Boiling is the fast evaporation of a water, which happens when a liquid is boiled to its boiling point, the temperature at which the condensation pressure of the liquid is equal to the force used on the liquid by the nearby environment. Boil or steam the water and the salt will be left after as a solid. If you want to get the water, you can use distillation. This works because salt has a much greater boiling point than water.
