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Method for separating and recovering mixed vector dispersed supported liquid membrane of heavy rare earth metal

A mixed carrier, separation and recovery technology, applied in chemical instruments and methods, improvement of process efficiency, water/sludge/sewage treatment, etc., can solve the problems of low migration efficiency, unstable supporting liquid film, etc., and improve the mobility , Increase stability and prolong service life

Inactive Publication Date: 2011-03-09
南通升辉建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for separation and recovery of a mixed carrier of heavy rare earth metal dispersed support liquid film, which solves the problems of unstable support liquid film and low migration efficiency in the prior art

Method used

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  • Method for separating and recovering mixed vector dispersed supported liquid membrane of heavy rare earth metal
  • Method for separating and recovering mixed vector dispersed supported liquid membrane of heavy rare earth metal
  • Method for separating and recovering mixed vector dispersed supported liquid membrane of heavy rare earth metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: implement according to the following steps and relevant control parameters,

[0039] Step 1. Mix PC-88A and D2EHPA with a mass concentration of 98% according to a volume ratio of 1:1 to obtain a mixed carrier, and then mix the mixed carrier and kerosene according to a volume ratio of 5:95 to obtain a membrane solution. The solution is mixed with the HCl solution whose concentration is 4mol / L in a volume ratio of 40:20 to obtain the dispersed phase;

[0040] Step 2, mix acetic acid and sodium acetate according to the volume ratio of 50:50 to obtain a buffer solution, and then mix the buffer solution with a concentration of 10 -3 mol / L Eu - (CH 3 COO) 3 4H 2 The solution of O is mixed at a volume ratio of 5:95 to obtain a material liquid phase;

[0041] Step 3. After soaking the PVDF membrane with the membrane solution for 3 hours, insert the PVDF membrane between the dispersion tank and the feed liquid tank, put the dispersed phase into the dispersion ta...

Embodiment 2

[0043] Embodiment 2: according to the step of embodiment 1, control the following parameters to implement,

[0044] Mix PC-88A and D2EHPA with a mass concentration of 98% according to a volume ratio of 1:5 to obtain a mixed carrier, then mix the mixed carrier and kerosene according to a volume ratio of 7:93 to obtain a membrane solution, and mix the membrane solution with a concentration of 2mol The HCl solution of / L is mixed according to the volume ratio of 10:50 to obtain the dispersed phase; Acetic acid and sodium acetate are mixed according to the volume ratio of 10:90 to obtain the buffer solution, and then the buffer solution and the concentration of 10 -3 mol / L of Eu(CH 3 COO) 3 4H 2 The solution of O is mixed according to the volume ratio of 15:85 to obtain the material liquid phase; after soaking the PVDF membrane with the membrane solution for 6 hours, the migration is carried out according to the steps of Example 1, and all the above steps are carried out and com...

Embodiment 3

[0045] Embodiment 3: according to the step of embodiment 1, control the following parameters to implement,

[0046] Mix PC-88A and D2EHPA with a mass concentration of 98% according to a volume ratio of 1:4 to obtain a mixed carrier, then mix the mixed carrier and kerosene according to a volume ratio of 2:98 to obtain a membrane solution, and mix the membrane solution with a concentration of 3mol The HCl solution of / L is mixed according to the volume ratio of 20:30 to obtain the dispersed phase; Acetic acid and sodium acetate are mixed according to the volume ratio of 30:60 to obtain the buffer solution, and then the buffer solution and the concentration of 10 -3 mol / L of Dy(CH 3 COO) 3 4H 2 The solution of O was mixed at a volume ratio of 10:90 to obtain a liquid phase; after soaking the PVDF membrane with the membrane solution for 5 hours, the migration was carried out according to the steps in Example 1, and all the above steps were carried out and completed at room tempe...

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Abstract

The invention discloses a method for separating and recovering mixed vector dispersed supported liquid membrane of heavy rare earth metal, which is implemented in the following steps: PC-88A and D2EHPA are mixed following the volume ratio of 1:1-5 to obtain the mixed vector; then the mixed vector is mixed with kerosene following the volume ratio of 1-7:99-93 to obtain membrane solution; then the membrane solution is mixed with HCI solution with a concentration of 2-6mol / L following the volume ratio of 10-50:50-10 to obtain disperse phase which is put into a dispersing pond; acetic acid and sodium acetate are mixed following the volume ratio of 10-90:90-10 to obtain buffer solution; the buffer solution is mixed with solution of heavy rare earth element Re-(CH3COO)3.4H2O following the volumeratio of 5-15:95-85 to obtain the material liquid phase which is put into a material liquid pond; the polyvinylidene fluoride membrane is soaked in the membrane solution and stirring the material liquid phase and the dispersing phase; when ionic migration ratio of the heavy rare earth element reaches over 98%, stirring is stopped, the colorless aqueous phase solution is the migrated heavy rare earth element ionic solution; the method of the invention enhances stability of the membrane and improves the migration efficiency of the heavy rare earth element.

Description

Technical field: [0001] The invention belongs to the technical field of metal recovery, and relates to a method for separating and recovering heavy rare earth metals from industrial waste liquid, in particular to a method for separating and recovering heavy rare earth metals with a mixed carrier dispersed support liquid membrane. Background technique: [0002] During the development of rare earth mines and related rare earth separation processes, a large amount of rare earth wastewater is often discharged, which seriously pollutes water sources and endangers people's health. Therefore, it is of great practical significance to carry out research on the application of liquid membrane technology to treat rare earth wastewater. On the one hand, it can protect the environment, and on the other hand, it can recover rare earth ions in wastewater. The application of rare earth elements in our production and life is becoming more and more extensive, and the separation and enrichment ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B59/00C22B7/00C02F1/62C02F101/20
CPCY02P10/20
Inventor 姚秉华裴亮赵楠余晓皎付兴隆
Owner 南通升辉建材科技有限公司