direct lithium extraction technology low carbon

Direct lithium extraction processes are the engineering solution to add more value and extract more Lithium Carbonate equivalent from mining ventures especially in South America. The technology is focused on brines. Check out an overview of lithium for batteries

  • Reduction in cost
  • Faster process
  • Modular and therefore scalable.
  • Improvement in quantity of LiCO3 or LiOH recovered
  • Reduction in carbon needed

Methods of DLE

There are 3 primary technologies for DLE in brine.

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Different methods of DLE. Vulcan and Lake both intend to use DLE technology.

Companies using direct lithium extraction technologies

There are multiple technologies and the race is on to find the most effective.

From Vulcan Corporate Presentation April 2022. (Download link here). Note that Lake Resources have subsequently announced an MOU offtake with Ford and increased their capacity to 50,000kTpa.

Anson is not listed in this table above. See note below.

Salton Sea vs Rhine Valley Brine

Other contaminants or extraction opportunities Vulcan Appendix 11 Corporate Presentation July 2022 Note: Refer to ASX announcement of 10 March 2021 “High grade lithium, low impurity results from Vulcan’s 2021 Upper Rhine Valley bulk brine sampling”. Comparison of Vulcan’s January 2021 Upper Rhine Valley sample result analysed at KIT (n=1), compared to Salton Sea brine results (n=unknown) as recorded in publicly available literature for all multi-element results except silica; US Patent 4429535 for pre-flash silica values). Salton Sea values adjusted by the density 1.25 -> from mg/kg to mg/l.

Other DLE Miner Technology

Anson Resources (ASN.ASX) reported in June 6 2022, that they had achieved higher lithium recoveries achieved from their test work at Paradox Project in Utah USA. Had 91.5% recoveries against previously estimated 80% They also intend to pull bromine out of the brine in anticipation of Zinc bromate batteries coming online in mid 2020’s

Anson is partnering with Sunresin’s DLE technology to provide good ESG, operational and economic advantages in producing lithium carbonate at the Paradox Project, including:

  • Lithium DLE estimated recovery of 91.5% (against 80% from 2 other un named suppliers) (refer ASX announcement 13 August 2021). (ASX Announcements).
  • No requirement for pre-treatment
  • Use of water (organic process) rather than chemicals to wash the lithium from resin
  • Longest recovery lifespan of bulk industry-grade lithium extracting resin to maximise the unit cost of production for the DLE process.

Vulcan Schemematic – geothermal energy plant. With the brine after using the energy for geothermal power then extract lithium and then finally reinjection of brine back into the ground.

DLE Schematic.PNG

Existing Direct Lithium Extraction Projects

Jade Cove Investments in 2020 have a good breakdown of existing projects. All are brownfield sites. DLE cannot be “copied and pasted” and needs to be project based. Some are hight in Mg and SO4, others are high Mg brine. Many use evaporative as well, to concentrate first.

ProjectStartedTonnes LCEOwnerLocationNotes
Fénix Project 199820,000Minera del Altiplano S.A. (Livent Corporation),Minera del Altiplano S.A. (Livent Corporation),Some DLE then shipped to lower altitude.
Lanke Lithium201715,000Qinghai Salt Lake Industry Co. Ltd.Qinghai, ChinaRussian technology.
Zangge Lithium Carbonate Project201910,000Zangge Potash Fertilizer Co. LtdQinghai, ChinaRamping to 20,000T
Minmetals Yi Li Ping Salt Lake Project20201,000China Minmetals Corp.Qinghai, Chinahybrid evaporation & membrane-type process to separate LiCl and MgCl2
Jintai Lithium Carbonate Project20197,000Qinghai Jintai Potash Co. Ltd.Qinghai, ChinaMg brine.
Project Altis 202220,000Energy Source Minerals Salton Sea, CA USAInto production Q4/2022
Kachi202310,000Lake ResourcesCatamarca ProvincePilot phase, 100,00 by 2030
Rhine Valley20225,0000Vulcan ResourcesUpper Rhine Valley, Germanycombined geothermal with DLE for zero cargon
Data from Jade Cove From Catamarca to Qinghai – The Commercial Scale DLE Operations — Jade Cove Partners

Project ATLiS

Featherstone Geothermal Plant
Image from Salton Sea in Southern California from Energy Source Minerals

Improving Lithium Extraction from Spodumene

Lithium from hard rock spodumene is concentrated from 1.5% in rock, to 6% Lithium, then usually sent to China for refining. Pilbara Minerals has announced some refining improvements. Many of these come from water treatment technologies or other treatment systems. Calix Limited is in the processing industry, and so expect to see more technology to improve Li production from other companies.

  • Calix Limited’s (ASX:CXL) flash calcination technology test-work concentrates it with high calcination conversion rates (>95% for alpha to beta spodumene phase transformation) using fine flotation spodumene concentrate.
  • The contained lithia content of the product is expected to increase from ~5.7-6.0% in spodumene concentrates to >36% in lithium phosphate salts, thereby optimising offshore product logistics, reducing associated carbon emissions, and minimising waste in the destination market.

SunResin Direct Lithium Extraction Technology

Operating Projects
Zangge Lithium10,000LiCO3
Qinghai Jintai Lithium3,000LiCO3
Minmetals Phase 24,000LiCO3
Projects Under Construction
Qinghai Salt Lake BYD Resources pilot600LiCO3
Qinghai Chaidamu Xinghua Lithium5,000LiCO3
Tibet Summit (Argentina)25,000LiCO3
Projects Under Contract
Tibet National Energy10,000LiCO3
Qinghai Jintai Lithium4,000LiOH
Anson Resources (phase 1 2024) + bromine10,000LiCO3
Data from Anson Resources ASX announcement Aug 25 2022

Further Reading

Direct Lithium Extraction—A 21st Century Dot-Com Boom or Bust? ( Journal of Petroleum Technology May 2022 They mention that 2021, DOE identified 15 teams of university researchers as semifinalists in Phase 1 of the competition and awarded $40,000 grants to each team, which then advanced into Phase 2.

direct lithium extraction by Standard Lithium
Standard Lithium’s LiSTR proprietary DLE process. Source: Standard Lithium which has an existing bromine extraction facility, and they would bolt on a lithium DLE plant.

The Standard Lithium “LiSTR” proprietary process uses a solid ceramic adsorbent material with a crystal lattice that is capable of selectively pulling lithium ions from the Smackover brine. The ceramic adsorbent materials are mounted in stirred-tank reactors that contain the tail brine. In the second step, the adsorbent releases the lithium for recovery. The brine is at 700C. The project is 4.3mT of LCE, with annual production at 20kT LCE

Technical Review

Lithium Recovery from Brines Including Seawater, Salt Lake Brine, Underground Water and Geothermal Water by Samadiy Murodjon, Xiaoping Yu, Mingli Li, Ji Duo and Tianlong Deng 2020 Open Access paper here is a detailed view.