For certain products, this technique can be improved by using a spinning band of an inert material like Teflon.
This laboratory technique may use Raschig rings to increase the surface area without sacrificing too much space. For certain products, this technique can be improved by using a spinning band of an inert material like Teflon. A solution of 96% ethanol and 4% water cannot be normally separated by this technique, because it deviates from Raoult's law as an azeotrope. One variant of this is used to refine petroleum. For 10 points, name this lab technique that separates two components of a solution based on boiling point, which comes in a "fractional" version.
This laboratory technique may use Raschig rings to increase the surface area without sacrificing too much space.
distillation [accept fractional distillation or extractive distillation; prompt on boiling]