| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To develop a method for obtaining a dried gas (A) without generating much sulfuric acid mist by bringing an aqueous wet gas (B) into contact with concentrated sulfuric acid (C). <P>SOLUTION: This producing method is to make the wet gas (B) into contact with the concentrated sulfuric acid (C) of a sulfur dioxide concentration of 30 ppm or lower and dry the wet gas. Preferably, the wet gas (B) contains chlorine. A drying column (5) is used, the wet gas (B) is fed from the column bottom (51) and is made to flow from the column bottom (51) toward the column top (52) in the drying column (5), and also the concentrated sulfuric acid (C) is fed from the column top (52) to be made to flow toward the column bottom (51) and to contact with the wet gas in the inside of the drying column (5). <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
