Solvent Drying Composition Using Immiscible Phase Separation
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Solution Overview
Problem
Existing solvent drying processes are energy-intensive and time-consuming, and the Jessop method faces challenges in dissociating CO2 from amine, leading to slow recovery kinetics and residual solubilization.
Innovation Solution
A solvent drying solution comprising C1-C7 alkylamines, quaternary ammonium compounds, carboxylic acids, or alkylsulfonic acids, combined with specific ethers, alcohols, ketones, and esters, which are immiscible with aqueous solutions, allowing for efficient water release and recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional solvent drying processes are used, then water can be removed from solvent mixtures, but the process is energy-intensive and time-consuming
Solution Approach 1:
The patent introduces a draw solution containing salts (such as calcium chloride, magnesium sulfate, or sodium sulfate) as an intermediary substance. This draw solution selectively binds water molecules from the solvent mixture through solvation, forming immiscible aqueous layers that separate from the organic solvent phase. This intermediary mechanism enables water removal without direct heating or energy-intensive distillation, dramatically reducing energy consumption while maintaining high drying efficiency
Solution Approach 2:
The invention exploits phase separation between immiscible liquid phases. The draw solution forms distinct aqueous layers that separate from the organic solvent phase based on density and solubility differences. This phase transition approach allows water to be selectively transferred to the aqueous phase without requiring thermal energy input, achieving rapid and energy-efficient solvent drying
2Reliability
If the Jessop method using CO2 and amine is used, then reversible water solution can be formed, but CO2 dissociation from amine is slow and trace amounts remain solubilized
Solution Approach 1:
The patent changes the chemical parameters of the system by replacing the CO2-amine reversible system with a salt-based draw solution system. The salts (calcium chloride, magnesium sulfate, sodium sulfate) have high water affinity and form stable solvates, enabling complete water removal without residual solubilization. This parameter change eliminates the slow dissociation kinetics inherent in the Jessop method while achieving reliable and complete water separation
Solution Approach 2:
The draw solution acts as a disposable or regenerable component that can be easily separated from the dried solvent. After water removal, the draw solution can be regenerated by simple heating or evaporation to remove the bound water, allowing the salt to be reused. This approach eliminates the time-consuming CO2 dissociation step while maintaining complete water removal effectiveness
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 solution enables rapid and energy-efficient water removal from solvent mixtures, forming immiscible layers for easy separation, facilitating continuous recovery and recycling with minimal energy input.
Implementation Method 1
The solution enables rapid and energy-efficient water removal from solvent mixtures, forming immiscible layers for easy separation
Implementation Method 2
forming immiscible layers for easy separation
Data Source
AI summary
The present disclosure relates to a solvent drying solution and processes therefor. The present disclosure more specifically relates to a solvent drying solution that in use releases water from a solvent mixture. The present disclosure also relates to a process for recovering a solvent drying solution, more specifically to a process for recovering a solvent drying solution by using an osmotic process.