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Standard Lithium Signs MoU with Global Specialty Chemical Company LANXESS for the Development of Commercially Viable Extraction of Lithium from Operational Smackover Brine Resource

Partnerships & JV

STANDARD LITHIUM LTD.

Suite 835, 1100 Melville Street

Vancouver, British Columbia

V6E 4A6

NEWS RELEASE

Standard Lithium Signs MoU with Global Specialty Chemical Company LANXESS for the Development of Commercially

Viable Extraction of Lithium from Operational Smackover Brine Resource

May 09, 2018 – Vancouver, BC – Standard Lithium Ltd.(“Standard Lithium” or the “Company”)

(TSXV: SLL) (FRA: S5L) is pleased to announce the signing of a Memorandum of Understanding

(MoU) with global specialty chemicals company LANXESS Corporation (“LANXESS”) and its US

affiliate Great Lakes Chemical Corporation (“GLCC”), with the purpose of testing and proving the

commercial viability of extraction of lithium from brine (“tail brine”) that is produced as part of

Lanxess’s bromine extraction business at its three Southern Arkansas facilities.

LANXESS’ land operations in Southern Arkansas encompass more than 150,000 acres, 10,000 brine

leases and surface agreements and 250 miles of pipelines. LANXESS extracts the brine from their

wells located throughout the area, and the brine is transported to the three Arkansas plants through a

network of pipelines. The three bromine extraction plants currently employ approximately 500 people

and process and reinject several hundred thousand barrels of brine per day.

Standard Lithium has developed proprietary processes related to the extraction of high purity lithium

directly from brines, including tail brine. Additionally, the Company has secured the rights to conduct

exploration, production and lithium extraction activities on roughly 30,000 acres of brine leases

located elsewhere in the Smackover Formation in Southwest Arkansas.

The MoU sets out the basis on which the parties have agreed to cooperate in a phased process towards

developing commercial opportunities related to the production, marketing and sale of battery grade

lithium products extracted from tail brine and brine produced from the Smackover Formation. The

MoU forms the basis of what will become a definitive agreement and is binding until the execution of

a more comprehensive agreement that the parties may execute on the completion of further

development phases. Standard Lithium has paid an initial US$3,000,000 reservation fee to LANXESS

to secure access to the tail brine, with additional fees and obligations in the future subject to certain

conditions.

Robert Mintak CEO of Standard Lithium commented “We are delighted to be entering into a

cooperation with Lanxess, a highly-respected world leader in the specialty chemical sector .” Mr.

Mintak added, “given the scale of the existing infrastructure and potential resource, the mitigation of

project execution risks and acceleration of the Smackover project development timeline, this MoU

represents an important step for Standard Lithium.”

Dr. Andy Robinson, President and COO of the Company stated “This project provides the perfect

opportunity to test modern brine processing technology on an existing lithium brine stream. We hope

to move as quickly as possible towards deploying our Pilot Plant.”

About Standard Lithium

Standard’s value creation strategy encompasses acquiring a diverse and highly prospective portfolio of

large-scale domestic brine resources, led by an innovative and results-oriented management team with

a strong focus on technical skills and modern brine processing technologies. The Company is

currently engaged in the exploration and resource development of the California Lithium Projects

located in the Mojave region of San Bernardino County, California; the project area has significant

infrastructure in-place, with easy road and rail access, abundant electricity and water sources, and is

already permitted for extensive brine extraction and processing activities. The Company is also

rapidly conducting resource evaluation on up to 30,000 acres of brine leases located in the Smackover

Formation in Southwestern Arkansas.

Standard Lithium is listed on the TSX Venture Exchange under the trading symbol “SLL”; quoted on

the OTCQX under the symbol “STLHF”; and on the Frankfurt Stock Exchange under the symbol

“S5L”. Please visit the Company’s website atwww.standardlithium.com.

For further information, contact Anthony Alvaro at (604) 240 4793

On behalf of the Board,

Standard Lithium Ltd.

Robert Mintak, CEO & Director

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies

of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

This news release may contain certain “Forward-Looking Statements” within the meaning of the

United States Private Securities Litigation Reform Act of 1995 and applicable Canadian securities

laws. When used in this news release, the words “anticipate,” “believe,” “estimate,” “expect,”

“target,” “plan,” “forecast,” “may,” “schedule,” and other similar words or expressions identify

forward-looking statements or information. These forward-looking statements or information may

relate to future prices of commodities, accuracy of mineral or resource exploration activity, the

development of lithium extraction technologies and processes, regulatory or government requirements

or approvals, the reliability of third party information, continued access to mineral properties or

infrastructure, fluctuations in the market for lithium and its derivatives, changes in exploration costs

and government regulation in Canada and the United States, and other factors or information. Such

statements represent the Company’s current views with respect to future events and are necessarily

based upon a number of assumptions and estimates that, while considered reasonable by the Company,

are inherently subject to significant business, economic, competitive, political and social risks,

contingencies and uncertainties. Many factors, both known and unknown, could cause results,

performance or achievements to be materially different from the results, performance or achievements

that are or may be expressed or implied by such forward-looking statements. The Company does not

intend, and does not assume any obligation, to update these forward-looking statements or information

to reflect changes in assumptions or changes in circumstances or any other events affections such

statements and information other than as required by applicable laws, rules and regulations. Neither

the Company, nor Lanxess, nor GLCC makes any representations as to the value of brine mineral

lease rights which are the subject of the MOU, the availability of any particular resource or minerals,

or the merits of any proposed work to be undertaken.