The figure shows the construction of a solid/liquid extractor in which the solvent is continuously circulated between the evaporator, reflux condenser and extraction vessels. Two extraction vessels have been incorporated and during operation, these can be alternatively switched into or out of the stream of condensed solvent to facilitate re-charging of the solid. Heating is carried out by means of a glass reboiler arrangement and on termination of the process, the solvent can be separated from the extract by further evaporation. Alternatively, an additional condenser can be incorporated through which the solvent can be removed.
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