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Ultrasonic strengthening extraction separation method of cerium-rich rare earth nitrate solution

A cerium-rich rare earth, ultrasonic strengthening technology, applied in the field of hydrometallurgy, can solve the problems of high average cell voltage, electrochemical reaction rate, current efficiency and low oxidation rate, achieve low power consumption, solve the contradiction between mixing and clarification , the effect of high apparent current density

Inactive Publication Date: 2007-08-08
YANGZHOU UNIV +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of electrochemical cerium oxidation, when the cerium concentration is low, the electrochemical reaction rate, current efficiency and oxidation rate are low, while the average cell voltage is high

Method used

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  • Ultrasonic strengthening extraction separation method of cerium-rich rare earth nitrate solution
  • Ultrasonic strengthening extraction separation method of cerium-rich rare earth nitrate solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: Main equipment: 1000ml stirred tank, probe type ultrasonic generator, fixed bed ion-exchange membrane electrochemical reactor, analytical testing instrument etc.

[0031] Main raw materials: nitric acid, TBP extractant, kerosene, cerium-rich rare earth nitrate solution.

[0032] The processing steps described in the present embodiment are as follows:

[0033] (1) Ultrasonic extraction: Add 600ml of cerium-rich rare earth nitrate solution, 120ml of extract mixed with TBP and kerosene into the ultrasonic extraction equipment, REO=200g / L in the cerium-rich rare earth nitrate solution, CeO 2 / REO=47%, place the probe of the probe-type ultrasonic generator in the mixed material, control the operating temperature at 5°C, adjust the ultrasonic generator, adjust the frequency to 19kHz, and the ultrasonic intensity is 0.2W / cm 2 , under the action of an ultrasonic generator, the extraction and separation operation is carried out. After ultrasonic extraction and sep...

Embodiment 2

[0036] Embodiment 2: main equipment: 1500ml stirred tank, probe type ultrasonic generator, fixed-bed ion-exchange membrane electrochemical reactor, analytical testing instrument etc.;

[0037] Main raw materials: nitric acid, TBP extractant, kerosene, cerium-rich rare earth nitrate solution;

[0038] The processing steps described in the present embodiment are as follows:

[0039] (1) Ultrasonic extraction: Add 600ml of cerium-rich rare earth nitrate solution, 600ml of extract mixed with TBP and kerosene into the ultrasonic extraction equipment, REO=200g / L in the cerium-rich rare earth nitrate solution, CeO 2 / REO=47%, place the probe of the probe-type ultrasonic generator in the mixed material, control the operating temperature to 40°C, adjust the ultrasonic generator, adjust the frequency to 25kHz, and the ultrasonic intensity to 2.0W / cm 2 , under the action of an ultrasonic generator, the extraction and separation operation is carried out. After ultrasonic extraction and s...

Embodiment 3

[0042] Embodiment 3: main equipment: 2500ml stirred tank, probe type ultrasonic generator, fixed bed ion-exchange membrane electrochemical reactor, analytical testing instrument etc.

[0043] Main raw materials: nitric acid, TBP extractant, kerosene, cerium-rich rare earth nitrate solution.

[0044] The processing steps described in the present embodiment are as follows:

[0045] (1) Ultrasonic extraction: Add 500ml of cerium-rich rare earth nitrate solution, 1000ml of extract mixed with TBP and kerosene into the ultrasonic extraction equipment, REO=200g / L in the cerium-rich rare earth nitrate solution, CeO 2 / REO=47%, place the probe of the probe-type ultrasonic generator in the mixed material, control the operating temperature to 60°C, adjust the ultrasonic generator, adjust the frequency to 80kHz, and the ultrasonic intensity to 20.0W / cm 2 , under the action of an ultrasonic generator, the extraction and separation operation is carried out. After ultrasonic extraction and ...

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Abstract

The invention discloses an ultrasonic strengthening extracting separating method of enriched cerium from rare earth nitrate solution, which comprises the following steps: extracting enriched material of light, middle and heavy rare earth nitrate through ultrasound; oxidizing Ce3+ into Ce4+; extracting refined cerium solution through ultrasound; reserving Ce3+ and other tervalent rare earth elements in the solution.

Description

Technical field: [0001] The invention relates to a method for separating a cerium-rich rare earth nitrate solution, which belongs to the field of hydrometallurgy. technical background: [0002] The process of extraction-electrochemical oxidation-extraction separation is a mature and stable process route for treating cerium-rich rare earth nitrate solution. The typical production process and method are the U.S. patent (USP4,676,957) and Wu Wenyuan introduced the use of electrolytic oxidation-reduction-extraction in the French Rhone-Planck rare earth plant in "Rare Earth Metallurgy" Chemical Industry Press, 2005.12, P147-150 Production of CeO from Rare Earth Nitrate Solution Rich in Cerium 2 Methods. The process makes full use of the difference in the extraction capacity of metal ions and extractants and the valence-changing characteristics of cerium for separation. [0003] In the process method, the extraction operation is carried out under stirring conditions. Its main ...

Claims

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Application Information

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IPC IPC(8): C22B3/00C22B3/36C22B3/44C22B3/26
CPCY02P10/20
Inventor 许文林王雅琼魏晓廷朱金玉魏巍顾及人
Owner YANGZHOU UNIV
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