A procedure for extracting sulfur dioxide from a residual gas containing sulfur dioxide and oxygen. (Machine-translation by Google Translate, not legally binding)

摘要

A procedure for extracting sulfur dioxide from a waste gas containing sulfur dioxide and oxygen, comprising: (a) passing said waste gas in contact with a catalyst for the extraction of SO2 from the gases, thereby separating the SO2 from the waste gas and a relatively SO2-free waste gas stream is obtained; (b) then contacting the catalyst with a reducing gas, whereby said catalyst is regenerated, and a discharge gas stream containing SO2 is obtained; (c) oxidizing any residual amount of hydrogen, carbon monoxide or hydrocarbons present, under conditions such that substantially no oxidation of SO2 to SO3 occurs; (d) removing substantially all of the moisture present in the oxidized discharge gas stream; (e) oxidizing the SO2 content of this gas to SO3; and (f) absorb SO3 in concentrated sulfuric acid. (Machine-translation by Google Translate, not legally binding)