Über die dilatometrisch indizierten Titrationen

The change of the volume caused by adsorption of a fatty acid (e.g. acetic acid, propionic acid) on activated coal is continuously controlled by means of a dilatometrical titration. According to the adsorption isothermes the formation of a mono- and then a dimolecular adsorption layer can be shown. In high concentrated fatty acid a stronger covering of the surface of the adsorbent occurs. A quantitative calculating gives also—with the help of potentiometry—informations about the specific surface area, pore volume and pore radius of the activated coal used.