Highlights
- China controls approximately 91% of global rare earth separation capacity, which is the critical refining step that transforms ore into high-purity materials for electric vehicles (EVs), defense, and electronics.
- Separating actinides (thorium, uranium) from lanthanides is extremely difficult due to nearly identical chemistry, requiring specialized expertise that remains concentrated in few hands.
- Outside of China, only Lynas and MP Materials operate at a meaningful scale today, while firms like Ucore, Phoenix Tailings, and REEtec are racing to build Western separation capacity.
Rare earth elements (REEs) power modern lifeโEV motors, wind turbines, precision missiles, and the tiny components inside everyday electronics. Yet the supply chainโs most consequential step isnโt mining. Itโs separation chemistryโthe messy, high-skill work of turning mixed concentrates into high-purity oxides and metals.
When actinides (including thorium/uranium in some ore streams, and minor actinides like americium/curium in spent nuclear fuel) ride along with rare earths, the stakes rise fast: contamination becomes a regulatory and reputational problem, and the chemistry becomes harder.
This is also why Chinaโs dominance matters. China doesnโt just mine; it dominates separation and refining, with the IEA estimating about 91% of global separation/refining capacity. That concentration means pricing power, leverage, and a vulnerability for everyone else.
Table of Contents
Why are actinides hard to peel away
Actinides and lanthanides (the REE family) are chemical look-alikes. Many exist in the same charge state (often +3) and have similar ionic radii. In practical terms, they behave similarly in acids, in extractants, and on many sorbents. Separating them isnโt like filtering sand from gravel. Itโs more like separating two nearly identical dyes dissolved in the same glass of waterโpossible, but only with a lot of stages, careful conditions, and hard-earned expertise.
In nuclear fuel recycling, that difficulty becomes famous: separating โminor actinidesโ from lanthanides is a long-running technical challenge that still lives largely in national labs and pilot-scale demonstrations rather than routine commercial deployment.
Outside of China, this remains a challenge to do at scale, and even in China, only a few players operate at scale.
Why investors and policymakers should care
1) Electronics and magnet-grade purity.
Rare earth ores such as monazite can contain thorium/uranium. If you canโt remove them reliably, you canโt produce consistentlyโcleanโ product streamsโespecially in tightly regulated jurisdictions.
2) Nuclear back-end strategy.
In spent fuel, lanthanides and actinides get entangled. Pulling them apart is a prerequisite for advanced recycling and transmutation concepts, and it shapes long-term waste burdens.
3) Geopolitics and industrial resilience.
If one country controls the โrefinery brainโโthe plants, the solvent-extraction know-how, the reagent supply chain, the environmental toleranceโthen everyone else is exposed. Reuters and other reporting continue to highlight the G7's urgency to reduce reliance on China for critical mineral processing.
The core toolbox: how separation actually happens
Solvent extraction (SX): the industrial workhorse.
This is the backbone of rare earth separation globally. An aqueous solution is contacted with an organic solvent containing selective extractants. Metals partition back and forth through repeated contacts. For actinide/lanthanide splits, classical and emerging flowsheets (e.g., TALSPEAK-type concepts and ALSEP-type concepts in nuclear R&D) use subtle differences in complexation to push actinides into one stream and lanthanides into another. The catch: selectivity per stage can be modest, so scale often means many stages.
Ion exchange/chromatography: selective โcolumnsโ instead of tank farms.
Resins can preferentially bind one family of ions under the right chemistry. This approach is attractive because it can reduce footprint and potentially improve control, and itโs also increasingly relevant in next-gen rare earth refining strategies.
Solid-phase adsorbents: engineered โsponges.โ
Functionalized materials (silica gels, nanocomposites, ligand-coated sorbents) can bind actinides more stronglyโespecially when tuned to pH and anion conditions. Most of this remains earlier-stage, but it points toward modularity.
Pyro / molten-salt electrochemistry: a different path.
High-temperature molten salts and electrolysis can separate metals by electrochemical potential. In nuclear circles, pyroprocessing is a known concept; in rare earth circles, firms are exploring electro-metallization routes to get to metals with fewer conventional SX steps.
Who claims scaleโor is building it?
Outside China, the โat-scaleโ club is still small, but itโs growing:
- MP Materials (U.S.): Mountain Pass has restarted U.S. midstream production; MP reported ~1,300 metric tons of NdPr oxide in 2024.
- Lynas (Australia/Malaysia; expanding): Lynas remains the largest non-China separator and is pursuing expanded heavy-REE separation capacity in Malaysiaโreported as up to 5,000 tpa of heavy rare earth feedstock for the new facility.
- Ucore (U.S./Canada): Ucore positions RapidSX as a faster, smaller-footprint SX variant and describes staged Louisiana output, scaling from 2,000 tpa to 5,000 tpa, with potential expansion.
- REEtec (Norway; Nordic chain with LKAB): REEtec promotes a more sustainable separation approach and has an announced industrial partnership pathway with LKAB to build a Nordic value chain.
- Phoenix Tailings (U.S.): Phoenix describes a route that includes molten-salt electrochemistry to produce rare earth metals, supported by public-facing technical narratives (including ARPA-E). ย Phoenix is an early mover with a credible federal R&D signal.
- ReElement Technologies (U.S.): focuses on recovering/refining REEs from recycled electronics and other feeds, positioning modular processing as part of the answer. ย The group recently secured a significant private equity deal.
- Mkango Resources (Canada) is actively developing refining capabilities as part of its integrated "mine, refine, recycle" strategy for rare earths, with plans for a separation plant in Poland (Puลawy) and recycling operations in the UK/Germany, alongside its Songwe Hill mine in Malawi.
- Energy Fuels,ย given their expertise in uranium processing, gives them some advantage at least today.
Rare Earth Exchanges maintains the rare earth element processing rankings, which include the players above and others such as Carester (likely will emerge as European leader) in France, Solvay in Belgium, Saskatchewan Research Council (Canada), Iluka Resources (Australia), and ย Australia's Nuclear Science and Technology Organization recently announced the building out of a processing facility.
Outside China, only a small number operate at a meaningful scale todayโLynas clearly is on its way, and MP is developing U.S. separation capacityโwhile several others are in commissioning or scale-up mode. Again, specifically for Actinides Energy Fuels, at the present moment, it could be most proficient based on its background.
The real strategic goal: democratize capability
Investors often talk about โmine-to-magnet.โ But the hard moat is frequently separation methods and talent, not ore bodies (although finding a reliable, sustained heavy feedstock is no trivial task). Resilience improves when separation know-how, equipment, and permitting pathways spread across multiple allied jurisdictionsโso markets arenโt hostage to a single refining system.
Thatโs why policy should target more than mines: build midstream capacity, train specialized chemists and operators, secure reagent supply chains, and create permitting frameworks that can handle radioactive byproducts responsibly. If the West wants a real rare earth โexchangeโthat functions like a marketโnot a dependencyโthen separation must become widely replicable, not artisanal.
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Here’s a concise, powerful response for the Rare Earth Exchanges article:
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**Australia’s ANSTO Advantage: The Overlooked Actinide Separation Leader**
Your article correctly identifies actinide/lanthanide separation as the critical bottleneck outside China’s 91% refining dominance. However, one strategic capability deserves greater prominence: Australia’s Nuclear Science and Technology Organisation (ANSTO).
ANSTO’s decades of nuclear expertise translate directly into actinide separation proficiencyโthe specialized chemistry that stymies most Western rare earth projects facing thorium/uranium-bearing ores like monazite. Australia’s heavy mineral sands contain approximately 364,000 tonnes of thorium, and deposits including Nolans Bore and Dubbo carry both rare earths and radioactive byproducts that require nuclear-grade handling capabilities.
ANSTO’s new pilot-scale rare earth processing facility at Lucas Heights (operational Q2 2026) provides common-user infrastructure specifically designed for clay-hosted deposits requiring actinide separation. This government-backed capability accelerates project development by six months and de-risks commercialization for Australia’s emerging rare earth sectorโaddressing the “permitting frameworks that can handle radioactive byproducts responsibly” you correctly identify as essential.
Combined with Lynas’s proven commercial-scale separation in Malaysia (the only Western operator processing heavy rare earths at industrial scale) and Australian Strategic Materials’ Korean facility now shipping commercial volumes of terbium, dysprosium, and NdPr metal to defense customers, Australia has assembled unique actinide separation expertise rivalingโand in some aspects exceedingโMP Materials’ U.S. capabilities.
The real moat isn’t just separation chemistry. It’s separation chemistry combined with nuclear regulatory frameworks and operational experience handling radioactive byproducts. ANSTO represents 70+ years of nuclear science infrastructure that cannot be quickly replicated in jurisdictions lacking similar institutional knowledge.
When you write “democratize capability,” Australia’s ANSTO-Lynas-ASM ecosystem demonstrates what that looks like in practice: government research infrastructure (ANSTO), large-scale commercial production (Lynas), and emerging specialty metals capability (ASM)โall leveraging actinide separation expertise as competitive advantage.
Western rare earth resilience requires more than mines. It requires nuclear-competent separation infrastructure. Australia has it. Most other jurisdictions are still building it.