Low Value Know-how to be Trialed in DLE Pilot Plant Conversion Stage, Aiming to Decrease Power Use and CO​2 Emissions

Highlights:

• An preliminary quantity of 88m³ of concentrated eluate, which is the lithium carbonate equal (LCE) of approx. one tonne, has been produced from the Firm´s DLE pilot plant in Copiapó, Chile over an working interval of 384 hours with 14 cycles accomplished

• This completes the primary stage of manufacturing from the DLE pilot plant

• Outcomes present the DLE adsorbent achieved a lithium restoration price of roughly 95% from the brine, with complete restoration (adsorption plus desorption) reaching roughly 88%

• Impurity rejection charges have been very excessive producing a low impurity eluate conducive to the downstream conversion course of.

• The concentrated eluate is being shipped in 4 batches to the services of Conductive Power in Chicago, USA, for conversion into battery grade lithium carbonate

Desk 1: Standing of concentrated eluate from pilot plant first stage manufacturing

• Conductive Power accomplished test-work on a 200L pattern of concentrated eluate shipped in Could 2024 to optimise the downstream course of earlier than receiving the bigger quantity shipments

• The conversion test-work produced a number of samples of lithium carbonate with 99.75% lithium carbonate purity demonstrating that the method achieves targets and is repeatable

• The result’s a primary affirmation {that a} course of has been developed that can effectively produce battery-grade lithium for the Laguna Verde challenge from pilot scale DLE eluate

• CleanTech Lithium continues to be a frontrunner in exploration and growth of DLE primarily based tasks in Chile and this pilot scale manufacturing will present giant take a look at samples of lithium carbonate to potential offtake companions looking for product qualification.

• Topic to the completion of the re-injection properly in September, the reserve report for Laguna Verde is scheduled to be accomplished by Montgomery and Associates in October 2024.

Steve Kesler, Govt Chairman and Interim CEO, of CleanTech Lithium PLC, stated:

“We’re very happy by these outcomes because it exhibits we are able to produce battery-grade lithium with low impurities from our Laguna Verde brine challenge. Working with our companions on the downstream course of, Ahead Water and Conductive Power, we are able to now reveal your entire DLE course of from brine to last lithium product.

“The optimised downstream course of will now be utilized to the preliminary quantity of 88m³ of concentrated eluate, or roughly 1 tonne of LCE, produced from the primary stage of manufacturing from our DLE pilot plant. It will produce vital take a look at pattern volumes of battery-grade lithium carbonate for graduation of testing with potential strategic companions. That is essential while the Chilean authorities is reviewing the feasibility of lithium tasks to establish probably the most superior firms in Chile and if they’re to achieve their goal of getting three to 4 new lithium tasks in growth by 2026.”

Additional Info

Pilot Plant in Copiapó First Stage Manufacturing Accomplished

The Firm´s DLE pilot plant is in Copiapó, Chile, roughly 275km from Laguna Verde. The plant completed commissioning in late March 2024 and up till mid-June a complete quantity of 1196m³ of brine from the Laguna Verde challenge was processed within the plant with a complete of 14 cycles accomplished. Every cycle represents a quantity of brine being fed first by means of filtration to take away suspended solids, then into DLE columns that are full of adsorbent designed to be selective for lithium molecules. Lithium, as lithium chloride, is adsorbed from the brine, earlier than desorption with water to create a purified lithium chloride eluate. A reverse osmosis (RO) unit on the DLE pilot plant then concentrates the eluate by extracting roughly 75% of the water to type a concentrated eluate.

Averaged throughout the 14 cycles, the restoration price achieved by adsorption of lithium by the adsorbent was 95% and the restoration price of desorption from the adsorbent was 93%. The entire restoration price averaged 88% and was extremely constant as proven in Determine 1. The temperature of the brine and desorption water, utilizing the typical ambient temperature in Copiapó through the March to June interval of operation, was within the vary of 20^oC to 25^oC, which didn’t considerably have an effect on the restoration achieved.

Determine 1: Pilot Plant Whole Restoration Charge

The eluate manufacturing price was comparatively secure after the preliminary ramp up interval reaching a mean of two.8 kg LCE per hour. The design of the plant is 1 tonne per thirty days of LCE primarily based on designed month-to-month working schedule of 360 hours. As a result of price range and quantity concerns, the plant was run for 384 hours for the primary stage of deliberate operation producing a complete of 1.085 tonnes of LCE as eluate. Primarily based on the hourly manufacturing price this met and exceeded the design capability of the plant.

Determine 2: Pilot Plant Manufacturing Charge (Kg LCE/hr in Eluate)

Selectivity of the adsorbent is one other key efficiency parameter for a DLE operation. DLE primarily acts as a purification stage, recovering lithium chloride from the brine while rejecting different impurities. For all the main ions within the brine, aside from boron, the rejection price was very excessive as proven in Fig. 3 under. Extra cycles will additional validate this efficiency. The standard of the eluate was constant over the primary stage of manufacturing with the low degree of impurities facilitating downstream conversion.

Determine 3: DLE Efficiency – Rejection of Main Impurities

After completion of the DLE stage, the eluate is concentrated utilizing a reverse osmosis (RO) unit on the pilot plant. On completion of each phases the lithium grade within the purified lithium chloride eluate is over ten occasions greater than the feed brine. The concentrated eluate was then loaded right into a flexitank in a typical delivery container and transported to the port of Caldera for cargo to North America.

Downstream Processing into Battery Grade Lithium Carbonate: Take a look at-work Accomplished

For the conversion of the concentrated lithium chloride eluate into battery grade lithium carbonate, CleanTech Lithium has engaged a number one lithium processing firm, Conductive Power, primarily based in Alberta, Canada, which has services in Chicago, USA, with key downstream processing items proven in Determine 4 under. The standing of the concentrated eluate cargo is proven in Desk 1 with processing to start in August 2024.

Determine 4: Conductive Power Carbonation Reactor Tank and Tools for Washing, Filtering & Drying

In Could 2024 CTL air-freighted a 200L pattern of concentrated eluate from the pilot plant to Conductive Power to undertake test-work to optimise the conversion course of. The method steps are proven in Determine 5, involving an extra stage of RO, earlier than utilizing Ahead Osmosis (FO) to realize a really excessive degree of focus. Ion change (IX) is used to take away calcium, magnesium, and boron. The ultimate steps are carbonation after which washing, filtration and drying to provide a battery grade product. Conductive Power´s method is to simplify the method that achieves most yield by minimizing course of steps and, the place losses happen, produce fluids which can be simply recycled to additional maximize yield.

Determine 5: Conductive Power Conversion Course of

Reverse Osmosis and Ahead Osmosis

The rise in eluate and lithium focus within the R/O and F/O phases are proven in Desk 2 under. R/O is efficient for focus till Whole Dissolved Solids (TDS) attain the extent of roughly 60,000 – 70,000 TDS, after which it’s more and more vitality intensive and expensive. F/O is very efficient in additional focus to the required lithium grade for carbonation, on this case 18,000mg Li/L (or 1.8% Lithium). The F/O unit is offered by Ahead Water Know-how, one other Canadian firm primarily based in Ontario. F/O achieves a excessive focus issue with a lot decrease vitality use than the choice of utilizing a mechanical evaporator, whereas being extremely appropriate for utilising photo voltaic thermal because the vitality supply to energy the F/O course of.

Desk 2: Outcomes from focus of Laguna Verde eluate by means of R/O adopted by F/O

Ion Change to Take away Impurities

Ion change (IX) was used for elimination of calcium and magnesium, which achieved 85% and 87% reductions respectively. Whereas feed concentrations have been low, 100% of barium and manganese have been additionally eliminated in the identical course of. Extra optimization is feasible with potential for additional calcium elimination. Lithium loss was low at 3%.

Conductive then utilized its optimised IX for elimination of boron. This was extremely efficient reaching >99.5% elimination of boron. Nonetheless, there was a 22% lack of lithium to the regeneration fluid. This is able to be recaptured by recycling the regeneration fluid to the F/O feed which was not carried out for this small-scale test-work. The lithium loss from the boron IX is predicted to be lowered (recovered) to a gentle state loss price of about 3%.

Carbonation and Battery Grade Lithium Pattern

The carbonation test-work achieved an distinctive yield of 96% of the theoretical most. The ultimate product, after the wash process, was 99.75% lithium carbonate purity as proven in Desk 3. Additional optimisation of the washing stage is deliberate with a view to scale back impurities to the best extent doable and due to this fact maximise the worth of the battery grade product.

Desk 3: Course of test-work lithium carbonate pattern purity Fig. 6: Take a look at-work pattern

Extra Operations

Laguna Verde Reserve Report Replace

The following stage of useful resource analysis on the Laguna Verde challenge is to provide an up to date JORC compliant useful resource and a reserve report primarily based on changing a portion of sources into reserves. The administration of the useful resource analysis programme and reserve report is led by Montgomery and Associates, a number one hydrogeology marketing consultant with in depth expertise in useful resource analysis of lithium brine tasks in Chile and Argentina. Reserve estimation will feed straight into the Pre-Feasibility Examine which is focused for later this 12 months.

The reserve calculation requires the completion of pumping checks and a re-injection properly on the challenge which is scheduled for September 2024, when drilling gear may be re-mobilised after the present winter break in operations. Topic to the completion of the re-injection properly in September, the reserve report is scheduled to be accomplished by Montgomery and Associates in October 2024.

Competent Individuals

The next skilled acts as certified particular person, as outlined within the AIM Word for Mining, Oil and Fuel Firms (June 2009) and JORC Code (2012):

Marcelo Bravo: Chemical Engineer (Universidad Católica del Norte), has a Grasp’s Diploma in Engineering Sciences main in Mineral Processing, Universidad de Antofagasta. He at the moment works as a Senior Course of Consulting Engineer on the Advert-Infinitum firm. Mr Bravo has related expertise in researching and growing potassium, lithium carbonate, and photo voltaic evapo-concentration design processes in Chile, Argentina, and Bolivia. Mr Bravo, who has reviewed and permitted the data contained within the chapters related to his experience contained on this announcement, is registered with No. 412 within the public registry of Competent Individuals in Mining Assets and Reserves per the Legislation of Individuals Competent and its Rules in power in Chile. Mr Bravo has enough expertise related to the metallurgical checks and the kind of subsequent processing of the extracted brines into account and to the exercise being carried out to qualify as a reliable particular person, as outlined within the JORC Code. Mr Bravo consents to the inclusion within the press launch of the issues primarily based on his data within the type and context wherein it seems.

The data communicated inside this announcement is deemed to represent inside data as stipulated underneath the Market Abuse Rules (EU) No 596/2014 which is a part of UK legislation by advantage of the European Union (Withdrawal) Act 2018. Upon publication of this announcement, this inside data is now thought-about to be within the public area. The one that organized for the discharge of this announcement on behalf of the Firm was Gordon Stein, Director and CFO.

Beaumont Cornish Restricted (“Beaumont Cornish”) is the Firm’s Nominated Adviser and is authorised and controlled by the FCA. Beaumont Cornish’s tasks because the Firm’s Nominated Adviser, together with a accountability to advise and information the Firm on its tasks underneath the AIM Guidelines for Firms and AIM Guidelines for Nominated Advisers, are owed solely to the London Inventory Change. Beaumont Cornish just isn’t appearing for and won’t be accountable to some other individuals for offering protections afforded to clients of Beaumont Cornish nor for advising them in relation to the proposed preparations described on this announcement or any matter referred to in it.

Notes

CleanTech Lithium (AIM:CTL, Frankfurt:T2N, OTCQX:CTLHF) is an exploration and growth firm advancing sustainable lithium tasks in Chile for the clear vitality transition. Dedicated to net-zero, CleanTech Lithium’s mission is to provide materials portions of sustainable battery grade lithium merchandise utilizing Direct Lithium Extraction know-how powered by renewable vitality. The Firm plans to be a number one provider of ‘inexperienced’ lithium to the EV and battery manufacturing market.

CleanTech Lithium has two key lithium tasks in Chile, Laguna Verde and Viento Andino, and maintain licences in Llamara and Salar de Atacama, situated within the lithium triangle, a number one centre for battery grade lithium manufacturing. The 2 main tasks: Laguna Verde and Viento Andino are located inside basins managed by the Firm, which affords vital potential growth and operational benefits. All 4 tasks have direct entry to present infrastructure and renewable energy.

CleanTech Lithium is dedicated to utilizing renewable energy for processing and lowering the environmental influence of its lithium manufacturing by utilising Direct Lithium Extraction with reinjection of spent brine. Direct Lithium Extraction is a transformative know-how which removes lithium from brine, with greater recoveries than typical extraction processes. The tactic gives quick growth lead occasions with no in depth web site building or evaporation pond growth so there’s minimal water depletion from the aquifer. www.ctlithium.com

**ENDS**

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SOURCE: CleanTech Lithium plc

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