Carboxyl-Functionalized Adsorbent for Amine Isolation
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Solution Overview
Problem
Current methods for purifying amines from aqueous solutions, particularly from diluted solutions, are inefficient and require high energy, multiple solvents, and additional purification steps.
Innovation Solution
A method involving the use of an adsorbent functionalized with carboxyl groups to adsorb amines from aqueous solutions, followed by water removal and thermal desorption to obtain the amine in pure form.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If distillation methods are used to purify amines from aqueous solutions, then purification can be achieved, but high energy demand and complex additional purification steps are required
Solution Approach 1:
An adsorbent material functionalized with carboxyl groups serves as an intermediary substance that selectively binds amines from aqueous solutions. The adsorbent captures amines through acid-base interactions, allowing separation without energy-intensive distillation. After adsorption, the adsorbent can be regenerated by simple heating to release concentrated amine, eliminating the need for complex purification steps while reducing energy consumption.
Solution Approach 2:
The invention changes the separation parameter from thermal-based (distillation requiring high energy) to chemical-based (adsorption through carboxyl group interactions). By modifying the adsorbent with carboxyl functional groups, the system exploits chemical affinity differences to achieve selective amine capture at lower temperatures, then releases amines through controlled thermal desorption, significantly reducing overall energy demand while maintaining high purity.
2Manufacturing precision
If multiple solvents and additional purification steps are used, then high purity amine can be obtained, but the process complexity and solvent usage increase
Solution Approach 1:
The carboxyl-functionalized adsorbent acts as a selective intermediary that captures amines from aqueous solutions through specific acid-base interactions. This single-step adsorption process replaces multiple purification steps and solvent systems. The adsorbent can be easily regenerated by heating, providing a simple two-step process (adsorption followed by thermal desorption) that achieves high purity without complex equipment or multiple solvents.
Solution Approach 2:
The invention extracts amines from aqueous solutions using a solid adsorbent phase, separating the amine component directly from the aqueous matrix. This extraction approach using carboxyl-functionalized materials selectively removes amines in one step, eliminating the need for multiple liquid-liquid extraction steps or complex chromatographic purifications, thereby simplifying the overall process while maintaining high purity.
3Quantity of substance
If conventional purification methods are used for diluted amine solutions, then amine can be recovered, but the economic efficiency decreases due to high energy and solvent costs
Solution Approach 1:
The carboxyl-functionalized adsorbent serves as an economical intermediary that efficiently captures amines from diluted solutions. The adsorbent can be regenerated and reused multiple times through simple heating, reducing both solvent consumption and energy costs compared to conventional methods. This reusable adsorption-desorption cycle provides high amine recovery yields while significantly improving economic efficiency by eliminating the need for expensive solvents and energy-intensive continuous purification.
Solution Approach 2:
The invention changes the recovery parameter from thermal separation (distillation requiring high energy input proportional to solution volume) to chemical adsorption (which is effective even for diluted solutions). The carboxyl groups provide selective binding that works efficiently at low amine concentrations, enabling economical recovery from diluted streams without the prohibitive energy costs of conventional thermal methods, thereby improving both yield and economic efficiency.
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
This method provides economical access to high-purity amines with lower energy demand, reduced solvent usage, and higher yield, while eliminating the need for additional solvent separation steps.
Implementation Method 1
contacting the aqueous solution of the amine with an adsorbent functionalized with carboxyl groups
Implementation Method 2
removing water from the adsorbent
Implementation Method 3
thermally desorbing the amine
Data Source
Figure 1a~1b
Figure 2
AI summary
There is provided a method for the isolation of an amine from an aqueous solution thereof, comprising the steps of: a) contacting the aqueous solution of the amine with an adsorbent functionalized with carboxyl groups; b) removing water from the adsorbent; and c) thermally desorbing the amine. The method is particularly suitable for the isolation of ethanolamine.