| 摘要 |
A coal liquefaction process is provided in which a solvent is used to at least partially liquefy the coal. The process is maintained in solvent balance without extraneous addition of make-up solvent. The required balance is effected by selectively recovering from the liquefaction product an oil-containing liquid phase, at least a portion of the liquid phase being thereafter hydrogenated to form coal solvent in sufficient amount to replenish that lost. The selective recovery of the desired liquid phase is effected by means of a deasphalting solvent that preferentially separates asphaltenes and benzene insolubles from the coal extract. |
