1972. KOWALSKI, J., AND GONDZIK, J. [Cracking of Higher-Boiling Benzene Hydrocarbons to Motor Fuel.] Przeglad Gorniczy., vol. 6, 1950, pp. 203-208; Chem. Abs., vol. 44, 1950, p. 10307.

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Literature Abstracts

Synthetic fraction b. 200°-300° from the Fischer-Tropsch process was cracked at 550° and 5-25 atm. with a contact time of 0.5 sec. to produce 71% of gasoline of 61 octane no. without C formation. Contrary to expectations, a mixture of 71.6% of the synthetic oil and 28.4% of the aromatic fraction from coke-oven-gas manufacture (initial b. p., 156°, 95% up to 193°) will crack at the relatively low optimum temperature of 660° and 25 atm. pressure to yield 65% of gasoline of 78.7 octane no. without any C formation. It is calculated that conversion of the aromatics in the mixture to gasoline was 80% greater than in cracking the aromatic fraction alone. The feasibility of the process on a large scale was confirmed by cracking of mixtures of the synthetic oil and the aromatic fraction in different proportions in a Carburol-type unit of 110-ton-per-day capacity, at a recycle ratio of 5:1.

KOZHENOVA, K. T. See abs. 1662.