. The distillation of stumpwood and logging waste of western yellow pine. Ponderosa pine; Wood distillation; Wood waste. DISTILLATION OF STUMPWOOD. 25 the light oil between 260° and 330° C, and the heavy oil above 330° C. A strong evolution of wood gas, which burns with a bright luminous flame, takes place while the heavy oil comes over. Char- coal and pitch are the end products of the distillation. The pitch is drawn off through a plug cock in the bottom of the retort at the end of a run. There is no sharp line of demarcation between the stages in which the distillation is conducted, because
. The distillation of stumpwood and logging waste of western yellow pine. Ponderosa pine; Wood distillation; Wood waste. DISTILLATION OF STUMPWOOD. 25 the light oil between 260° and 330° C, and the heavy oil above 330° C. A strong evolution of wood gas, which burns with a bright luminous flame, takes place while the heavy oil comes over. Char- coal and pitch are the end products of the distillation. The pitch is drawn off through a plug cock in the bottom of the retort at the end of a run. There is no sharp line of demarcation between the stages in which the distillation is conducted, because decomposition of the wood takes place long before all the turpentine has distilled over, and to effect a maximum recovery of it this stage of the distillation. Fig. 4.—Elevation of retort. a, Retort shell. 6 and c, Main heating coils. d, Bottom heating coil. e, Oil heater. f, Oil circulating pump. g, Overflow tank. h, Worm condenser. j, Trapped vent pipe. Tc, Oil tank. I, Overflow catch. m, n, o, Valves. 1, 2, 3, 4, Thermometers must be continued to the point at which the wood is converted into a brown friable substance approaching charcoal in its nature. This decomposition sets in when most of the hygroscopically held moisture has been expelled from the wood (about 260° C.), and is made appar- ent by the sharp odor of the distillate and development of a reddish color in the hitherto colorless aqueous layer. This incipient decom- position is soon attended by a perceptibly acid taste of the distillate, turbidity of the turpentine layer, and the escape of noncondensable gases (mostly carbon dioxid) from the vent pipe (j). This point in. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Donk, M. G. (Marion Gilbert), 1876-1939; Shattuck, Charles Houston, 1867-1931; Marshall, W. D. , 1891-. Washington, D. C.
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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherwashi, bookyear1921
