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Imperial says new Sc-REE extraction method has 'excellent' efficacy

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(Kitco News) - Imperial Mining Group (TSX VENTURE: IPG) announced today that it has developed an innovative process for extraction of scandium (Sc) and rare earth elements (REE) from its Crater Lake scandium mineralization as part of its current Phase 3 Hydrometallurgical Development Program. The company said that the results from this work show very high recovery of both Sc and REE for all mineralization types defined in diamond drilling on the property.

The two-stage hydrometallurgical extraction method entails a high-pressure caustic leach (HPC) followed by hydrochloric acid leach of the HPC residue. The company noted that the new method showed "remarkable" recovery of scandium and the rare earth elements from Imperial's Crater Lake Sc-REE mineralization, with scandium recovery to primary leach solution of 87% for MET01, and 84% for MET02 samples. The recovery of total rare earth element, including yttrium (TREE+Y) is 84%, from both MET01 and MET02 samples, Imperial added.

The high recoveries of Sc and TREE+Y from both samples show that the method has excellent efficacy in extracting Sc and REE from samples representing different mineralization types observed in drilling, the company explained.

Imperial said it is currently working to further optimize the process parameters with its hydrometallurgical development partners, MPlan-Dorfner Anzaplan GmbH, and is planning to apply for a patent for the new process.

Imperial is a Canadian mineral exploration and development company focused on the advancement of its technology metals projects in Québec.

M.Plan International is a joint venture between two internationally recognized consulting companies, Dorfner Anzaplan GmbH and Micon International, combining their expertise in global geological and mining consulting with analytics, processing and engineering with significant experience in the specialty minerals and metals sector.

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