I ■ 



204 



EXAMINATION OF A NAPHTHA FROM LIME-SOAP. 



position occur, it would be attended with the formation of small quantiti 



of 



bodi< boiling at lower temperatures than 



the substance sought for. 



It should be 



remarked, however, that this view has been suggested to us, not so much by any obser- 

 vations peculiar to ourselves, as by the consideration of the well-known fact that 

 paniftino and those portions of petroleum which boil at very high temperatures can be 

 broken up by repeated distillation, with formation of much lighter and more volatile 



oil 



fact 



i 



frequently been acted upon by the manufacturers of coal 



for illuminating purposes, and which, when carried out upon the large scale, is techni 

 oally known as " cracking " the paraffine or heavy oil. 



In brief, then, it appears as the result of our examination of the naphtha from lime- 

 soap that this mixture contains : 



Amyfcoe Cio H M 



Hydride of Amyl, Cio Hi 2 



C.proylene, • . C12 H12 



Hydride of CaproyI C12 H M 



Br,120le C12H6 



(Enanthylenc, C M H14 



Hydride of (Enanthyl, . . . .".-'.'. C14 Hm 



ToluoIe > . C14 H 8 



Caprylene, Cm Hj6 



Hydride of Capryl, Ci6 Hig 



Xj ' l0le ' C 16 Hio 



PeIar » 0nene ' CisHis 



Isocumole, . ^ TT 



„ , Ci8 H12 



^7 ' • C20H20 



"T 7 ^ . C22ll22 



Laurylene, . . , 



'•••.. C24 H24 



Or, arranged in homologous series : 



FORMULA. 



OBSERVED BOILING POtNT.l 



Cio II10 

 C12 H12 



C14 H14 

 Cl6 Hi6 



• • 



C 18His 153 



3l.5°-35.6° 



About 65o 



Something less than 95° 

 123.8°-125.2° 



FORMULA. 



C10H12 



C12 H14 

 C14 Hi 6 



C 16 His 



OBSERVED BOILING POINT. 



• • 



About 39° 

 68.5°-69.5° 

 97.8o 

 128°-129° 





m a fract bfof 1 T T*" "* "" *" ^^ Whether ° r *> th * trne toi1 ^ I"** may not in the one case be a trifle, 

 plte Tt T thM thC *""" *• nameS ° f wHch eQd in five * «* * i other ea S e be more nearly 



^^t^l™^T^ ta ^ to ^ to ^ end in <* These points ~ hope to eladdate 



< H there can h. no ,' 7 ^ t0 ^ dMbrenoe ia Ma S Point of almost precisely 30° C. for each addition of 



