Silylation of charcoal to increase its hydrophobicity

摘要

When charcoal is used as an adsorbent, its effective lifetime is decreased by the adsorption of water vapor. A process is described whereby the charcoal is treated with an effective amount of a non-chlorinated organo-silane to increase the hydrophobicity of the charcoal. The reduction in surface area and organic adsorption capacity, which occurs upon silylation, is relatively small whereas there is a somewhat greater reduction in water adsorption capacity of the silylated charcoal.