Liquid-liquid extraction principle of extraction tower

Use the solubility or partition coefficient of the compound in two incompatible solvents to transfer the compound from one solvent to another. After repeated extraction and transfer, most of the compounds are extracted. The distribution law is the main basis of the extraction method theory. The substances have different solubility in different solvents. In two incompatible solvents, when a certain soluble substance is added, it can be dissolved in two solvents separately. Experiments show that at a certain temperature, the compound and these two solvents will not decompose, electrolyze, During association and solvation, the ratio of this compound in the two liquid layers is a fixed value.

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