2104. MALCOMES, W. (Koppers Co.). Gas From Bituminous Coal and Lignite. United States Patent 2,190,293, Feb. 13, 1940; appl. filed Nov. 11, 1936, Serial No. 110,211; in Germany Nov. 12, 1935; 4 claims (Cl. 202-16). Chem. Abs., vol. 34, 1939, p. 4258.

Arrangement of apparatus is described for the production of coke and gas of a predetermined ratio of H₂:CO. The upper part of the continuously descending mass of bituminous fuel is heated from without to about 350°. The lower part of the mass is heated to about 950°. Gas from the upper part is removed, detarred, and adjusted in steam content according to the desired H₂:CO ratio. It is then introduced into the lower part of the descending mass of highly heated coke. The high-temperature gas produced from the lower high-temperature coking part of the descending mass, together with the gas formed from the detarred and steam-adjusted low-temperature coking gas, is removed from the descending mass at a region between upper and lower zones.