Page 48 - phytochemistry I - PharmD Clinical

c- Direct steam distillation:
No water is kept in the bottom of the still.
Superheated steam and frequently at pressure higher than atmospheric,
is introduced through open or perforated steam coil, below the charge,
and proceed upward through the plant material above the supporting grid.

The oil separator
The mixture of the oil and water is passed through condenser, then oil is
separated from the aqueous layer and can be isolated, usually by use of
a Florentine receiver. There are 2 types of Florentine receiver:

Receiver for Receiver for
oils lighter oils heavier
than water than water

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