Adsorptivities, solid surface acidity, specific surface area, bulk density, electron microscopic observation etc. have been measured on the traces and investigated which are accompanied by the change of principal factors in manufacturing active carbon for liquid phase, activated with ZnCl₂.
As a result, concerning the important operation factors of activation time, activation temperature, amount of ZnCl₂, amount of HCl, raw material size, active carbon size etc., the optimum conditions causing a good activation state were found out, and moreover, mechanisms of ZnCl₂ and HCl adding effect, activation, and overactivation are clarified.
The correlation of each factor of solid surface acidity, specific surface area, pore distribution etc. to adsorptivity, and the significance of measuring bulk density also are brought to light.