Aromatic Eutectic Solvent Compositions for Safer Liquid-Liquid Separation
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Solution Overview
Problem
Existing organic solvents used in liquid-liquid and solid-liquid extractions are highly flammable, volatile, and pose safety and environmental risks, while traditional eutectic solvents have limited affinity for aromatic molecules.
Innovation Solution
Development of aromatic and polyaromatic eutectic solvent compositions comprising compounds like di-tert-butyl-benzenes, biphenyls, polycyclic aromatic hydrocarbons, fluorenes, and carbazoles, which have a melting point above 60°C individually but form a eutectic mixture with a lower melting point, suitable for use as solvents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional organic solvents are used for extraction, then extraction efficiency is maintained, but safety risks increase due to high flammability and low flash points
Solution Approach 1:
The patent changes the physical and chemical parameters of the solvent system by creating eutectic mixtures of aromatic compounds. These mixtures have flash points above 100°C, significantly higher than traditional organic solvents, thereby reducing flammability while maintaining extraction efficiency through optimized compositional parameters
Solution Approach 2:
The invention uses composite eutectic mixture compositions comprising multiple aromatic compounds (such as diphenyl ether, naphthalene, and other polyaromatic hydrocarbons) in specific ratios. This composite approach achieves superior safety properties and extraction performance compared to single-component solvents
2Reliability
If traditional eutectic solvents are used, then safety is improved with higher flash points, but affinity for aromatic molecules decreases
Solution Approach 1:
The patent optimizes the local chemical quality of the solvent mixture by selecting specific aromatic compounds with complementary properties. The eutectic mixture comprises compounds with different aromatic characteristics that collectively enhance affinity for aromatic analytes while maintaining high flash points, achieving localized optimization of both safety and selectivity
Solution Approach 2:
The invention adjusts the compositional parameters of the eutectic mixture to optimize the balance between safety and aromatic affinity. By varying the ratios of components such as diphenyl ether, naphthalene, and other aromatic hydrocarbons, the solvent system achieves peak performance in both flash point and extraction efficiency for aromatic compounds
3Stability of the object's composition
If individual aromatic compounds with melting points above 60°C are used, then structural stability is maintained, but liquid state at room temperature cannot be achieved
Solution Approach 1:
The patent combines multiple aromatic compounds that individually have melting points above 60°C into eutectic mixtures. The merging of these compounds in specific ratios creates a synergistic effect where the mixture exhibits a depressed melting point and remains liquid at room temperature, while each component maintains its structural stability and aromatic characteristics
Solution Approach 2:
The invention exploits the phase transition behavior of aromatic compounds by forming eutectic systems. The phase diagram of the mixture shows a eutectic point with lower melting temperature than any individual component, allowing the composition to remain in liquid state at room temperature while preserving the structural integrity of aromatic molecules
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 eutectic solvent compositions are safer, with flash points above 100°C, effectively extracting aromatic compounds, and demonstrate superior performance in liquid-liquid separation compared to toluene.
Implementation Method 1
In liquid-liquid extraction, one or more substances dissolved in a solvent (feed phase, usually aqueous) is extracted using another solvent (extraction solvent phase, usually organic) in which it is more soluble. The initial solvent and the extraction solvent must not be miscible. This technique is based on the differential solubility of the substances to be extracted in two immiscible liquid phases.
Implementation Method 2
The extraction medium is not or only slightly miscible with the main components of the initial mixture, and the compound to be extracted has more affinity with the extraction medium than with the main components of the initial mixture.
Data Source
AI summary
This disclosure concerns aromatic and polyaromatic eutectic mixtures and their uses as solvents, particularly in liquid-liquid separation. The mixtures may include compounds including di-tert-butyl-benzenes, biphenyls and terphenyls, polycyclic aromatic hydrocarbons selected from naphthalenes, acenaphthenes, anthracenes and pyrenes, fluorenes and carbazoles, 2,5-Diphenyloxazoles, compounds of formula (I), triphenylmethane, tribenzylamine, and 2,5-dibenzylphenol.