Ionic Liquid Absorbent for Methylacrolein Separation
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Solution Overview
Problem
Current methods for absorbing methylacrolein, such as using water or methanol, result in high water consumption, environmental pollution, and volatility issues, failing to effectively separate and purify the product due to azeotrope formation and high solubility limitations.
Innovation Solution
Employing a recyclable and environmentally friendly ionic liquid as an absorbent, which can be used alone or in combination with water or alcohol to enhance solubility and selectivity, and is regenerable with low vapor pressure, overcoming viscosity issues and improving absorption efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If water is used as an absorbent for methylacrolein, then the absorption process is simple, but the solubility of methylacrolein in water is low requiring large amounts of water and the product forms an azeotrope that is difficult to purify
Solution Approach 1:
The patent changes the chemical composition parameter of the absorbent from traditional water or organic solvents to ionic liquid, which has different solubility characteristics. The ionic liquid provides high solubility for methylacrolein without forming difficult-to-separate azeotropes, thereby reducing the quantity of absorbent needed while maintaining process simplicity.
2Productivity
If methanol is used as an absorbent for methylacrolein, then the absorption efficiency is high, but methanol has high volatility causing environmental pollution and safety issues
Solution Approach 1:
The patent changes the physical and chemical parameters of the absorbent by using ionic liquid instead of volatile organic solvents like methanol. The ionic liquid has negligible vapor pressure, eliminating volatility-related pollution and safety hazards while maintaining high absorption efficiency for methylacrolein.
3Reliability
If traditional absorbents are used for methylacrolein, then the process is well-established, but the absorbents are harmful to environment and human beings
Solution Approach 1:
The patent changes the chemical composition parameter of the absorbent from toxic traditional solvents to environmentally benign ionic liquid. The ionic liquid maintains process reliability and stability while being non-toxic and environmentally friendly, thus eliminating the harmful effects associated with conventional absorbents.
4Ease of operation
If water or traditional solvents are used as absorbents, then the separation process is straightforward, but the product forms an azeotrope that cannot satisfy the demand of oxidation and esterification reaction
Solution Approach 1:
The patent changes the solvent composition parameter to ionic liquid, which alters the phase behavior and solubility characteristics of the system. This prevents azeotrope formation between the absorbent and methylacrolein, enabling easier separation and achieving the high product purity required for subsequent oxidation and esterification reactions.
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 ionic liquid absorbent achieves high absorption efficiency, reduces waste, and allows for easy separation and regeneration, providing a more sustainable and cost-effective process for methylacrolein absorption.
Implementation Method 1
absorbing methylacrolein with an absorbent comprising an ionic liquid
Implementation Method 2
The ionic liquid has a larger solubility for the component to be separated (methylacrolein) in the mixing gas
Implementation Method 3
The ionic liquid is very low or almost zero in terms of vapor pressure, therefore, the loss caused by volatilization during adsorption and regeneration is tiny
Data Source
AI summary
Disclosed is a process for absorbing methylacrolein, characterized in that it absorbs methylacrolein by an absorbent comprising an ionic liquid. The absorbent can absorb methylacrolein effectively, and it is easy to be separated from methylacrolein, regenerated and recycled. It is a green absorbent. The technique is a green methylacrolein absorbing and separating technique.