EFFECT OF THE PARAMETERS OF METHYLENE-CHLORIDE CARBONIZATION ON SILICA-GEL SURFACE ON THE PROPERTIES OF AN ADSORBENT (CARBOSIL)

The properties of carbon-silica adsorbents (carbosils) prepared under dynamic conditions, using special apparatus, were investigated. On the surface of silica gel methylene chloride was thermally decomposed. The influence of such factors as pyrolysis temperature, amount of CH//2Cl//2 used, its concentration in carrier gas and flow rate of carrier gas on the properties of carbosils has been studied. Adsorbents were characterized by heats and isotherms of adsorption of n-hexane, benzene and chloroform, differential distribution of adsorption energy of n-hexane and specific surface area. Studies of the effect of the amount of carbon deposited on the silica surface area were carried out.