Questions regarding the pH value in vacuum dechlorination
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This post was last edited by sunjl1981 on 2013-1-6 at 23:15. When performing vacuum dechlorination with slightly saline water, the pH value should be maintained between 1.3 and 1.5; it must not be lower than 1, as a pH below 1 results in poor dechlorination effects. How can this phenomenon be explained theoretically? What other effects will there be once it falls below 1 as well? # hcbbs
1. Brackish water at low pH levels causes severe corrosion to equipment. 2. An excessively low pH value requires a large amount of caustic soda to restore the pH level after dechlorination, thereby increasing costs；
When the pH is below 1, the solution exhibits hydrochloric acid properties, increasing the solubility of chlorine gas. As we all know, about 30% hydrochloric acid can dissolve about 6% chlorine, so the pH value cannot be too low. Others, as mentioned on the 2nd floor
This is physical dissolution, right? It doesn’t affect the reaction equilibrium, does it? I’m not sure; please advise, experts.