Leonardite Products, LLC
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Leonardite has become an important production asset for a number of industries, thanks to its unique characteristics. Here at Leonardite Products, we deal predominantly with Agriculture, Oil Field and Foundry applications.
Oil Field Applications

Oil Field

In the oil field, Leonardite is better known as “Lignite” and is predominantly used in water - based drilling mud. The colloidal and soluble properties of "Lignite" help in fluid loss control, serve as clay deflocculants and improve filter cake quality. "Lignite" can be blended with caustic soda, and because of its unique organophilic properties Leonardite, or "Lignite", can also be modified for use in oil-based drilling fluids.

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Agriculture Applications


Our Source™ line of products is used as a soil amendment and fertilizer additive. Leonardite adds organic matter to marginal soils improving texture, moisture holding capacity and pH stability. As a fertilizer enhancement, Leonardite improves a crop’s ability to absorb nutrients, resulting in faster growth, healthier and higher yields.

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Foundry Applications


Foundries use Leonardite as an additive in green sand molding. It reduces clay viscosity, increases mold permeability, absorbs and retains water and improves mold shakeout. The use of Leonardite in green sand systems also improves the foundry environment for workers.

Soil Remediation Applications

Soil Remediation

Leonardite is use for soil remediation with great success. Humex is the brand name GeoResources, the prior owners of Leonardite Products mine and processing center, used for their product used for reclamation and remediation. You'll find Humex to be a recommended additive in the North Dakota.

Industrial Commission Department of Mineral Resources Guide for Remediation of Salt Hydrocarbon Impacted Soil. View PDF

Sodic and Calcareous soils benefit from the organic matter leonardite adds to the soil. Leonardite provides ideal conditions for “good” bacteria to grow and mitigates salt.