In a strategic move poised to significantly advance the development of its Phalaborwa rare earths project in South Africa, Rainbow Rare Earths announced on September 25, 2026, the signing of a memorandum of understanding (MoU) with Neo Performance Materials. This partnership is a pivotal step for Rainbow, securing both critical technical expertise and a substantial offtake commitment from a global leader in rare earth separation and processing. The agreement underscores the mining industry's escalating efforts to diversify and secure the supply chains for these indispensable elements, crucial for the energy transition and advanced technologies.

Strategic Partnership and Technical Collaboration

The core of the MoU centers on Neo Performance Materials’ role in providing essential technical support and design input for Phalaborwa’s final solvent extraction (SX) separation circuit. Solvent extraction is a highly specialized and complex process vital for separating individual rare earth elements from a mixed concentrate to achieve the purity levels required for various industrial applications. Neo’s involvement is particularly significant as it will leverage its proprietary SX technology, a testament to its long-standing expertise and operational experience across multiple commercial facilities in rare earth separation.

This collaboration is designed to ensure the Phalaborwa project can efficiently produce high-purity rare earth oxides. Specifically, the planned circuit is expected to yield separated neodymium-praseodymium (NdPr) oxide at more than 99% purity. NdPr is a critical component in the manufacturing of permanent magnets, which are essential for electric vehicles (EVs), wind turbines, and a wide array of advanced electronics. Beyond NdPr, the circuit will also produce a mixed SEG+ heavy rare earth carbonate, containing valuable elements such as dysprosium (Dy), terbium (Tb), and other heavy rare earth elements (HREEs). This mixed concentrate will then be sent to Neo’s facilities for further separation, maximizing the value extraction from the Phalaborwa resource.

Rainbow Rare Earths emphasized that Neo was selected after a rigorous competitive process, which included thorough technical due diligence on the Phalaborwa project. This rigorous selection process highlights the importance of choosing a partner with proven capabilities and a deep understanding of the intricacies of rare earth separation, a field known for its technical challenges.

Product Offtake and Commercial Terms

A crucial aspect of the MoU is the guaranteed offtake agreement, which provides Rainbow Rare Earths with significant market certainty for its future production. Under the terms of the MoU, Neo Performance Materials will receive rights to:

  • 40% of annual separated neodymium-praseodymium oxide output. This commitment for NdPr oxide, a highly sought-after light rare earth, provides a stable market for a substantial portion of Rainbow’s primary product.
  • 65% of annual mixed SEG+ carbonate production. This includes the heavy rare earth elements dysprosium, terbium, and yttrium, which are critical for high-performance magnets and specialized alloys, particularly in applications requiring high thermal stability.

The pricing for these crucial materials will be established on arms-length commercial terms, referencing relevant international rare earth price indices. This mechanism ensures that pricing remains transparent and reflective of global market dynamics, offering fair value for both parties. Furthermore, the MoU explores a potential toll treatment arrangement for the remaining SEG+ production. This innovative approach would enable Rainbow Rare Earths to market the balance of its separated dysprosium, terbium, and yttrium, providing additional revenue streams and enhancing its market flexibility for these strategic heavy rare earths.

Phalaborwa Project: A Waste-to-Value Endeavor

The Phalaborwa project distinguishes itself within the rare earth landscape through its unique approach to resource extraction. Unlike traditional hard rock mining operations, Phalaborwa aims to recover rare earth elements from phosphogypsum waste stacks, a byproduct of historic phosphate mining operations. This waste-to-value proposition carries significant environmental and economic advantages, transforming what would otherwise be a liability into a valuable resource while simultaneously addressing a long-standing environmental challenge.

George Bennett, CEO of Rainbow Rare Earths, underscored the significance of this partnership, stating,

“Finalising our technology partner for the SX separation process was the remaining step required to complete the definition of our process to extract REEs from phosphogypsum waste. We are delighted that Neo has agreed to partner with us – their deep understanding and experience in rare earth separation and magnet materials is invaluable.”

This statement highlights the critical role of Neo's technology in de-risking the process flow sheet and confirming the viability of extracting rare earths from this unconventional source. The selection of Neo, known for its expertise in complex separation processes, validates Rainbow's chosen metallurgical pathway and reinforces investor confidence in the project's technical feasibility.

Advancing Project Development and Milestones

The MoU with Neo Performance Materials arrives at a crucial juncture for the Phalaborwa project, aligning with key development milestones. Technical test work utilizing Rainbow’s high-grade rare earth solution is currently underway at Neo’s facilities in Estonia. This initial test work is foundational, providing critical data for optimizing the SX circuit design and validating the process parameters.

Following the successful completion of the work in Estonia, Neo is slated to assist in running a confirmatory integrated pilot-scale SX plant in Johannesburg, South Africa. This pilot plant operation will be instrumental in demonstrating the process at a larger scale, generating comprehensive engineering data, and providing definitive de-risking for the subsequent stages of project development. The results from this pilot program will feed directly into the Definitive Feasibility Study (DFS), which is currently scheduled for completion in the first half of 2027.

Prior to the DFS, Rainbow Rare Earths plans to publish a Pre-Feasibility Study (PFS) in the fourth quarter of 2026. This PFS will incorporate the initial SX test work results and provide an interim update on Phalaborwa’s economics, building upon an earlier Interim Study published in December 2024. The company stated that the PFS is specifically designed to define the final product, process, and waste streams with sufficient certainty to advance critical project financing and permitting workstreams within the broader development timeline. This sequential study approach is standard in the mining industry, progressively refining economic and technical parameters to reduce risk for investors and regulatory bodies.

Market Context and Industry Implications

The rare earth sector continues to be a focal point for global industries and governments due to the strategic importance of these elements. Neodymium and praseodymium are indispensable for the permanent magnets powering electric vehicles, wind turbines, and robotics – key technologies underpinning the global energy transition. Dysprosium and terbium, as heavy rare earths, are equally critical for enhancing the heat resistance and performance of these magnets, especially in demanding applications. The global demand for these elements is projected to surge in the coming decades, creating a pressing need for new, diversified, and sustainable supply sources.

China has historically dominated the rare earth supply chain, from mining to processing and magnet manufacturing. This concentration has spurred significant efforts in Western nations to establish independent and resilient supply chains. The Phalaborwa project, located in South Africa, represents a promising new non-Chinese source. Its waste-to-value approach not only offers a sustainable production model but also aligns with evolving environmental, social, and governance (ESG) standards increasingly demanded by investors and end-users.

This partnership between Rainbow Rare Earths and Neo Performance Materials is therefore not merely a corporate transaction; it is a significant step towards bolstering critical mineral security and fostering a more balanced global supply network. By combining a unique resource with proven, advanced separation technology, the project stands to contribute meaningfully to the growing demand for magnet materials and other specialized rare earth applications.

Future Outlook and Next Steps

With the MoU now in place, Rainbow Rare Earths and Neo Performance Materials are actively progressing towards finalizing binding long-form agreements. The successful continuation of technical test work in Estonia and the subsequent pilot plant operation in Johannesburg will be critical determinants of the project’s advancement. Positive results from these stages will provide the necessary confidence for definitive investment decisions and secure the required project financing.

The Phalaborwa project has the potential to become a significant, environmentally responsible producer of high-purity rare earth oxides, contributing vital materials to the burgeoning green economy. For investors and industry professionals, this partnership signals a de-risking of the project’s technical aspects and a clear pathway to market, making Phalaborwa a project to watch closely as it moves towards a definitive feasibility study and, ultimately, production.