22 



PRODUCTS FROM WASTE RESINOUS WOODS. 



The volume of oils distilling below 335 C. is greater from mixed 

 rosin and soda than from the rosin alone, and the specific gravity of 

 these oils is lower than that of the oils produced from rosin alone, 

 which distill below 335. In other words, a greater quantity of lighter 

 oils is obtained by distilling rosin with soda than by distilling rosin 

 alone, 65 per cent of the total oils obtained distilling below 335 C. 

 from the rosin and soda, while but 37 per cent distill from the rosin 

 alone. It will be observed also that while a smaller percentage of oil 

 distilling above 335 C. is obtained from the rosin and soda, the specific 

 gravity of these oils is lower than that of the oils from rosin alone. 

 The last three fractions from the rosin alone are thick and heavy, and 

 flow with difficulty. All the fractions from the rosin and soda are 

 limpid and free flowing. Results of the same nature were obtained 

 fromcooking the wood with soda. The results of the distillation of 

 the black liquor are shown in Table 8. 



PR ACTIO NATION OP THE OILS PROM THE BLACK LIQUOR. 



The heavier oils (those heavier than water and distilling above 

 335 C.) obtained from the distillation of the black liquor were dis- 

 tilled from an ordinary side-neck distilling flask, thus roughly frac- 

 tionating them, with the following results: 



TABLE 8. Data obtained on fractionating the heavy oils distilled from the black liquor. 



From 5 to 17 per cent of the heavy oil is retene, which may be 

 partly separated by chilling and cold pressing. It was found that the 

 distillation of the dried black liquor could be duplicated quite closely. 

 Thus distillation from the same dried liquor gave 42, 41, and 43 per 

 cent distillate. 



The light oils obtained on distilling the black liquors were roughly 

 fractionated from a side-tube flask in order to obtain some idea of 

 their nature. The mixed oils from cooks 6, 7, and 8 gave the following 

 results. 



