Standard Lithium (TSX.V: SLI) (NYSE American: SLI) (FRA: S5L), an innovative lithium project development company, today provided an update on its commercial development activities in El Dorado, Arkansas. According to the update, the Hydroxide Pilot plant, designed and constructed by a third-party global water and process technology vendor earlier in 2022, was successfully installed and commissioned in early October at the project site. Housed in a self-contained unit, the technology takes the lithium chloride feed produced by the company’s Direct Lithium Extraction (“DLE”) Demonstration Plant, converting this feed directly into a lithium hydroxide solution using a novel ion-exchange process. The solution generated by the Hydroxide Pilot will be sent offsite to another location operated by the third-party vendor to complete evaporation and crystallization work to produce battery quality lithium hydroxide. “The successful installation and commissioning of this Hydroxide Pilot is another example of the company’s approach to using novel technological solutions to build a new generation of lithium plants in North America,” said Dr. Andy Robinson, president of Standard Lithium. “The testing and operation of this pilot gives our design team and project partners greater flexibility when we come to design the commercial plant at our South West Arkansas Project.”

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About Standard Lithium Ltd.

Standard Lithium is an innovative technology and lithium development company. The company’s flagship project is located in southern Arkansas, where it is engaged in the testing and proving of the commercial viability of lithium extraction from over 150,000 acres of permitted brine operations. The company operates its first-of-a-kind industrial-scale direct lithium extraction demonstration plant at Lanxess’s south plant facility in southern Arkansas. The demonstration plant utilizes the company’s proprietary LiSTR technology to selectively extract lithium from Lanxess’s tail brine. The demonstration plant is being used for proof-of-concept and commercial feasibility studies. The scalable, environmentally friendly process eliminates the use of evaporation ponds, reduces processing time from months to hours and greatly increases the effective recovery of lithium. The company is also pursuing the resource development of over 30,000 acres of separate brine leases located in southwest Arkansas, referred to as the South West Arkansas Lithium Project, and approximately 45,000 acres of mineral leases located in the Mojave Desert in San Bernardino County, California. Standard Lithium is jointly listed on the TSX Venture Exchange and the NYSE American under the trading symbol SLI, and on the Frankfurt Stock Exchange under the symbol S5L. For more information, please visit the company’s website at www.StandardLithium.com.

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