Standard Lithium Successfully Commissions First Commercial-Scale DLE Column in North America

Commercial-Scale DLE Column Now Commissioned and Operational at SLI’s Demonstration Plant in Arkansas Utilizing Koch Technology Solutions Li-Pro LSS Unit

EL DORADO, Ark., April 24, 2024 (GLOBE NEWSWIRE) — Standard Lithium Ltd. (“Standard Lithium” or the “Company”) (TSXV:SLI) (NYSE American:SLI) (FRA:S5L), a leading near-commercial lithium development company, is pleased to announce that it has successfully commissioned and validated the performance of the largest continuously operating Direct Lithium Extraction (“DLE”) equipment in North America. The Company recently installed a commercial-scale DLE column at its Demonstration Plant near El Dorado, Arkansas. The column is a Li-ProTM Lithium Selective Sorption (“LSS”) unit, supplied by Koch Technology Solutions, LLC (“KTS”).

The column was installed and integrated into the Company’s existing Demonstration Plant and is currently extracting lithium from Smackover Formation brine at an input flow rate of 90 gallons per minute (“gpm”; or 20.4 m3/hr). This is, to the best of the Company’s knowledge, both the largest DLE installation, and the only example of a commercial-scale DLE column in operation in North America. Since commissioning, the column has operated continuously and exceeded the design parameters for lithium recovery and rejection of impurities.

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