274 The Philippine Journal of Science 1923 



Table 3. — Analysis of unsaturated acids. 



Sample of unsaturated acids (grams) 2.1368 



Linolenic hexabromide insoluble in ether 



Linolic tetrabromide insoluble in petroleum ether 



Residue (grams) 3.3540 



Bromine content of residue (determined) (per cent) 36.03 



Oleic acid equivalent to dibromide (grams) 2.1400 



Impure oleic glyceride in oil (per cent) 59.78 

 Oleic glyceride corrected for unsaponifiable matter (per 



cent) 59.59 

 SATURATED ACIDS 



The impure saturated acids were converted into their methyl 

 esters by dissolving the acids in methyl alcohol and saturating 

 the solution with dry hydrogen chloride, which was prepared 

 by treating fused ammonium chloride with sulphuric acid and 

 passing the gas through sulphuric acid. The mixture was then 

 heated on a water bath (reflux) for fifteen hours, after which 

 it was treated with water and the ester layer separated. The 

 esters were dissolved in ether and the ethereal solution washed 

 with sodium carbonate solution and afterwards with water. 

 The ethereal solution was then dehydrated with anhydrous 

 sodium sulphate, filtered, and the ether removed by distilling. 

 The impure esters (43.8832 grams), which were yellow, were 

 distilled under diminished pressure. A preliminary distillation 

 at about 15 millimeters pressure was made, to obtain the pure 

 colorless esters and eliminate the dark impurities which were 

 formed as by-products in the esterification process. The colorless 

 esters (39.5476 grams) were then redistilled at 15 millimeters 

 pressure. Data on the distillation of the esters are given in 

 Table 4. 



ters of the saturated acids; 



) 210°C 43.8832 



Distillate 39.5476 



Residue 4.3356 



Second distillation: Esters distilled 39.5476 



Fraction. 



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