Three-Zone Simulated Moving Bed Chromatography for Valine Separation
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Solution Overview
Problem
Current methods for separating valine from mixtures containing amino acids like leucine and isoleucine are inefficient, generating excessive wastewater, requiring complex post-treatment processes, and increasing operational costs due to the need for multiple columns and solvents in simulated moving bed chromatography processes.
Innovation Solution
A three-zone simulated moving bed chromatography process with three rotary valves and chromatography zones, where the Desorbent, Feed, Raffinate, and Extract ports are connected through rotary valves to prevent dilution and reduce solvent usage, allowing continuous separation of valine with high purity and yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional four-zone SMB chromatography is used for continuous separation of valine, then separation efficiency is improved, but the number of columns increases to at least four, increasing device complexity and cost
Solution Approach 1:
The conventional four-zone SMB chromatography is segmented into three functional zones: adsorption zone (column 1), desorption zone (column 2), and mixing zone (column 3). This segmentation allows the system to achieve continuous separation with fewer columns by optimizing the function distribution across each zone.
Solution Approach 2:
The system employs dynamic switching of port connections through rotary valves that periodically change the flow paths. This dynamic reconfiguration allows the three-column system to simulate the behavior of a four-zone SMB process, maintaining separation efficiency while reducing the number of columns.
2Manufacturing precision
If ion exclusion-chromatography method is used for valine separation, then separation capability is improved, but a lot of waste water is generated and post-treatment processes are additionally needed
Solution Approach 1:
The system changes the mobile phase from conventional buffers to water, eliminating buffer waste and associated environmental problems. This parameter change maintains separation capability through optimized adsorption-desorption cycles while completely avoiding buffer-related wastewater generation.
3Manufacturing precision
If crystallization method using precipitant is used for valine purification, then purification capability is improved, but the process becomes complex and post-treatment processes are additionally needed
Solution Approach 1:
The method extracts and removes impurities (leucine, isoleucine, alanine) from the valine-containing fermentation broth through selective adsorption in the chromatography columns. By taking out impurities directly in the main process rather than adding precipitants, the system achieves purification without the complexity of post-treatment removal steps.
4Manufacturing precision
If chemical reaction method is used for valine separation, then separation capability is improved, but the process is complex and utilizes lot of solvents, increasing costs
Solution Approach 1:
The system uses water as a disposable mobile phase that can be continuously circulated and easily replaced. This cheap, environmentally friendly solvent replaces complex chemical reagents, reducing both solvent usage costs and environmental impact while maintaining separation capability.
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 process achieves continuous separation of valine with high purity (90-99%) and yield (98% or more) while minimizing the number of columns and solvent usage, reducing operational costs and environmental impact.
Implementation Method 1
a matter of note is that impurities are also obtained along with valine during the fermentation procedure. These impurities include salt, alanine, leucine, isoleucine, etc., and all of these impurities are required to be separated from valine
Data Source
Figure 1~4a
Figure 4b~4c
Figure 5(a)~5(d)
AI summary
The present invention relates to an apparatus for continuous separation of valine from the mixture comprising amino acids such as leucine, isoleucine, etc. and a method for continuous separation of valine by using the same, and the present invention can continuously separate valine from the mixture comprising amino acids such as leucine, isoleucine, etc. in a high purity and yield.