3255.     STANBURG, W. A.  Making Oil From Coal.  Coal Age, vol. 54, No. 7, 1949, pp. 70-77.

        Comprehensive survey of plant and process development in making oil from coal in accordance with the Government program as it is being carried out at the various plants operated by the Bureau of Mines.  The various steps in the coal-to-oil development are briefly described:  Coal preparation, cleaning, drying and storage; complete gasification, the vortex method, underground gasification, continuous high-temperature pebble-stove gasifier, O₂-steam gasification, O₂ production:  Fischer-Tropsch gas conversion and internally cooled and slurry-type converters; 2-stage hydrogenation, liquid- and vapor-phase processes, and economics.