Catalyst for oxidation of sulfur dioxide

Details Catalyst for oxidation of sulfur dioxide Catalyst for oxidation of sulfur dioxide

B - Operations, Transporting

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B01J 23/22 (2006.01) B01J 27/055 (2006.01) C01B 17/79 (2006.01)

Patent

CA 1127620

Abstract of the Disclosure A catalytic material for oxidation of sulf.. iioxide to sulfur trioxide at any temperature above 300°C, com- prising a catalyst which at reaction conditions is a melt including sulfatized vanadium ions as the active catalytic component and two different promoters and which is dispersed in an inert porous carrier. The first promoter comprises cesium ions, optionally in combination with ions of another alkali metal such as so- dium, potassium or rubidium, know to promote vanadium catalysts. The second promoter comprises ions of a metal such as aluminum, magnesium, yttrium or lanthanum, which does not promote formation of inactive V4 species and the oxide of which has a heat of formation greater than 100 kcal per oxygen atom and is at lest partly soluble in the heavily sulfatized environment of the melt.

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