fraction having the characteristics as shown in table 1 this bitumen had been extracted from the raw sands using a hot water extraction process hydrogen was introduced into the dissolver at a rate of 10 000 scf barrel of slurry the slurry had an hourly space velocity hsv of approximately one in the dissolver which was maintained at a pressure of 2400 psig and a temperature of 825 u00b0 f the effluent mixture of gases liquids and solids was passed to a gas liquid separator the liquid product had the properties shown in table 1 table 1______________________________________bitumen and coal feed andcorefined product inspections river king athabasca corefined coal bitumen product______________________________________api gravity at 60 u00b0 f 10 2 20 2c wt 57 11 84 51 86 24h wt 3 96 10 47 11 05o wt 14 90 0 45 0 57s wt 4 38 4 16 1 72n wt 1 21 0 41 0 42h c 0 83 1 49 1 54viscosity at 100 u00b0 c cst 46 8 2 2ni ppm 75 5v ppm 1355 167 8fe ppm 3768 204 lt 3coal conversion wt 82 8 1000 1000 yield 85 8 wt ______________________________________ hydrogen consumption 875 scf bbl as can be seen from table 1 the corefined liquid product has properties which are desirable for a petroleum feedstock for further refining to useful products including transportation fuels such as gasoline kerosene and diesel fuel or heating fuels for domestic and industrial boilers a portion of the corefined liquid product of example 1 is used as a solvent for the river king coal in zone 11 the recycle liquid.