Extraction Technologies for Medicinal and Aromatic ... - Capacity4Dev

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5 DECOCTION AND HOT CONTINUOUS EXTRACTION TECHNIQUES 5.5.2.3 Bonotto Extractor The Bonotto extractor is used for counter-current extraction according to the immersion method. The solid material is transported by the mixer on a tray until it reaches the open sector where it falls onto the next tray. The screw conveyor at the outlet withdraws the extracted solid material (underfl ow) and prevents the solution from fl owing out of the extractor. 5.5.2.4 Bollmann Extractor Figure 7: Bonotto extractor The fresh solvent is added during the upward movement of the baskets so that this part operates in counter current. The already preloaded solution is withdrawn from the bottom of the extractor and enters the downward-moving baskets so that this part of the extractor operates in a co-current way. The full miscella is withdrawn at the bottom of the extractor. 100
EXTRACTION TECHNOLOGIES FOR MEDICINAL AND AROMATIC PLANTS In the baskets, self-fi ltration takes place, so that no further treatment of the miscella before distillation is necessary. 5.5.2.5 Kennedy Extractor Figure 8: Bollmann extractor The solid material is transported by paddles from one chamber to the next, in counter-current way to the solvent. The chamber where the miscella is withdrawn is used as a fi ltration unit where fi ne particles are separated from the extract solution. Figure 9: Kennedy extractor 101
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Extraction Technologies for Medicin
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Extraction Technologies for Medicin
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CONTRIBUTORS Chapter 6 Aqueous Alco
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EXTRACTION TECHNOLOGIES FOR MEDICIN
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13 COUNTER-CURRENT CHROMATOGRAPHY 1
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13 COUNTER-CURRENT CHROMATOGRAPHY
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