| 摘要 |
PURPOSE:To improve the recovery of oil without increasing the consumption of hydrogen, by blowing a hydrogen-containing gas obtained from the hydrogenation reaction product to the first hydrogenation reaction column, and carrying out the hydrogenation under a specific condition while stripping the light oil component from the solvent. CONSTITUTION:A slurry mixture of coal powder and solvent is preheated and supplied to a plurality of hydrogenation reaction columns connected in series to effect the hydro-cracking. In the above process, the gaseous product is separated from the hydrogenation reaction product in each reaction column, the light oil component and water are removed from the gaseous product, and the obtained hydrogen-containing gas is introduced to the bottom of at least the first hydrogenation reaction column. The hydrogenation is carried out while stripping the light oil component in the solvent in a manner that the weight ratio of the fraction having a boiling point of 300-420 deg.C (reduced to normal pressure) in the solvent existing in the reaction column to the sum of the coal and the fraction having a boiling point of >=420 deg.C in the slurry mixture becomes 0.20-1.20.
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