摘要 |
Process for preparing catalytic systems consisting of: - a vanadium oxide; - a bismuth oxide; - and a carrier consisting of magnesium oxide, wherein the vanadium, expressed as V2O5, is in a quantity ranging from 2 to 35% by weight, the bismuth, expressed as Bi203, ranges from 2 to 40% by weight, the complement to 100 being the carrier, characterized in that it essentially comprises the following steps: - preparation of solutions based on derivatives of the components of the catalytic system; - mixing of the solutions prepared and optional aging; - drying of the solution obtained; - first heating, in the presence of air, of the solid obtained from the drying at a temperature ranging from room value to a temperature of between 290 and 310.degree.C, for a time ranging from 1 to 3 hours; - optional second heating, in the presence of air, of the solid for a time ranging from 0.5 to 2 hours at a con- stant temperature, ranging from 290 to 310.degree.C, reached in the first heating; - additional heating, in the presence of air, of the solid for a time ranging from 2 to 4 hours at the calcination temperature ranging from 600 to 850.degree.C; - calcination, in the presence of air, of the solid at a constant temperature, ranging from 600 to 850.degree.C, reached in the additional heating, for a time ranging from 8 to 16 hours. |
申请人 |
ENICHEM S.P.A.;ENITECNOLOGIE S.P.A. |
发明人 |
INGALLINA, PATRIZIA;PEREGO, CARLO;CARLUCCIO, LUCIANO;DEL PIERO, GASTONE;ASSANDRI, FABIO |