COMENIUS EUROPEAN PROJECT
EQUIPMENTS – HUSK OIL
COMENIUS EUROPEAN PROJECT
Sansa
AR
Esano
Acqua
VB
Olio di sansa
Fig.
Estrazione dell’olio dalla sansa
Cups elevator can be used to
construct equipments aimed not at
transportation but – for instance –
at the husk oil extraction.
This is the husk oil extraction
process.
Husk results from the olives’
squeezing out and contains from 5
to 7 percent of oil.
This oil can be recovered by means
of extraction using appropriate
solvents; the most frequently used
solvents are trichloroethylene,
carbon disulphide, dicloro ethane,
hexane, light gasoline. The last
two are the ones that can, better
than the others, produce a less
impure husk oil.
COMENIUS EUROPEAN PROJECT
Sansa
AR
Esano
Acqua
VB
Olio di sansa
Fig.
Estrazione dell’olio dalla sansa
Bollman’s extractor employs a cups
conveyor with a pierced bottom;
husk is loaded from the top, on
the left side (see fig.), comes
down then goes up again and is
downloaded on the right side
thanks to a device that knocks
over the cups (cups that generally
are never knocked down being
hinged above the barycentre).
The sprayed solvent is introduced
into the right side, on the top of
the equipment, passes through the
husk in the cup, slides through its
holes and “rains” onto the cup
placed underneath; then, husk and
solvent, in the right arm, move
counter-current.
COMENIUS EUROPEAN PROJECT
Sansa
AR
Esano
Acqua
VB
Olio di sansa
Fig.
Estrazione dell’olio dalla sansa
The solvent and the oil –
extracted but not saturated - are
collected in a container placed
under the right arm and is sucked
by a pump and “rained” onto the
left side cups: here the
solvent/husk connection moves
equi-current.
The solvent, now enriched with the
husk oil is collected in a second
container placed under the left
arm of the equipment.
COMENIUS EUROPEAN PROJECT
Sansa
AR
Esano
Acqua
VB
Olio di sansa
Fig.
Estrazione dell’olio dalla sansa
The solvent’s (hexane) boiling point
(69 centigrades) is much inferior
to the oil’s one (ca. 300
centigrades), so that they can be
easily separated by distillation or,
better, by stripping (for instance
at 100 centigrades or less) to
avoid to degrade the oil
fragrances. This is the reason why
the solution is sent into a stripper:
the oil comes out in the bottom,
the solvent, that is usually
recycled comes out at the top.
COMENIUS EUROPEAN PROJECT
THE END
Prof. A. LAFRATTA
Prof. M. TIBERINI
Classe 3°B chimici