Process for liquefying coal

摘要

In a process for liquefying coal under elevated pressure and at elevated temperature in a reaction zone, it is proposed to feed the reaction product leaving the reaction zone to a coking zone and to cool the gases and vapours arising there, predominantly distillate oil vapours, preferably in direct exchange with the fresh coal paste. The gases and vapours not condensed in this heat exchange are taken off from the plant as end product. By means of the proposed procedure, the oil production is partially displaced from the reaction zone to the coking zone, so that the reaction zone can be operated under a low pressure. Furthermore, a major part of the quantity of exothermic heat generated in the liquefaction reactions can be recycled to the process by the direct heat exchange of the product vapours with the fresh coal paste.