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1673. KARZHEV, V. I., AND SEVER’YANOVA, M. G. [Catalytic Cracking of the Synthin Fraction.] Khim. Tverdogo Topliva, vol. 9, 1938, pp. 71-76; Chem. Abs., vol. 32, 1938, p. 9436.
Synthin fractions boiling at 80°-150°, 150°-200°, and 200°-250° were introduced from burettes by drops into a quartz tube placed in an electric furnace. The catalysts were placed in the tube in a 25-cm. layer in that portion of the tube that had a constant temperature. The product was passed through with a constant velocity of 5 m.3/hr. The temperature of experiments was varied within the range 475°-550°. The following catalysts were used: Cr-Cu-P, H3PO4, activated coal as a carrier, Cr-Cu and Cr prepared by special method (not disclosed) the best being the last catalyst. The catalytic cracking of various fractions of synthin over the above catalyst at 475°-525° at atmospheric pressure yielded about 85-90% of liquid products and 10-15% of gaseous products. The practical formation of coke was not observed. The composition of the products obtained justifies the assumption that they have a high octane number.
KASAI, K. See abs. 1904.