Millennial Lithium Corp. Provides Progress Update on the Pastos Grandes Project, Argentina

Vancouver, British Columbia--(Newsfile Corp. - September 19, 2019) - Millennial Lithium Corp. (TSXV: ML) (FSE: A3N2) (OTCQX: MLNLF) ("Millennial" or the "Company") is pleased to provide an update of activities at its Pastos Grandes Project in the province of Salta, Argentina. Advances at the project site include ongoing liming and feeding of brine to pilot ponds, pilot plant construction and an additional long-term pumping test. In addition Millennial has made significant progress in securing its "Fiscal Stability" status to establish the tax regime and other benefits for the project for the next 30 years.

Farhad Abasov, President and CEO, commented, "We are very pleased with the progress to date at our Pastos Grandes Project. The commissioning of the pilot plant facility will be an important milestone for the Company as we will produce battery grade lithium carbonate by basically duplication of the commercial design for the company's 24,000 tonne per year lithium carbonate plant outlined in the Feasibility Study. On the corporate level, the Company is encouraged by the consent of the various National, Provincial and local government entities concerning our application for the Fiscal Stability protection allowing us to be confident in government support for our project and the mining sector in general. The Company is also actively advancing financing, offtake and other strategic talks with large industry players."

The liming plant at Millennial's pilot pond complex is fully operational and treating up to 100 m3 of brine per day, directing the partially purified brine to a large holding pond for concentration of the lithium in preparation for treatment at the Company's pilot plant facility. The liming operation has been successful in reducing the sulphate and magnesium content of the brine and lithium plant feed grade is expected to be reached by December, 2019.

The pilot plant facility is currently under construction and is expected to treat plant grade brine in December, 2019. The pilot plant is planned to produce approximately 3 tonnes per month of battery grade lithium carbonate and includes a final bicarbonation purification stage to ensure consistent production of battery grade lithium carbonate. All material components including the solvent extraction system for the removal of boron, reactors for primary and secondary carbonation, ion exchange units and final bicarbonation reactors as well as a reverse osmosis water purification system are on site and assembly and construction are underway. All electrical systems are in place and the pilot plant complex will be powered by the Company's solar hybrid generating system.