en.Wedoany.com Reported - Canadian mining technology company Dundee Sustainable Technologies Inc. (CSE: DST) demonstrated its two core patented technologies—the CLEVR cyanide-free gold extraction process and the GlassLock permanent arsenic stabilization process—to the industry in early July 2026 through its industrial demonstration plant in Thetford Mines, Quebec. The company's President and CEO, Jean-Philippe Mai, provided an on-site explanation in the "Mic'd Up" segment of The Northern Miner magazine, addressing how these technologies tackle two major industry challenges in gold processing: cyanide use and arsenic management.
Headquartered in Thetford Mines, Quebec, Canada, Dundee Sustainable Technologies has developed the CLEVR process, a cyanide-free gold extraction technology that uses sodium hypochlorite and hypobromite solutions to achieve over 95% gold extraction in approximately two hours, compared to the 36 to 48 hours typically required for traditional cyanide leaching. The process operates in a closed-loop mode, recovering all reagents and eliminating the need for tailings ponds, thereby reducing environmental liabilities. Jean-Philippe Mai noted that the efficient short contact time enables excellent gold recovery, while the smaller processing scale results in a reduced footprint and lower costs.
In arsenic management, the GlassLock process removes arsenic from ores, concentrates, or solutions and stabilizes it within a glass matrix, forming a dense solid with arsenic content up to 20%, meeting U.S. Environmental Protection Agency standards. This process has been validated in multiple projects: in tests at Revival Gold's Beartrack-Arnett project in Idaho, the technology increased gold grade in concentrates by 31% and reduced arsenic content by 99%. The company stated that these two technologies can handle various material types and have been tested in regions such as Eastern Europe and South America, with daily processing capacities flexibly adjustable from small to medium projects to over 10,000 tons per day.
Dundee Sustainable Technologies operates an industrial demonstration plant in Thetford Mines, where clients can validate technology suitability on commercial-scale equipment. The company has spent over a decade advancing the processes from the laboratory to the industrial demonstration stage, accumulating data across multiple ore types and geographic regions. Jean-Philippe Mai pointed out that introducing new metallurgical processes into the mining industry is a very difficult task, given the capital-intensive nature and long lead times of the sector, and the company is advancing technology implementation with tier-one gold producers.
Currently, approximately 80% of global gold production relies on cyanide leaching processes. As regulations tighten and community demands for cleaner production increase, Dundee Sustainable Technologies' cyanide-free gold extraction and arsenic stabilization technologies offer mining companies new process options. The company encourages project owners to submit ore samples for testing to assess technology suitability.
