Stannous chloride solution
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How is it best to recover tin from stannous chloride solution? ? What anode and cathode should be used in the electrodeposition method? What additives should be added and what electrolytic conditions should be controlled?
Tin is used for the positive electrode, while an inert electrode such as a carbon rod should be used for the negative electrode. As for the specific process conditions, they haven’t been tried, so I wouldn’t dare to make any claims.
It seems like the guy upstairs is even less knowledgeable than I am, but thanks anyway for your support. Let’s take a look at what the experienced experts have to say!
Direct electrowinning of stannous chloride is likely not feasible. It is recommended to consider the following two options: 1. NaOH neutralization + oxidation-precipitation (mainly SnO2), and the precipitate is used in a reduction furnace to extract tin metal. 2. HCl is recovered by low-pressure distillation of stannous chloride solution, and the residue is used in a reduction furnace to extract metallic tin. The precipitate/residue from the previous two steps can also be further treated with NaOH to produce sodium stannate, which can then be electrodeposited. In fact, the key is the separation and purification of the precipitates/residues, rather than converting them into tin metal.