Process and apparatus for the continuous removal of undesirable components of solid particles by a solvent applied in counterflow
AssigneeGesellschaft zur Forderund der Forschung an der Eidgenossischen Technischen Hochschule
InventorBernard Stofer
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Abstract
A cyclical and automatable process and apparatus for continuously removing undesired components from solid particles by means of a solvent, the process including maintaining an expanded bed of solid particles in a vertical column, supplying a suitable solvent to the bed to flow through the bed either upwardly or downwardly in a selectably alternating manner, supplying solid particles to the top of the column while the solvent flows upwardly therethrough and interrupting the supply of solid particles and removing a bottom portion of the bed by the solvent when it flows downwardly.
Claims6
Apparatus for the continuous elimination of undesirable components of solid particles by a solvent streaming in counterflow through a bed of solid particles, the improvement comprising a tube, a respective inlet for a solvent at each end of the tube and a respective, essentially coaxial valve for charging and discharging solid particles;
- an essentially coaxial decanter vessel disposed above the said valve for charging solid particles, a charging opening for solid particles and an overflow for solvent provided for said decanter vessel;
- a discharging device arranged under the lower outlet valve for solid particles and a valve arrangement connected to the said inlets of solvent for an alternatable supply of solvent into the tube through one or the other inlet.
Dependencies are inferred from the claim text.