Imprinted polymer for separation of perrhenate ions, preparation method and application thereof

A technology of imprinting polymers and perrhenate, which is applied in chemical instruments and methods, other chemical processes, and improvement of process efficiency, can solve the problems of not meeting urgent needs, low efficiency of separation and purification, and low purity of ammonium rhenate. Achieve the effects of improving low desorption rate and low reusability, simple preparation method, good practicability and economic prospects

Active Publication Date: 2021-04-27
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The general method is to dissolve the Re-containing alloy waste first, and then oxidize the Re in the solution to perrhenate ions (ReO 4 - ions), and then prepare high-purity Re by reduction, but the separation and purification efficiency of this method is low, and the obtained ammonium rhenate has low purity, which cannot meet the urgent demand for high-purity ammonium rhenate in my country

Method used

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  • Imprinted polymer for separation of perrhenate ions, preparation method and application thereof
  • Imprinted polymer for separation of perrhenate ions, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Preparation of low-crosslinked polymer: Add 9mL of distilled water and 9mmol of N,N'-methylenebisacrylamide (NMBA) into a three-necked flask. After the NMBA is completely dissolved, add 9mmol of AA and 18mmol of NVP, feed N into the reaction system 2 15min, exclude oxygen, then add 1.2mL of H 2 o 2 -Vc initiator, react for 1.5h. During the whole reaction process, N was continuously fed into the reaction system 2 , and magnetic stirring;

[0031] (2)ReO 4 - -Preparation of IIP rigid polymer: After the reaction, open the rubber stopper of the flask and add 0.5mmol NH 4 ReO 4 , 28mL of distilled water and 35mmol of NMBA, after the NMBA is completely dissolved, add 30mmol of AA and 18mmol of NVP, and feed N to the reaction system 2 12min, then add 1.5mL of H 2 o 2 -Vc initiator to initiate the reaction; after reacting for 15 minutes under stirring conditions, stop stirring, and place the reaction system in a constant temperature water bath at 38°C to continue ...

Embodiment 2

[0037] (1) Preparation of low-crosslinked polymer: Add 6mL of distilled water and 6mmol of N,N'-methylenebisacrylamide (NMBA) into a three-necked flask. After the NMBA is completely dissolved, add 6mmol of AA and 20mmol of NVP, feed N into the reaction system 2 10min, exclude oxygen, then add 1mL of H 2 o 2 -Vc initiator, react for 2h. During the whole reaction process, N was continuously fed into the reaction system 2 , and magnetic stirring;

[0038] (2)ReO 4 - -Preparation of IIP rigid polymer: after the reaction, open the rubber stopper of the flask and add 0.35mmol NH 4 ReO 4 , 20mL of distilled water and 35mmol of NMBA, after the NMBA is completely dissolved, add 35mmol of AA and 20mmol of NVP, and feed N into the reaction system 2 10min, then add 1mL of H 2 o 2 -Vc initiator to initiate the reaction; after reacting for 12 minutes under stirring conditions, stop stirring, and place the reaction system in a constant temperature water bath at 35°C to continue t...

Embodiment 3

[0044] Take by weighing the 20g ReO that embodiment 1 prepares 4 - -IIP particles are packed into 200 mesh tea bags, and the tea bags are placed in a beaker containing 100mL 0.5mmol / L rhenium-containing alloy waste solution, the beaker is sealed, and then the reaction system is placed in a constant temperature water bath at 40°C. 10min time sampling is measured by ICP and the adsorption amount is calculated. At 25°C, the 4 - The adsorption capacity is 0.0807mmol / g. After the adsorption is over, it will be filled with ReO 4 - -Take out the IIP tea bag, rinse the surface of the tea bag with distilled water, then place the tea bag in a beaker containing 100mL of distilled water, and desorb it in a constant temperature water bath at 40°C for 8 hours. Its desorption rate is 72.65% at 25°C.

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Abstract

The invention discloses an imprinted polymer for separating perrhenate ions, a preparation method and application thereof, and belongs to the field of hydrometallurgy. In this method, perrhenate (ReO 4 ‑ ) is a template ion, N-vinylpyrrolidone (NVP) and acrylic acid (AA) are functional monomers, N'N-methylenebisacrylamide (NMBA) is a crosslinking agent, H 2 o 2 ‑Vc is the initiator, water is the solvent, and the perrhenate ion-imprinted polymer (ReO 4 ‑ ‑IIP), and use it as an adsorption adsorbent to separate and recover the rhenium (Re) element in the rhenium-containing waste solution, which improves the separation effect and recovery efficiency of Re. The ion imprinted polymer prepared by the invention has high selectivity, large adsorption capacity, high desorption rate and high reuse rate, and makes up for the shortcomings of traditional separation materials in the field of alloy wet recovery.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to an imprinted polymer for separating perrhenate ions, a preparation method and application thereof. Background technique: [0002] Rhenium (Re) is a rare metal widely used in super heat-resistant components in the fields of national defense, aerospace, nuclear energy, and electronics industries, and its demand is rising rapidly. However, the world's Re reserves are less than 2,500 tons, and my country's is only more than 200 tons. The contradiction between reserves and demand has prompted the price of Re to rise to about 30,000 yuan / kg at present. Therefore, the recovery of rare and precious metals such as Re from alloy waste can not only realize the full utilization of resources, alleviate the problem of insufficient production raw materials, but also reduce costs and increase economic benefits, which is of great significance. [0003] The general method is to dissolve t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F226/10C08F220/06C08F222/38C08J9/26B01J20/26B01J20/30C22B7/00C22B61/00
CPCB01J20/268C08F226/10C08J9/26C08J2339/06C22B7/006C22B61/00C08F220/06C08F222/385Y02P10/20
Inventor 陈振斌孙元周亦胄柳春丽贾维伟陈正灿汪润田
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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