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| Aclara |
Aclara HREE separation plant plans in Louisiana have gained a significant boost after the state approved an estimated $21mn property tax exemption for the Canadian rare earth developer. The incentive supports Aclara’s effort to build US separation capacity for strategically important heavy rare earth elements.
Aclara HREE separation plant development is aimed at converting mixed rare earth carbonates from Chile and Brazil into separated oxides. Planned products include dysprosium, terbium, yttrium, gadolinium and samarium, alongside neodymium-praseodymium.
Aclara HREE separation plant capacity is particularly important because heavy rare earth separation remains one of the most concentrated parts of the global supply chain. Dysprosium and terbium are critical for high-performance permanent magnets used in defence, aerospace, electric vehicles and industrial motors.
The company aims to break ground in the fourth quarter of 2026 while continuing engineering, permitting and financing work.
Tax Relief Strengthens Louisiana Project Economics
Louisiana approved an 80% exemption from ad valorem property taxes under the state's Industrial Tax Exemption Program. The initial benefit will run for five years.
Aclara expects the exemption to reduce property tax costs by around $4.2mn annually, equivalent to $20.8mn over the initial period. The incentive can also be renewed for another five years.
This support improves the economics of a project that must compete with established Chinese rare earth separation capacity. Heavy rare earth processing requires complex chemistry, specialised equipment and tight product quality control.
The planned facility will have annual production targets of 1,131t of neodymium-praseodymium, 148t of dysprosium and 25t of terbium.
Those heavy rare earth volumes are small compared with bulk commodities but strategically meaningful. Dysprosium and terbium are used in relatively small quantities to improve permanent magnet performance at elevated temperatures.
This makes even modest new western capacity important for defence, automotive and advanced manufacturing customers seeking diversified supply.
Chile and Brazil Feedstocks Link to US Processing
Aclara plans to feed the Louisiana plant with mixed rare earth carbonates produced from its ionic clay resources in South America.
The company’s upstream portfolio includes the Carina project in Brazil and the Penco project in Chile. This creates a potential supply chain linking Latin American mineral resources with downstream separation in the US.
That structure is strategically important. The US needs more rare earth separation capacity, but domestic processing facilities also need reliable feedstock sources outside China.
Aclara’s model addresses both sides by combining South American ionic clay resources with a US-based refining platform.
However, the company still faces execution risk. Engineering, permitting, financing and construction must all advance before the planned plant can move into production.
If successful, the Louisiana facility could become an important source of separated heavy rare earth oxides and strengthen the emerging non-China magnet materials supply chain.
The Metalnomist Commentary
Aclara’s tax incentive shows that US rare earth policy is increasingly moving from mine support toward midstream separation. The real strategic value lies in connecting South American HREE resources with US processing capacity for dysprosium and terbium.

















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