Abstract
To determine the value of pentosan in pulp or wood, the treatment with mineral acid (usually HCl solution) may be carried out in the given conditions, especially as to the velocity of distillation. The apparatus, as shown in the figure, consists of an automatic HCl feeder, a dropping funnel, a connection tube, a distilling flask and a water-cooled condenser. By using this apparatus,
1) It is no longer required to add HCl by hand daring the HCl treatment.
2) Because the head of HCl solution in the dropping funnel is constant, dropping velociety of HCl into the distilling flask is also kept constant.
3) Subsequently, this makes it easy to maintain the constant distillation velocity in the given conditions.
