DRY DISTILLATION METHOD USING SUPERHEATED STEAM AS HEAT SOURCE AND ITS APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a dry distillation method using superheated steam as a heat source which can prepare dry distilled acetic acid liquid and carbides of uniform quality rapidly with a high yield without experiences and skills and which can prepare carbides having activated carbon properties subsequent to preparation of carbides. SOLUTION: A dry distillation method of preparing dry distilled acetic acid liquid by dry distilling a raw material 17 comprising wood or bamboo comprises the first step of placing the raw material 17 in an air-permeable container 18 and housing the container 18 in a dry distillation kettle and sealing the same and the second step of introducing superheated steam into the dry distillation kettle while the pressure in the dry distillation kettle is kept positive and dry distilling the raw material 17 at a temperature in the thermal decomposition temperature range to prepare dry distilled acetic acid liquid.