Separation of sodium formate and sodium thiosulfate
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I would like to ask the experts: our wastewater contains 10% sodium formate and 80% sodium thiosulfate, which prevents the purity of the sodium thiosulfate that is crystallized from increasing; its purity remains around 60-70% only. Is there any way to separate these two substances?
If there is no significant difference in the solubility of these two substances, it is impossible to achieve a good separation effect. Additionally, the strong water-absorbing property of sodium thiosulfate also poses a challenge for its separation from other water-soluble salts. You can try testing the solubility of these two substances in other solvents, and use the differences in solubility across different solvents to separate them, but that will increase costs significantly.