Production of sulfuric acid using a K.sub.2 SO.sub.4, V.sub.2 O.sub.5, diatomaceous earth catalyst
AssigneeNippon Shokubai Kagaku Kogyo Co., Ltd.
InventorsHaruichi Hara, Toshihide Kanzaki, Hisanao Motomuro, Akiyoshi Adachi
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Abstract
A process for the production of sulfuric acid for using a gas containing sulfur dioxide in a high concentration which comprises using a catalyst consisting of vanadium pentoxide as a main catalytic component, potassium sulfate as a promotor and a diatomaceous earth carrier, wherein a ratio of K.sub.2 O(mol)/V.sub.2 O.sub.5 (mol) is 3.8 to 5.5, V.sub.2 O.sub.5 content is 5.5 to 7.5% by weight and sum of a value of said ratio and the V.sub.2 O.sub.5 content (% by weight) is 9.3 to 11.
Claims7
A process for the production of sulfuric acid comprising subjecting a gas containing 12 to 25% by volume of sulfur dioxide and more than the stoichiometric amount of molecular oxygen to gas phase catalytic oxidation reaction in the presence of a catalyst which consists of vanadium pentoxide, potassium sulfate and diatomaceous earth, wherein the ratio of K.sub.2 O(mol)/V.sub.2 O.sub.5 (mol) is 3.8 to 5.5, V.sub.2 O.sub.5 content is 5.5 to 7.5% by weight and the sum of the value of said ratio and the V.sub.2 O.sub.5 content (% by weight) is 9.3 to 11, said reaction being carried out at a temperature of at least 420.degree. C. in the catalyst layer inlet and at a temperature of at most 800.degree. C. in the catalyst layer outlet.
Dependencies are inferred from the claim text.