Liquefaction of municipal solid wastes (MSW) has been done in an atmosphere of hydrogen gas at 320 degrees C and 27.2 arm, using various catalysts including boric acid, nickel hydroxide and calcium hydroxide. It was found that boric acid gave the highest yield of pyrolytic oil derived from solid refuse. Hydrocarbon constituents of the oil mixtures, produced by liquefaction of cellulosic wastes slurried in a fuel oil and using different catalysts, were investigated by means of gas chromatography. From the results obtained, it was suggested that boric acid promotes the catalytic activity of transition metals present in the pyrolytic char, which also upgrades the liquid products via hydrocracking and hydrotreating of the oil mixture Basic catalysts, nickel hydroxide and calcium hydroxide, produced liquid hydrocarbons observed mainly in the range of C-11 - C-16 via hydrogenation of cellulosic matter present in MSW. The produced oil mixtures were characterized through different analytical parameters including API gravity, total acid number (TAN) and calorific value. It was found that the oil mixture, obtained using boric acid, has higher values than those produced using basic catalysts. In this investigation, two petroleum distillates, namely gas oil and fuel oil, were used as carrier media of solid refuse. Fuel oil seemed to be a more preferable carrier medium to produce higher grade liquid hydrocarbons having a lower content of aromatic compounds as evidenced by nuclear magnetic resonance spectroscopy.