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Thermo-sensitive ionic imprinting polymer for separating high rhenium acid radical ions and preparation method and application of thermo-sensitive ionic imprinting polymer

A temperature-sensitive polymer, perrhenate technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of difficult to improve adsorption and desorption performance at the same time, limited application, inflexibility, etc., to improve the low desorption rate. and low reusability, simple preparation method, precise and efficient separation

Inactive Publication Date: 2019-10-18
LANZHOU UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The ion-imprinted polymer (IIP) prepared by the traditional method has a highly cross-linked structure. Although its structure is stable and its recognition is strong, the recognition process is simple, mechanical, and not "flexible", which leads to adsorption and desorption performance in the separation and purification process. It is difficult to improve at the same time, which limits its application in industrial separation

Method used

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  • Thermo-sensitive ionic imprinting polymer for separating high rhenium acid radical ions and preparation method and application of thermo-sensitive ionic imprinting polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Weigh 10mmol of N,N-diethylbisacrylamide (DEA), and azobisisobutyronitrile (AIBN) and trithiododecanoic acid-2-carboxyisopropyl ester reagent (RAFT) Mix according to a certain ratio, and use ethyl acetate as a solvent to prepare a solution. Wherein: the molar ratio of AIBN, RAFT reagent and DEA is 1:20:1000, and the mass percent concentration of the prepared solution is 40%. N in the solution 2 After 15 minutes, the mixture was stirred and reacted in an oil bath at 70° C. for 20 hours to obtain a thermosensitive polymer poly-N,N-diethylacrylamide (PDEA) with a molecular weight of 3600.

[0029] (2) Weigh 0.15 g of the temperature-sensitive polymer PDEA prepared in step (1), add it into 30 mL of methanol / water (volume ratio 60:40) mixed solvent to dissolve, and obtain a mixed solution containing the temperature-sensitive polymer.

[0030](3) Add 30mmolN, N-methylenebisacrylamide (NMBA) into the mixed solvent containing thermosensitive polymer obtained in step (2)....

Embodiment 2

[0033] (1) Weigh 10 mmol of N,N-diethylbisacrylamide (DEA), and azobisisobutyronitrile (AIBN) and trithiododecanoic acid-2-carboxyisopropyl ester reagent (RAFT) Mix according to a certain ratio, and use ethyl acetate as a solvent to prepare a solution. Wherein: the molar ratio of AIBN, RAFT reagent and DEA is 1:30:2000, with ethyl acetate as solvent, prepared the solution of 45% (mass percentage concentration), pass N 2 After 15 minutes, stir and react in an oil bath at 65°C for 16 hours to obtain a temperature-sensitive polymer poly-N,N-diethylacrylamide (PDEA)

[0034] (2) Weigh 0.2 g of the temperature-sensitive polymer PDEA prepared in step (1), add it to 40 ml of methanol / water (volume ratio 70:30) and dissolve it in a mixed solvent to obtain a mixed solution containing the temperature-sensitive polymer

[0035] (3) Add 40mmol N,N-methylenebisacrylamide (NMBA) into the mixed solution containing temperature-sensitive polymer obtained in step (2). After the NMBA is comple...

Embodiment 3

[0038] (1) Weigh 20mmol of N,N-diethylbisacrylamide (DEA), and azobisisobutyronitrile (AIBN) and trithiododecanoic acid-2-carboxyisopropyl ester reagent (RAFT) Mix according to a certain ratio, and use ethyl acetate as a solvent to prepare a solution. Wherein: the mol ratio of AIBN, RAFT reagent and DEA is 1:40:4000, is solvent with ethyl acetate, has prepared the solution of 40% (mass percentage concentration), passes N 2 After 12 minutes, the mixture was stirred and reacted in an oil bath at 70° C. for 20 hours to obtain a thermosensitive polymer poly-N,N-diethylacrylamide (PDEA) with a molecular weight of 3600.

[0039] (2) Weigh 0.15 g of the temperature-sensitive polymer PDEA prepared in step (1), add it to 300 ml of methanol / water (volume ratio 70:30) mixed solvent to dissolve, and obtain a mixed solution containing the temperature-sensitive polymer.

[0040] (3) Add 35mmol N,N-methylenebisacrylamide (NMBA) into the mixed solution containing temperature-sensitive polym...

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Abstract

The invention discloses a thermo-sensitive ionic imprinting polymer for separating high rhenium acid radical ions and a preparation method and application of the thermo-sensitive ionic imprinting polymer and belongs to the field of wet-method metallurgy. The preparation method comprises the following steps: preparing a thermo-sensitive polymer N,N-diethyl acrylamide (PDEA) through a reversible addition-fragmentation transfer (RAFT) polymerization reaction, and introducing the thermo-sensitive polymer into a synthesis process for separating high rhenium acid radical ionic imprinting polymer (ReO4<->-IIP) for secondary polymerization, so as to obtain an imprinting polymer which has a thermo-sensitive block and is used for separating high rhenium acid radical ions. With the polymer as an adsorption carrier, precise separation on the rhenium (Re) element in a rhenium-containing solution is achieved, and the recycling efficiency of Re is greatly improved. The ionic imprinting polymer with the thermo-sensitive block, which is disclosed by the invention, is high in carrier selectivity, large in adsorption capacity, high in desorption rate and high in repeated use rate, and defects of a conventional separation material in the field of wet-method recycling of alloys can be made up.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a temperature-sensitive ion-imprinted polymer for separating perrhenate ions, a preparation method and application thereof. Background technique: [0002] The ion-imprinted polymer (IIP) prepared by the traditional method has a highly cross-linked structure. Although its structure is stable and its recognition is strong, the recognition process is simple, mechanical, and not "flexible", which leads to adsorption and desorption performance in the separation and purification process. It is difficult to improve at the same time, which limits its application in industrial separation. Thermosensitive polymers have a specific minimum critical phase transition temperature (LCST), and the sol-gel transition of the polymer can be achieved by changing the temperature. When the ambient temperature is lower than the LCST, the polymer molecular chains are in the state of random coils...

Claims

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Application Information

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IPC IPC(8): C08F293/00B01J20/26B01J20/30
CPCB01J20/268C08F293/005C08F2438/03
Inventor 陈振斌周亦胄孙元张洪宇柳春丽
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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