Canadian Mining Journal


ACID: McGill University options exclusive hydrochloric acid process to Mkango

MONTREAL – McGill University has granted a two-year exclusive option and right to acquire the worldwide licence for  a technology to produce high strength hydrochloric acid from calcium chloride feed streams using sulphuric acid to Mkango Resources of Calgary. The process was developed by Dr. Thomas Feldmann and Professor George Demopoulos.

Mkango is the owner of the Songwe Hill rare earth project in Malawi. The flowsheet for the plant incorporates a hydrochloric acid gangue leach step that produces calcium chloride in solution. Acid will be regenerated using the calcium chloride solution, additional calcium chloride and sulphuric acid produced from an on-site plant. A gypsum by-product will be produced.

Mkango  ( says it plans to optimize the Songwe Hill project with a view to improving efficiency and reducing costs. Then it will pursue partnerships, marketing and offtake agreements.

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