210 EXAMINATION OF NAPHTHA FROM RANGOON PETROLEUM, 



From these analyses the following formulae are derived: 



I. («) = ('i l n ni;2 ; (£) — C n Hum- IX C 16 Hm.^. III. C 16 H 15-78 . IV. (a)= C 18 H 18 . 23 ; 

 C 18 n iMl . V. Cm H 179 . VI. C 18 H 1786 . VII. C 18 II 1754 . VIII. C 18 H 1759 . 



It will be observed that the fractions Nos. I. and II. are largely composed of by- 

 chides, — doubtless those of oenanthyl and of capryl, which boil at 98°, 120°, and 128°, 



though still contaminated with hydro-carbons belonging to one or both of the 

 C n I I n series, or possibly even with toluole. Fraction No. III. is probably a mixture 

 of xylole, the foregoing hydrides, and members of the C n H n series, as before. The 

 composition of fraction No. IV. indicates the probable presence of hydride of pelargo- 

 nyl, boiling at 150°. Fractions Nos. V., VI, VII, and VIII. are probably composed for 

 the most part of pelargonene (C 18 H 18 ) contaminated with a little isocumole (C 18 H 12 ). 



The comparatively small proportion of hydrogen found in the fractions Avhich boil 

 in the vicinity of 140° and 170° (the boiling points of xylole and isocumole), goes to 

 corroborate the opinion of De La Rue and Miiller, 1 that Rangoon petroleum contains 

 members of the benzole series, and is perhaps all the more pertinent in view of the fact 

 that we have ourselves isolated naphthalin from the petroleum, as has been already 

 stated. It is of course conceivable that the naphthalin alone may have contaminated 

 the fractions in question, as well as the definite heaps which have been previously de- 

 scribe.], the analysis of all of which indicate the presence of a little less hydrogen than 

 is contained in pure C n H n . But this conception seems to us improbable; the compo- 

 sition of fractions 142.3°-144.3° (No. III.) and 151.6°-153.7° (No. IV.) 



Jar to invalidate it. We may here say that on the whole our results have very 

 much weakened the opinion, which at one time seemed to us to b 

 probable, that the benzole-homologues obtained by De La Rue and Miiller might h 





par 



app 



orether lm 



resulted from the action of nitric acid in removing hydrogen from the more highly hy 



drogemzed hydro-carbons, and might not have been contained in the native petroleum 



As the result of our examination thus far, it appears that the naphtha from Rangoor 



petroleum contains : 



Rutylene - C20 H20 boiling at about . . . . 1750 



Margarylene — C22 II22 " " " 



Laurylene = C24 1 124 « « " 



Cocinylene = C26 II24 " " « 



Naphthalin = C20 lis. 



195° 



215 



-.0 



235 



r;o 



Also, probably, Pelargone = C 18 H 18 , boiling at about 155% and members of on 

 both of the series of hydrides ; it being a fair presumption that we have had ir 

 hands the Hydrides of (Enanthyl, of Capryl, and of Pelargonyl. Our experiments 

 indicate the probable presence of Xylole and Isocumole. 



Boston, J une 1865 ' rr ° CeC<linkrS "** Royd S ° cicty ° f L ° ndon> Vffl ' 225< ' 



