PROCESS FOR PREPARING A HIGH-DENSITY AND MIDDLE-POROSITY CATALYST, SUPPORTED ON A SILICEOUS MATRIX, BASED ON VANADIUM

摘要

A process for preparing a high-density and middle-po-rosity catalyst, supported on a siliceous matrix, based on vanadium, oxygen and alkali metals, wherein the V2O5 content ranges from 6 to 9% by weight, the K2O content ranges from 8.5 to 12% by weight and the particle density ranges from 0.90 to 1.40 g/cm3 and wherein furthermore: - the volume of the pores is from 0.30 to 0.70 cm3/g and the surface area is from 0.30 to 3 m2/g, the average radius of the pores being from 650 to 2200 nanometers; - the SiO2 content is equal to or lower than 75% by weight and the Fe2O3 content is equal to or higher than 0.90% by weight.