Abstract: A process for the hydrogenation of coal which entails slurrying pulverized coal with oil, hydrogenating the mixture at an elevated temperature and pressure and separating the liquid and solid reaction products from the gaseous reaction products, wherein the slurry oil contains non-process derived hydrocarbon mixtures having a boiling range above about 200.degree. C., in the amount of about 30-100% by weight with the remainder of the slurry oil being process derived oils having a boiling range above about 200.degree. C.

Abstract: A process for the production of reformer feed and heating or diesel oil from coal which comprises introducing a pulverized coal-oil slurry together with a hydrogenation gas into a liquid-phase hydrogenation stage; remoping solids-containing residue from the discharge from the liquid phase hydrogenation stage, cooling the resulting residue-free volatile coal-oil fraction from the discharge and, if necessary, removing a slurry oil fraction therefrom before feeding the volatile coal-oil fraction to a gas-phase hydrogenation stage; introducing fresh hydrogen which is substantially free of contaminants into the gas-phase hydrogenation stage together with the volatile coal-oil fraction, the fresh hydrogen introduced into the gas-phase hydrogenation stage constituting the entire amount of hydrogen required for the process; and utilizing the waste-gas from the gas-phase hydrogenation as the hydrogenation gas for the liquid-phase hydrogenation.

Abstract: A method for low temperature carbonization of coal hydrogenation residues, wherein a coal hydrogenation residue is subjected to a reduced pressure distillation in a one-shaft or multishaft screw extruder, liberated gases and vapors are drawn off, and non-volatilized remaining material is subjected to low temperature carbonization in a screw extruder.

Abstract: A method of producing synthesis gas from coal hydrogenation residues, wherein a coal hydrogenation residue is subjected to a reduced pressure distillation in a one-shaft or multishaft worm apparatus where the gases and vapors evolved are withdrawn and the unvolatilized remaining material is re-pressurized and is then introduced into a gasification reaction.