How I can separated aluminum sulphate from nickel sulphate solution. I am working on spent randy nickel after hydrogenation of vegetable oil ?

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Krzysztof Gargul

Maybe this way. First, you would have to precipitate both sulfate out of solution. Then you would use the property that nickel sulphate (hexahydrate or heptahydrate) is soluble in ethanol but aluminum sulfate is insoluble in ethanol.

But hexahydrate or heptahydrate is soluble.

https://www.chemicalbook.com/ChemicalProductProperty_EN_cb7498462.htm