2563.     PARDUN, H.  [Dependence of the Yield of Fatty Acid Upon the Stage of Oxidation of Aliphatic Hydrocarbons.]  Fette u. Seifen, vol. 48, 1941, pp. 397-403; Chem. Abs., vol. 37, 1943, p. 2918.

        Fischer-Tropsch slack wax was oxidized in an apparatus at a constant temperature (±1°) and with a uniform current of air.  In various experiments 600 l. of air per hr. was blown through 6,000 gm. of slack wax for 1-9 hr. in the presence of 30 gm. Mn stearate as catalyst and at temperatures of 100°-160°.  At different stages of oxidation (when the acid numbers were 20, 40, 60, 80, etc.), 40-gm. portions were removed and analyzed for unsaponifiable, fatty acids, OH acids, and nonvolatile soluble acids.  From these data and from yields of nonvolatile oxidate obtained in blank runs, interpolation formulas were derived that could be used to calculate the course of oxidation for practical purposes and especially to determine the most favorable stage of oxidation.