



212 EXAMINATION OF NAPHTHA FROM RANGOON PETROLEUM. 



On analysis, the following results were obtained ; No. I. refers to the fraction which 

 boiled at 208.3° (corrected) ; No. II. to that boiling at 214.6° ; and No. III. to that boil- 

 ing at 219.6°. 0.1845 grm. of No. I. gave 0.2121 grm. water, and 0.5885 grm. carbonic 

 acid (a) ; a second sample of 0.1326 grm. of No. I. gave 0.1525 grm. water, and 0.4235 

 grm. carbonic acid (b.) ; 0.1387 grm. of No. II. gave 0,1654 grm. water, and 0.443 grm. 

 carbonic acid (a) ; a second sample, of 0.1433 grm., of No. II. gave 0.1728 grm. water, 

 and 0.4552 grm. carbonic acid (b) ; while 0.194 grm. of No. III. gave 0.2407 grm. 



water, and 0.6106 grm. carbonic acid. Or, 



Found. Theory. 





I- s II. III. (C24 H24) 



a. b. a. b. 



Carbon, 86.99 87.10 87.09 86.60 85.83 85.7 



Hydrogen, 12.79 12.82 13.27 13.40 13.87 14.3 



99.78 99.92 100.36 100.00 99.70 100.0 



These figures accord with the formulae I. (a) C 24 H 21 . 19 , (b) C 2i H 2120 : — II. (a) C u 

 •*I 2 io5, W C24 ir 2229 : — III. C 24 H^g; and point clearly to the presence of some 

 substance less highly hydrogenized than laurylene. In a subsequent paragraph 

 it will be shown that this disturbing element was naphthalin. That the naphthalin 

 should have given rise to the formation of three heaps is a matter of no su 



present 



unfortunately the work of two operators happened 



prise 



lap at this very point. One obtained the greater part of the naphthalin, the other most 

 of the laurylene ; while between the two a spurious heap 1 was formed. 



A determination of the vapor density of Nos. II. and III. gave the following 

 results : — 



Temperature of balance, 



" oil-bath, 

 Excess of weight of balloon, 

 Capacity " 



-Air remaining in " 



Height of barometer, . 

 Density of vapor found, , 



" « 



theoretical (C^ 11^), 



II. HL 



12.5° 13° 



25G.5 262° 



0.6247 0.6238 



228 c. c. 226.5 c. c. 



" " 



759mm. a t _ 2° 748.6mm. at 3° 



5.980 6.051 . 



5.809 5.809 



n J:«Tf C g 7 ity ° f N °- l WM f0lmd t0 be °- 86 54 at 0°; that of No. II. to be 

 0.8o48 at 0° ; and that of No. III. to be 0.8453 at 0°. 



NapMMUn^ C w H 8 . In the course of the winter it happened that the temperature 

 of he apartment an which the products from the Rangoon naphtha were kept, fell 



or i below zero, and remained at that point during several days. It was then 



1 Sec this volume, p. 200. 



