Sulfuric acid contact process
AssigneeBayer Aktiengesellschaft
InventorsLudwig Dorn, Gerhard Heinze, Jurgen Wokulat, Wilhelm Moller, Franz Rubsam
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Abstract
A catalyst for oxidation of SO.sub.2 to SO.sub.3, which can be used as a fluidized bed catalyst. An abrasive resistant support is formed by adding silica filler and a clay binder to a silica sol; adding hydrated magnesium oxide to the resulting mixture, to form a gellable composition; dispersing the gellable composition in a liquid to form gel spheres; calcining the spheres; and treating them with an acid to remove acid soluble components. After the acid treatment, the support is impregnated with an alkali metal vanadate solution and calcined.
Claims3
In a process of producing sulfur trioxide by contacting sulfur dioxide, oxygen and a catalyst at an elevated temperature in a fluidized bed process the improvement which comprises utilizing as the catalyst, a silica gel bonded bead form catalyst comprising a siliceous support having at least 97% by weight silica and a finite amount up to 8% by weight of V.sub.2 O.sub.5 and 3.1 to 12.4% by weight of K.sub.2 O, based on the weight of the catalyst, said catalyst having a proportion of pores with diameters from about 100 to 1500 A of at least 80% of the total pore volume present, said catalyst having an abrasion resistance of from about 0 to 3% by weight.
Dependencies are inferred from the claim text.