| 摘要 |
U.S. 716,036 An increased yield of hydrogenated liquid product is obtained by treating feed coal with a hydrogen-donor solvent and hydrogen-containing gas in a first coal liquefaction reactor to produce a liquefaction effluent comprising a vaporous stream and a liquid stream consisting of a low molecular weight liquid fraction containing some mineral matter. A heavy bottoms stream containing less than about 50 weight percent of the low molecular weight liquid fraction based on the weight of the high molecular weight liquid fraction is treated with additional fresh hydrogen-donor solvent and hydrogen-containing gas in a second coal liquefaction reactor from which additional liquid hydrocarbonaceous products are obtained. Hydrogen-donor solvent may be produced in the process by catalytically hydrogenating at least a portion of the liquid product from each liquefaction reactor. |
