Distillation is the act of boiling and condensing a mixture of liquids with different boiling points in order to separate the mixture's individual components. For most processes the mixture is boiled and the gas let off is condensed then boiled again. This is called multi-stage distillation, and is the concept behind distillation columns.
- Wile, Dr. Jay L. Exploring Creation With Physical Science. Apologia Educational Ministries, Inc. 1999, 2000