Gradient Elution Chromatography for Synchronized Fraction Recycling
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Solution Overview
Problem
Existing chromatography methods, particularly multicolumn countercurrent solvent gradient purification (MCSGP), suffer from inefficiencies such as discontinuous feed loading, lack of synchronization between steps, and high product loss due to slow column loading and diffusion processes, leading to low productivity.
Innovation Solution
A method involving repeated loading of feed solution onto a chromatography matrix, with alternating matrices and collection of specific elution fractions, including optional dilution and concentration adjustments, to enhance product separation and reduce loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If narrow product fractionation is used to achieve high purity, then product purity is improved, but product loss increases due to the bell-shaped elution profile
Solution Approach 1:
The patent divides the elution process into multiple discrete fractions (first fraction, second fraction, third fraction) collected at different time points. This segmentation allows the product to be collected in multiple separate fractions rather than losing it in a single narrow window, thereby reducing overall product loss while maintaining high purity through selective collection of fractions containing the product peak
Solution Approach 2:
The patent performs preliminary concentration of the product from the collected fractions by adjusting the concentration of the combined fractions. This preliminary action ensures that even though the product is distributed across multiple fractions, it can be recovered at high concentration and purity, offsetting the dilution effect of fractionation
2Productivity
If continuous chromatography is used to improve productivity, then production speed is improved, but synchronization between feed loading and elution steps becomes difficult, leading to process inefficiency
Solution Approach 1:
The patent employs periodic action by repeatedly cycling through the steps of loading feed solution, applying elution solution, and collecting fractions multiple times (at least twice, preferably more). This periodic repetition allows the system to maintain continuous operation while synchronizing the periodic loading and elution steps, improving overall productivity without sacrificing process efficiency
Solution Approach 2:
The patent achieves continuity of useful action by operating multiple chromatography matrices in parallel and continuously cycling through load-elute-collect steps. While one matrix is being eluted, another is being loaded, ensuring that the system never idle and maintaining continuous productive action throughout the process
3Manufacturing precision
If multiple chromatography matrices are used to improve separation efficiency, then purification quality is improved, but device complexity increases
Solution Approach 1:
The patent uses multiple chromatography matrices (first matrix, second matrix, third matrix) operated in parallel to perform separation simultaneously. This segmentation of the separation function across multiple independent matrices improves purification quality by allowing each matrix to handle specific fractions, while the modular nature keeps individual matrix complexity low
Solution Approach 2:
The patent employs universal chromatography matrices that can perform multiple functions: loading feed solution, separating product from impurities, and generating collectable fractions. Each matrix is designed to be multi-functional, reducing the need for specialized components and thereby reducing overall device complexity despite using multiple matrices
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 improves productivity by synchronizing feed loading and elution, reduces product loss, and enhances the efficiency of chromatography processes.
Implementation Method 1
a method of separating a product of interest from impurities comprising the following steps in the indicated order: (1) loading on a chromatography matrix a first volume of a feed solution comprising the product of interest and impurities; (2) contacting the chromatography matrix with an elution solution
Implementation Method 2
contacting the chromatography matrix with an elution solution; wherein the concentration of an eluent comprised in the elution solution is increased over time during step (2) and wherein the eluent weakens the interaction between the product of interest and the chromatography matrix
Data Source
AI summary
The present invention relates to a method for separating a product of interest from impurities and an apparatus for performing the method. The method comprises the steps in the indicated order: (1) loading on a chromatography matrix a first volume of a feed solution comprising the product of interest and impurities; (2) contacting the chromatography matrix with an elution solution; (3) collecting a) optionally an elution fraction 1 (EF1) in a side fraction container (SFC), b) an elution fraction 2 (EF2) in a product container, and c) optionally an elution fraction 3 (EF3) in a SFC, wherein at least one of EF1 and EF3 is collected; (4) loading on a chromatography matrix EF1 and/or EF3 and a second volume of the feed solution simultaneously or subsequently. Steps (2) to (4) are repeated at least once, and the chromatography matrices of step (1) and (4) are the same or different.