Urea Clathrate Barrier Layer for Moisture Agglomeration
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Solution Overview
Problem
Solid urea particles tend to agglomerate and clump due to their hygroscopic nature, which affects their flowability and compatibility with other fertilizers, requiring non-ambient conditions for treatment and using hazardous coating compositions.
Innovation Solution
A composition comprising water, a first aliphatic compound with a saturated straight chain hydrocarbon (C8-C14), and a second aliphatic compound with a saturated straight chain hydrocarbon (C15-C19) is applied to urea particles to form a urea clathrate barrier layer, reducing moisture-induced agglomeration under ambient conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional coating compositions containing organic solvents and petroleum distillates are used, then coating effectiveness is achieved, but safety hazards increase due to flammable and combustible components
Solution Approach 1:
The patent converts the harmful flammable and combustible properties of conventional coating compositions into a beneficial non-flammable water-based alternative. By replacing organic solvents and petroleum distillates with water as the primary carrier, the coating maintains its effectiveness in preventing urea particle agglomeration while eliminating fire and explosion hazards, making the process inherently safer for industrial application.
Solution Approach 2:
The patent changes the fundamental parameter of the coating composition from organic-based to water-based. This parameter change transforms the chemical nature of the coating medium, replacing flammable hydrocarbons with non-flammable water, thereby fundamentally altering the safety profile while maintaining the coating's functional properties through careful selection of surfactants and coating agents.
2Manufacturing precision
If non-ambient conditions with specialized pressure and temperature vessels are used for treatment, then coating quality is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent enables the coating process to proceed under ambient conditions by designing a self-sufficient coating composition that contains all necessary components (water, surfactants, coating agents) to achieve effective coating without requiring external pressure or temperature control systems. The composition itself provides the conditions needed for successful coating application.
Solution Approach 2:
The patent replaces the mechanical systems of pressure vessels and temperature control equipment with a chemically optimized water-based coating composition. Instead of using mechanical energy (pressure and heat) to achieve coating, the process relies on carefully selected chemical components that enable effective coating at ambient conditions, thereby eliminating complex mechanical infrastructure.
3Manufacturing precision
If mixing time is extended to at least 30 minutes as specified in prior art, then coating uniformity is improved, but productivity decreases
Solution Approach 1:
The patent changes the rheological parameters of the coating composition by using water as the carrier with specifically selected surfactants and coating agents. This parameter change improves the flow and distribution characteristics of the coating, enabling uniform coating to be achieved in significantly shorter mixing times compared to conventional viscous organic-based coatings.
Solution Approach 2:
The patent employs a water-based coating composition that is designed for rapid application and quick drying. The coating agents are selected to provide effective coverage with minimal residence time on the particle surface, allowing for faster processing cycles and higher productivity while maintaining coating uniformity through the inherent properties of the water-based formulation.
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 urea clathrate barrier layer effectively prevents agglomeration and dust formation, enhances flowability, and allows blending with other fertilizers without altering the critical relative humidity, using non-hazardous and easily applicable methods.
Implementation Method 1
the composition forms a urea clathrate barrier layer on solid urea particles
Data Source
AI summary
The present disclosure provides a composition for treating urea particles under ambient atmospheric conditions, a method for treating urea particles with the composition and to a fertiliser treated with the composition. The composition functions to reduce moisture induced agglomeration of treated urea particles compared to moisture induced agglomeration of untreated urea particles. The composition includes a solvent and a mixture of a first and a second aliphatic compound, each compound respectively comprising a selected C8-C14 saturated straight chain hydrocarbon a selected C15-C19 saturated straight chain hydrocarbon.