Ion Extraction Column With Sharp Interface Brine Stripping
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Solution Overview
Problem
Existing methods for extracting lithium and other valuable substances from brine, such as evaporating water from brine ponds, are inefficient and result in low recovery rates, with only about 45% of lithium being recovered.
Innovation Solution
A method and apparatus for directly extracting lithium and other substances from brine using a porous media bed with controlled liquid flow, where an extractant material absorbs target ions, followed by a stripping solution to separate and regenerate the extractant, maintaining a sharp interface between brine and stripping solution to minimize contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If evaporation ponds are used to extract lithium from brine, then lithium recovery is achieved, but the recovery rate is low (only about 45%) and the process is highly inefficient
Solution Approach 1:
The patent employs porous extraction media with controlled pore sizes and surface areas to enhance the absorption capacity for lithium ions. The porous structure provides extensive surface area for ion exchange while maintaining selective permeability, enabling higher extraction efficiency and recovery rates compared to traditional evaporation ponds.
Solution Approach 2:
The invention changes the physical and chemical parameters of the extraction process by using controlled liquid flow rates, optimized extractant compositions, and regulated contact times between brine and extraction media. These parameter optimizations maximize lithium uptake while minimizing losses, achieving recovery rates significantly higher than the 45% baseline.
2Speed
If evaporation mechanisms are used to accelerate water removal from brine, then extraction speed is improved, but significant amounts of energy are required
Solution Approach 1:
The patent utilizes hydraulic flow systems to drive brine through the porous extraction media at controlled rates. This hydraulic approach enables rapid processing without thermal energy input, replacing energy-intensive evaporation mechanisms with mechanically-driven fluid flow that achieves high extraction speeds with minimal energy consumption.
Solution Approach 2:
The invention replaces thermal/evaporative mechanisms with mechanical filtration and absorption processes. By using pressurized liquid flow through specially designed porous media, the system achieves rapid extraction without the energy-intensive heating and evaporation steps required by traditional methods.
3Ease of operation
If simple extraction techniques are used at remote locations, then operational simplicity is improved, but contamination control becomes more difficult
Solution Approach 1:
The patent divides the extraction system into modular, self-contained units that can be deployed at remote locations. Each module includes integrated filtration, absorption, and separation components that work together to maintain product purity. This segmentation allows operational simplicity through standardized modules while inherently controlling contamination through built-in separation barriers.
Solution Approach 2:
The invention introduces intermediary substances and processes, including selective extractants and filtration media, that act as barriers between the brine and the final product. These intermediaries capture impurities and protect the extracted lithium from contamination, enabling simple remote operations without compromising product purity.
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
Enhances the extraction efficiency by achieving higher recovery rates of target materials like lithium while reducing contamination, allowing for simpler extraction techniques at remote locations using mobile systems.
Implementation Method 1
an extractant material that ionically binds to a target material during an extraction process
Implementation Method 2
an extractant material absorbs target ions
Implementation Method 3
a stripping solution to separate and regenerate the extractant
Data Source
AI summary
Methods of the present disclosure may be referred to as direct material extraction. Brine may be moved into a media bed such that extractant materials in the media bed absorb ions of a target material without absorbing other materials included in the brine. Desired ion(s) may be transported into the extractant and be held there temporally based on ionic bonds that form between the desired ions and the extractant material. Apparatuses of the present disclosure may contain the extractant material, receive brine, and may receive a stripping solution such that desired materials are separated from other materials included in the brine. After the extractant material has absorbed the desired materials, a flow of stripping solution may be used to flush other materials out of an apparatus and then to flush the desired materials out of the extractant material.