| 摘要 |
<p>PURPOSE:To efficiently treat gas by allowing AsH3 and/or PH3 in the gas to be adsorbed in an acid soln. contg. a silver compd. other than silver nitrate or silver and H2O2 as an absorbing soln., oxidizing silver formed by an absorption reaction with the absorbing soln., dissolving and reutilizing the silver. CONSTITUTION:Exhaust gas contg. AsH3 and/or PH3 enters an absorption tower 3 from a dust 2 and the AsH3 and/or PH3 is absorbed in the acid soln. contg. the silver compd. other than silver nitrate or silver and H2O2 as the absorbing soln. fed from a tank 8. Silver formed by the absorption reaction is oxidized by H2O2 in the absorbing soln., dissolved and reutilized. Since NOx is not generated by the reaction, erroneous action of a gas detector is prevented.</p> |
