Metal Recovery

Chelok© is Periodic Products’ patented series of chelating polymers. The result of more than two decades of biochemical research and development, Chelok polymers  rapidly, permanently, and cost effectively remove, extract and eliminate metals, including transition metals, from water, soil and ash.

With its proprietary polymers, Periodic Products has demonstrated the efficient removal and isolation of metals from ore, coal ash, incinerator ash, and metal-laden tailing ponds. The Company’s polymer technologies are poised to have a significant impact on global mining activities by improving the efficiency of mineral extraction from ores and other mining by-products and while decreasing overall environmental impact.

Cost-Effective Recovery of Metals from Incinerator Ash

In 2010, 86 waste-to-energy (WtE) facilities operating in 24 states processed more than 26 million tons of municipal solid waste. The two types of ash produced during a WtE generation, bottom ash and fly ash are frequently combined to reduce the leaching potential of the component metals. There have been numerous investigations into the possibility of using WtE ash as a source of metals, including copper, lead, mercury and rare earth metals. However, a cost effective method of extraction and isolation has not been previously reported.

Periodic Products Inc.’s patented Chelok technology is a polymer based chelating compound possessing multiple industrial applications. Applying our proprietary extraction technology and patented polymer-based metal isolation procedures, we have successfully isolated copper and lead, the primary metal contaminants from 80-year-old municipal incinerator ash. Based on initial projections, the cost of extraction and isolation (including CAPX) is approximately 50% of the current market price for these metals, making this process economically viable.