459. DANULAT, F. (Metallgesellschaft A. G.). [Synthesis Gas.] German Patent 700,940, Dec. 5, 1940 (Cl. 24 e-1.07). Chem. Abs., vol. 35, 1941, p. 7689.

Patent Abstracts

459. DANULAT, F. (Metallgesellschaft A. G.). [Synthesis Gas.] German Patent 700,940, Dec. 5, 1940 (Cl. 24 e-1.07). Chem. Abs., vol. 35, 1941, p. 7689.

Coal is distilled under pressure of several atm. of O₂ and H₂O vapor and temperature, which leads to the formation of CH₄. To the gaseous mixture of O₂ and H₂O is added CO₂ 0.5-3 fold the volume of O₂. This impedes the formation of CH₄, and the end product has a CO:H₂ ratio of 1:2 or more. The CO₂ is separated from the end product and reused. Before entering the generator the CO₂ is doused with hot H₂O (from the cooler) and is thereby saturated with H₂O vapor. The CO₂ itself or mixed with the H₂O vapor is preheated before entering the generator.