Hot extraction according to Twisselmann
Hot extraction according to Twisselmann
In the Twisselmann process, the vessel in which the extraction thimble is placed is open at the bottom; the extract immediately flows back into the distillation flask. The extraction thimble is constantly rinsed by the solvent from above and hot steam circulates from below.
behrotest® serial extraction device for hot extraction in accordance with Twisselmann
Extraction according to Twisselmann is a continuous hot extraction. It functions similar to Soxhlet extraction. However the temperature in the Twisselmann extractor is very hot in the sample, i.e. close to the boiling point of the solvent. This improves solubility and shortens the extraction time.
The higher extraction temperature is due to the fact that the condensed solvent flows from above and the ascending hot solvent vapor flows from below through the extraction sleeve simultaneously and mix there. The temperature of this mixture is far higher than the temperature of the condensed solvent.
Compared to Soxhlet extraction, the extraction time with Twisselmann extraction is reduced by up to 50%.
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