EXAMINATION OF A NAPHTHA FROM L1M«. vP. ]<» 



-) 



during the acid treatment a quantity of a difficultly volatile compound, which, at a 

 temperature between 150VLG0 , becomes black and undergoes decomposition, while 

 much sulphurous acid is given off 



The first portion of distillate from the above, having b en washed with an alkaline 

 solution to remove sulphurous acid gas, was analyzed, with the following result : 0.109 



grm. of the hydro-carbon gave 0.2226 grm. water, and 0.G403 grm. carbonic acid 

 Or, 



Found. 



Carbon 87.74 

 Hydrogen 12.41 



100.15 



These numbers correspond with the improbable formulae C 16 TT 13S8 . We entertain, 

 however, little doubt that the substance analyzed is really a mixture of xylole (C I6 

 H 10 ), the boiling point of which is at 140°, and of a hydro-carbon, of the C II 

 series, boiling at 155°, or thereabouts, which will be described directly. 



An attempt was made to separate a purer sample of xylole by repeatedly redistilling 

 the heap and collecting apart the portion more volatile than 140°, this being subse- 

 quently reworked, together with the small fractions which had previously been left 

 between 130° and 140°. By this means a small heap was finally obtained, the summit 

 of which was 135°-136°. This heap was treated with diluted sulphuric acid, the first 

 portion of which blackened much, the second portion to a less extent, the third still 

 less, and the fourth but little. After washing, drying, and distilling with sodium, in the 

 usual way, a portion was analyzed with the following result: 0.181 grm. of the hydro- 

 carbon, purified with dilute acid, gave 0.1905 grm. water, and 0.5858 grm. carbonic 



acid. Or 



Found. 



Carbon 88.29 

 Hydrogen 11.71 



100.00 



This result corresponds with the formula C 16 II12.74; the body Ft ill containing for 

 more hydrogen than pure xylole. But as this subsidiary heap is probably contaminated 

 with hydride of capryl (boiling at 128°), we have made no further attempt to purify 

 it by treatment with acids. 



. Pehrgoncne ss C 18 H 18 . About 148°-150° was a rather large heap, amounting to some 

 500 c. c. This retained a little of the offensive odor of the crude lime-soap naphtha, 



