MABERY. — SULPHUR PETROLEUMS. 2o 



(Warren). The weij^hts collected evidently afford no information 

 concerning the proportions in which these hydrocarbons are contained 

 iu the crude oil. Other results show that they are present iu smaller 

 quantities than iu Pennsylvania oil. 



At higlier temperatures to 60°, the weights of the distillates were 

 very small and irregular, which indicated the absence of definite com- 

 pounds. Between 60° and 62°, 150 grams collected at the end of the 

 fifteenth distillation, and this was still further reduced to 50 grams be- 

 tween 60° and 61°, with a vapor density corresponding to that of 

 hexane; found, 2.94; required for hexane, 2.'J8; boiling point of 

 isohexane, 61°. 27 (Warren). After the fourteenth distillation, with 

 the barometer at 749 mm., between 67° and ()S°, 75 grams collected 

 that distilled tolerably constant within this limit. A vapor density 

 determination gave 3.00 ; required for normal hexane, 2.98 ; boihng 

 point, 68°. 5 (Warren). 



For the separation of the less volatile hydrocarbons, the fraction 

 — 150°, obtained from the crude oil by distillation in vacuo, was sub- 

 jected to further distillation under atmospheric pressure. 41.5 kilos 

 of crude Findlay oil were distilled under a tension of 50 mm., and 

 collected in the first distillation at —100°, 100°-150°, 150°-200°, 

 200°-250°, and 250°-350°. The decomposition was comparatively 

 slight, and the fractions, especially the less volatile, were free from the 

 disagreeable pungent odors characteristic of refinery distillates. Even 

 the residue above 350° had apparently undergone very little decom- 

 position. On account of the reduced boiling points, it was not 

 expected tliat the more volatile constituents could be collected, and it 

 was subsequently found that scarcely any distillate boiling below 30° 

 was condensed. The weights of the first fractions were as follows : — 



The specific gravity of the individual fractions was determined with 

 the following results : — 



—100° 100^-150= 150^-200° 200°-250° 250°-350° Re>'iclue. 



0.7445 0.7941 u.8245 0.8455 0.907 0.9139 



The fraction — 100° contained no hydric sulphide; the higher frac- 

 tions contained it in small quantities. The percentages of sulphur in 

 the same distillates were obtained by combustion in air : — 



