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Rare earth element adsorption separation material

A technology for adsorbing and separating materials and elements, which is applied in the direction of solid adsorbent liquid separation, separation method, filtration and separation, etc. It can solve the problems of lack of price stability and exceeding demand expectations, and achieve the effect of improving treatment efficiency and large adsorption capacity.

Active Publication Date: 2017-08-01
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regarding the supply status of rare earth elements, the crisis of these resources has been highlighted because the producing countries are very limited, the price is not stable, and the demand is expected to exceed the supply in the near future

Method used

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  • Rare earth element adsorption separation material
  • Rare earth element adsorption separation material
  • Rare earth element adsorption separation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0135]

[0136] 16.5 g (0.1 mol) of 2-aminoethyl methacrylate hydrochloride was dissolved in 120 ml of THF, and 15.2 g (0.15 mol) of TEA was poured thereto under cooling with ice. 80 ml of a THF solution containing 11.6 g (0.1 mol) of diglycolic anhydride was added dropwise thereto while maintaining the temperature below 10° C., then the mixture was returned to room temperature, and stirring was continued overnight (about 12 hours).

[0137] The reaction solution was filtered, the filtrate was passed through a silica gel column as it was, washed with THF as an eluent, and the eluted fraction was concentrated. Toluene was added to the obtained concentrate to crystallize, and the precipitated crystals were collected by filtration. The obtained crystals were washed with toluene and dried to obtain DGAA-methacrylate.

[0138]

[0139] Vinylon nonwoven fabric was used as a polymer substrate, and a 50 wt% aqueous solution of DGAA-methacrylate obtained above was used as a monome...

Embodiment 2

[0143]

[0144] Polyethylene nonwoven fabric was used as the polymer substrate, and glycidyl methacrylate (GMA) was used as the monomer solution. To remove dissolved oxygen in the monomer solution, the solution was bubbled with nitrogen for 1 hour.

[0145] The polymer substrate is irradiated with a 90kGy electron beam, and the irradiated polymer substrate is quickly immersed in the monomer solution. The polymer substrate was reacted with the monomer solution at 70° C. for 4 minutes, thereby bonding the grafted chains to the polymer substrate. Then, after thoroughly washing with pure water, the polymer substrate was dried at 40° C. for 1 hour or more, thereby obtaining a GMA-bonded substrate. The graft ratio by weight was 97% by weight.

[0146] Then, the GMA-bonded substrate was dipped in ethylenediamine and allowed to react at 60° C. for 6 hours. The resulting reactant was thoroughly washed sequentially with ethanol and pure water, and dried at 60° C. under reduced pres...

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PUM

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Abstract

The purpose of the present invention is to provide an adsorption separation material enabling selective adsorption of a rare earth element, and exhibiting excellent adsorption and recovery performance using a simplified device and operation. This adsorption separation material selectively recovers a rare earth element dissolved in an aqueous solution, wherein at least one diglycol amide acid-type ligand represented by the following general formula (2) is bonded to a polymer substrate by graft polymerization. (In formula (2): R represents a hydrogen atom, a C1-3 alkyl group, a C1-3 alkylene group, a C1-2 acyl group, or an aldehyde group; and * represents a bond).

Description

technical field [0001] The invention relates to an adsorption separation material for collecting and recovering rare earth elements and a manufacturing method thereof. Background technique [0002] Rare earth elements are basic materials necessary for improving the performance of electronic products such as storage batteries, light emitting diodes, or magnets, and are used in a wide range of industrial fields. With regard to the supply status of rare earth elements, since the producing countries are very limited, the crisis of these resources has become prominent, the price is not stable, and the demand is expected to exceed the supply in the near future. For these reasons, many attempts have been made to reduce the usage of rare earth elements and to develop substitutes. At the same time, it is also required to recover REEs from low-quality natural mineral resources, or to regenerate REEs from in-process waste generated during product manufacturing or from waste such as el...

Claims

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Application Information

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IPC IPC(8): C22B59/00B01D15/00B01J20/26B01J20/34C22B3/24C22B7/00
CPCB01D15/00B01J20/34C22B3/24C22B7/00C22B59/00Y02P10/20Y02W30/84
Inventor 村木勇三樋口浩之西川原正也尾形刚志成田弘一田中幹也
Owner NITTO DENKO CORP
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