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Return to Abstracts of Literature 1500-1749
1585. IVANOFF, N. [Esterification of Fatty Acids With Glycerol.] Bull. Mat. Grasses Inst. Colonial Marseille, vol. 29, Nos. 1-2, 13-19, 1945; Chim. et Ind., vol. 53, No. 1, 1945, p. 41; Chem. and Met. Eng., vol. 53, No. 3, 1946, p. 270.
Work done on the rate of esterification of fatty acids with glycerol showed what quantities of catalyst and glycerol should be used, as well as the most favorable temperatures in regard to rate of reaction and preparation of undecomposed products. It was found that the catalytic action of benzene-sulfonic acid and p-toluenesulfonic acid is practically the same. At 175°-185° and in presence of 0.22% catalyst, the reaction is virtually in equilibrium after 8 hr. of heating, the yield being 82%. With 0.5% catalyst, the yield is still 82%, and the reaction stops after 5 hr. of heating. When the temperature is raised to 250°-260°, the reaction is rapid and the yield is 96-97%, but the product is partly carbonized at the end of 3 hr. The rate of esterification and the yield of esterifeid fatty acids increases very rapidly when the quantities of glycerol used are greater than those indicate in the theoretical formula for triglycerides, but then there is a distinct predominance of diglycerides. p-toluenesulfonic acid was found to be more advantageous than benezenesulfonic acid.