Simulated Moving-Bed Chromatography Separation Precision
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Solution Overview
Problem
Conventional simulated moving-bed type chromatographic separation methods face challenges in achieving high-purity separation and purification of specific components due to limitations in feed solution and eluent supply positioning and timing, leading to insufficient separation of purification target substances.
Innovation Solution
The method involves a circulation system with three or more unit packed columns connected in series, where the system is divided into annular sections for separating weakly, intermediately, and strongly adsorptive components by controlling the supply of the feed solution and eluent, and shifting extraction positions to enhance purification efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional simulated moving-bed type chromatographic separation methods are used, then the system can perform continuous separation of components, but the purification precision of target substances is insufficient due to limitations in feed solution and eluent supply positioning and timing
Solution Approach 1:
The circulation system is divided into multiple sections (first section, second section, third section, etc.) with specific functional assignments. Each section handles specific separation tasks for different fractions (weakly adsorptive, intermediately adsorptive, strongly adsorptive), enabling precise control of separation processes and improving purification precision through segmented operational control
Solution Approach 2:
The system implements dynamic shifting of extraction positions and supply positions along the circulation path. The extraction position of the intermediately adsorptive fraction is specifically adjusted to be shifted by a predetermined number of sections, and the feed solution supply position is dynamically controlled to optimize separation efficiency and purification precision
2Productivity
If the extraction position of the intermediately adsorptive fraction is not shifted, then the operational control is simpler, but the separation efficiency and purity of the target substance are insufficient
Solution Approach 1:
The system pre-establishes the extraction position of the intermediately adsorptive fraction to be shifted by a predetermined number of sections relative to other positions. This preliminary positioning arrangement optimizes the separation process before operation begins, enabling efficient continuous separation while maintaining manageable operational control through pre-configured positional relationships
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 approach allows for high-purity fractionation of purification target components by optimizing the supply and extraction positions within the chromatographic separation system, improving the overall separation efficiency and purity of the target substances.
Implementation Method 1
an adsorbent having a selective adsorption ability with respect to a specific component of two or more components contained in a feed solution
Implementation Method 2
supplying an eluent for desorbing the intermediately adsorptive component
Data Source
AI summary
A simulated moving-bed type chromatographic separation method including: using a circulation system in which three or more unit packed columns each filled with an adsorbent are connected in series, dividing the circulation system into at least three-sections annularly continuous from an upstream side to a downstream side so that each section has at least one of the unit packed columns, and separating, by using an eluent, a weakly, a strongly, and an intermediately adsorptive component having adsorption performance on the adsorbent, which performance is intermediate between the previous two components, the weakly, strongly, and intermediately adsorptive components being included in a feed solution, wherein positions of supplying the feed solution, extracting the weakly adsorptive fraction, extracting the intermediately adsorptive fraction, and extracting the strongly adsorptive fraction have a specific relationship. A chromatographic separation system carries out the chromatographic separation method.