18 PRODUCTS FROM WASTE RESINOUS WOODS. 



TABLE 4. Distillation data showing approximate composition of oils. 



The quantities of the several constituents separated from the crude 

 oils which were obtained by distilling the black liquor show some 

 rather decided variations when calculated on the basis of the dry 

 liquor. Thus the phenoloid bodies vary from 16.9 to 23.1 per cent, 

 light oils from 11 to 15.9 per cent, retene from 2.7 to 11.2 per cent, and 

 rosin oils from 58.8 to 63.9 per cent. The cause of these variations is 

 not definitely known, but it is believed that it lies in variations in the 

 speed of distillation, variations in atmospheric pressure on different 

 days, and in unavoidable errors of measurement, errors accentuated 

 by the comparatively small volumes of products obtained. 



From these data the approximate percentage of each of the con- 

 stituents of the crude oil obtained from this particular lot of wood 

 may be thus stated : 



Phenoloids 



Light or rosin spirits 



Retene 



Heavy or rosin oils containing an unknown quantity of retene. . . 



Per cent. 

 18 

 14 

 5 

 61 



There is no question as to the profitable utilization of at least two 

 of these the light oils or rosin spirits and the heavy or rosin oils. 

 Both of these products find a ready market, the former as a paint and 

 varnish vehicle and the latter in the preparation of printers' inks 

 and greases of various lands. For the latter purpose it would appear 

 unnecessary to separate the retene, as it- is quite unctuous and would 

 assist in giving body to the grease. Wood creosote may be separated 

 from the phenoloids or alkali soluble oils which also serve in the 

 preparation of antiseptic solutions or washes. 



When the several constituents are figured on the basis of the dry 

 wood, it is found that by this procedure outlined the wood yielded 

 approximately the following results: 



Phenoloids 



Light oils (below 250 C.).. 

 Heavy oils (above 250 C.). 

 Retene... 



Per cent. 



3 



2 



10 



0.6 



