Mixed-Bed Ion Exchange Resin for Low-Loss Allulose Purification
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Solution Overview
Problem
Existing methods for purifying allulose-containing solutions using ion exchange resins result in significant allulose loss due to conversion to fructose or other substances, compromising purification efficiency.
Innovation Solution
A method involving a specific combination of ion exchange resins, including a mixed-bed ion exchange resin composed of a strongly acidic cation exchange resin and a weakly basic anion exchange resin with a quaternary ammonium exchange capacity fraction of 0 to 10%, or sequentially passing the solution through separate columns of strongly acidic cation, weakly basic anion, and mixed-bed ion exchange resins, to minimize allulose loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a strongly basic anion exchange resin is used for ion exchange purification of allulose-containing solution, then ion purification efficiency is improved, but allulose loss increases significantly due to conversion to fructose or other substances
Solution Approach 1:
The patent changes the chemical parameters of the ion exchange resin by replacing strongly basic anion exchange resin with weakly basic anion exchange resin having specific properties (quaternary ammonium exchange capacity fraction of 0 to 10%, chlorine content of 0.01 to 5.0 wt%). This parameter change resolves the contradiction by maintaining ion purification capability while reducing allulose conversion to fructose and other substances.
Solution Approach 2:
The patent uses a mixed-bed ion exchange resin comprising both cation exchange resin and anion exchange resin in specific proportions (volume ratio 1:1 to 4:1). This composite material approach allows the system to achieve effective ion purification while the specific composition of weakly basic anion exchange resin minimizes allulose loss through reduced chemical reactivity.
2Manufacturing precision
If ion exchange purification is performed to produce high-purity allulose solution (95-99% D-allulose content), then product purity is improved, but allulose loss occurs due to functional groups of the ion exchange resin converting allulose to fructose or other substances
Solution Approach 1:
The patent modifies the parameters of the anion exchange resin by selecting weakly basic resin with specific quaternary ammonium exchange capacity fraction (0 to 10%) and chlorine content (0.01 to 5.0 wt%). These parameter changes enable the resin to achieve sufficient ion purification for high-purity allulose production while minimizing the conversion of allulose to fructose or other substances through reduced chemical reactivity.
Solution Approach 2:
The patent employs a mixed-bed ion exchange resin system where the weakly basic anion exchange resin serves as a more stable, less reactive material that can be used effectively for purification without causing significant allulose degradation, replacing the previously used strongly basic resin that caused excessive allulose loss.
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 method effectively reduces allulose loss while maintaining acceptable ion purification efficiency, suitable for mass-producing high-quality allulose.
Implementation Method 1
a method for purifying an allulose-containing solution including obtaining an allulose-containing solution ion-purified by passing the allulose-containing solution through an ion exchange resin column filled with a mixed-bed ion exchange resin
Data Source
AI summary
An embodiment of the present disclosure provides a method for purifying an allulose-containing solution including obtaining an allulose-containing solution ion-purified by passing the allulose-containing solution through an ion exchange resin column filled with a mixed-bed ion exchange resin. In the method for purifying the allulose-containing solution according to an embodiment of the present disclosure, the mixed-bed ion exchange resin is a mixture of a strongly acidic cation exchange resin and a weakly basic anion exchange resin, and the weakly basic anion exchange resin constituting the mixed-bed ion exchange resin has an exchange capacity fraction of quaternary ammonium of 0 to 10%. According to the present disclosure, by using the method for purifying the allulose-containing solution, it is possible to not only lower the electrical conductivity of the allulose-containing solution to an acceptable level, but also suppress allulose from being converted to fructose or other substances due to functional groups of the ion exchange resin, thereby minimizing allulose loss. Therefore, the method for purifying the allulose-containing solution according to the present disclosure is suitable for mass-producing high-quality allulose.