Imperial Mining Files for US and Canadian Patents for Its Scandium and Rare Earth Metallurgical Extraction Process
February 02 2023 - 7:30AM
Imperial Mining Group Ltd. ("Imperial")
(
TSX VENTURE: IPG)
(OTCQB: IMPNF)
is pleased to announce the filling of patent applications for its
two-stage hydrometallurgical methods and processes for the
extraction of scandium (Sc) and rare earth elements (REE) from
Crater Lake project mineralization.
The patent titled “HIGH PRESSURE CAUSTIC LEACH
METHODS AND PROCESSES FOR RECOVERY OF SCANDIUM AND RARE-EARTH
OXIDES” was filed on December 6, 2022, with the United States
Patent and Trademark Office (USPTO, Application Number:
18/062,318), and Canada Intellectual Property Office (CIPO,
Application Number 3,183,459). The US patent application has been
assigned to an Examiner, who will conduct a search for relevant
references to the invention and will examine the application
according to its filing date. IPG will file a Request for
Examination with the CIPO after the successful examination by USPTO
and within four years of the filing date.
IPG is also pleased to provide an update on the
Crater Lake Scandium Project flowsheet development program which
commenced in early 2022 at SGS Canada, Quebec City and Peterborough
and is partially financed from a $245,355 grant from the Quebec
Ministry of Energy and Natural Resources (see Imperial Mining Press
Release - FEB 8, 2022).
The flowsheet development program was focused on
further optimization of the mineral processing flowsheet by
rejecting olivine, a non-Sc-REE-bearing mineral from the mineral
concentrate and processing of the olivine-depleted mineral
concentrate through the patent-pending high-pressure caustic leach
process for recovery of Sc and REE. During the flowsheet
development program, IPG invented a patentable process for
rejecting olivine from the scandium-bearing mineral concentrate.
Olivine response to conventional mineral processing techniques
(magnetic separation, flotation, electrostatic, and density) is
like those of the scandium-bearing pyroxene and amphibole minerals,
making it difficult to separate and diluting the Sc-REE grade of
the concentrate. In addition, the solvent extraction (SX) circuit
for the recovery of Sc and REE from leach solution has also been
defined and successfully tested.
The development program that commenced on
January 31st, 2022, is being undertaken by SGS Canada with expected
completion by the end of March 2023. Results from the work will aid
in the engineering design of Imperial’s Pilot Plant program for
Crater Lake, set to commence later in 2023.
QUALIFIED PERSON
The technical content in this press release was
reviewed and certified by Dr. Yemi Oyediran, an Ontario-registered
P. Eng., Imperial's Vice President, Metallurgical Development.
ABOUT IMPERIAL MINING GROUP
LTD.
Imperial is a Canadian mineral exploration and
development company focused on the advancement of its technology
metals projects in Québec. Imperial is publicly listed on the TSX
Venture Exchange as “IPG” and on the OTCQB Exchange as “IMPNF” and
is led by an experienced team of mineral exploration and
development professionals with a strong track record of mineral
deposit discovery in numerous metal commodities.
For further information please
contact:
Peter J.
CashinPresident and Chief Executive OfficerPhone:
+1 (514) 360-0571Email: info@imperialmgp.com |
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Website:
www.imperialmgp.com |
Twitter: @imperial_mining |
Facebook: Imperial Mining Group |
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