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AssigneeEbara Manufacturing Co., Ltd.
InventorsMasao Taniguchi, Sueo Machi, Waichiro Kawakami, Shoji Hashimoto, Keita Kawamura, Shingi Aoki
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Effluent gas containing SO.sub.2 and/or nitrogen oxides of various forms (referred to as NO.sub.x) are irradiated with an ionizing radiation to form aerosol. The aerosol is collected by a collecting means to form a collected material containing sulfur dioxide and nitrogen oxides. Effective components are recovered from the collected material by subjecting it either to steam-roasting with or without addition of ore of low grade, solid waste generated from smelting processes, copper-containing pyrite cinders or an alkali earth metal compound to the collected material, or to thermal decomposition.
A process for recovering effective components from effluent gas containing sulfur dioxide and nitrogen oxides, which comprises irradiating the effluent gas with an ionizing radiation to form an aerosol, and then collecting the aerosol by a collecting means, and decomposing the resulting collected material, characterized by forming paste of the collected material, and subjecting the paste to steam-roasting to form a vapor of a mixed acid of sulfuric acid and nitric acid, and condensing the vapor by water to form a liquid of the mixed acid.
Dependencies are inferred from the claim text.