Simulated Moving Bed for Glucose Fructose Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing chromatographic processes for separating glucose and fructose are inefficient, leading to high resin consumption, excessive eluent water usage, and poor separation quality due to idle resin, displacement zones, and engineering drawbacks such as axial dispersion and column geometry limitations.
Innovation Solution
A continuous ion exchange process utilizing a strongly acidic cation exchanger resin, which employs a new mass transfer method that eliminates the displacement zone by retaining the resin in a semi-dry status and utilizing a differential setup between the resin and liquid phases, along with an apparatus comprising multiple modules for efficient liquid distribution and separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional chromatographic process is used for separating glucose and fructose, then separation is achieved through mass transfer zone, but resin consumption is excessive because only a small portion of resin is actively contributing to separation at any instance
Solution Approach 1:
The patent implements a simulated moving bed system where resin and feed solution move relative to each other in a continuous dynamic process. Multiple columns are interconnected with valve systems that periodically switch flow directions, creating a moving mass transfer zone that continuously engages fresh resin with feed solution, thereby maximizing resin utilization efficiency while maintaining separation quality
Solution Approach 2:
The patent divides the chromatographic system into multiple discrete columns (typically 4-6 columns) instead of a single long column. Each column contains a portion of the total resin inventory and performs a specific separation task. This segmentation allows the system to cycle through different operational modes (loading, eluting, regenerating) simultaneously in different columns, ensuring continuous separation while optimizing resin usage across the entire system
2Productivity
If displacement zone is introduced to push feed solution through resin bed, then separation proceeds, but eluent water consumption increases excessively
Solution Approach 1:
The simulated moving bed system eliminates the traditional displacement zone by implementing continuous counter-current flow where eluent water is introduced at the point where fructose concentration is highest and immediately begins productive separation. The system maintains continuous useful action by ensuring that at any moment, all resin beads are either in contact with feed solution or eluent water, with no idle displacement zones wasting eluent on non-separating flow paths
Solution Approach 2:
The system pre-positiones eluent water introduction points and feed solution injection points to optimize mass transfer efficiency before actual separation begins. The valve switching sequence is predetermined to ensure that resin beds are properly conditioned and positioned for maximum separation efficiency, eliminating the need for excessive displacement water to initiate and maintain the separation process
3Measurement precision
If long cycle time is used to achieve complete separation, then separation quality improves, but resin and eluent consumption increase
Solution Approach 1:
The patent employs periodic valve switching that cycles through different operational modes in each column (loading phase, eluting phase, regenerating phase). This periodic action creates a rhythmic pattern of mass transfer that continuously refreshes the resin's separation capacity. The cycle time is optimized so that each phase completes sufficient mass transfer for high purity separation while the overall cycle remains short because multiple columns operate in parallel at different stages of the cycle
Solution Approach 2:
The system dynamically adjusts flow rates, valve switching timing, and resin bed positions to optimize separation speed and purity. The simulated moving bed creates dynamic concentration gradients that accelerate mass transfer kinetics compared to static chromatographic systems, achieving high purity separation in shorter cycle times by continuously renewing the driving force for separation
4Measurement precision
If chromatographic column geometry is used with axial dispersion effects, then separation is achieved, but manufacturing complexity and maintenance difficulty increase
Solution Approach 1:
The patent replaces single long chromatographic columns with multiple shorter columns of simpler geometry. Each column is easier to manufacture, pack with resin, and maintain. The segmentation into modular units allows independent replacement or regeneration of individual columns without shutting down the entire system, reducing maintenance complexity while maintaining separation quality through the collective action of all columns in the simulated moving bed configuration
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 100% yield of pure glucose and fructose, significantly reducing resin inventory and eluent water consumption, while enhancing product and by-product dry solid concentration and separation efficiency.
Implementation Method 1
a continuous ion exchange process utilizing a strongly acidic cation exchanger resin, which employs a new mass transfer method that eliminates the displacement zone by retaining the resin in a semi-dry status
Data Source
AI summary
An apparatus disclosed herein is for implementing new mass transfer method to eliminate displacement zone via maintaining installed resin in column in semi-dry status for superior mass transfer between two phases. Through implementing following methods comprising new mass transfer method, differential set-up and via single stage recycle procedures integrating with modules, apparatus herein disclosed is operated in a contained loop comprising multiple modules connected in sequence and yet function independently to simultaneously feeding raw solution containing glucose and fructose, inputting eluent water, retrieving raffinate glucose and product fructose, and other recycling mixtures to enhance concentration of separated fractions and capable of continuous separation of glucose and fructose feed solution into 100% yield of respective pure component. Disclosed apparatus cutbacks nearly 40% of resin stock compared under same feed throughput with traditional simultaneous moving bed process that has separation of 88% recovery of 90% fructose purity in product stream.