Filter the mixture
You can filter it or evaporate and condense the water
Add some amount of copper sulphate(CuSO4) in the mixture. the water molecules get attracted to CuSO4 molecules and it will turn into blue colour(CuSO4.5H2O) The oil will be in normal colour so you...
use a centrifuge or boiling points perhaps
Evaporate off the water leaving the dry salt crystals behind.
Evaporate the water
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