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Method for electrochemically extracting uranium from seawater by using oxygen vacancy-containing metal oxide

An oxide and oxygen vacancy technology, applied in chemical instruments and methods, uranium oxide/hydroxide, uranium dioxide, etc., can solve the problems of difficult recycling, poor selectivity, and high production costs, and achieve a simple extraction method. easy effect

Active Publication Date: 2020-04-03
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical precipitation method has simple equipment, low cost and high efficiency, but the polymer produced by the reaction needs to be further concentrated, dehydrated and solidified; the ion exchange method has high extraction efficiency and good purification effect, but is expensive, poor in selectivity, and limited in exchange capacity; The separation method is simple to operate, low in energy consumption, and strong in adaptability, but it has high requirements on the quality of raw water and often needs to be used in combination with other water treatment technologies; while the adsorption method requires a large amount of treatment and strong selectivity of the adsorbent for the adsorbent. , strong corrosion resistance, high mechanical strength, etc., and the existing adsorption materials still have defects such as low adsorption efficiency, high production cost, and difficult recycling and reuse in practical applications.

Method used

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  • Method for electrochemically extracting uranium from seawater by using oxygen vacancy-containing metal oxide
  • Method for electrochemically extracting uranium from seawater by using oxygen vacancy-containing metal oxide
  • Method for electrochemically extracting uranium from seawater by using oxygen vacancy-containing metal oxide

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Embodiment 1

[0034] A method for electrochemically extracting uranium from seawater using metal oxides containing oxygen vacancies, comprising the following steps:

[0035] Step 1, add 3g In(NO 3 ) 3 4.5H 2 O was dissolved in 300mL of isopropanol, stirred for 0.5 hours, and ultrasonicated for 1 hour to obtain an indium nitrate isopropanol solution; 100 g of glycerol was added to the indium nitrate in isopropanol solution, stirred for 0.5 hours, and ultrasonicated for 0.5 hours to obtain a mixed solution ; The power of the ultrasound is 800W, and the frequency is 35KHz;

[0036] Step 2. Transfer the mixed solution to a polytetrafluoroethylene high-temperature and high-pressure reactor, raise the temperature to 180°C at a rate of 5°C / min, keep it warm for 1 hour, and cool to room temperature naturally, then separate the solid from the liquid, and use deionized water to separate the solids. Wash with ethanol, then dry in a vacuum oven at 60°C for 12 hours to obtain a spherical indium hydro...

Embodiment 2

[0043] A method for electrochemically extracting uranium from seawater using metal oxides containing oxygen vacancies, comprising the following steps:

[0044] Step 1, add 3g In(NO 3 ) 3 4.5H 2 O was dissolved in 300mL isopropanol, stirred for 1 hour, and ultrasonicated for 0.5 hours to obtain an indium nitrate isopropanol solution; 100 g of glycerol was added to the indium nitrate isopropanol solution, stirred for 1 hour, and ultrasonically used for 0.5 hours to obtain a mixed solution ; The power of the ultrasound is 800W, and the frequency is 40KHz;

[0045] Step 2. Transfer the mixed solution to a polytetrafluoroethylene high-temperature and high-pressure reactor, raise the temperature to 185°C at a rate of 5°C / min, keep it warm for 2 hours, and cool it to room temperature naturally, then separate the solid from the liquid, and use deionized water to separate the solids. Wash with ethanol, then dry in a vacuum oven at 60°C for 12 hours to obtain a spherical indium hydro...

Embodiment 3

[0052] A method for electrochemically extracting uranium from seawater using metal oxides containing oxygen vacancies, comprising the following steps:

[0053] Step 1, add 3g In(NO 3 ) 3 4.5H 2 O was dissolved in 300mL of isopropanol, stirred for 1 hour, and ultrasonicated for 1 hour to obtain an indium nitrate isopropanol solution; 100 g of glycerol was added to the indium nitrate in isopropanol solution, stirred for 1 hour, and ultrasonicated for 1 hour to obtain a mixed solution ; The power of the ultrasound is 800W, and the frequency is 40KHz;

[0054] Step 2. Transfer the mixed solution to a polytetrafluoroethylene high-temperature and high-pressure reactor, raise the temperature to 200°C at a rate of 5°C / min, and keep it warm for 1 hour. After cooling to room temperature naturally, separate the solid and liquid, and use deionized water to separate the solids. Wash with ethanol, then dry in a vacuum oven at 60°C for 12 hours to obtain a spherical indium hydroxide solid...

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Abstract

The invention discloses a method for electrochemically extracting uranium from seawater by using an oxygen vacancy-containing metal oxide, and the method comprises the following steps: adding glycerolinto an indium nitrate isopropanol solution, and transferring into a high-temperature high-pressure reaction kettle to react to obtain a spherical indium hydroxide solid; dissolving the spherical indium hydroxide solid in deionized water, and then transferring into the high-temperature high-pressure reaction kettle to react so as to obtain a flaky indium hydroxide solid; calcining the flaky indium hydroxide solid to obtain calcined In2O3-x with oxygen vacancies; adding the In2O3-x into ethanol, and then adding a membrane solution; uniformly coating carbon paper with the solution, naturally drying, clamping the dried carbon paper by using a gold electrode, and using the dried carbon paper as a working electrode in a three-electrode system, wherein a counter electrode in the three-electrodesystem is a platinum wire, and a reference electrode is a calomel electrode; adding simulated seawater into an electrolytic tank, placing the three-electrode system in the simulated seawater of the electrolytic tank, and stirring the simulated seawater for electrolysis to realize uranium extraction.

Description

technical field [0001] The invention relates to a method for extracting uranium from seawater, in particular to a method for electrochemically extracting uranium from seawater by using metal oxides containing oxygen vacancies. Background technique [0002] Uranium is a raw material for nuclear power, and there are very few uranium reserves in natural ores. At present, the global exploitable ore uranium resources are limited, and the total water volume of the world's oceans is about 1.37×10 12 m 3 , the total reserve of uranium in seawater reaches 4.29 billion tons, nearly 1,000 times that of land reserves. With the development of nuclear power and low-carbon economy, the demand for uranium resources is increasingly urgent. Based on the scarcity of uranium and the limited uranium mineral resources, it is of great significance to extract uranium from seawater as a supplement or substitute for traditional ore-like uranium resources. [0003] Currently, uranium extraction met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00C25B11/06C01G15/00
CPCC25B1/00C01G15/00C25B11/095C25C7/02C25C7/06C25C1/22C01G43/025C01P2002/72C01P2004/03C01P2002/85
Inventor 竹文坤何嵘李怡段涛雷佳陈涛杨帆
Owner SOUTHWEAT UNIV OF SCI & TECH
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