Rock Tech Engages Nagrom for Testwork on Patent-Pending Processing Method

Vancouver, BC, Canada – April 29, 2021 – Rock Tech Lithium Inc. (the "Company" or “Rock Tech”) (TSX-V: RCK; Frankfurt: RJIB) is pleased to announce that it has engaged Nagrom laboratories to conduct bench scale testwork on the Company’s patent-pending lithium hydroxide production process.  

The bench scale tests will initially be performed on generated liquors, informed by the bench scale testwork from the traditional sulphation route (at the point in the process where Rock Tech’s innovative process applies). This considers quality aspects from various spodumene concentrates, including spodumene concentrate from Rock Tech’s 100% owned Georgia Lake lithium project in Ontario, Canada. The testwork will provide valuable information on the performance of the Company’s innovative production process, inform future pilot scale tests and provide purified lithium hydroxide samples for further testing by the Company and prospective customers.

Figure 1 - Andritz centrifuge, to be used in the Nitrateroute testwork for LHM precipitation

“We are thrilled to work with Nagrom to study our innovative lithium hydroxide production process further,” said Dirk Harbecke, Rock Tech’s chairman. “The results of these tests will provide us a deeper understanding of the flowsheet to establish the dedicated pilot plant.”

“While the nitrate route involves an innovative salt conversion to form lithium hydroxide, it is based technologically on unit operations known from the potash and fertilizer industries and thus, scaling-up risk is low,” said Prof. Dr. Wolfgang Voigt, Director of Rock Tech. “Compared to the traditional route this process does not need sub-zero process steps, allows simplified purification of the lithium hydroxide and reduces the consumption of energy and water. In addition, the process has the potential to deliver pure and attractive by-products for the building materials industry.”

About Nagrom

Nagrom, a privately owned Western Australian company, has been providing metallurgical services to the mining industry for over 30 years. Their Kelmscott facility (Perth, Western Australia) has over 100 processing units and a staff of 120 skilled resources. Nagrom is a recognized brand in the Lithium sector, with extensive spodumene and downstream lithium testwork experience across major and emerging producers.

On behalf of the Board of Directors,

"Dirk Harbecke"

Dirk Harbecke

Chairman

For further information, please contact:

Brad Barnett

Chief Financial Officer

Rock Tech Lithium Inc.

777 Hornby Street, Suite 600

Vancouver, B.C., V6Z 1S4

Telephone: (778) 358-5200

Facsimile: (604) 670-0033

Email: bbarnett@rocktechlithium.com

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Statements included in this announcement, including statements concerning our plans, intentions and expectations, which are not historical in nature are intended to be, and are hereby identified as, "forward‐looking statements".  Forward‐looking statements may be identified by words including "anticipates", "believes", "intends", "estimates", "expects" and similar expressions.  The Company cautions readers that forward‐looking statements, including without limitation those relating to the Company's future operations and business prospects, are subject to certain risks and uncertainties that could cause actual results to differ materially from those indicated in the forward‐looking statements.

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