574.    CLARK, A., ANDREWS, A., AND FLEMING, H. W.  Composition of a Synthetic Gasoline.  Ind. Eng. Chem., vol. 41, No. 7, 1949, pp. 1527-1532; Chem. Abs., vol. 43, 1949, p. 7211.

      S fractions from a gasoline synthesized from CO and H₂ in the presence of a fluidized Fe catalyst of the synthetic NH₃ type at about 600° F. were percolated through silica gel.  Each fraction was broken down into 4 types:  Paraffins, olefins, aromatics, and oxygenated compounds.  Some additional information was obtained on the character of the gasoline fractions.  40-50% by volume of the C₅, C₆, and C₇ fractions consist of straight-chain 1-olefins.  15 different aromatic compounds were identified as being present in the 1^st 6 fractions.  Evidence is fairly conclusive that small amounts of diolefins exist in most of the fractions.