| 摘要 |
PURPOSE:To utilize excellent proton-donative property of a polycyclic aromatic hydrocarbon as a hydrogen-donative solvent and to especially improve the yield of light oil, by using the hydrocarbon obtained as a component of a hydroliquefaction oil as a medium oil for the hydroliquefaction reaction of coal. CONSTITUTION:Coal slurry dispersed in a medium oil is hydroliquefied in the presence of a catalyst, the produced oil is distilled in vacuum and the residue is subjected to dry distillation preferably at 500-700 deg.C. The dry distillation oil containing large amount of polycyclic aromatic hydrocarbon is hydrogenated to obtain hydrogenated dry-distillation oil, which is used as the above medium oil. The hydrogenation of the dry-distillation oil is usually carried out by using an Ni-Mo catalyst at 300-400 deg.C under 150-300kg/cm<2>G pressure and an LHSV of 0.5-2.
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