How do you obtain pure dry sodium nitrate crystals from caliche?

Answer 1

To obtain pure dry sodium nitrate crystals from caliche, the caliche ore is first crushed and then dissolved in water, allowing the soluble sodium nitrate to go into solution. After filtration to remove insoluble impurities, the solution is concentrated through evaporation. Finally, the concentrated solution is cooled or seeded to promote crystallization, allowing pure sodium nitrate crystals to form, which can then be collected by filtration and dried.