Chromatography Column Switching via Pressure-Based Saturation Detection
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Solution Overview
Problem
Existing methods for determining chromatography column binding capacity are tedious and laborious, especially under varying process conditions, and continuous chromatography systems face complexity due to variability in column identity and feed composition, making it difficult to operate efficiently at large scale.
Innovation Solution
A method and system for monitoring chromatography column saturation using pressure measurements, allowing real-time control of chromatography processes by comparing inlet pressures of unloaded and loaded columns, and adjusting for column differences and feed variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional breakthrough capacity measurement methods are used with continuous monitoring of effluent concentration, then binding capacity can be determined, but the process becomes tedious and laborious especially under varying process conditions
Solution Approach 1:
The patent replaces complex chemical analysis systems (HPLC, continuous effluent monitoring) with a simple pressure measurement system. Pressure sensors monitor the pressure difference across the chromatography column, and when this pressure exceeds a predetermined threshold, breakthrough is detected. This mechanical substitution dramatically simplifies the measurement system while maintaining measurement capability.
Solution Approach 2:
The patent uses simple, inexpensive pressure sensors instead of expensive, complex analytical instrumentation. The pressure measurement approach uses readily available components that are far cheaper than HPLC systems or continuous UV-Vis monitoring equipment, making the measurement process both simpler and more cost-effective.
2Adaptability or versatility
If feed concentration varies randomly during chromatography operation, then process flexibility is maintained, but true breakthrough capacities become impossible to measure
Solution Approach 1:
The patent implements a feedback control system where pressure measurements from the column are continuously monitored and fed back to the control system. When the pressure difference exceeds the predetermined threshold indicating breakthrough, the system automatically responds by adjusting flow rates or switching columns. This feedback mechanism enables accurate breakthrough detection even when feed concentration varies randomly, maintaining both process flexibility and measurement precision.
3Productivity
If multiple identical columns are used in continuous chromatography, then productivity increases, but system complexity increases due to column identity variability and feed composition changes
Solution Approach 1:
The patent creates a universal control system that can manage multiple chromatography columns simultaneously using the same pressure-based breakthrough detection methodology. The predetermined pressure threshold approach is universally applicable to any column in the system, regardless of minor variations in column identity or feed composition. This universal approach simplifies the control of multi-column continuous chromatography systems while maintaining high productivity.
Solution Approach 2:
The patent changes the detection parameter from chemical concentration (which varies with feed composition) to physical pressure (which provides a consistent breakthrough indicator). By monitoring pressure differences across columns and comparing against predetermined thresholds, the system can reliably detect breakthrough in multiple columns simultaneously without being affected by feed composition variability, thereby simplifying complex continuous chromatography operations.
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
Enables reliable and dynamic monitoring of column saturation, facilitating efficient operation of continuous chromatography systems by compensating for column and feed inconsistencies, thereby optimizing process efficiency and reducing product loss.
Implementation Method 1
A first pressure is measured with a pressure sensor at the inlet of an unloaded column; A second pressure is measured with the pressure sensor at the inlet of a loaded column
Data Source
AI summary
Certain embodiments of the invention provides a method for monitoring level of saturation of a chromatography media in a column, which method comprises measuring a first pressure at the inlet of an unloaded column; measuring a second pressure at the inlet from a loaded column; and comparing the first and second pressure measurement of determine the level of saturation of the chromatography media. Embodiments of the invention also provide related methods for controlling a chromatography system and methods for controlling a periodic counter current chromatography system, as well as a chromatography system suitable for use with the novel methods.