Circulatory distillation apparatus

The following techniques are used mainly for trapping small amounts of volatiles from aromatic plants in research laboratories and partly for determination of the essential oil content in plant material. The most often used device is the circulatory distillation apparatus, basing on the... 

Fig. VI-2 Circulatory distillation apparatus with heating devices and an electrode system...

Utzinger s device has been developed further by the VEB Jenaer Qlaswerk Schott Gen., Jena, Gennany, who have constructed a macro- and micro-cascade apparatus (Fig. 206). Since this device is built up of separate parts it can be set up for any number of fractions. Every step of the cascade may be adjusted to a different temperature by means of its circulatory heater. Degassing is carried out independently in the apparatus shown in Fig. 207. In this way account is taken of the fact that degassing and the actual distillation frequently have to be performed at different rates. 

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