抄録
The authors submit in this article a report of their recent experiment on the degradation of cellulose in the process of dry carbonization with hydrogen chloride. The experiment was made with the use of a standard quality of cotton cloth. All the treating conditions which are considered to influence the effects of treatment were combined for examination in the course of the experiment.
We have found that each of the simple factors (the temperature for treatment, the length of time for treatment and the absolute quantity of gas) and two interactions are significant to the effects of treatment in carbonization. We have also found that there is a necessary minimum degree of temperature, and that carbonizing gives good results if there is an ample absolute quantity of gas, even if the length of time for treatment is short.
There is a curve correlatfon between the degree of change of color and the degree of degradation, but it would be wrong to judge the degree of degradation by the change of color in the carbonizing process, because it will not do to apply this correlation in practice.
When wet rags are treated at a high temperature, degradation is very effective. We think the mechanisms of degradation of cellolose in wet and dry carbonizations are similar, and that there is little difference in the effect of carbonizing treatment between wet and dry.
