Century Lithium Reports ON Testing with Saltworks and Production of Battery Grade Lithium Carbonate
TSXV: LCE | OTCQX: CYDVF
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NEWS RELEASE
CENTURY LITHIUM REPORTS ON TESTING WITH SALTWORKS
AND PRODUCTION OF BATTERY GRADE LITHIUM CARBONATE
August 21, 2023 – Vancouver, Canada – Century Lithium Corp. (TSXV: LCE) (OTCQX: CYDVF) (Frankfurt:
C1Z) (Century Lithium or the Company) is pleased to report testing results at Saltworks Technologies, Inc.
(Saltworks) in Richmond, Canada, and additional production of high-purity lithium carbonate (Li2CO3) using
product solutions from the Company’s Lithium Extraction Facility (Pilot Plant) in Amargosa Valley, Nevada,
USA. The solutions tested at Saltworks were derived from leaching of claystone from the Company’s 100%-
owned Clayton Valley Lithium Project (Project) in Nevada; and processed at the Pilot Plant via direct lithium
extraction (DLE) to produce an intermediate concentrated lithium solution (DLE eluent).
“It is very positive to see consistency in our high-purity, 99.87%, lithium carbonate product grades from
our Pilot Plant this year” stated Bill Willoughby, President, and CEO of Century Lithium. “The highlight
though, is the almost five-fold increase in lithium grade in the concentrated lithium solution generated at
the Pilot Plant. This was achieved through collaboration with Koch Technology Solutions and their Li-ProTM
system, and its integration into Century Lithium’s chloride-based leaching process.”
Highlights
• Repeated production of high-purity (99.87%) battery-grade lithium carbonate
• Improved lithium concentrations in DLE eluent
• Reduced volume of solution in downstream treatment and recycling
• Potential to eliminate evaporation from the post DLE process flowsheet
• Active testing underway to further improve DLE eluent grade
Lithium Carbonate Assay Results
Saltworks has once again produced battery-grade lithium carbonate (Li2CO3) from the DLE eluent produced
at the Pilot Plant. The table below is a comparison of Saltworks’ 2023 results for Li2CO3, DLE eluent Batch
2, with the previously reported results from DLE eluent Batch 1 (see May 25, 2023 news release). Also
shown are the constituent levels for battery grade Li2CO3, as published by two major producers. The assays
results were finalized by Saltworks and independently assayed by SGS Canada, Inc. These results show
consistency in composition of both the DLE eluent produced by the Pilot Plant earlier in the year and the
resulting Li2CO3 product produced by Saltworks, achieving 99.871% content versus 99.875% reported
previously.
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Li2CO3 Assay Results
Century Li2CO3
Batch 2 (August 2023)
Century Li2CO3
Batch 1 (May 2023)
Reference Grades
Li2CO3 wt% 99.871 99.875 >99.5
H2O wt% 0.05 0.03 0.2 to <0.5
Na wt% 0.027 0.047 0.03 to <0.05
Ca wt% 0.012 0.009 0.01 to <0.04
Fe Wppm 3 3 <5 to 10
Al Wppm 3 <2 <10 to 10
Cu Wppm 3 <4 <5 to 10
Ni Wppm <5 <5 <6 to 10
Zn Wppm <5 13 <5 to 10
Cl wt% 0.01 0.008 <0.01
Notes: wt% (weight percent), wppm (weight parts per million), calculated Li2CO3 purity based on sum of impurities measured
above detection limit. Reference grades are from published specifications from two major producers of battery grade Li2CO3
Lithium in DLE Eluent
As recently reported (see August 9, 2023 news release), Century Lithium collaborated with Koch
Technology Solutions (KTS), a Koch Engineered Solutions’ (KES) company, and integrated KTS’ Li-ProTM
system into the DLE stage of the Pilot Plant. This work has increased the grades of the DLE eluent
(intermediate lithium product solution) several fold. These changes are outlined in the table below, as
reported by analyses from Saltworks.
DLE Eluate Assay Results
Batch 1 2 3 4 5
Lithium (Li) (ppm) 1,430 1,610 1,885 3,970 6,780
Sodium (Na) (ppm) 22,400 25,850 24,150 19,100 8,220
Total dissolved solids (TDS) (ppm) 77,450 77,850 82,600 78,300 79,300
Li:TDS 0.018 0.021 0.023 0.051 0.085
Li:Na 0.064 0.062 0.078 0.208 0.825
Notes: DLE eluent for Batch 1 and 2 used to produce Li2CO3cited above.
Batches 1, 2 and 3 are DLE eluents produced during the first quarter of 2023. Li2CO3 production was carried
out to completion in batches 1 and 2 but the processing of Batch 3 was put on hold due to its similarity to
batches 1 and 2 and the improvements seen in the grades of batches 4 and 5. These improvements in
lithium grade from 1,430 parts per million (ppm) to 6,780 ppm, increase in the ratio of lithium to total
dissolved solids (TDS) from 0.018 to 0.085, and reduction in sodium from 25,850 ppm to 8,220 ppm all
occurred with the introduction of KTS’ Li-ProTM system into the DLE stage of the Company’s Pilot Plant.
Implications for Lithium Carbonate Production
The increase in lithium (Li) grade and the Li:TDS ratio has positive implications for the size and costs of the
lithium carbonate production portion of the lithium extraction process at the Project. Within the Saltworks
flowsheet, these higher values equate to a lower volume of solution to be treated and a proportionate
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decrease in the amount of water that must be removed (evaporated) prior to lithium carbonate
precipitation. This will also affect the recycled solutions within the lithium carbonate production stage by
reducing the volume of solutions moved in this stage and other leaching areas of the processing plant.
The information derived from the Pilot Plant, including the test results from the combination of Century
Lithium’s DLE process and KTS’ Li-ProTM system, and recent component changes at the Saltworks
laboratory, is supplemental to the Feasibility Study for the project. The design basis for the Feasibility Study
was established at a Li:TDS ratio of 0.02.
The Saltworks flowsheet targets a lithium grade of 10,000 to 20,000 ppm (10-20 g/L) for precipitation.
Work with KTS at the DLE stage at the Pilot Plant has seen preliminary, internally assayed, lithium solution
grades of over 8,000 ppm in the DLE eluent. Work is continuing within the DLE area to further increase
lithium grades in solution, creating the scope to reduce solution volumes and the potential to eliminate a
major evaporation step from the process flowsheet. As a supplement to the Feasibility Study, the Company
is pursuing these potential cost and size savings with Saltworks.
Moving Forward
Work on the Feasibility Study continued throughout the six months ended June 30, 2023, with more than
20,000 consultant hours expended since its commencement. Following receipt of initial values from our
consultants, Wood PLC and thyssenkrupp nucera, the Company is conducting internal reviews to assess
optimization and cost reduction opportunities; work which is underway. In June 2023, the Company
engaged Kiewit Industrial Group in Lone Tree, Colorado to assist with the review of project designs and
estimates with attention to site development, material and supply costs, and construction methods. One
optimization opportunity, reducing or eliminating the use of thickeners for tailings separation in the
process configuration, was implemented and is under trial at the Pilot Plant.
The Company’s collaboration with KTS is underway, utilizing KTS’ Li-ProTM equipment in the DLE section of
the Pilot Plant, where lithium is selectively recovered from the leach solution while deleterious elements
are rejected. Testing with KTS is expected to continue through the 3rd quarter while KTS collects
information to prepare an engineering design and cost estimate for a full-scale deployment of Li-ProTM
system which will supplement the Company’s Feasibility Study.
Qualified Person
Todd Fayram, MMSA-QP and Daniel Kalmbach, CPG, are the qualified persons as defined by National
Instrument 43-101 and have approved the technical information in this release.
About Century Lithium Corp.
Century Lithium Corp. (formerly Cypress Development Corp.) is an advanced stage lithium company,
focused on developing its 100%-owned Clayton Valley Lithium Project in west-central Nevada, USA.
Century Lithium is currently in the pilot stage of testing on material from its lithium-bearing claystone
deposit at its Lithium Extraction Facility in Amargosa Valley, Nevada and progressing towards completing
a Feasibility Study and permitting, with the goal of becoming a domestic producer of lithium for the growing
electric vehicle and battery storage market.
ON BEHALF OF CENTURY LITHIUM CORP.
Suite 1610 - 777 Dunsmuir Street, Vancouver, BC V7Y 1K4 Canada
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WILLIAM WILLOUGHBY, PhD., PE
President & Chief Executive Officer
For further information, please contact:
Spiros Cacos | Vice President, Investor Relations
Direct: +1 604 764 1851
Toll Free: 1 800 567 8181
centurylithium.com
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