The percolation extraction is a process that is conducted at ambient temperature where a
solvent is passed through the plant suitably comminuted.
One proceeds with the loading of the plant, then the solvent is introduced from the top and
passes through the plant material to a suitable speed (5ml / min x kg of the plant) which
depends from the plant extract.
The choice of solvent varies depending on the chemical nature of the active ingredients to
be extracted. Is generally employed a hydroalcoholic solvent which is much more effective
in the extraction since the water keeps the plant walls hydrated while alcohol is to be
affine with most of the active ingredients. The liquid obtained, rich in active ingredients of
the plant, is called leachate.
2- Weight compression
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