ANALYSIS, REFINING, AND COMPOSITION. 



47 



ANALYSIS. 



The analysis of this crude turpentine is given in figure 41. There 

 was no evidence of any heads material in this crude, except that 

 there was a slightly different odor in the first fraction, and ap- 

 parently about 57 or 58 per cent could be obtained which would con- 

 tain a very small amount of heavy oils. It was decided, therefore, to 

 attempt to separate the crude into the smallest possible quantity 

 2 per cent of heads, 55 per cent of hearts, and the rest tails. 



.EGEND 



MPE JATl 



160 165 170 175 180 185 190 195 

 O .86 .87 .88 B9 .90 91 .92 .93 

 O U68 IATO 1472 \JCI6. 1476 L478 U80 



FIG. 41. Boiling 1 point, specific 

 gravity, and index of refraction 

 curves for crude turpentine No. 5. 



160 165 170 175 180 185 190 195 

 O .86 .87 .88 -89 9O .91 .92 .93 

 O 1468 L470 U72 L474 U76 1478 1480 



FIG._ 42. Boiling point, specific 

 gravity, and index of refraction 

 curves for " heads " obtained in 

 refining of crude turpentine No. 5. 



DISTILLATION. 



The crude was run into the still at the rate of 25 gallons per hour ; 

 and the steam and water were adjusted to give as nearly as possible 

 0.5 gallon per hour of heads and 13.75 gallons per hour of hearts; 

 these adjustments were maintained within the usual limits of variation. 



PRODUCTS. 



HEADS. 



The analysis of the heads thus obtained is given in figure 42. From 

 the boiling point and index of refraction curves it is apparent that 



