| 摘要 |
The invention provides a coal hydrogenation process for producing clean hydrocarbon liquid and gas products, comprising: (a) slurrying coal 10 with a process- derived oil 15 and feeding the coal-oil slurry with hydrogen 17 to a catalytic hydrogenation reaction zone 22; (b) withdrawing effluent material 27 and phase-separating it to provide gaseous and liquid fractions; (c) adding acid 45 to the resulting separated bottoms liquid fraction 44 and precipitating asphaltenes and coal solids; (d) withdrawing from the acid precipitation step an overhead liquid stream 47/15 containing a reduced concentration of preasphaltenes and solids, and recycling said stream to the reaction zone; (e) withdrawing a heavy hydrocarbon bottom stream 48 containing precipitated preasphaltenes and coal solids for further processing; and (f) withdrawing a hydrocarbon liquid product stream 42/54 with low sulphur and ash contents. <IMAGE> |
