8 the h 2 co ratio of the off gas leaving the reactor increased to 2 9 additional experiments were carried out using the general conditions described in example i for most of these experiments hydrogen and synthesis gas with h 2 co ratios of 1 1 and 2 1 were used at initial pressures of 1500 to 1800 psi operating pressures ranged from 2400 to 3400 psi at reaction temperatures of 370 u00b0 to 450 u00b0 c and the reaction was maintained for 5 to 60 minutes at the reaction temperature after the experiment rapid internal water cooling of the autoclave to ambient temperature was achieved total products were filtered at ambient or warmer temperatures to obtain liquid oils filter cakes containing residue and water were extracted by benzene the water was removed by azeotropic distillation and the remaining oil was recovered by removing the benzene with a rotary vacuum evaporator gaseous products were analyzed by mass spectrometry data on conversion oil yield hydrogen consumption and carbon dioxide formation etc are given as weight percent based on moisture and ash free maf coal the results of these experiments are given in tables i to iii below table i__________________________________________________________________________results of hydrodesulfurization of a hvb bituminous coal containing4 18 sulfur in a benzene soluble oil product containing 0 5 sulfur having akinematic viscosity of 2515 cs at 60 u00b0 c in which the watercontent in thefeed stock was varied 1500 psi initial pressure 430 u00b0 c 30min __________________________________________________________________________ synthesis gas 1h sub 2 1co.