How to remove copper ions from sulfuric acid
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70% sulfuric acid solution, with a copper ion concentration of no more than 50 mg/L. May I ask what methods Haiyou has to reduce the copper ion concentration to below 5 mg/L? :lol
I’m not sure if extraction is possible; I’ll look up some information on this topic
Could I get in touch with manufacturers that specialize in membrane filtration? (Industrial applications of membrane filtration for the concentration of spent acid to remove calcium and magnesium ions; it is unknown whether copper ions can also be removed.) It’s just that this approach requires a large investment, and there seem to be some issues with continuous operation of the reverse washing process
Silicon carbide ceramic membrane (to remove large particle impurities) + dilution with tap water to reduce the acid concentration to around 40%) + diffusion dialysis membrane (to remove copper ions) + evaporation (to restore the acid concentration to 70%)