Dual NBPT DMPP Nitrogen Stabilizer Composition
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Solution Overview
Problem
Current nitrogen fertilizer applications, such as urea and urea ammonium nitrate, suffer from significant nitrogen loss due to biological processes like ammonia volatilization, nitrification, and de-nitrification, leading to reduced efficacy and environmental issues, with existing urease and nitrification inhibitors being expensive and not widely adopted.
Innovation Solution
A nitrogen stabilizing composition comprising 6% to 18% N-(n-butyl) thiophosphoric triamide (NBPT), 1% to 6% 3,4-dimethyl pyrazole phosphate (DMPP), and additional components like lactic acid, citric acid, polysorbate 20, soy lecithin, and a micronutrient concentrate, formulated to maintain stability and enhance coating properties, reducing nitrogen volatilization and leaching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If high percentage of NBPT is used to reduce ammonia volatilization, then nitrogen loss reduction is improved, but formulation cost and complexity increase
Solution Approach 1:
The patent combines NBPT (urease inhibitor) with DMPP (nitrification inhibitor) in a single formulation, creating a dual-function product that addresses both ammonia volatilization and nitrate leaching simultaneously. This merging of two separate inhibitor functions into one composition reduces the need for multiple separate applications and simplifies the overall nitrogen protection strategy while maintaining effective concentrations of both active ingredients.
Solution Approach 2:
The formulation uses a composite solvent system comprising multiple components (ethylene glycol, propylene glycol, N-methyl-2-pyrrolidone, and water) rather than a single solvent. This composite solvent system provides superior solubility and stability for both NBPT and DMPP compared to single-solvent systems, allowing the formulation to maintain high active ingredient concentrations without precipitation or degradation.
2Loss of substance
If multiple solvents are used to achieve high NBPT concentration, then nitrogen loss reduction is improved, but formulation cost increases
Solution Approach 1:
The patent optimizes the concentration parameters of multiple solvent components to achieve the maximum solubility of NBPT and DMPP. By carefully adjusting the ratios of ethylene glycol, propylene glycol, NMP, and water, the formulation achieves high active ingredient concentrations (with NBPT as a major component) while maintaining stability. This parameter optimization allows the use of multiple solvents without excessive cost increase, as the solvent system is tuned to minimize the total quantity needed.
3Object-affected harmful factors
If conventional NBPT formulations are used, then ammonia volatilization is reduced, but nitrate leaching is not addressed
Solution Approach 1:
The patent creates a universal nitrogen stabilization formulation that performs multiple functions: NBPT prevents ammonia volatilization by inhibiting urease activity, while DMPP prevents nitrate leaching by inhibiting nitrification. This multi-functional composition addresses both major pathways of nitrogen loss (ammonia volatilization and nitrate leaching) in a single application, making it broadly applicable to various soil types and climate conditions without requiring separate treatments for different loss mechanisms.
4Loss of substance
If current urease and nitrification inhibitors are used separately, then nitrogen loss is reduced, but application complexity and cost increase
Solution Approach 1:
The patent merges two separate inhibitor products (NBPT-based urease inhibitor and DMPP-based nitrification inhibitor) into a single combined formulation. This eliminates the need for farmers to purchase, store, and apply two separate chemical products, simplifying the application process to a single treatment while maintaining the protective effects against both ammonia volatilization and nitrate leaching.
Solution Approach 2:
The formulation is designed to be applied at the same time as urea fertilizer application, providing preliminary protection against both ammonia volatilization and nitrate leaching before the nitrogen is lost. By combining both inhibitors in one pre-mixed formulation that is applied concurrently with the fertilizer, the system ensures that both protection mechanisms are activated simultaneously without requiring sequential applications or complex timing coordination.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition effectively reduces ammonia volatilization and nitrate leaching, increases wheat biomass yield, and provides long-term stability, making nitrogen more available for plant uptake while minimizing environmental impact.
Implementation Method 1
One process is hydrolysis of urea by the enzyme urease produced by soil bacteria. Urea hydrolysis results in ammonium ions, which in turn convert to ammonia gas that releases from the soil.
Implementation Method 2
Another process is nitrification where ammonium ions from urea hydrolysis convert to nitrites and nitrates ions. Nitrate ions are less stable compared to ammonium ions and can be easily subjected to leaching and runoff.
Implementation Method 3
A nitrogen stabilizing composition comprising 6% to 18% N-(n-butyl) thiophosphoric triamide (NBPT), 1% to 6% 3,4-dimethyl pyrazole phosphate (DMPP), and additional components like lactic acid, citric acid, polysorbate 20, soy lecithin, and a micronutrient concentrate, formulated to maintain stability and enhance coating properties
Data Source
AI summary
A nitrogen stabilizing composition is provided. The composition includes 6% to 18% N-(n-butyl) thiophosphoric triamide (NBPT), 1% to 6% 3,4-dimethyl pyrazole phosphate (DMPP), and a solvent, wherein the ratio of NBPT to DMPP is between about 5.5:1 and 6.5:1.