Purification of lithium chloride from brine

Purification of lithium carbonate from sulphate solutions

Electrodialysis use in hard rock / spodumene lithium extraction

Did you know?

MEGA ED technology concentrates lithium bicarbonate (LiHCO3) 2× higher than conventional precipitation equilibria

Innovative electrodialysis system for purification of Li2SO4 - Asia/Australia/Africa/Brazil/North America

Innovative electrodialysis system for purification Li<sub>2</sub>SO<sub>4</sub> - Asia/Australia/Africa/Brazil/North America

Patented special electrodialysis method for more effective lithium extraction processes from hard rock and spodumene

MEGA solution possibilities for purification Li2CO3 are in integrating cost-effective desalination phase electrodialysis in the conventional lithium sulphate (lithium hard rock extraction) purification processes.

The main benefits of using MEGA electrodialysis for purification Li2SO4

The current invention method aims to increase the Li yield of the entire production by recovering more lithium from the extraction process itself and additionally from the waste mother liquors.

Reduce your investment and operating costs of obtaining higher lithium concentrations.

Get a high concentration of pure lithium with a simpler production process.

The innovative idea is about integrating the known reaction from the Solvay process used in sodium carbonate production and a patented special electrodialysis.

Would you like to know more about the benefits of using electrodialysis in conventional lithium spodumene process?

Discover more

Lithium carbonate from ore extraction

What is Li<sub>2</sub>CO<sub>3</sub></h3>

What is Li2CO3

Lithium carbonate is the carbonate salt of lithium Li2CO3, one of the most important lithium compounds widely applied in the processing of metal oxides, lithium-ion batteries and ceramics. Lithium carbonate is also used in medicine to treat mood disorders.

In addition, the demand for Li2CO3 is rapidly increasing due to the new development and production of electric vehicles in the last years.

What is spodumene

What is spodumene

Sources of lithium salt Li2CO3 come mainly from lithium minerals. A certain amount of lithium contains more than 100 different minerals, of which spodumene is the main one actively mined for lithium production. Spodumene has a theoretical lithium content of about 8 %.

Lithium ore deposits

Due to its high lithium content, spodumene is considered the most important lithium ore mineral. Spodumene is found in lithium ore deposits such as those found in Australia, Asia, Africa, Brazil and North America.

Lithium extraction from spodumene

Lithium extraction from spodumene

The dominant lithium extraction technology from lithium minerals, especially spodumene, is a sulfuric acid process. After the lithium ore is ground and dissolved with sulphuric acid, the roasting to lithium sulphate is followed. The next step is water leaching, followed by mixing with sodium carbonate to obtain lithium carbonate. The maximum recovery of this process is about 95 %.

However, the main drawbacks of spodumene processing by sulphuric acid are generating huge quantities of waste residue and the necessity of high-temperature pretreatment.

Special electrodialysis for lithium sulfate solution to get pure Li2CO3

Innovated method for lithium carbonate purification using MEGA special electrodialysis

Innovated method for lithium carbonate purification using MEGA special electrodialysis

Limited lithium reserves are increasing pressure on lithium ore processors challenging the cost and efficiency of current lithium recovery methods.

MemBrain, the subsidiary of MEGA, researchers have developed a highly selective electrodialysis system to remove impurities from lithium-rich solutions usable for lithium ore / spodumene extraction.

The advanced electrodialysis shows a high ability to selectively extract lithium carbonate of high grade from lithium sulphate with lower costs than other conventional technologies.

Benefits of using MEGA electrodialysis in conventional lithium brine extraction processes

How does it work?

We offer higher purity and lower energy processing technology that simplifies processing block flow diagrams, boosts yield, and lowers cost.

Purification of lithium carbonate from sulphate solutions using MEGA patented electrodialysis, which works in the unique configuration of these 2 steps:

1 step – MemBrain patented electrodialysis in special configuration:

Li2SO4 + NaHCO3 → Na2SO4 + LiHCO3

2 step - crystallization:

2 LiHCO3 (aq) → Li2CO3 (s) + CO2 (g) + H2O (g)

MEGA ED highlights

Lithium carbonate purity 99.99 % | 2 feeds – 2 products |
Crystallization temperature = 90 – 95 °C | Atmospheric pressure

Benefits of using MEGA special electrodialysis to purify Li<sub>2</sub>CO<sub>3</sub> from lithium ore

Benefits of using MEGA special electrodialysis to purify Li2CO3 from lithium ore

  • Li2CO3 purity up to 99.9 % after bicarbonate heating.
  • Lithium concentration in the produced LiHCO3 is up to 4000 mg/l.
  • Special configuration ED reduces the complexity of production and waste management.
  • High purity commodity Li2CO3 product where SO42- < 0.05 % DMB.
  • It is possible to separate Li2CO3 from Na, K, Rb salts species by precipitation following ED.
  • Bicarbonate intermediate purity after ED is over 97.5 % as Li / (Li + S) by mass.
  • Electrodialysis lowers the amount of water-salt solutions for handling.
  • Electrodialysis is a saving cost for the evaporation steps.
  • Production routes using electrodialysis can be switched from carbonate to hydroxide.

Request a free quotation for your lithium spodumene extraction project

Our experts are ready to find the best solution for your lithium hard rock extraction project.

Our engineers and technologists prepare solutions tailored to your needs and requirements.

Please, fill out the form below. We will reach out to you as soon as possible.

Interested? Contact us.

Vitaly Bleskov

Vitaly Bleskov

Sales Manager

+420 602 737 400 vitaly.bleskov@mega.cz
Ales Platzer

Ales Platzer

Sales Manager

+420 702 176 317 ales.platzer@mega.cz
Lukas Semian

Lukas Semian

Sales Manager

+420 778 463 642 lukas.semian@mega.cz

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