1914. KOLLING, H., ROTTIG, W., AND TRAMM, H. (Ruhrchemie A. G.). [Aromatization and Dehydration of Hydrocarbons.] French Patent 860,007, Aug. 8, 1939. Chem. Zentralb., 1941, II p. 267.

Hydrocarbon oils boiling up to 200° obtained by the synthesis of hydrocarbons from CO and H₂ may be used as the raw material. Synthetic gasoline is made knock-proof by passing over MgO with 30-50% Cr₂O₃.

See German Patent 736,839 (abs. 2833).