Process for the preparation of catalytic systems for the oxidative dehydrogenation of alkylaromatics or paraffins
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United States of America Patent
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Mar 11, 2003
Grant Date -
Feb 28, 2002
app pub date -
Jun 1, 2001
filing date -
Jun 1, 2000
priority date (Note) -
Expired
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Abstract
Process for preparing catalytic systems consisting of: a vanadium oxide; a bismuth oxide; and a carrier consisting of magnesium oxide, comprising: preparing of solutions based on derivatives of the components of the catalytic system; mixing the solutions and optional aging; drying the solution; 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; 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.
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