Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Electrochemical method for extracting rubidium and cesium from brine

An electrochemistry, rubidium-cesium technology, applied in the field of electrochemistry, can solve the problems of difficult mass production, limited surface area of ​​conductive base layer, etc., and achieve the effects of less reagent consumption, high selective separation and utilization rate, and simple operation.

Active Publication Date: 2020-06-02
CENT SOUTH UNIV
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the researchers believe that "this method is difficult to apply to large-scale production, because the deposited electrode film is very thin, about a few hundred nanometers, and the surface area of ​​the conductive base layer is limited.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electrochemical method for extracting rubidium and cesium from brine
  • Electrochemical method for extracting rubidium and cesium from brine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (1) Preparation of working electrode

[0057] Prussian blue (FeFe(CN) 6 ), carbon fiber and PVDF were mixed according to the mass ratio of 90:6:4 to obtain a mixture, 20g of the mixture was coated on a carbon fiber cloth with a size of 10×10cm, and after drying, a working electrode A with a coating thickness of 2.5mm was obtained.

[0058] A 10×10 cm graphite plate was used as working electrode B.

[0059] (2) Cesium intercalation process

[0060] The total volume of the electrolytic cell is 10L, the cathode chamber and the anode chamber are 5L each, and the diaphragm is an anion exchange membrane containing basic active groups. Working electrode B is connected to the anode, and working electrode A is connected to the cathode. The working electrode B and the first anolyte are placed in the anode chamber, and the working electrode A and the first catholyte are placed in the cathode chamber for electrolytic reaction. Work process such as figure 1 As shown, the reacti...

Embodiment 2

[0071] (1) Preparation of working electrode

[0072] Prussian blue in working electrode A is FeNi(CN) 6 , other experimental materials are the same as in Example 1.

[0073] (2) Cesium intercalation process

[0074] The volume of the first catholyte is 10 L, which contains 250 mg / L of CsCl (calculated as Cs), 15 g / L of NaCl, and 10 g / L of KCl, and the pH value of the solution is 5.5. The cell voltage is 1.2V, and the control temperature is room temperature. After working for 4 hours, the concentration of cesium in the first catholyte is lower than 0.5mg / L, and the extraction rate of Cs is 99.8%.

[0075] (3) Cesium removal process

[0076] Replace electrolyzer, other operation process is with embodiment 1. The concentration of cesium in the cesium concentrate is 2400 mg / L, the desorption rate of Cs is 96.2%, and the method realizes the enrichment of Cs in brine by 9.6 times.

[0077] The working electrode A and the working electrode B after the electrolytic reaction in s...

Embodiment 3

[0079] (1) Preparation of working electrode

[0080] Prussian blue in working electrode A is FeMn(CN) 6 , other experimental materials are the same as in Example 1.

[0081] (2) Cesium intercalation process

[0082] The volume of the first catholyte is 100 L, which contains 20 mg / L of CsCl (calculated as Cs), 15 g / L of NaCl, and 10 g / L of KCl, and the pH value of the solution is 6. The cell voltage is 1.2V, and the control temperature is room temperature. After working for 4 hours, the concentration of cesium in the first catholyte is lower than 0.4mg / L, and the extraction rate of Cs is 98%.

[0083] (3) Cesium removal process

[0084] Replace electrolyzer, other operation process is with embodiment 1. The concentration of cesium in the concentrated cesium solution is 1880 mg / L, and the desorption rate of Cs is 95.9%. This method realizes the enrichment of Cs in the brine by 94 times.

[0085] The working electrode A and the working electrode B after the electrolytic rea...

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

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Concentrationaaaaaaaaaa
Concentrationaaaaaaaaaa
Login to View More

Abstract

The invention provides an electrochemical method for extracting rubidium and cesium from brine. According to the method, on the basis of the selectivity of Prussian blue molecular space to rubidium and cesium ions, the rubidium and cesium ions are embedded and separated through electrochemical reduction and oxidation, and a highly-condensed liquid containing the rubidium and the cesium can be obtained, so that selective extraction of the rubidium and the cesium from the brine is realized. The method has the advantages of easiness in operation, small reagent use amount, high selective separation utilization rate and avoidance of production of waste water and waste residues.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to an electrochemical method for extracting rubidium and cesium from brine. Background technique [0002] Rubidium and cesium have similar properties, and their contents in the upper crust are 112ppm and 3.7ppm respectively, and they are mainly distributed in ores and salt lake brine. Extracting metals from ores often requires lengthy metallurgical processes, and due to the low grade of rubidium and cesium in minerals, extraction is difficult, the production process consumes a lot of energy and reagents, and produces more pollution. The extraction of rubidium and cesium from salt lakes avoids these problems, and is a very promising resource development direction. Moreover, there are abundant rubidium and cesium resources in Zabuye Salt Lake in Tibet and Chaerhan Salt Lake in Qinghai (the Rb content in Zabuye Salt Lake in Tibet is 50.9mg / L, and the Cs content is 21.4mg / L; t...

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): C22B26/10C22B7/00
CPCC22B7/006C22B26/10
Inventor 赵中伟何利华赵天瑜孙丰龙
Owner CENT SOUTH UNIV
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com