Method for continuous electrolytic reduction of three-valence europium

A technology of trivalent europium and trivalent europium ions, applied in the electrolysis process, electrolysis components, cells, etc., can solve the problems of electrolysis instability, consumption of zinc powder, and production of zinc-containing wastewater, and achieve good reduction effect and stable electrolysis Effect

Active Publication Date: 2016-07-20
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 ...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The single rectangular diaphragm electrolyzer is composed of an anode chamber and a cathode chamber. The volume of the anode chamber and the cathode chamber is 20L, and the middle is separated by an ion exchange membrane of model AM-203. The anode is made of titanium-based metal plate coated with ruthenium and iridium. The cathode adopts a metal titanium plate; the cathode chambers of the four electrolytic cells are connected in series, and the anode chambers are not connected. The anolyte is rare earth material liquid, the concentration of rare earth is 0.015mol / L, H + The concentration is 0.01mol / L; the catholyte is a rare earth chloride solution, the concentration of trivalent europium ions is 1.57mol / L, and the concentration of H + The concentration is 0.0012mol / L. According to the anolyte flow rate of 0.1L / min, according to the catholyte flow rate of 0.6L / min, stay in a single anode chamber for more than 0.5 hours, respectively add the anode chamber and cathode ch...

Embodiment 2

[0013] Electrolyzer is the same as embodiment 1, totally six electrolyzers, and the cell volume is identical.

[0014] The anolyte is rare earth material liquid, the concentration of rare earth is 0.19mol / L, H + Concentration 0.5mol / L; catholyte rare earth chloride solution, trivalent europium ion concentration 0.13mol / L, H + The concentration is 0.23mol / L.

[0015] Operation is with embodiment 1.

[0016] The anolyte flow rate is 0.1L / min, the catholyte flow rate is 0.5L / min, and the residence time in a single anode chamber is more than 0.6 hours, respectively added to the anode chamber and cathode chamber of the first electrolytic cell, and the current density is 800A / m 2 ;

[0017] Anolyte flow rate 0.2L / min is added to the anode chamber of the second electrolytic cell, and the current density is 700A / m 2 ;

[0018] The anolyte flow rate is 0.3L / min and is added to the anode chamber of the third electrolytic cell, and the current density is 600A / m 2 ;

[0019] Anolyt...

Embodiment 3

[0024] The rectangular diaphragm electrolyzer is composed of an anode chamber and a cathode chamber, a total of six electrolyzers, and the volume of the anode chamber and the cathode chamber is 30L. The anode chamber and the cathode chamber are separated by an ion-exchange membrane of model UTX-UIF-A, the anode is made of titanium-based coated ruthenium and iridium metal mesh, and the cathode is made of metal titanium mesh.

[0025] The anolyte is rare earth material liquid, the concentration of rare earth is 1.8mol / L, H + The concentration is 0.5mol / L; the catholyte is a rare earth chloride solution, the concentration of trivalent europium ions is 0.9mol / L, and the concentration of H + The concentration is 1.58mol / L.

[0026] Operation is with embodiment 1.

[0027] The anolyte flow rate is 0.1L / min, the catholyte flow rate is 0.25L / min, and the residence time in a single anode chamber is about 2 hours, respectively added to the anode chamber and cathode chamber of the firs...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for continuous electrolytic reduction of three-valence europium. The method includes the steps that anode liquor is added into all electrolytic cell anode chambers, and cathode liquor is added into a first electrolytic cell cathode chamber; then the cathode liquor sequentially flows from the first electrolytic cell cathode chamber to a next electrolytic cell cathode chamber until entering the Nth cathode chambers, wherein the flow ratio of the cathode liquor to the anode liquor is 0.1 -10:1, the standing time ranges from 0.5 hours to 2 hours, and the density of electric current in all electrolytic cells ranges from 100 A/m<2> to 1600 A/m<2>; anode liquor flowing out from all electrolytic cell anode chambers is collected and returns to all electrolytic cell anode chambers according to flow after ingredients are merged and mixed; and cathode liquor flowing out from the last electrolytic cell cathode chamber is material liquid obtained after reduction. By means of the method for continuous electrolytic reduction of three-valence europium, the electric current density of all electrolytic cells and the acid concentration of the cathode liquor and the anode liquor in single electrolytic cells can be conveniently and independently controlled, electrolysis of the electrolytic cells is stable, and the reduction effect is good.

Description

technical field [0001] The invention relates to a method for electrolytic reduction of trivalent europium, in particular to a method 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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C25B1/00C25B9/18C25B15/00
CPCC25B1/00C25B15/00C25B9/70
Inventor 刘志强邱显扬朱薇李伟郭秋松张魁芳高远曹洪杨金明亚
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap