Researchers at Idaho National Laboratory have demonstrated an electrophoretic separation platform capable of resolving all 14 lanthanides in a single laboratory pass of roughly 10 minutes, using inexpensive water-based ligands instead of the hundreds of organic-solvent stages required by conventional processing. Backed by the nine-laboratory METALLIC consortium and housed in INL's new 55,000-square-foot Critical Materials and Energy Systems Innovation Center, the technology represents a potential structural challenge to China's near-total dominance of rare earth midstream processing, the most durable chokepoint in Western supply chain buildout.
Introduction
A research team at Idaho National Laboratory has demonstrated something that the rare earth industry has struggled to achieve outside China for decades: the clean, rapid separation of all 14 non-radioactive lanthanides in a single continuous pass, completed in approximately 10 minutes. The platform, described by INL research scientist Dr. Chloe Tolbert in a July 9, 2026 Rare Earth Exchanges podcast, uses an electric field combined with inexpensive aqueous ligands, compounds chemically similar to citric acid, lactic acid, and acetic acid, to drive separation without the large volumes of harsh organic solvents on which the global industry currently depends.
The headline figure deserves immediate context. Conventional solvent extraction, the technology that underpins virtually all commercial rare earth separation today, can require 100 or more mixer-settler stages to resolve adjacent elements such as neodymium and praseodymium. A full commercial-scale circuit runs continuously for four to fifteen weeks per batch and costs between $200 million and $500 million to construct, before accounting for the broader integrated facility costs that can reach $1.5 billion to $2 billion. China has spent four decades building and refining that infrastructure. INL is now attempting to replace it entirely.
The timing is not coincidental. China currently separates and processes approximately 90 percent of the world's rare earth elements, controls roughly 94 percent of sintered permanent magnet production, and holds an estimated 81 percent of all rare-earth-related global patent families filed between 2014 and 2024. Beijing has simultaneously tightened its grip on the technology itself: a comprehensive ban on the export of rare earth extraction and separation technologies was imposed in 2023, followed by escalating waves of export controls through 2025 and into 2026. For Western governments racing to build independent supply chains, the midstream separation bottleneck has become the defining strategic problem, and incremental improvements to a technology China already dominates are increasingly seen as insufficient.
The Science: Electric Fields, Aqueous Ligands, and a 70-Micron Channel
Electrophoretic separation exploits differences in ionic transport properties, specifically the way that ions of slightly different size, charge, and coordination chemistry migrate at different velocities under an applied electric field. Rare earth elements are notoriously difficult to separate by conventional chemistry because all 14 lanthanides share the same +3 oxidation state and differ only subtly in ionic radius, a consequence of the lanthanide contraction. Solvent extraction exploits thermodynamic partitioning between aqueous and organic phases, and the tiny differences between adjacent lanthanides demand hundreds of equilibrium stages to accumulate into a usable separation. Electrophoretic methods, by contrast, leverage kinetic differences in ionic mobility, which can be amplified by carefully chosen complexing ligands.
The specific implementation described by Dr. Tolbert uses isotachophoresis (ITP) in a serpentine fused-silica microchannel measuring 70 micrometres wide by 70 micrometres tall by 33 centimetres long. All 14 non-radioactive lanthanides, from lanthanum through lutetium with the exclusion of promethium, are separated in under 10 minutes at voltages at or below 8.0 kilovolts, with limits of detection on the order of picomoles. The two-minute electrokinetic injection step at 2.0 kilovolts is included within that total time window. For a field accustomed to measuring separation cycles in weeks, the 10-minute figure represents a qualitative shift in what the chemistry allows.
The ligand selection is central to the performance. Dr. Tolbert and colleagues published a detailed investigation of fundamental interactions between rare earth elements and a series of carboxylate ligands in Separation and Purification Technology in August 2024, demonstrating that iminodiacetic acid (IDA) substantially enhances the electrophoretic separation of lanthanides by preferentially coordinating light versus heavy members of the series. The aqueous ligands used in the INL platform are inexpensive and environmentally benign, a sharp contrast to the D2EHPA and P507-type extractants that dominate Chinese separation flowsheets and for which China controls an estimated 50 to 90 percent of global production capacity depending on reagent type.
A parallel research thread at INL, published by Tolbert and co-author Eugene Engmann in Separation and Purification Technology in June 2026, explores magnetophoresis of trivalent lanthanide ions: measuring the motion of aqueous lanthanide droplets inside an immiscible fluid under the field of a neodymium-iron-boron permanent magnet to extract magnetic susceptibility data. While magnetophoresis is a distinct technique from electrophoresis, the two lines of work share a common intellectual framework, field-driven transport as an alternative to equilibrium chemistry, and both feed into INL's broader separations research programme.
From Microchannel to Market: The Scale-Up Challenge and the METALLIC Architecture
Robert V. Fox, who leads the Materials Separation and Analyses Department at INL, offered the most direct assessment of what the technology needs to become commercially relevant: "Successful chemistry is only the beginning. Researchers have to demonstrate that lab results can be achieved at commercially viable levels, and in the end industry has to embrace a process in order for it to be described as successful." Fox has also characterised the platform's commercial potential in strong terms, describing it as "a market disruptive technology for processing and refining REE mixtures from mined and recycled sources" that could help stabilise the rare earth supply chain by allowing interconversion between rare earth oxides and rare earth metallic forms.
The path from a 70-micrometre laboratory channel to a kilogram-per-day continuous-flow system is an engineering challenge of substantial complexity. INL is currently developing continuous-flow systems targeting that kilogram-per-day scale, but the METALLIC programme framework sets the next meaningful commercial milestone considerably higher: pilot facility development requires demonstration of sustained processing performance at 100 to 500 kilograms per day before a design can support the customer development and project financing needed for a full commercial plant.
METALLIC, which stands for Minerals to Materials Supply Chain Research Facility, is the institutional architecture within which INL's separation work sits. Led by the National Energy Technology Laboratory (NETL), the consortium brings together nine national laboratories and organises their work into four centres of expertise: Feedstock Beneficiation, Extraction and Separations, Refining, and Alloy Development and Advanced Manufacturing. INL serves as co-lead for the Feedstock Beneficiation Centre alongside Oak Ridge National Laboratory and Argonne National Laboratory, while Ames National Laboratory leads the Extraction and Separations Centre. The explicit mandate is to validate, improve, and help commercialise technologies developed by domestic entities, directly addressing the gap between laboratory-scale demonstrations and commercial viability that has historically prevented non-Chinese rare earth projects from achieving production status.
METALLIC has already begun pulling in real-world feedstocks. American Rare Earths was selected in March 2026 to supply material for the consortium, having delivered approximately five tonnes of allanite ore from its Cowboy State Mine test pit in December 2025. Ramaco Resources has executed a Cooperative Research and Development Agreement (CRADA) with NETL that specifically leverages the METALLIC infrastructure. Each industrial partnership generates processing data against actual mineralogy rather than synthetic reference materials, accelerating the translation of laboratory chemistry into conditions relevant to commercial-scale plant design.
The Critical Materials and Energy Systems Innovation Center: Integrating the Ecosystem
The physical home for INL's separations research is its newly dedicated Critical Materials and Energy Systems Innovation Center (CME SIC), a 55,000-square-foot facility in Idaho Falls that was formally dedicated on August 26, 2025. The centre was formerly known as the Center for Advanced Energy Studies and has been reoriented and expanded to bring mineral characterisation, separations science, pilot-scale processing, and industry collaboration together in one integrated building, a configuration found in very few facilities across the United States.
The CME SIC is designed to handle materials including natural uranium, thorium, cobalt, and lithium, capabilities that support INL's work across advanced nuclear reactors, grid-scale energy storage, and critical mineral supply chains simultaneously. Idaho State University is a formal partner in the centre, and ISU President Robert Wagner emphasised the dual economic and security rationale at the dedication ceremony: "Establishing a critical and strategic materials center positions Idaho as a national leader in critical materials research, driving innovation and economic opportunity across the region while building America's energy future and safeguarding national security."
The broader institutional network extends well beyond Idaho. INL's industry partnerships include a CRADA with US Critical Materials Corp. focused on developing cutting-edge separation technologies for rare earths and other critical minerals, with patents for new separation technologies anticipated before the end of the eight-month CRADA term. A separate agreement with Perpetua Resources, announced in December 2025, involves INL hosting, commissioning, and operating a modular pilot plant for antimony recovery, reflecting the laboratory's expansion into defence-critical minerals beyond the rare earth series. The laboratory also maintains academic partnerships with Colorado School of Mines and Arizona State University, adding materials science and process engineering expertise to the broader research ecosystem.
What sets the INL approach apart from a single-technology research programme is its systems integration. The laboratory explicitly combines chemistry, data science, robotics, and systems engineering across the supply chain from mining through recycling. Fox noted that INL's latest separation technologies "target the energy critical materials and span the entire supply chain from mining to recycle/recovery," a framing that places the electrophoretic platform not as a standalone discovery but as one component of a vertically integrated domestic processing capability.
The Leapfrog Argument: Why Replicating China Is the Wrong Strategy
Building on my analysis of the midstream separation bottleneck in earlier coverage of USA Rare Earth's Wheat Ridge hydromet plant and Lynas's first terbium production in Malaysia, it is worth being precise about what "leapfrogging" China actually means in this context, and why the distinction matters.
China's dominance in rare earth separation is not principally a function of resource ownership. The United States Geological Survey's February 2026 Mineral Commodity Summaries place China's reserves at 44 million tonnes of rare-earth-oxide equivalent, a significant figure but not an insurmountable one given known deposits in the United States, Australia, and elsewhere. What China actually controls is the process technology, the installed infrastructure, and increasingly the legal and administrative apparatus that makes replication difficult. Chinese companies account for more than 80 percent of the world's rare earth separation extractants by consumption and more than 90 percent of deployed solvent extraction infrastructure. The 2023 ban on the export of rare earth extraction and separation technologies then closed the door on the most direct form of technology transfer.
This is why Dr. Tolbert's closing message at the Rare Earth Exchanges podcast, as characterised by Rare Earth Exchanges editors, carries strategic weight beyond the laboratory: incremental improvements to legacy technologies will not be enough. A Western rare earth industry built on conventional solvent extraction faces not just cost disadvantages of 5 to 7 times Chinese production costs, and not just the regulatory burden of permitting plants that require 3 to 5 years of environmental review, but a structural dependency on extractant supply chains, engineering talent pools, and intellectual property that China has systematically accumulated over four decades and now actively controls through export licensing and technology classification regimes.
Ames National Laboratory's parallel development of Laser-Assisted Separation of Rare Earth Metals (LAS-REM) for end-of-life magnet processing, and the contemporaneous emergence of atomic-channel separation techniques reported in a July 21, 2026 study, suggest that the electrophoretic approach is not an isolated research effort but part of a broader contemporaneous wave of alternative separation science reaching demonstrable milestones at roughly the same time. The DOE's May 2026 announcement of more than $45 million in support for domestic critical mineral supply chains provides the funding architecture connecting these threads. Savannah River National Laboratory is separately developing industrially viable processes to convert separated rare earth feedstock into high-purity metallic form, addressing the refining stage immediately downstream of separation. Taken together, these programmes represent a deliberate attempt to construct a full non-Chinese processing column from ore to metal using chemistry and engineering approaches that China's existing infrastructure cannot easily replicate in reverse.
Market Context: A $14 Billion Industry Built on a Single Process Technology
The global rare earth elements market was valued at approximately $14 billion in 2025 and is projected to reach $41 billion by 2034, a compound annual growth rate of roughly 12 percent driven by permanent magnets for electric vehicles and wind turbines, defence electronics, and increasingly, as my July 2026 analysis of the Sprott Asset Management report examined in depth, artificial intelligence infrastructure. Rare earth magnets are embedded throughout the cooling, storage, and communication systems of hyperscale data centres, adding a third structural demand driver to electrification and defence.
Against that demand trajectory, the entire non-Chinese separation landscape as of early 2026 consists of a small number of facilities: Lynas's LAMP facility in Malaysia at approximately 7,000 tonnes per year of neodymium-praseodymium equivalent; MP Materials, which separated 2,599 metric tonnes in 2025 after doubling output from 2024; Energy Fuels' White Mesa mill at approximately 1,000 tonnes per year; and Neo Performance Materials' plant in Estonia, the only separation facility operating in Europe. China's export controls on terbium, dysprosium, and yttrium, the heavy rare earths most critical to high-performance magnet grades, have exposed the particular fragility of the heavy rare earth separation gap, a vulnerability that Lynas's June 2025 first terbium oxide production in Malaysia, covered in this publication, only partially addresses at current output levels.
Conventional solvent extraction plants take years to permit, cost hundreds of millions of dollars for the separation circuit alone, and depend on extractant chemistries that China controls. An electrophoretic platform that can be built without those extractants, operated with aqueous reagents available from standard chemical suppliers, and potentially scaled in modular continuous-flow units rather than in vast mixer-settler halls, addresses the economics of the Western separation problem from a fundamentally different direction. The market does not yet have a commercial price for electrophoretically separated lanthanides; the technology is not yet at the stage where that price can be calculated. But the structural logic of a separation method that compresses weeks of processing into minutes, eliminates organic solvent consumption, and does not depend on Chinese-controlled reagent supply chains is commercially significant independent of any specific cost figure.
Conclusion: Laboratory Promise and the Long Road to Commercial Scale
The honest assessment of INL's electrophoretic platform is that it sits at the most exciting and most precarious point in the technology development lifecycle: compelling laboratory results that have not yet been tested at the scale and throughput conditions that matter to industry. The microchannel results are genuine, the ligand chemistry is peer-reviewed and published, and the METALLIC consortium provides an institutional pathway toward scale-up that did not exist for earlier generations of alternative separation research. But continuous-flow kilogram-per-day systems have not yet been demonstrated, and the gap between that milestone and the 100-to-500-kilogram-per-day pilot scale needed to attract project financing remains substantial.
Fox's caution that "industry has to embrace a process in order for it to be described as successful" is the right frame for interpreting the current state of the technology. INL's combination of the CME SIC facility, the METALLIC consortium, the CRADA with US Critical Materials, and the academic partnerships with Idaho State University, Colorado School of Mines, and Arizona State University represents a more structured commercialisation pathway than most national laboratory technologies enjoy. The question is whether that pathway can compress the typical decade-plus timeline from laboratory chemistry to commercial production into something closer to the urgency that Chinese export controls and accelerating demand are creating.
What the INL electrophoretic platform offers, at minimum, is proof that the underlying physics permits a fundamentally different approach to lanthanide separation: one that uses electrons and common organic acids rather than thousands of litres of hazardous extractants, and that resolves all 14 lanthanides in 10 minutes rather than across weeks of continuous solvent cycling. Whether that becomes a commercial separator in Idaho Falls or a licensed technology adopted by refiners in Texas, Europe, or Australia, the development confirms that the rare earth processing landscape of 2030 need not look like the one China built between 1980 and 2020. The strategic window to build something different is open; INL is among those working hardest to step through it.