| 摘要 |
PURPOSE:To improve the yield of a liquid hydrocarbon, by subjecting solvent- purified coal obtained by hydrogenation reaction of coal to a deashing step, removing only the ash, and circulating preasphaltene separated in the deasphalting step through the hydrogenation reaction. CONSTITUTION:For example, a slurrying agent and catalyst are added to coal dust, and the resultant mixture is brought to a high-temperature state. The mixture is then fed to the primary hydrogenation region, and high-pressure hydrogen is introduce thereinto to carry out the primary hdrogenation reaction at a high temperature under high pressure. The hydrogenated material is then distilled to separate naphtha and a solvent fraction as a product. The solvent- purified coal (CLB) is then subjected to a deashing step and deashed to prevent the accumulation of the ash in the system. After deashing, the CLB is fed to a deasphalting step to separate preasphaltene, which is circulated through the primary hydrogenation step to improve the yield of the distillate oil.
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