Method for the preparation of catalysts having enhanced stability, efficiency and/or activity for alkylene oxide production

摘要

A method for the preparation of a catalyst to be used for the vapor phase epoxidation of alkene comprising:
a) mixing zirconium silicate, with carrier raw materials comprising boehmite alumina AlOOH and/or gamma-alumina as a refractory solid support;
b) adding a mixture containing an acidic component and fluoride anions to the carrier raw materials with the added zirconium silicate;
c) calcining the fluorinated carrier raw materials with the added zirconium silicate at a temperature less than 1540°C to form a modified carrier comprising alpha-alumina, wherein the modified carrier comprises zirconium silicate; and
d) depositing one or more silver compounds onto the modified carrier to form a catalyst.