Young — Note on Azeotropic Mixtures. 



29 



the mixture by distillation, whereas toluene could easily be separated from 

 a strong solution. The case is doubtless similar to that of a mixture of 

 acetic acid and water, from which it is practically impossible to separate 

 pure water, but easy — from strong solutions — to separate pui-e acetic acid 

 by distillation. 



180^ 



l6o 



140 



120 



100 



80 



-Qctijl 

 Alcohol 





- Tso-Amyl 



— n-ButyL 



- Tso-3ulyl 



TertAmyl 

 ■ SecButul 

 - n-Vropyi 





K 



A' 





(5)- 



9' 





70 



80 



90 

 Fio. 3. 



100 



(10 





The upper limit of the curve, where it intersects the vertical toluene 

 boiling-point line, is at about 132°, or just about the boiling point of 

 symmetrical isoamyl alcohol (7). According to Lecat, this alcohol does form 

 a mixture of minimum boiling point with toluene, but the boiling point of 

 the azeotropic mixture is only Ol degree lower than that of toluene. 



R.I.A. PROC, VOL XXXVI, SECT. B. . L^J 



