It is distillation at reduced pressure. Used for compounds having higher boiling points or which might undergo decomposition on heating. Vacuum is provided by water aspirator or by mechanical pump. Separation of components depends on relative volatility of components.
Related Journals of Vacuum Distillation
Journal of Industrial Pollution Control, Oceanography: Open Access, American Industrial Hygiene Association Journal,Environmental Research, Bulletin of Environmental Contamination and Toxicology,Journal of Environmental Engineering-asce, International Journal of Hydrogen Energy, industrial & Engineering Chemistry Research, International Journal of Engine Research, Fuel and Energy Abstracts.