RE: The rules of the game just changed22 Oct 2025 18:19
Post 2 of 2 – Chromatographic vs ‘Ionic Separation’
Following on from my first post — let’s settle this “ionic separation” nonsense. Pensana’s downstream partner, ReElement Technologies, is not using ionic or solvent extraction.
“Ionic separation” refers to the mining and leaching process used in southern China’s weathered clay deposits, where ammonium salts are flushed through the ore to dislodge ion-adsorbed rare earths. It’s a low-grade, environmentally damaging extraction method — not a refining or separation technology. Once you’ve produced a mixed rare earth concentrate, that stage is already over.
ReElement’s process is ligand-assisted chromatographic separation, which sits at the refining end of the chain. It uses a fixed-bed resin system — a solid phase that separates elements by retention time and affinity, much like a fractional distillation column in oil refining. There are no organic solvents, tailings ponds, or ionic leaching. The result is high-purity oxides suitable for magnet manufacture.
This isn’t theory — it’s already in operation at Noblesville, Indiana, and scaling rapidly at ReElement’s new Marion Supersite. As ReElement themselves state:
“Phase 1 of Marion capacity, designed for approximately 2,500–3,500 metric tons per annum of refined output, will utilize approximately 5-foot diameter columns – increased from the 18-inch diameter columns in Noblesville – showcasing the efficient modularization of the platform to rapidly increase capacity. Installation of Phase 1 is estimated to occupy approximately 40,000 square feet within the existing 400,000+ square-foot facility, leaving significant capacity for expansion and the co-location of complementary partner technologies. To date, ReElement has ordered, identified, or begun installation of more than 60% of the equipment required for Marion’s initial contracted growth phase. Once complete, the Supersite will provide large-scale refining capacity for magnet-grade rare earths, battery materials, antimony, and additional defense elements.”
That’s ligand-based chromatographic separation — modern, modular, clean, and U.S.-funded. Anyone still calling it “ionic” is confusing mining with refining.