Device for continuous electrolytic reduction of trivalent europium

Abstract

The invention discloses a device for continuous electrolytic reduction of trivalent europium. The device comprises electrolytic cells, a catholyte overhead tank, an anolyte overhead tank, a catholyte collection tank, an anolyte collection tank and a rare earth liquid tank. According to the device, cathode chambers among the electrolytic cells communicate with one another in a series connection mode, and catholyte flows from the cathode chamber of the previous electrolytic cell to the cathode chamber of the next electrolytic cell and is reduced step by step; anode chambers of the electrolytic cells do not communicate with one another, anolyte in the anode chambers flows independently, and the flow is independently controlled. The electric current density of the electrolytic cells and the acid concentration of the catholyte and the anolyte in the electrolytic cells can be independently controlled, and therefore electrolysis of the electrolytic cells is stable, and the reduction effect is good.

Description

technical field [0001] The invention relates to a device for electrolytic reduction of trivalent europium, in particular to a device for continuous electrolytic reduction of trivalent europium. Background technique [0002] Europium is a good luminescent material activator, such as: Eu 3+ Is the activator of red luminescent material, Eu 2+ It is an activator for blue luminescent materials. Europium oxide, as an activator for luminescent materials, is widely used in LEDs, tricolor energy-saving lamps, high-definition display screens, and new X-ray medical diagnostic systems. At the same time, europium oxide can also be used in lasers, superconducting materials, magnetic bubble storage devices, control materials, shielding materials and structural materials of atomic reactors. Therefore, europium oxide has shown an extremely important position and role in the rapidly developing photoelectric new material technology. [0003] At present, the preparation method of high-purit...

AI Technical Summary

Problems solved by technology

The disadvantage of europium oxide production technology is that the reduction process consumes a large amount of zinc powder, and the subsequent process needs to remove zinc, resulting in zinc-containing wastewater, which increases the difficulty of wastewater treatment

ZL02232964.1 discloses a device for electrolytic reduction of europium. In this device, the anolyte and catholyte flow countercurrently. Although it can meet the acidity requirements of the cathode and anolyte, because it connects all the cathode and anode chambers in series, it cannot Accurate control of the acid concentration of the anode and anode solution in a single electrolytic cell causes the electrolysis conditions of each electrolytic cell to be unable to be controlled independently, resulting in unstable electrolysis and ultimately poor reduction effect

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