2243. ------. [METALLGESELLSCHAFT A. G.]. Gases Rich in Hydrogen. British Patent 504,529, Apr. 26, 1939; appl. filed July 26, 1938. Chem. Abs., vol. 33, 1939, p. 7997.

In the production of gas mixtures containing CO and H₂ in the volume ratio of about 1 : 2 for synthesis purposes by the gasification of fuels under several atm. pressure by means of O₂-steam mixtures, the proportion of O₂ used being about 0.1-0.2 m.³ per m.³ of gas produced (calculated at normal temperature and pressure), CO₂ is added to the gasification medium in amounts of 0.5-3 times the vol. of O₂ employed. In an example, coke is gasified under 10 atm. pressure with a gas mixture comprising about 0.13 m.³ O₂, 0.65 kg. steam and 0.2 m.³ CO₂ to produce a gas mixture in which the CO and H₂ are 21 and 42%, respectively. CO₂ is washed from the gas mixture under pressure, and a part is returned to the producer for addition to the gasification medium. Inferior tars or oils or gaseous hydrocarbons may be added to the gasification medium and are cracked in the product.