Choline-Based Ionic Liquids for Aircraft Deicing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional deicing formulations for aircraft and runway surfaces often have high toxicity and significant environmental impact due to their chemical composition, leading to ecological damage from runoff.
Innovation Solution
Development of room temperature ionic liquids composed of naturally occurring ions, specifically choline-based ionic liquids produced by dissolving choline chloride in methanol, passing through an ion exchange resin, reacting with carboxylic or amino acids, and removing by-products through evaporative distillation, resulting in eco-friendly deicing compositions like choline formate, choline acetate, and choline amino acid salts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional deicing formulations are used, then effective ice melting is achieved, but high toxicity and environmental damage occur
Solution Approach 1:
The patent changes the chemical composition parameters of deicing fluids by using ionic liquids with specific cations (choline, amino acids) and anions (formate, acetate, propionate) that have inherently lower toxicity. This parameter change maintains ice melting effectiveness while reducing environmental harm through biodegradability and lower biochemical oxygen demand.
Solution Approach 2:
The patent employs composite ionic liquid formulations combining multiple naturally-derived ions to create deicing compositions that achieve both effective ice melting and reduced environmental impact. These composite materials leverage the synergistic properties of different ionic components to balance performance and ecotoxicity.
2Reliability
If conventional deicing formulations are used, then ice melting performance is maintained, but significant biochemical oxygen demand is generated
Solution Approach 1:
The patent modifies the chemical structure parameters of deicing agents by selecting ionic liquids with carboxylic acid anions (formate, acetate, propionate) that exhibit superior biodegradability. This parameter change reduces biochemical oxygen demand while preserving the ice melting performance through appropriate ion selection and formulation optimization.
3Productivity
If toxic deicing chemicals are used, then effective ice removal is achieved, but ecological damage increases
Solution Approach 1:
The patent changes the toxicity parameters of deicing chemicals by using ionic liquids derived from naturally occurring ions with proven low ecotoxicity. This parameter change enables effective ice removal while minimizing ecological damage through the inherent biocompatibility of the ionic components.
Solution Approach 2:
The patent employs biodegradable ionic liquids that naturally decompose in the environment, effectively treating them as environmentally benign, short-lived substances that perform their deicing function and then break down without persistent ecological harm.
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 choline-based ionic liquids effectively melt ice with reduced environmental impact, as they are less toxic and completely soluble in water, minimizing biochemical oxygen demand and providing a more sustainable deicing solution.
Implementation Method 1
passed through an ion exchange resin to effect replacement of chloride with hydroxide
Implementation Method 2
The by-product water and solvent are removed by evaporative distillation to provide the pure ionic liquids
Implementation Method 3
Ionic liquids (ILs) with low toxicity are effective in melting ice from aircraft wings and fuselage surfaces
Data Source
AI summary
A process and deicing composition.