Catalytic Activity of Pigments (IV)

Effects of Alkali Metal on Acidic Sites of Pigments

Abstract

The effects of alkali metal carbonates on acidic sites of pigments for the dehydration of alcohol were studied by means of a pulse reactor method. Dehydration of alcohol decreased by the addition of alkali metal carbonate. It was correlated with the electron negativities or the ionic radius of the alkali metals.
Dehydration of isopropyl alcohol over kaolinite was first order reaction and can be analyzed by Bassett equation. As a result, strength of acidic sites seems to be Boltzmann distribution and alkali metal inactivated the acidic sites in order of their strength.