Abstract
AbstractThe formation of acid soaps has been used successfully for the separation of a mixture of fatty acids into high and low iodine value fractions. The acid soaps of saturated acid can be made to crystallize from water leaving their unsaturated counter parts in solution. Acid soaps of saturated fatty acids are well characterized compounds with the formula R‐COOM.R‐COOH, where R is a straight alkyl chain, and M is sodium, potassium or ammonium.Optimum crystallization conditions involve a soap concentration of 2舑5%, pH adjustment to between 7.0 and 8.0, an initial crystallization temperature not below 25C, and a crystallization period of at least 4 hr during which time cooling to a final temperature of 5舑10C must be gradual, and agitation gentle.
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