THE COLLOID-CHEMISTRY OF SOAPS 117 



There have been many studies made of this question, but for 

 the most part they refer to the salting-out of mixed soaps as 

 obtained from different mixed fats. Under such circumstances 

 we are obviously dealing with the salting-out of a series of soaps. 1 

 We have been able to find only a single statement covering the 

 salting-out of different pure soaps by a single salt. C. STIEPEL - 

 examined the behavior of the sodium soaps of caproic, heptylic, 

 caprylic, pelargonic, capric, lauric, myristic, palmitic and stearic 

 acids towards solutions of common salt. While sodium caproate 



SALTING OUT OF SOAPS 

 OF THE ACETIC SERIES 

 BY SODIUM CHLORIO 



NO SCPARATlCN 



LAURATE C, 



C APR ATE C, ( 



CAPRYLATE-C e 



ZM 3M 4M 5M 6M- SAT 



FIGURE 75. 



was not salted out by a saturated solution of sodium clil<>n<l. 

 and the succeeding four soaps remained gelatinous, the laurate, 

 myristate, palmitate and stearate proved " insoluble " successively 

 in 17.7 percent (3.02 molar), 9.03 percent (1.54 molar), 6.94 

 percent (1.19 molar) and 4.92 percent (0.84 molar) solutions of 

 sodium chlorid. 



These values have been verified by R. J. KRONACHER, 3 win-- 

 findings for a series of sodium salts are reproduce 1 in I iu 75, 



1 See for example, J. LEIMDURTBR: Technologic der Seife, 1, 11 I >t< <! n 

 (1911). 



* C. STIEREL: Weyl's Ein*ebchriften B. chem. Tech., 1, 348, Leiptig (1911). 

 ' R. J. KRONACHER: Personal communication (1920). 



