Suction filtration

The filter, which is placed at the bottom of the Büchner funnel, separates the solids from the liquids.

The solid residue, which remains at the top of the Büchner funnel, is therefore recovered more efficiently: it is much drier than it would be with a simple filtration.

The rubber conical seal ensures the apparatus is hermetically closed, preventing the passage of air between the Büchner funnel and the vacuum flask.

Filtration is a unit operation that is commonly used both in laboratory and production conditions.

The product of synthesis is then recovered faster, and the solid is drier than in the case of a simple filtration.