 1000 to 2000 rpm and a second reaction temperature which is higher than the first reaction temperature;
• wherein the hydrogenation catalyst includes Mo-octoate,
• wherein the by-product from coke production is produced in a coke production process including:
• crushing and drying coal to prepare coking coal;
• and
• dry distilling the coking coal at 800 to 1300° C. to produce lump coke,
• in which a liquid by-product produced in the producing of lump coke is distilled at 130 to 600° C. under atmospheric pressure conditions or 30 to 400° C. under vacuum conditions of 0.5 bar to produce the by-product from coke production,
• wherein the by-product from coke production has an aromatic ratio in a range of 80 to 90% based on the total compounds contained in the by-product from coke production, and wherein the by-product from coke production has a ratio of a compound having a boiling point distribution of 200 to 400° C. of 80 to 95% based on the total compounds contained in the by-product from coke production;
• and
• wherein a content of aromatic hydrogen bonded to aromatic hydrocarbon is 65 to 95% based on the total functional group bonded to the aromatic hydrocarbon.