Monolithic Extraction Channels for Stable Metal Purification
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Solution Overview
Problem
Existing metal separation and purification methods, particularly in platinum group metals (PGMs) and battery materials, face issues such as degradation of solid phase extractants due to aggressive chemicals, instability with varying eluent concentrations, long elution cycles, broad elution bands, and high dilution of products, which hinder industrial scalability and efficiency.
Innovation Solution
The use of a monolithic solid phase body with functionalized channels for both solid-phase and liquid-liquid extraction methods, allowing for stable operation with aggressive chemicals, optimized flow rates, reduced pressure drops, and controlled droplet sizes to enhance separation and purification efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional solid phase extractants are used with aggressive chemicals for metal separation, then metal separation efficiency is improved, but the extractant degrades and deactivates
Solution Approach 1:
The patent changes the chemical parameters of the extractant by using polymer-supported extractants with modified functional groups that maintain extraction efficiency while resisting degradation from aggressive chemicals like concentrated halide eluents and inorganic acids
Solution Approach 2:
The patent employs composite material structures where extractant molecules are supported on polymer matrices or solid phases, creating a composite system that combines the extraction capability of the functional group with the structural stability of the polymer support, thereby improving reliability under harsh conditions
2Measurement precision
If eluents with widely different concentrations are used for metal elution, then separation precision is improved, but the solid phase extractant media becomes unstable due to expansion or contraction
Solution Approach 1:
The patent modifies the physical parameters of the extractant media by using cross-linked polymer structures that maintain constant volume and structural integrity across a wide range of eluent concentrations, preventing the expansion and contraction that occurs with traditional media
Solution Approach 2:
The patent employs disposable solid phase cartridges containing pre-packed polymer-supported extractants that can withstand aggressive elution conditions without degradation, eliminating the need for media regeneration and ensuring consistent performance throughout their service life
3Measurement precision
If conventional packed column methods are used for metal elution, then separation capability is maintained, but elution cycle time increases
Solution Approach 1:
The patent segments the elution process into optimized stages using pre-packed cartridges with specific extractant configurations that enable faster mass transfer and reduced equilibrium times, thereby shortening overall cycle time while maintaining separation precision
Solution Approach 2:
The patent employs dynamic flow rate optimization through controlled elution protocols that adjust flow rates based on the specific metal species and their retention characteristics, maximizing throughput without compromising separation quality
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
This approach improves metal separation and purification by increasing stability, reducing cycle times, enhancing concentration of products, and minimizing losses, thus improving the economic viability and efficiency of industrial processes.
Implementation Method 1
The solid phase extractant material is in the form of a powder, granules, or beads and is packed into a column through which the feed solution is passed. A porous frit 6 is provided to hold the solid phase extractant material in place. Target metal containing species are adsorbed onto the solid phase extractant material 4 while other metal species remain in solution.
Implementation Method 2
In a liquid-liquid extraction technique the feed solution is mixed with an immiscible liquid extractant in which one or more metal containing species preferentially dissolve.
Data Source
AI summary
A method for separating at least two metals from each other in a metal refining process, the method comprising: injecting a feed solution comprising the metals into a column or flow pipe comprising a monolithic solid body having a plurality of channels; and flowing the feed solution through the plurality of channels in the monolithic solid body to separate the metals.