Anson Hits 99.6% Lithium Purity, Beating EV Battery Standard and LG Energy Spec
Anson exceeds EV battery-grade lithium carbonate standard at Green River
Anson Resources has produced 99.6% lithium carbonate from its Green River Lithium Project in Utah, exceeding the electric vehicle battery-grade industry standard of 99.5%. The product was manufactured from Green River lithium chloride eluate during flow sheet development at downstream processing contractor JordProxa’s South Africa facility. Purity was independently confirmed by SGS North America, which assayed approximately 500 grams of the sample. The result moves the project closer to commercial development and positions Green River to supply the North American EV battery supply chain.
The lithium carbonate was produced from brine extracted from the company’s Boysdaba #1 well using LiPro Direct Lithium Extraction (DLE) technology. JordProxa’s flow sheet improvements and process adaptations upgraded the product from the 99.4% grade previously achieved at Anson’s Lithium Innovation Center to the current 99.6% specification — a level that meets the product requirements of offtake partner LG Energy Solutions.
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What the milestone means for Anson
Exceeding the EV battery-grade threshold directly influences project economics, lithium recovery, operating costs and shareholder value. Product quality determines whether a lithium project can access the premium pricing tier of the battery supply chain or sits in the lower-margin industrial chemical market. For Green River, the 99.6% result provides what the company describes as “surety” that Anson can meet the product specification of offtake partner LG Energy Solutions.
Beyond the purity figure, the crystal structure matters. SEM imaging shows the Green River lithium carbonate exhibits a well-defined needle-like morphology, distinctly different from the agglomerated spherical morphology typically observed in crude or industrial-grade lithium carbonate. The more discrete elongated crystal structure is consistent with recrystallised, high-purity lithium carbonate and indicates reduced impurity inclusions and improved solid-liquid separation characteristics — both required for use in electric vehicle batteries.
Bruce Richardson, Executive Chairman and CEO
“Producing battery-grade lithium carbonate from Green River brine is a significant milestone because it demonstrates that the project can potentially supply lithium suitable for the EV battery market, moving the project closer to commercial development. The improvement of the grade to 99.6% using the downstream flowsheet developed by JordProxa provides us with the surety that Anson will be able to meet product specification of offtake partner LG Energy Solutions. Anson is continuing aim is to develop the most economic beneficial process that maximises shareholder returns.”
How Green River’s downstream processing works
The Green River Lithium Project operates as an integrated production chain: brine is extracted from wells, processed through Direct Lithium Extraction (DLE), then refined at a downstream facility to produce battery-grade lithium carbonate. The downstream processing circuit is described as “a critical component” of the overall project because it directly influences lithium recovery, operating costs, product quality and overall project economics.
Eluate is the lithium-rich solution produced by the DLE system. Think of it as the concentrated lithium stream that exits the extraction stage — still in liquid form, but now carrying a much higher lithium concentration than the original brine. This eluate is what gets shipped to the refinery for conversion into solid lithium carbonate.
The processing and development journey unfolded across five stages:
- Brine extracted from Boysdaba #1 well → eluate produced (ASX 28 March 2025).
- Eluate shipped to Anson’s Lithium Innovation Center for “polishing” — the removal of remaining impurities (ASX 9 April 2025).
- Lithium Innovation Center produced 99.4% lithium carbonate using in-house equipment (ASX 9 February 2026).
- 12 totes of lithium chloride sent to JordProxa in South Africa for test work and flow sheet design.
- Flow sheet improvements upgraded the product to 99.6% (current announcement).
This is a progression — 99.4% to 99.6% — not a first-time achievement. The milestone demonstrates Anson’s ability to consistently supply battery-grade lithium, a key requirement for securing offtake agreements and financing.
Data snapshot — purity vs the benchmark
| Producer / Stage | Lithium carbonate grade | EV battery-grade standard | Meets / Exceeds standard | Verified by |
|---|---|---|---|---|
| Lithium Innovation Center (in-house) | 99.4% | 99.5% | Below | Anson |
| JordProxa flow sheet | 99.6% | 99.5% | Exceeds | SGS North America |
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What happens next
The flow sheet design and engineering work being conducted by JordProxa is expected to be completed by the end of the year (2026). This work feeds into the broader Definitive Engineering Study, which is expected to be completed in Q1 2027 (ASX 31 July 2026).
JordProxa has been engaged since June 2025. Engineering has progressed from concept design through Scoping Study engineering and into Front-End Engineering Design (FEED). The strategic ambition is to position Green River as a competitive supplier to the North American battery supply chain and maximise shareholder value.
Key upcoming milestones:
- End of 2026: JordProxa flow sheet design and engineering work completion
- Q1 2027: Definitive Engineering Study completion
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