Separation is generally carried out by steam distillation and purification uses extraction from ether followed by distillation or rotary evaporation to remove the volatile solvent.
Previously medical chemistry was characterized by any use of inorganic materials, but it was later refined to be more technical, like the processes of distillation.
When an entrainer is added to a binary azeotrope to form a ternary azeotrope, and the resulting mixture distilled, the method is called azeotropic distillation.
The distillation of products from wood characterized the transition from the use of natural chemical products (chemical industry) to that of fully synthetic products.
