Quebec Phosphate Breakthrough: Arianne Produces First Continuous Phosphoric Acid in 130 Years
Arianne Phosphate Inc. has announced a significant milestone for Canada’s phosphate sector, successfully producing phosphoric acid on a continuous basis using its high-purity phosphate concentrate from the Lac à Paul project.
The achievement represents the first time in more than 130 years that phosphoric acid has been produced continuously in Quebec from a locally sourced apatite concentrate.
Why this could be important for the agriculture industry
Phosphate plays a vital role in modern agriculture, making this development especially relevant to farmers and the agri-food industry.
Most farmers are familiar with phosphate as a key ingredient in dry bulk fertilizers, which represent a high-volume but relatively low-margin segment of the market. However, phosphate can also be processed into higher-value products depending on the quality of the original concentrate.
Higher-grade phosphate enables the production of green phosphoric acid used in animal feed and specialty fertilizers. At the top end, purified phosphoric acid supports premium applications, including advanced fertilizers designed for improved crop performance.
Advancing a Localized Supply Chain
The work was carried out in partnership with Corem and supported by Natural Resources Canada, highlighting growing collaboration between industry and government to strengthen domestic supply chains for critical materials.
The breakthrough underscores the potential for Quebec to establish a fully localized phosphate supply chain, reducing reliance on imported phosphate rock that has persisted for over a century.
“The importance of phosphate continues to grow while at the same time supply chains are increasingly threatened by geopolitical events,” said Raphael Gaudreault, Chief Operating Officer of Arianne Phosphate. “This breakthrough demonstrates the opportunity for a fully localized phosphate supply chain in Quebec that could significantly reduce dependence on imports.”
The company also emphasized that this development aligns with Canada’s critical minerals strategy and strengthens the country’s position as a reliable supplier of essential materials to Western markets.
Production Results and Technical Advantages
During testing at Corem’s facilities, approximately 1.5 tonnes of phosphoric acid were produced continuously over a one-week period. This steady production demonstrates both the quality and consistency of Arianne’s phosphate concentrate.
One of the key advantages highlighted by the company is the efficiency of its concentrate. The material requires significantly less sulphuric acid to produce phosphoric acid compared to many global sources. This is particularly relevant given that nearly half of the global sulphur supply transits through the Strait of Hormuz, a region vulnerable to geopolitical disruption.
Additionally, the phosphoric acid produced from Arianne’s concentrate can be readily upgraded into purified phosphoric acid, also known as PPA. This higher-value product is critical for several advanced applications, including lithium-iron-phosphate (LFP) batteries, pharmaceuticals, semiconductors and premium fertilizers.
The quality of Arianne’s deposit positions it to produce a higher proportion of these premium products, potentially delivering greater value throughout the agricultural supply chain.
Rising Demand from Energy Transition
Demand for phosphate is expanding beyond agriculture due to its role in energy transition technologies, particularly LFP batteries. These batteries are gaining popularity for use in electric vehicles and energy storage systems due to their safety, cost and durability advantages.
The rapid growth of LFP technology is increasing demand for purified phosphoric acid, placing additional pressure on global phosphate supply. Industry projections suggest potential supply shortages by the end of this decade if new sources are not developed.
As a result, phosphate has been added to the critical minerals lists of Quebec and Canada in 2024, and more recently to the United States list in late 2025. This designation reflects the material’s strategic importance for both food security and clean energy.
Strategic Position for Canada
Arianne Phosphate believes its Lac à Paul project can play a key role in addressing these supply challenges, particularly given the unique igneous nature of its phosphate deposit, which contributes to its high purity.
“For many years the supply of phosphate was taken for granted with few questioning access to this critical material,” said Brian Ostroff, Head of Strategic and Business Initiatives.
The company indicated it is actively exploring downstream production opportunities to further integrate into the value chain. This could position Canada not only as a supplier of raw materials but also as a producer of value-added phosphate products.
Looking Ahead
The successful continuous production of phosphoric acid represents a pivotal step toward building a more secure and resilient phosphate supply chain in North America.
For farmers, it signals potential long-term stability in fertilizer inputs. As geopolitical uncertainty continues to shape global supply chains, developments like this reinforce the importance of domestic resource development and innovation in securing essential inputs for both agriculture and the energy transition.