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After many cycles the desired compound is concentrated in the distillation flask.
Designer of a special distillation flask, now known as the Claisen flask.
For that reason, "boiling chips" are put in the distillation flasks used to evaporate organic solvents.
Heat is often applied to the rotating distillation flask by partially immersing it in a heated bath of water or oil.
Both batch and continuous distillations can be improved by making use of a fractionating column on top of the distillation flask.
The distillate receiver can be stored under vacuum or under inert gas by using the side-arm on the distillation flask.
Rotary evaporation set-ups include an apparatus referred to as a Rotovap which rotates the distillation flask (sometimes called the still pot) to enhance the distillation.
When the Soxhlet chamber is almost full, the chamber is automatically emptied by a siphon side arm, with the solvent running back down to the distillation flask.
Similar to the reaction flask, the distillation flasks usually have only one narrow neck and a ground glass joint and are made of thinner glass than the reaction flask, so that it is easier to heat.
Distillation flasks, which are intended to contain mixtures, which are subject to distillation, as well as to receive the products of distillation, distillation flasks are available in various shapes.
The Perkin triangle set-up (Image 5) uses a series of Teflon valves to allow the distilled fractions to be isolated from the distillation flask without the main body of the distillation set-up being removed from either the vacuum or the heat source, and thus can remain in a state of reflux.
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