Catalysts containing Bronsted acid sites are active for hydration of 1-butene. The rate determining step is the surface reaction between 1-butene adsorbed in very small amounts and water adsorbed in larger amounts on hydrated protons which are presumably the active sites. Product 2-butanol exerts a competitive inhibition which can be suppressed by water. Zeolites containing late transition metal ions were found to catalyze the hydration of acetylene. This transformation is also kinetically controlled by the rate of the surface reaction between weakly adsorbed acetylene and rather strongly adsorbed water. Acetaldehyde bound to the active sites poisons the reaction reversibly. Its crotonic condensation which would result in a permanent poisoning can be avoided by the elimination of the acidic OH-groups generated by the electrostatic field of bivalent cations.
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry