489. DIDIER-WERKE A. G. Coking Process; Gas Producers. British Patent 461,402, Feb. 16, 1937. Chem. Abs., vol. 31, 1937, p. 5548.

Patent Abstracts

Gas of stoichiometric composition is obtained from fuels, for example, brown coal, lignite, flame coal, by preheating the fuel by external heating and removing the products, carbonizing the fuel in an externally heated chamber, and leading the high-temperature gas with steam through a body of incandescent coke resulting from the carbonization to effect the substantial conversion of the gases into the desired mixture of H₂ and CO. For the treatment of brown coal, the preheating, carbonizing, reaction, and water gas chambers may be of Fe, SiC material, SiO₂ material, and fire clay, respectively.