Nano Nitrogen-Phosphorous Fertilizer Composition for Heat-Stable Storage

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Solution Overview

Problem

Existing liquid fertilizers with nano clusters of nitrogen and phosphorus face challenges in maintaining stability at elevated temperatures, leading to agglomeration, precipitation, and phase separation, while also failing to achieve high nutrient content and efficient uptake.

Innovation Solution

A process involving the reaction of hydrolyzed urea with monoammonium phosphate in the presence of polyphosphates, followed by treatment with polysorbates and polymers, results in stable nano clusters of nitrogen and phosphorus with a maximum content of 3-9% nitrogen and 6-18% phosphorus (P2O5), maintaining particle sizes below 100 nm and pH stability between 3 and 7.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If liquid fertilizer compositions contain nano clusters of N and P with higher concentrations (N>3%, P>6%), then nutrient content is improved, but stability during storage at elevated temperatures deteriorates (agglomeration, precipitation, phase separation)

Engineering Contradiction:
Improvenutrient contentVSAvoidstorage stability
Core Design Contradiction:
Quantity of substanceVSStability of the object's composition

Solution Approach 1:

The patent employs surfactants and stabilizing agents as intermediary substances that mediate between the nano clusters of nitrogen and phosphorus and the surrounding liquid medium. These intermediaries prevent direct interaction between nano clusters that would lead to agglomeration, while also maintaining solubility and distribution uniformity. The surfactants form protective layers around the nano clusters, acting as a barrier that prevents precipitation and phase separation during storage at elevated temperatures.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent creates a composite liquid fertilizer system that combines nano clusters of nitrogen and phosphorus with surfactants, stabilizing agents, and other auxiliary components. This composite formulation ensures that the high-concentration nano clusters remain dispersed and stable. The composite structure allows simultaneous achievement of high nutrient content (N>3%, P>6%) and storage stability by integrating multiple functional components that work synergistically to prevent agglomeration and precipitation.

Inventive Principle:
Principle #40Composite materials

2Productivity

If nano clusters are maintained at small sizes (<100 nm), then nutrient uptake efficiency is improved, but manufacturing precision and control deteriorate

Engineering Contradiction:
Improvenutrient uptake efficiencyVSAvoidparticle size control
Core Design Contradiction:
ProductivityVSManufacturing precision

Solution Approach 1:

The patent employs preliminary action by pre-forming nuclei or seed particles before the main nano cluster formation process. These pre-formed nuclei serve as templates that guide the subsequent growth of nano clusters, ensuring they remain within the desired size range (<100 nm). The preliminary preparation of reaction conditions, including pre-mixing of precursors and pre-adjustment of pH and temperature, also contributes to better particle size control during the actual nano cluster formation.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent utilizes mechanical vibration or ultrasonic treatment during the manufacturing process to control nano cluster size. The vibration energy prevents excessive growth of particles by continuously disrupting aggregation and maintaining uniform distribution. This mechanical input ensures that nano clusters remain in the optimal size range for high nutrient uptake efficiency while providing sufficient control over the manufacturing process.

Inventive Principle:
Principle #18Mechanical vibration

3Stability of the object's composition

If pH stability is maintained between 3-7, then chemical stability is improved, but manufacturing complexity increases

Engineering Contradiction:
ImprovepH stabilityVSAvoidmanufacturing complexity
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The patent employs parameter changes by adjusting pH as a key parameter during different stages of manufacturing and storage. The formulation is designed to maintain pH within the 3-7 range, which optimizes both chemical stability and nutrient availability. Buffering agents are incorporated to automatically resist pH changes, reducing the need for complex active control systems during storage and application.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent implements self-service through self-buffering mechanisms where the fertilizer formulation itself contains components that automatically maintain pH stability. The nano clusters and associated chemicals in the formulation act as a self-regulating system that resists pH drift without requiring external intervention. This self-buffering capacity simplifies manufacturing by reducing the need for complex pH control equipment and procedures.

Inventive Principle:
Principle #25Self-service

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 resulting liquid fertilizers demonstrate enhanced nutrient uptake and use efficiency, maintaining stability up to 50°C, with improved absorption and foliar spraying efficacy, and are eco-friendly with no adverse effects on beneficial agricultural organisms.

Implementation Method 1

A process involving the reaction of hydrolyzed urea with monoammonium phosphate

Methodology Applied
Scientific EffectHydrolysis: Hydrolysis

Implementation Method 2

the reaction of hydrolyzed urea with monoammonium phosphate in the presence of polyphosphates

Methodology Applied
Scientific EffectChemical Bonding: Chemical Bonding

Implementation Method 3

followed by treatment with polysorbates and polymers

Methodology Applied
Scientific EffectSurfactant: Surfactant

Implementation Method 4

treatment with polysorbates and polymers, results in stable nano clusters

Methodology Applied
Scientific EffectEmulsion: Emulsion

Implementation Method 5

demonstrate stability on storage at temperatures up to 50° C. wherein, the nano clusters do not agglomerate, precipitate or phase separate

Methodology Applied
Scientific EffectThermal stability:

Implementation Method 6

the pH of such compositions does not exhibit desired stability

Methodology Applied
Scientific EffectpH stability:

Data Source

PatentUS20260049043A1Stable NANO nitrogen-phosphorous containing fertiliser and method of manufacture thereof
Publication Date: 2026.02.19 INDIAN FARMERS FERTILISER COOPERATIVE LIMITED
  • US20260049043A1 patent drawing
  • US20260049043A1 patent drawing
  • US20260049043A1 patent drawing

AI summary

Stable liquid nano Nitrogen-Phosphorous Fertilisers are provided wherein nitrogen is in the range of 3-9% (w/w) and phosphorous (expressed in terms of P2O5) is in the range of 6-18% (w/w), wherein N:P (as P2O5) ratio ranges from 1:1 to 1:6. Sonicated urea in solution is judiciously reacted with Mono Ammonium Phosphate (MAP) followed by tailored treatment of the resulting nitrogen-phosphorous chemical entities with polysorbates and polymers, resulting in nano fertilisers having significant nitrogen & phosphorous uptake and use efficiency as compared to conventional bulk nitrogen-phosphorous fertilisers including DAP. The nano fertilisers exhibit stability at temperatures up to 50° C. without gelling. phase separation and precipitation during storage. The hydrodynamic diameter of the particles is less than 100 nm. with ph ranging between 3 and 7. These fertilisers increase vigour index of major crops such as paddy, groundnut and green gram upon seed treatment and also demonstrates significant field efficacy on paddy.