Turning sodium sulphate waste into soda ash.
Ecogas converts sodium sulphate (Na₂SO₄) into soda ash (Na₂CO₃) using a patent-pending process that runs at or below 100 °C. It's a lower-energy route than Solvay, and the by-product is valuable gypsum, not calcium chloride waste.
The opportunity
Two industries, one missing link.
Lithium makes a waste problem. Refining lithium and recycling batteries produce large volumes of sodium sulphate. Most of it is stockpiled or sent to landfill at a cost.
Soda ash has an energy problem. Much of the world's soda ash is made by the Solvay process, which needs high-temperature limestone kilns and leaves calcium chloride as waste.
Ecogas connects the two, turning one industry's waste into another's raw material.
Generated by battery materials production and mostly sent to landfill.
Essential for glass, detergents and chemicals, and a key reagent for making lithium carbonate.
Our technology
Sulphate in. Soda ash and gypsum out.
A patent-pending conversion, running at or below 100 °C, that reacts sodium sulphate with common limestone (CaCO₃). It works on Na₂SO₄ from any source, as a solution, brine or solid.
Na₂SO₄ + limestone
Sodium sulphate from lithium, other industries or natural deposits, plus limestone.
≤100 °C process
Our patent-pending process converts Na₂SO₄ at or below 100 °C, with no kilns.
Soda ash
Na₂CO₃ for glass, detergents, chemicals and lithium carbonate production.
Gypsum
A valuable co-product for plasterboard, cement and agriculture.
A better route to soda ash
Ecogas vs the Solvay process.
Solvay has been the standard way to make synthetic soda ash for more than 150 years. Ecogas offers a cleaner alternative.
Feedstocks
One process. Any source of Na₂SO₄.
We start where the need is greatest, in lithium, and scale to every sodium sulphate stream.
Lithium refining
Hydroxide refineries produce sodium sulphate alongside every tonne of battery-grade lithium.
Battery recycling
Recycling lithium-ion batteries generates sulphate-rich streams that need a better end point.
Natural deposits
Natural Na₂SO₄ deposits offer a lower-energy route to soda ash than Solvay.
Other industries
Any industrial process that leaves a sodium sulphate waste stream.
What we make
Two products. Zero waste stream.
One of the world's most widely used industrial chemicals, and a reagent the lithium industry itself depends on.
The calcium from limestone ends up as gypsum, a material with established markets, instead of the calcium chloride waste Solvay produces.
Market insight
Soda ash: the hidden backbone of the energy transition.
Solar glass is one of the most soda-ash-intensive industrial processes, and the solar boom is changing the soda ash market.
Solar glass is now the single largest driver of new soda ash demand.
Soda ash embedded each year in China's exports of solar glass and panels.
Annual growth in global soda ash use, 2020 to 2025, driven largely by solar glass.
“Western economies seeking to onshore solar manufacturing will face challenges in securing sustainable, diversified soda ash supply.”
OPIS Insights, “Soda Ash and Solar Glass: The Hidden Backbone of the Energy Transition”, 17 October 2025
Where Ecogas fits
China dominates soda ash and solar glass supply, and new capacity elsewhere is lagging. Ecogas offers a new, lower-energy source of soda ash made from waste, helping secure supply for solar glass outside China.
Figures and quote: OPIS Insights, “Soda Ash and Solar Glass: The Hidden Backbone of the Energy Transition”, 17 October 2025.
Closing the loop
Lithium's waste, back into lithium.
Soda ash is a key reagent for making lithium carbonate. By turning sodium sulphate from refining and recycling into soda ash, Ecogas helps the battery supply chain feed itself, with less energy and less waste on the land.
Why Ecogas
Waste into value, at lower energy.
Patent pending
Our own process for converting Na₂SO₄ to soda ash at or below 100 °C.
Lower energy
No high-temperature limestone kilns, unlike the Solvay process.
No CaCl₂ waste
The by-product is gypsum, a saleable material, not a disposal problem.
Any Na₂SO₄ source
From lithium refining and recycling to other industries and natural deposits.
Partner with us
Have sodium sulphate? Let's talk.
Based in Perth, close to Western Australia's lithium refineries, we're working with partners across the lithium and chemicals value chain.
- Lithium refiners and battery recyclers
- Owners of natural Na₂SO₄ deposits
- Soda ash and gypsum buyers
- Investors and strategic partners
- Emailinfo@ecogas.com.au
- Phone0405 276 704
- LocationPerth, Western Australia
- ABN48 685 084 244