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Return to Abstracts of Patents Return to Abstracts of Patents 1000-1249 Patent Abstracts1179. ------.[I. G. Farbenindustrie, A. G. Alcohols] Catalytic Cracking of Hydrocarbons. British Patent 521,687, May 29, 1940. Chem. Abs., vol. 36, 1942, p. 1479. Yield of nonknocking motor fuel is increased by passing the hydrocarbon oil in the liquid or vapor phase at a cracking temperature and at an initial pressure of 1-100 atm. through a reaction zone containing a cracking catalyst and increasing the pressure in the reaction zone continuously or stepwise by at least 5 atm., preferably 10 atm., while the catalyst is acting on the hydrocarbon oil without interruption of the process. |