I have about 5 kilograms of battery paste I want to purify. However I don't want to use more acid than I have to due to age and weight restrictions on
oxalic acid in my home state. I figure that since there is a large amount of carbon that an oxidizer such as KNO3 could be used which I can easily
get. Then you can just wash the resulting carbonates out of the slag. This would strip a good portion of the carbon and also ensure that all the
manganese is in the +4 oxidation state. I don't think that it would oxidize to manganate due to the lack of strong bases. I would like some
suggestions on how to purify it from there or if there are any issues with the viability of my idea. |