Woven Polymer Mats for High-Flow Ion Exchange Chromatography
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Solution Overview
Problem
Existing ion exchange chromatography columns face challenges with reduced column productivities due to slower mass transport and flow rates, reliance on diffusion-based mass transfer, and the need for capital-intensive purification steps, along with issues like resin fouling and attrition, which affect the efficiency and durability of bead-based systems.
Innovation Solution
The use of modified woven or non-woven polymer mats with enhanced surface chemistry for chromatography separation, which can be configured as disks or spirals, providing improved binding capacity and flow rates, and are processed into cartridges with epoxy seals to enhance column performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resin beads are used in ion exchange chromatography columns, then ion exchange selectivity is achieved, but column productivity is reduced due to slower mass transport and flow rates
Solution Approach 1:
The patent employs porous monoliths with controlled pore structures as the stationary phase support. These porous materials provide high surface area for functional group attachment while enabling rapid mass transport through convective flow, resolving the contradiction between selectivity and productivity by decoupling the binding function from the transport limitation inherent in bead-based systems
Solution Approach 2:
The patent uses composite structures combining monolithic supports with ion exchange functional groups. The monolith provides a continuous porous matrix for efficient flow and mass transport, while the grafted ion exchange groups provide selectivity, creating a composite material that simultaneously achieves both high productivity and reliable ion exchange performance
2Manufacturing precision
If sufficiently long residence times are used to allow target solutes to diffuse into bead-based resin systems, then separation efficiency is improved, but flow rates are reduced
Solution Approach 1:
The patent replaces the diffusion-based mass transport mechanism inherent in bead systems with convective flow through porous monolith channels. This substitution of the mass transport mechanism eliminates the need for long residence times, enabling both high flow rates and efficient separation to occur simultaneously
3Reliability
If traditional bead-based ion exchange systems are used, then ion exchange function is provided, but attrition occurs due to swelling and osmotic shock
Solution Approach 1:
The patent uses monolithic porous structures with interconnected channels that accommodate volume changes during ion exchange cycles. The continuous monolithic structure lacks the internal pores and particle boundaries of beads, eliminating swelling stress concentrations and osmotic shock effects that cause attrition, thereby maintaining both ion exchange function and structural durability
Solution Approach 2:
The patent creates composite materials where ion exchange functional groups are grafted onto a robust monolithic support framework. This composite structure provides the chemical functionality needed for ion exchange while the monolithic framework resists mechanical degradation from swelling and osmotic shock, solving the durability problem
4Quantity of substance
If ion exchange processes are used for complex feeds with similar solutes, then target solute extraction is achieved, but capital and time-intensive purification steps are required
Solution Approach 1:
The patent employs monoliths with tunable pore size distributions, surface chemistries, and functional group densities that can be optimized for specific solute separations. By changing these parameters, the monolith achieves high selectivity for target solutes even in complex feeds, reducing or eliminating the need for additional purification steps and simplifying the overall process
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 solution achieves higher volumetric flow rates, reduced pressure drops, and improved purity with 100% retention, minimizing channeling and resin loss, while increasing productivity and reducing operational costs.
Implementation Method 1
Ion exchange chromatography is a technique capable of separating compounds based on their net charge. The media used in the chromatography column contains either positively or negatively charged functional groups bound to a solid surface support yielding either a cation or anion exchanger. The compounds passed through the column are retained or absorbed by an ion having the opposite charge
Implementation Method 2
The present disclosure relates to materials and methods for the extraction and purification of target analytes from a mixture. In particular, the present disclosure relates to modified woven or non-woven polymer mats having a surface chemistry to improve the binding capacity of the target analytes
Data Source
AI summary
Disclosed are materials and methods for the extraction and purification of target analytes using chromatography techniques. The materials may comprise woven or non-woven polymer mats functionalized with a selected surface chemistry and formed into cartridges for use in chromatography techniques.