| 摘要 |
<p>Gaseous mixtures of chlorine dioxide chlorine and steam are treated to provide an aqueous solution of chlorine dioxide having a low concentration of dissolved chlorine. This is achieved by countercurrently contacting the gaseous mixture with an aqueous solution of chlorine dioxide and chlorine to dissolve chlorine dioxide from the gas phase and to discharge chlorine from the gaseous phase. The steam is condensed and heats the aqueous solution. The resulting aqueous solution of chlorine dioxide and chlorine is subjected to countercurrent stripping with air or other inert gas at a temperature higher than the first countercurrent contact to remove chlorine dioxide and chlorine therefrom, the resulting chlorine dioxide solution being recovered. The gaseous mixture of air, chlorine dioxide and chlorine is subjected to countercurrent contact with water along with the gas mixture of chlorine dioxide and chlorine resulting from the first countercurrent contact.</p> |
