Enantioseparation via Eutectic Shift and Crystallization
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Solution Overview
Problem
Current methods for separating racemates, particularly chiral systems with compound formation, require significant energy and time due to the need for initial enantiomeric enrichment and are inefficient for the majority of chiral substances that are not conglomerate forming systems.
Innovation Solution
A method involving placing a chiral system in the 3-phase region of the ternary phase diagram to establish solid/liquid phase equilibria, followed by shifting the eutectic composition to the 2-phase region for selective crystallization to obtain the target enantiomer, allowing for efficient separation with minimal initial enrichment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If initial enantiomeric enrichment is performed to achieve further separation, then the purity of target enantiomer is improved, but energy consumption and processing time increase significantly
Solution Approach 1:
The method performs preliminary action by shifting the eutectic composition to the 2-phase region before crystallization, creating favorable thermodynamic conditions in advance. This preliminary shift to the 2-phase region enables subsequent selective crystallization to proceed more efficiently, reducing the need for extensive initial enrichment and thereby lowering energy consumption while maintaining high purity
Solution Approach 2:
The invention changes thermodynamic parameters by shifting the eutectic composition from the 3-phase region to the 2-phase region. This parameter change fundamentally alters the phase behavior of the system, enabling selective crystallization of the target enantiomer with minimal initial enrichment, thus resolving the contradiction between purity and energy consumption
2Manufacturing precision
If initial enantiomeric enrichment is performed to achieve further separation, then the purity of target enantiomer is improved, but processing time increases significantly
Solution Approach 1:
The method performs preliminary action by shifting the eutectic composition to the 2-phase region before crystallization, creating favorable thermodynamic conditions in advance. This preliminary shift enables subsequent selective crystallization to proceed more efficiently, reducing the time required for enrichment while achieving high purity of the target enantiomer
Solution Approach 2:
The invention changes thermodynamic parameters by shifting the eutectic composition from the 3-phase region to the 2-phase region. This parameter change fundamentally alters the phase behavior, enabling rapid selective crystallization with minimal initial enrichment, thus resolving the contradiction between purity and processing time
3Manufacturing precision
If conventional separation methods are used for compound forming systems, then separation can be achieved, but the method is inefficient and requires significant initial enrichment
Solution Approach 1:
The invention fundamentally changes the thermodynamic parameters of the system by shifting the eutectic composition from the 3-phase region to the 2-phase region. This parameter change transforms the phase behavior from compound-forming to eutectic behavior, enabling efficient selective crystallization of the target enantiomer without requiring significant initial enrichment, thus resolving the contradiction between separation efficiency and productivity
Solution Approach 2:
The method exploits phase transitions by shifting the eutectic composition to the 2-phase region, where selective crystallization can occur. This phase transition approach enables the target enantiomer to crystallize selectively from the solution, achieving high separation efficiency and productivity without requiring extensive initial enrichment
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 enables the production of optically pure enantiomers with reduced energy and time requirements, is thermodynamically stable, and can operate continuously, achieving high yields with minimal initial enrichment, suitable for the majority of chiral systems.
Implementation Method 1
placing the chiral system to be processed, which is optically enriched by a target enantiomer in the 3-phase region of the ternary phase diagram of chiral compound forming systems to achieve the establishment of the solid/liquid phase equilibria
Implementation Method 2
performing crystallisation in the outer 2-phase region of the ternary phase diagram for obtaining the target enantiomer in the solid phase
Data Source
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AI summary
Method for enantioseparation of a chiral system with compound formation comprising a pair of enantiomers. The method comprises the steps of: placing the chiral system to be processed, which is optically enriched by a target enantiomer, in the 3-phase region (20) of the ternary phase diagram of chiral compound forming systems to achieve the establishment of the solid/liquid phase equilibria; phase-separating the liquid and solid phase formed by the placing step; shifting the eutectic composition of the remaining liquid towards a lower eutectic composition (xE) until the overall composition is located in the 2-phase region (15) of the ternary phase diagram of chiral compound forming systems; and performing crystallisation in the 2-phase region (10) of the ternary phase diagram for obtaining the target enantiomer in the solid phase. In some cases the shifting step can be skipped.