High-density and mean-porosity catalyst supported on a siliceous matrix, based on vanadium, iron, oxygen and alkali metal
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United States of America Patent
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Apr 28, 1992
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app pub date -
Oct 1, 1990
filing date -
Jan 18, 1988
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Abstract
A high-density and mean-porosity catalyst, supported on a siliceous matrix, based on vanadium, iron, oxygen and alkali metals, wherein the V.sub.2 O.sub.5 content ranges from 6 to 9% by weight, the Me.sub.2 O content ranges from 8.5 to 12% by weight (Me being an alkali metal), the particle density ranges from 1.10 to 1.40 g/cm.sup.3 and furthermore: the pore volume ranges from 0.20 to 0.70 cm.sup.3 /g and the surface area ranges from 0.30 to 5 m.sup.2 /g, the average radius of the pores ranging from 600 to 2200 nanometers; the SiO.sub.2 content is lower than 75% by weight and the Fe.sub.2 O.sub.3 content is higher than 0.90% by weight.
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