Rare Earth Adsorbent Particles for High-Capacity, Mild-Acid Recovery
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Solution Overview
Problem
Existing adsorbent materials for rare earth elements have limitations in both adsorption capacity and efficient desorption, leading to suboptimal recovery processes.
Innovation Solution
Adsorbent particles comprising carrier particles made of organic polymers with an amino group-containing polymer and diglycolic acid residues bonded to the amino groups, allowing for high adsorption and efficient desorption of rare earth elements using acidic solutions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If existing adsorbent materials are used, then rare earth element adsorption can be achieved, but adsorption capacity is limited and desorption efficiency is poor
Solution Approach 1:
The invention uses a composite structure consisting of a carrier particle, an amino group-containing polymer layer, and diglycolic acid residues. This multi-component composite material combines the advantages of each component: the carrier provides structural support, the amino polymer provides binding sites, and the diglycolic acid residues provide selective adsorption capability for rare earth elements, achieving both high adsorption capacity and efficient desorption
Solution Approach 2:
The invention changes the chemical parameters of the adsorbent by introducing diglycolic acid residues onto the amino group-containing polymer. This chemical modification transforms the adsorption characteristics, enabling the material to not only adsorb rare earth elements with high capacity but also to release them efficiently through acid treatment, thus resolving the contradiction between adsorption capacity and desorption efficiency
2Productivity
If strong acid is used for desorption, then rare earth element recovery is improved, but environmental impact increases and material integrity may be compromised
Solution Approach 1:
The diglycolic acid residues on the amino polymer enable desorption to occur under milder acidic conditions compared to conventional adsorbents. The specific chemical structure of diglycolic acid groups allows them to bind and release rare earth elements at lower acid concentrations, reducing environmental harm while maintaining high desorption efficiency and preserving the adsorbent material structure for reuse
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The described adsorbent particles achieve a large adsorption capacity and high desorption efficiency of rare earth elements, even with weak acidic solutions, reducing environmental impact and maintaining material integrity.
Implementation Method 1
adsorbent particles which have a large adsorption amount of a rare earth element
Implementation Method 2
a diglycolic acid residue bonded to the amino group of the amino group-containing polymer
Implementation Method 3
from which the adsorbed rare earth element can be desorbed at a high proportion
Implementation Method 4
causing the rare earth element to be desorbed from the adsorbent particles by contacting with an acidic solution containing an acid
Data Source
AI summary
Disclosed are adsorbent particles each containing: a carrier particle containing an organic polymer; an amino group-containing polymer adhered to a surface of the carrier particle and including a constituent unit having an amino group; and a diglycolic acid residue bonded to the amino group of the amino group-containing polymer.