PRODUCTS OBTAINED FROM LIGHTWOOD. 23 



TABLE 9. Fractionation of light oils obtained in distilling the black liquors. 



OILS SOLUBLE IN 9 PER CENT CAUSTIC SODA SOLUTION. 



As has been stated, the crude oils obtained from the black liquor 

 were first washed repeatedly with 9 per cent caustic soda to remove 

 phenoloid bodies and other oils soluble in soda. These were then 

 precipitated from the soda solution with acid, washed with water 

 and distilled. 



Distillate 

 Temperature (C): (percent). 



Up to 207 3 



207 to 210 2 



210 to 215 3 



215 to 220 6 



Distillation was continued up to 347. 



Another portion of these oils was distilled until the temperature 

 reached 240 C. and this distillate roughly refractionated to obtain 

 some idea of the percentage of guiacol and creosol in it. The follow- 

 ing results were obtained: 



Temperature ( C. ) : (POT cent* 



Up to 207 5 



207 to 210 5 , 



210 to 215 8 



215 to 220 9 



The results indicate about 5 per cent of guiacol and about 27 per 

 cent of guiacol and creosols. 



PRODUCTS OBTAINED FROM LIGHTWOOD. 



In Table 10 is given the percentage yield of all the recovered prod- 

 ucts on the basis of the moisture-free wood, both from the fresh and 

 from the steamed chips. 



These figures give an idea of the approximate quantities of the 

 several constituents or products which may be recovered from ordi- 

 nary lightwood when it is steamed to remove crude wood turpen- 

 tine, cooked with soda to produce pulp, and the black liquor dried 

 and distilled to produce oils and crude wood alcohol. 



