Standard Lithium Provides Update on its El Dorado, Arkansas Project and SiFT Lithium Carbonate Plant

EL DORADO, Ark. (GLOBE NEWSWIRE) — Standard Lithium Ltd. (“Standard Lithium” or the “Company”) (TSXV: SLI) (NYSE American: SLI) (FRA: S5L), an innovative technology and lithium project development company, offered an update on the installation of the SiFT lithium carbonate plant at its flagship South Arkansas project and other related developments.

The installation of the ‘SiFT’ lithium carbonate plant is completed, with all major connections made to the existing plant, and the installation of a new weatherproof enclosure. ‘Wet’ commissioning of the SiFT Plant is ongoing, and it is expected that fully

integrated operations will commence during September. Standard Lithium has also installed and commissioned a novel osmotically assisted High Pressure Reverse Osmosis (HPRO) unit at the demonstration plant in El Dorado. This unit sits between LiSTR and SiFT and is used to concentrate the lithium chloride product continuously produced by the existing LiSTR Direct Lithium Extraction (“DLE”) plant, so that it can then be converted to lithium carbonate. The HPRO unit is now operational and is being integrated into the overall process flow at the plant.

Standard Lithium also issues an update on the company’s status following Hurricane Ida. In advance of the storm, Standard Lithium’s team in Arkansas engaged pre-emptive emergency safety protocols to secure the plant, critical infrastructure and team at the El Dorado site. Standard Lithium personnel ensured all equipment was moved to a safe, staging area to protected against possible storm damage. Ultimately, with a shift in Hurricane Ida’s path, operations continued without interruption.

Dr. Andy Robinson, President and COO of Standard Lithium commented “we’re very thankful that our team and operations are safe and that El Dorado was spared the worst of Hurricane Ida. Our project execution efforts continue and with the final stages of commissioning and integration almost finished, we are now in the final stages of running the only continuous, 24/7 start-to-finish brine-to-carbonate plant in North America.”

Standard Lithium has also announced its latest corporate citizenship efforts to support the El Dorado community. In September, Standard Lithium, alongside LANXESS and others, will be a major sponsor for the “22nd Annual SouthArk Outdoor Expo!” being hosted by the South Arkansas Community College Foundation on Saturday, September 11, 2021. In October, Standard Lithium will be a ‘Superstar Sponsor’ for the “Main Street El Dorado Musicfest 2021” which will feature performances by the likes of Frank Foster and Ice Cube.