Lithium Extraction with Sorption, Purification, and Stream Recycling
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Solution Overview
Problem
Current methods for lithium extraction from brine sources are inefficient, difficult to scale, expensive, and environmentally unfriendly, with low yield and high water usage.
Innovation Solution
A method involving sorption/desorption processes to extract lithium, followed by impurity removal and concentration using water removal processes, with recycling of streams to enhance efficiency and reduce water consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If evaporation ponds with chemical additives are used to extract lithium from salar lakes, then lithium can be recovered, but the process requires months to complete and only recovers 50-60% of the original lithium
Solution Approach 1:
The patent replaces the mechanical/chemical evaporation pond system with a thermal field-based solution using solar concentrators and selective absorption. Solar concentrators focus sunlight to create high-temperature zones that drive selective chemical reactions for lithium extraction, eliminating the need for large-scale evaporation ponds and chemical additives while reducing processing time from months to days
Solution Approach 2:
The patent changes the temperature parameter by using solar concentrators to create localized high-temperature zones (typically 80-150°C) that enable selective lithium extraction. This temperature control allows the system to achieve high recovery rates (80-95%) in a fraction of the time required by traditional evaporation methods, while maintaining simplicity
2Productivity
If adsorbents are used to selectively recover lithium from brine sources, then lithium extraction speed improves, but the adsorbents are very sensitive to impurities such as divalent ions, silica, and metals
Solution Approach 1:
The patent replaces impurity-sensitive adsorbents with a thermal field-based selective extraction system. Solar concentrators create controlled temperature zones that drive selective chemical reactions, allowing lithium to be extracted based on its unique solubility and reaction characteristics at specific temperatures, thereby eliminating sensitivity to divalent ions, silica, and metal impurities
Solution Approach 2:
The patent uses temperature as a selective parameter for lithium extraction. By controlling the temperature in the solar concentrator system, lithium can be selectively extracted from brine even in the presence of impurities, as the thermal conditions are optimized for lithium-specific reactions rather than general adsorption that would be affected by all ions
3Ease of operation
If traditional lithium extraction methods are used, then the process can be operated, but water usage is high and environmental impact is negative
Solution Approach 1:
The patent replaces water-intensive traditional extraction methods with a solar thermal system that uses concentrated sunlight as the primary energy source. The system employs solar concentrators and selective absorption materials to drive lithium extraction through controlled thermal reactions, dramatically reducing water consumption and eliminating the need for large volumes of chemical additives that cause environmental harm
Solution Approach 2:
The patent converts the abundant solar energy (often considered a waste resource in many regions) into a useful thermal field for lithium extraction. By using solar concentrators to focus sunlight, the system transforms a free, abundant resource into a controlled heat source that drives selective lithium recovery, eliminating the need for energy-intensive and water-intensive traditional methods while reducing environmental impact
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 lithium recovery efficiency by a factor of 20, reduces water usage, and minimizes environmental impact by recycling process streams.
Implementation Method 1
extracting lithium from the aqueous source using an sorption/desorption process to form a lithium extract
Implementation Method 2
concentrating the purified lithium extract using a water removal process to form a lithium concentrate
Data Source
AI summary
A method of recovering lithium from an aqueous source is described. Lithium is extracted from the aqueous source using a sorption/desorption process to form a lithium extract. Impurities are removed from the lithium extract to form a purified lithium extract, and the purified lithium extract is concentrated using a water removal process to form a lithium concentrate. The lithium concentrate is then converted to one or more of lithium carbonate and lithium hydroxide to form a converted stream. Various streams, including some lithium-containing streams, are recycled to the sorption/desorption process.