2566.     PARDUN, H., AND KUCHINKA, R.  [Influence of the Amount of Air Upon the Oxidation of Paraffin Hydrocarbons.]  Fette u. Seifen, vol. 49, 1942, pp. 441-446; Brennstoff-Chem., vol. 23, 1942, p. 208; Ind. Chemist, vol. 21, 1945, p. 447; Chem. Abs., vol. 37, 1943, p. 5697.

        To determine the optimal amount of air for oxidation of aliphatic hydrocarbons to acids in liquid phase, a Fischer-Tropsch-Gatsch substrate was oxidized at temperatures 100°-160° with 0.05-1 l. of air per gm. per hr. until an acid No. of 50 was attained.  At each temperature, the rate of oxidation rises until a limiting value is reached and then remains constant.  The applicable equation is:  1 gm. D=at-b, where D=l. of air per gm. of substrate per hr., a=0.03, b for maximum rapidity=4.3, for maximum yield of acids=4.6.  The temperature coefficient for 110°-140° is virtually constant at 2.52.  Above this temperature it falls to 0.80-1.70.