Green urease inhibitor coating

A bio-renewable NBPT-based fertilizer coating with glycerin and dimethyl isosorbide addresses ammonia volatilization and safety issues, achieving reduced loss and improved stability with sustainable materials.

WO2026128280A1PCT designated stage Publication Date: 2026-06-18ARRMAZ PRODUCTS INC
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
ARRMAZ PRODUCTS INC
Filing Date
2025-12-04
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Existing fertilizer coatings using N-(n-butyl) thiophosphoric triamide (NBPT) suffer from ammonia volatilization loss and require hazardous solvents, surfactants, and mineral fillers, which pose environmental and safety risks.

⚗Method used

A fertilizer coating comprising NBPT, a bio-renewable solvent like dimethyl isosorbide, and a polar compound derived from renewable feed stocks, such as glycerin, with minimal sulfonyl, carbonate, and pyrrolidone compounds, forming a stable and non-hazardous formulation that reduces ammonia volatilization.

🎯Benefits of technology

The coating significantly reduces ammonia volatilization loss, enhances stability, and improves anti-caking properties while using environmentally friendly and sustainable materials, minimizing odor and safety hazards.

✦ Generated by Eureka AI based on patent content.

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Abstract

A fertilizer coating which includes a urease inhibitor, such as N-(n-butyl) thiophosphoric triamide ("NBPT"), a bio-renewable solvent, preferably the bio-renewable solvent comprises at least one from the group of glycerin, corn syrup, dextrin, sorbitol, and combinations thereof, a polar compound derived from a renewable feed stock, optionally green, preferably an aprotic compound, more preferably at least one of dimethyl isosorbide ("DMI"), valerolactone, cyrene, levoglucosan or combinations thereof, further preferably the dimethyl isosorbide, and preferably further comprising a water soluble dye is included herein. Also included is a coated fertilizer with the aforementioned fertilizer coating as well as methods of making the coating and the coated fertilizer.
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