RAIN City Resources Announces Expansive Technology Agreement with Ion Source Llc FOR Lithium and Critical Minerals Extraction
145 – 251 Midpark Blvd S.E., Calgary Alberta T2X 1S3
RAIN CITY RESOURCES ANNOUNCES EXPANSIVE TECHNOLOGY AGREEMENT WITH
ION SOURCE LLC FOR LITHIUM AND CRITICAL MINERALS EXTRACTION
Calgary, A.B. – April 17, 2026 – Rain City Resources (CSE: RAIN) ("Rain" or the “Company”) is pleased
to announce that it has entered into an expansive term sheet with Ion Source LLC (“Ion Source”), a
Texas based technology company focused on wastewater purification. The agreement provides both
parties with an initial 90-day period to finalize and execute binding definitive agreements covering a
broad range of collaborative initiatives.
Rain and Ion Source will jointly develop new products and technologies with a focus on DLE and
critical mineral extraction by adapting Ion Source’s patent published water purification cavitation -
electrolysis platform (the “IS Technology”). Rain shall be granted an exclusive licensing arrangement
in South America. Rain and Ion Source shall establish a jointly owned intellectual property company
to develop and commercialize co-developed patents and actively promote the IS Technology across
key resource jurisdictions.
Our next-generation platform—Accelerated Controlled Critical Minerals Extraction (AC²ME), will
provide a patentable approach for extracting lithium and other critical minerals from brines, while
also using and promoting the IS Technology for advanced water purification solutions associated with
hydrocarbon and mineral extraction activities.
Deal Highlights
• Joint Development: Co-development of new applications derived from the IS Technology,
including, but not limited to, direct lithium and critical mineral extraction.
• Exclusive Rights: Rain to receive exclusive rights to utilize the IS Technology for new appli-
cations in South America.
• Shared Intellectual Property: Creation of a jointly owned IP company to develop, manage,
and license patents arising from collaborative work.
• Technology Promotion: Ion Source to appoint Rain as a non-exclusive agent to introduce
and promote IS Technology to resource sector companies in North and South America.
• Global Collaboration: Joint commercialization opportunities for co-developed technolo-
gies outside South America.
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• Strategic Investment Rights: Rain granted a right of first refusal on any Ion Source capital
raises for the duration of the partnership.
• Acquisition Rights: Ion Source will provide Rain an 18 month right of first refusal on any po-
tential sale of Ion Source following the execution of definitive agreements.
• Research Collaboration: Potential collaboration with the University of Calgary on process
development.
• Regional Support: Continued strategic assistance from the Catholic University in Santiago,
Chile.
CEO Commentary
Benjamin Hill, CEO of Rain City Resources, commented:
“After funding a successful pilot plant last year in conjunction with former partner Avonlea Lithium ,
Rain has remained focused on identifying an environmental and commercially scalable solution for
DLE in regions where freshwater scarcity demands ultra efficient processes. Following extensive
technical evaluation and discussions with multiple technology providers, we believe Ion Source
offers the strongest platform from which to advance our next- generation DLE and critical mineral
extraction solution.”
Nicholas Holbrook, CEO of Ion Source, commented:
"This partnership brings together two teams that understand what it takes to deliver real solutions in
the field. Rain offers deep regional knowledge and strong technical capabilities. Together, we have a
clear path to commercialize advanced water treatment and critical mineral recovery at scale through
our combined platform."
Next Steps
With a long term, broad ranging technical solution secured, Rain will continue its engagement with
partners and stakeholders in South America. W ith an expanded technical team working
collaboratively with Dr Ian Hutcheon, Director of Rain and Professor Emeritus of Geochemistry at the
University of Calgary , on refining our AC²ME process we are confident in our ability to deliver a
patented commercial DLE solution. Additionally, Rain has already begun working with Ion Source on
commercialising Ion Source’s underlying water purification technology in South and North America.
About Rain City Resources
Rain is an integrated critical mineral technology and project development company committed to
addressing the environmental, social, and economic challenges of lithium and critical mineral
extraction from brine. By advancing scalable, water-conscious DLE solutions, Rain is helping drive
the transition to a clean energy future.
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About Ion Source LLP
ION Source is a U.S.- based water treatment technology company commercializing a proprietary,
patent-pending advanced separation platform for the purification of industrial and produced waters
and the recovery of critical minerals from brines. ION Source's technology is designed to deliver
efficient, scalable, and environmentally responsible treatment of high -salinity and contaminated
water streams. Applications span oil and gas produced water management, lithium and critical
minerals extraction, and industrial wastewater treatment
FOR FURTHER INFORMATION CONTACT:
Benjamin Hill David Shaw
Chief Executive Officer Chairperson
RAIN CITY RESOURCES INC.
Website: www.raincityresources.com
Email: [email protected]
Telephone: 403-693-8004
Cautionary Statement Regarding Forward-Looking Information
This news release may include certain "forward- looking statements" under applicable Canadian
securities legislation. There can be no assurance that such statements will prove to be accurate, as
actual results and future events could differ materially from those anticipated in such statements.
Accordingly, readers should not place undue reliance on forward-looking statements. Rain disclaims
any intention or obligation to update or revise any forward- looking statements, whether as a result of
new information, future events or otherwise, except as required by law. There can be no assurance
that proposed operations will be successful or that the anticipated financial, economic or strategic
benefits will be realized.
Neither the Canadian Securities Exchange nor its Regulation Service Provider (as the term is defined
in the policies of the Canadian Securities Exchange) accepts responsibility for the adequacy of
accuracy of this news release.