| 摘要 |
The invention relates to a process for the preparation of vinyl acetate in the gas phase from ethylene, acetic acid and oxygen or oxygen-containing gases on a catalyst containing palladium and/or compounds thereof and, if desired, in addition gold and/or gold compounds and, as activators, alkali metal compounds and, if desired, in addition cadmium compounds on a support comprising SiO2 or an SiO2/Al2O3 mixture having a surface area of 50 - 250 m<2>/g and a pore volume of 0.4 - 1.2 ml/g and whose particles have a particle size of 4 to 9 mm, 5 to 20% of the pore volume of the support being formed by pores having radii from 200 to 3000 ANGSTROM and 50 to 90% of the pore volume being formed by pores having radii from 70 to 100 ANGSTROM . The support particles are compacted by means of an Li salt, Mg salt, Al salt, Zn salt or Mn salt of a C2-C20-carboxylic acid or a mixture of such salts as binders. |
