An electrochemical cell housing, electro-amalgamation apparatus and method for separating product and non-product lanthanides is provided. The electro-amalgamation apparatus comprises an electrochemical cell with an electrochemical cell housing, where the cell housing comprises an inlet for introducing a substrate into the electrochemical cell for making at least one product. The electrochemical cell comprises an electrochemical cell solution that is held within the cavity and that comprises at least two layers that each have different densities. The electro-amalgamation apparatus comprises an anode element that is at least partially disposed within a lower density layer of the at least two layers, a cathode element that is at least partially disposed within a higher density layer, and a drainage assembly that is coupled to the electrochemical cell for collecting the lower density layer of the at least two layers.

An electrochemical cell housing, electro-amalgamation apparatus and method for separating product and non-product lanthanides is provided. The electro-amalgamation apparatus comprises an electrochemical cell with an electrochemical cell housing, where the cell housing comprises an inlet for introducing a substrate into the electrochemical cell for making at least one product. The electrochemical cell comprises an electrochemical cell solution that is held within the cavity and that comprises at least two layers that each have different densities. The electro-amalgamation apparatus comprises an anode element that is at least partially disposed within a lower density layer of the at least two layers, a cathode element that is at least partially disposed within a higher density layer, and a drainage assembly that is coupled to the electrochemical cell for collecting the lower density layer of the at least two layers.

This lithium-isotope enrichment device comprises a treatment tank which is divided into a supply tank and a recovery tank by means of an electrolyte membrane having lithium ion conductivity, and recovers, into the recovery tank, an aqueous solution ES for the recovery of .sup.6Li of which the isotope ratio of .sup.6Li is high from a Li-containing aqueous solution FS stored in the supply tank. While a power supply, which is connected between a second electrode of a porous structure provided on a recovery tank-side surface of the electrolyte membrane and a third electrode provided to be spaced apart from the electrolyte membrane in the recovery tank, applies a voltage V1 with the second electrode being made to be positive, the lithium-isotope enrichment device connects a first electrode provided in the supply tank to the second electrode.

This lithium-isotope enrichment device comprises a treatment tank which is divided into a supply tank and a recovery tank by means of an electrolyte membrane having lithium ion conductivity, and recovers, into the recovery tank, an aqueous solution ES for the recovery of .sup.6Li of which the isotope ratio of .sup.6Li is high from a Li-containing aqueous solution FS stored in the supply tank. While a power supply, which is connected between a second electrode of a porous structure provided on a recovery tank-side surface of the electrolyte membrane and a third electrode provided to be spaced apart from the electrolyte membrane in the recovery tank, applies a voltage V1 with the second electrode being made to be positive, the lithium-isotope enrichment device connects a first electrode provided in the supply tank to the second electrode.