Cation Source Stabilizes (Thio)phosphoric Acid Triamide Urease Inhibitors
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Solution Overview
Problem
Urease inhibitors, specifically (thio)phosphoric acid triamides, face stability issues when used with urea-containing fertilizers, particularly when combined with additional P-containing fertilizers like NPK fertilizers, leading to significant decomposition and reduced storage life, especially under tropical conditions.
Innovation Solution
Incorporating a cation source, such as Ca2+, Mg2+, or quaternary ammonium groups, into a composition with (thio)phosphoric acid triamides and fertilizer mixtures to prevent decomposition, thereby stabilizing the urease inhibitors and extending their storage life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If (thio)phosphoric acid triamides are used as urease inhibitors with urea-containing fertilizers, then urease inhibition efficacy is improved, but decomposition occurs when combined with P-containing fertilizers leading to reduced storage life
Solution Approach 1:
A cation source is introduced as an intermediary substance between the (thio)phosphoric acid triamide urease inhibitor and the P-containing fertilizer. The cation source prevents direct decomposition reactions by forming stable complexes or altering the chemical environment, thereby maintaining the inhibitor's stability and extending storage life without compromising urease inhibition efficacy.
Solution Approach 2:
The invention changes the chemical parameters of the fertilizer composition by adding a cation source that modifies the ionic environment. This parameter change prevents the decomposition pathway that would otherwise occur between the urease inhibitor and phosphate ions, allowing long-term storage while maintaining the inhibitor's functional properties.
2Productivity
If (thio)phosphoric acid triamides are stored with P-containing fertilizers under tropical conditions, then fertilizer availability is improved, but decomposition rate increases significantly
Solution Approach 1:
The cation source acts as a protective intermediary that shields the (thio)phosphoric acid triamide from direct contact and reaction with phosphate ions in P-containing fertilizers. This mediation prevents decomposition even under accelerated tropical storage conditions, maintaining both fertilizer availability and inhibitor stability.
Solution Approach 2:
The cation source provides beforehand cushioning by pre-establishing a protective chemical environment before decomposition can occur. The cation source is present in advance to neutralize or prevent the formation of decomposing complexes between the urease inhibitor and phosphate, creating a buffer against harmful decomposition reactions.
3Productivity
If urease inhibitors are applied together with urea and P-containing fertilizers, then nitrogen utilization is improved, but storage stability decreases
Solution Approach 1:
The cation source serves as a stabilizing intermediary that enables the co-application of urea, P-containing fertilizers, and (thio)phosphoric acid triamide urease inhibitors. By preventing direct decomposition reactions, the cation source allows all three components to be stored together long-term while maintaining their individual functionalities and composition stability.
Solution Approach 2:
The invention creates a stable composite fertilizer composition by combining urea, P-containing fertilizers, and (thio)phosphoric acid triamide urease inhibitors in the presence of a cation source. The cation source acts as a binding matrix that maintains the integrity of this multi-component system during storage, preventing phase separation and chemical degradation.
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 cation source effectively reduces decomposition of (thio)phosphoric acid triamides when used with P-containing fertilizers, maintaining their stability and urease inhibiting efficacy, allowing for longer storage and improved handling and application of fertilizer compositions.
Implementation Method 1
the storage life of the urease inhibitor is limited in the presence of urea-containing fertilizers... the higher the temperature, the shorter is the storage life... if urea is stored under tropical conditions, a major part of the urease inhibitor has undergone decomposition
Data Source
AI summary
A mixture including a cation source and a (thio)phosphoric acid triamide is disclosed. A granule coated with a cation source and including a fertilizer is disclosed. A composition obtainable by specific processes and including a (thio)phosphoric acid triamide, a fertilizer mixture, and a cation source is disclosed.