Raw Sugar Fructose Preparation for High-Purity Allulose Crystallization
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Solution Overview
Problem
Existing methods for producing allulose face challenges such as high production costs, low yield, and the presence of impurities like saccharides with DP3 or higher, which complicate the separation and purification processes, leading to difficulties in achieving high purity and crystallinity.
Innovation Solution
A method that utilizes raw sugar as a substrate to produce high-purity fructose directly, eliminating the need for separate sugar production processes, and employs a fructose separation process involving invertase treatment, activated carbon treatment, ion purification, and simulated moving bed chromatography to minimize impurities and enhance allulose yield and purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods using starch or corn syrup are used to produce allulose, then the production process can proceed, but the production cost increases and the purity decreases due to the presence of oligosaccharides with DP3 or higher
Solution Approach 1:
The patent extracts and removes oligosaccharides with DP3 or higher from the reaction mixture through filtration and centrifugation steps, eliminating the harmful impurities that reduce allulose purity while maintaining a relatively simple production process
Solution Approach 2:
The patent performs preliminary hydrolysis of sucrose into glucose and fructose before the allulose production reaction, and pre-filters the reaction mixture to remove oligosaccharides before crystallization, thereby preventing impurity interference with crystallization and improving final product purity
2Manufacturing precision
If multiple processes including sugar production and isomerization are used, then allulose can be produced, but the production cost increases
Solution Approach 1:
The patent combines the sugar production step and allulose production step into a single integrated process by directly using sucrose hydrolysis reaction mixture as the substrate for allulose production, eliminating the need for separate sugar purification and isomerization processes, thereby reducing production costs and improving efficiency
Solution Approach 2:
The patent uses sucrose as a dual-purpose raw material that serves both as the carbon source for allulose production and as the substrate for generating the fructose-glucose mixture needed for the reaction, eliminating the need for separate sugar production facilities
3Ease of operation
If isomerized sugar syrup from corn is used, then the production process can proceed, but oligosaccharides with DP3 or higher are present which affect separation ability
Solution Approach 1:
The patent removes oligosaccharides with DP3 or higher from the reaction mixture through filtration and centrifugation steps, eliminating the harmful impurities that reduce allulose purity while maintaining a relatively simple production process
Solution Approach 2:
The patent performs preliminary filtration of the reaction mixture to remove oligosaccharides before the allulose crystallization step, thereby preventing impurity interference with crystallization and improving final product purity
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 simplifies the production process, reduces costs, and improves allulose purity and crystallinity by controlling impurities, enabling high-yield production of allulose with minimal impurities, particularly hydroxymethylfurfural (HMF).
Implementation Method 1
A method involving the direct production of high-purity fructose from raw sugar using invertase treatment
Implementation Method 2
hydrolyzing sugar
Implementation Method 3
purification and concentration steps are required
Implementation Method 4
allulose has a demand for a crystalline powder, but allulose has low crystallinity which makes it difficult to crystallize
Data Source
AI summary
The present disclosure relates to an improved method for producing allulose and, more particularly, to a method for preparing a fructose-containing raw material solution by using raw sugar as a raw substrate used in the production process.