| 摘要 |
A process for two-stage catalytic co-processing of coal and heavy petroleum fractions to produce increased yields of lowboiling hydrocarbon liquid and gas products. In the process, the particulate coal is slurried with a petroleum residuum and optionally with a process-derived liquid solvent and fed into a first stage catalytic reaction zone operated at relatively mild conditions which promote controlled rate liquefaction of the coal while simultaneously hydrogenating the petroleum and hydrocarbon recycle oils at conditions favoring hydrogenation reactions. The first stage reactor is maintained at 650-800.degree.F temperature, 1500-3500 psig hydrogen partial pressure and 10-100lb/hr/ft3 space velocity for the total coal and oil feed. From the first stage reaction zone the partially hydrogenated material is passed directly to the second stage catalytic reaction zone maintained at more severe conditions of 750-900.degree.F temperature for further hydrogenation and catalytic hydroconversion reactions. By this process, the blended coal and petroleum feed materials are successively catalytically hydrogenated and hydroconverted at the selected conditions, which results in significantly increased yields of desirable low-boiling hydrocarbon liquid products and minimal production of undesirable residuum and unconverted coal and hydrogen gases, while catalyst life is substantially increased. |
