Original: This can be achieved by various methods, with 1) solution cooling, 2) addition of a second solvent to reduce the solubility of the solute (technique known as antisolvent or drown-out), 3) chemical reaction and 4) change in pH being the most common methods used in industrial practice.
Simplified: This can be achieved by various methods—solvent evaporation, cooling, chemical reaction, 'drowning' being the most common ones used in industrial practice.