EXAMINATION OF NAPHTHA FROM RANGOON PETROLEUM 



209 



liquid to admit of being poured from the can which contained it, when the temperature 

 of the air was 25° C; but, upon being heated, it flowed readily ;it 30°-33°, and 

 became perfectly fluid at 38°-40°. The color of the mass was yellowish-green. It 

 emitted the odor common to the purer varieties of native petroleum ; though its odor 

 was but slight and in no wise offensive. The 



specific gravity of this native petroleum 



was 0.875 at 29°. 



Four separate portions of the crude petroleum, each about 5600 c. c, were distilled 



copp 



retort without the 



position of any hot condenser. A f< 



drops of the liquid began to distil over at about 140°-150°, and the proce i of distill 



ed until the temperature had reached 270°-300 



The distillate obtained 



amounted, all told, to 



* 



a little more than 7000 c. c, or 30.4G% of the crude petroleum. 



The volatile product, or naphtha, thus obtained was now subjected to the process of 



distillation and fractional condensation, as described in Vol. IX., p. 130, of the Memoirs 



of this Academy. This naphtha began to pass through the hot condenser at about 125°, 



the liquid in the retort then boiling at about 105°. During a dozen or more operations 



the distillation was carried up to 260° ; afterwards, as the quantities b 



smaller, 



nly up to about 250 



The 



phtha contained only a very small quantity of easily 



volatile products, nothing having been collected, in a second cold receiver su 

 with ice, either during the preliminary distillation from the copper retort or d 



* 



first series of fractional distillations. 



Fractions of the naphtha were taken off for every ten degrees of tempe 



nded 



first, then for every five d 



single degree, 



hyfi 



P 



for ev 

 of the 



er\ 



3 degrees, and, finally, for i 

 having, of course, been don 



fractions of one degree. The greatest care was constantly exercised in order 



o 



n of the more v 

 of these matters 



prod 



It 



With the same regard 



and of the worms employed was 



as far as possible the loss by evaporati 

 ever, impossible to avoid a great waste 

 economy of liquid, the size of the gl 

 reduced to the lowest practicable limit. 



After the distillatory process had been continued until products of definite boiling 

 points had been obtained, or until, in the lack of this, the amount of liquid in each 

 fraction had been so far reduced that there was no longer any hope of isolating pure 



substances in that part of the 

 obtained seven well-defined heap 



field, a survey of the work indicated that there had been 

 } between the temperatures of 170° 2 and 250° ; but 



1 For definition of this term sec the preceding Memoir, p. 179 of this volume. 



2 \ u . * , i ,,„ „,4 k „ t i lf > Wftl .,i « corrected " refer to the indications of ordinary thermometers. 

 * All statements of temperature, when not followed by the woiu coirccitu, rew 



r* , j -u i ,•„ \t*\ TV n ui nf the Memoirs of this Academy, and corrected 



Corrected temperatures are those taken in the manner described m Vol. IX., p. l« or me *iumn " /* 



formul 



VOL. IX. 



31 



