1124.    FURTH, A., AND MUNDERLOH, H.  Braunkohle und ihre Chemische Verwendung.  Theodor Steinkopff, Dresden; Iron and Coal Trades Rev., vol. 163, Aug. 10, 1951, p. 310.

        Statistical data and a summary of the theories concerning the origin of brown coal and the structure of the derivatives are first presented followed by a description of low-temperature carbonization of brown coal.  The most significant recent development is the introduction of the Lurgi furnace with forced gas circulation and electrostatic tar precipitation.  All pertinent patent specifications are reviewed.  Gas scrubbing methods for the production of light fractions of oils are presented together with methods for the utilization of brown coal coke.  Gas producers are unable to utilize raw brown coal, the moisture content of which is 50-55%, but several types of producers fed with brown-coal briquets are included.  Distillation of the tar for production of benzol, diesel fuel, lubricating oil, fuel oil, paraffin wax and pitch, and the solvent extraction and cracking of tar are described.  The various processes for the production of synthetic fuel, including the Fischer-Tropsch hydrogenation process, as applied to brown coal are considered.  A summary of the patent literature and a description of the drying and briquetting processes complete the book.