Can waste alkali containing sodium carbonate be used to electrolyze sodium hydroxide solution?
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Can waste alkali containing sodium carbonate be used to electrolyze sodium hydroxide solution? Whether carbon dioxide is produced during electrolysis.
Yes, no carbon dioxide is produced. Because the cathode is alkaline, carbonate will not be reduced at the cathode because its oxidizing property is weaker than that of hydroxide. Even if a reaction occurs, carbon monoxide will be produced. Because it carries two units of negative charge, the ion membrane blocks it more strongly and the amount of migration toward the anode is smaller. Just thinking about it theoretically, not actually trying it. This post was last edited by Lonely Rufeng on 2008-11-23 15:44 ]
It's not worth using it for 2 electrolysis. In electrolysis, should you use it as anolyte or catholyte? If it is an anolyte, a large amount of acid needs to be neutralized before entering the ion membrane, otherwise a large number of side reactions will occur, mainly chlorine containing oxygen. If it is a cathode, the product quality will be destroyed and chlorate will be produced.
It can be used as a refining agent for the primary brine process.
It is better to use primary salt water as a refining preparation, which can remove both magnesium and calcium.