Although rare earth metals remain largely unfamiliar to the general populace, they play crucial roles in a vast array of products. Elements such as neodymium, praseodymium, and cerium are not uncommon in nature, but their availability is limited to specific regions, making their refinement into usable forms quite difficult. Their distinctive electrical and magnetic characteristics render them indispensable for electronic components, including hard drives and headphones, as well as for use as contrast agents in MRI and CT imaging. Prices for these materials can reach tens of thousands of dollars per metric ton.
In recent years, China has emerged as the leading processor of rare earth elements, leveraging them as strategic assets in trade tensions with the United States.
“Generally, the annual production of rare earth elements ranges from 330,000 to 350,000 tons. Historically, the U.S. contributes very little to this figure,” remarked Nathan Ratledge, co-founder and CEO of Alta Resource Technologies.
The U.S. Department of Defense is sufficiently concerned to have identified securing these elements as a critical component of its industrial strategy.
“China has the capability to easily weaponize its control over this vital mineral supply,” Ratledge cautioned. The implications go beyond military needs. “They’ve already implemented export restrictions on materials that are essential to many valuable companies like Nvidia and Apple.”
The U.S. currently operates just one rare earth mine in California, which has faced numerous challenges. However, Ratledge highlighted an alternative source lurking in the substantial volumes of e-waste generated annually in the country.
Alta claims to have devised a more efficient method for extracting rare earth elements from low-quality sources than traditional refinement processes, which often involve toxic chemicals and numerous steps. Instead, the company uses specially engineered proteins that bond with rare earth elements, whether sourced from natural ore or electronic refuse.
“Chemicals struggle to distinguish between adjacent elements on the periodic table,” Ratledge explained. “When dealing with simpler systems, chemicals can often prevail due to their cost-effectiveness. In more complex situations, biological methods can excel because of their selectivity. The challenge lies in effectively harnessing biology.”
Alta’s proteins, affixed to a resin, are employed in a column system that allows solutions containing rare earth elements to filter through. The proteins effectively capture these elements from the solution, and once saturated, the column is flushed to release the metals. Ratledge noted that the proteins have shown remarkable durability.
The company plans to establish a pilot-scale plant this year, approximately the size of a shipping container. Ratledge expressed optimism that Alta “has reasonable confidence” the federal government will provide funding support for at least part of this initiative.
To refine the technology and scale operations, Alta has successfully raised a seed funding round of $5.1 million, as disclosed exclusively to TechCrunch. The funding was led by DCVC and Voyager Ventures, with contributions from Orion Industrial Ventures, Overture, and WovenEarth Ventures. Additionally, the startup has secured approximately $1 million in grants from DARPA and the Colorado state government.
While Alta cannot immediately shift rare earth processing back to the U.S., Ratledge is hopeful that the company can produce enough materials to alleviate some concerns for the Pentagon.
“To mitigate some of the fundamental national security risks, it’s not about needing hundreds of thousands of tons. Even a few thousand tons would suffice. Meeting these critical needs for the U.S. government presents a near-term opportunity for us and similar companies,” he stated.
Compiled by Techarena.au.
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