In chemical engineering, a cascade is a plant consisting of several similar stages with each processing the output from the previous stage. Cascades are most commonly used in isotope separation, distillation and other separation or purification processes. For instance, if a still removes 99% of impurities from water (leaving .01 the original amount of impurities), a cascade of three stills will leave .01³ = .000001 = .0001% the amount of impurities (99.9999% removed). Chemical engineering is the application of science, mathematics and economics to the process of converting raw materials or chemicals into more useful or valuable forms. ... Isotope separation is the process of concentrating specific isotopes of a chemical element by removing other isotopes. ... Jump to: navigation, search Strathisla whisky distillery in Keith, Scotland Distillation is a means of separating liquids through differences in their vapor pressures. ... In chemistry and chemical engineering, a separation process is a process that transforms a mixture of substances into two or more compositionally-distinct products. ... Categories: Move to Wiktionary | Stub | Chemistry ... A still is an apparatus used to distill miscible or immiscible (eg. ...