Mixed solid-phase separation method
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This mixture contains 10% magnesium sulfate, 20% magnesium chloride, 13% potassium chloride, and 14% sodium chloride; the remaining amount is water. It is necessary to separate several of these salts from it
Which of these things are necessary? Those things can be omitted; otherwise, it will be difficult to decide
For the separation of the various inorganic salts listed by the original poster, one can generally consider: 1. Using the differences in their solubility in water for separation; 2. Using the differences in their solubility in organic solvents for separation; 3. Utilizing their chemical properties to separate the desired compounds – for example, the property that magnesium chloride can form complexes with alcohols, or the fact that sulfate ions can form precipitates with barium ions, which can be used for separation
There needs to be a large quantity; otherwise it’s not useful. These salts don’t seem to be easy to separate.