Grape Extract Refinement for High ORAC Polyphenol Concentration
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Solution Overview
Problem
Current dietary supplements and foods fail to provide adequate antioxidant protection, as they typically do not meet the recommended daily intake of 3,000 to 5,000 ORAC units, with no single supplement or food offering ORAC values in the range of 10,000 to 30,000 μmol TE/g, and existing methods for producing high ORAC value extracts are not efficient in separating active from inactive ingredients.
Innovation Solution
A process involving the extraction and refinement of grape extracts using ethanol as a solvent, followed by centrifugation, macroporous absorbent resin treatment, and ion exchange and silicon isolation resins to concentrate polyphenols and monomeric phenols, resulting in a high ORAC value grape extract that can be tailored to achieve ORAC values between 10,000 to 30,000 μmol TE/g.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional extraction methods are used to produce dietary supplements, then the production process is simple, but the ORAC value and antioxidant capacity are insufficient (typically below 3,000 to 5,000 ORAC units)
Solution Approach 1:
The production process is divided into multiple sequential stages: initial extraction with ethanol, centrifugation to separate solids, macroporous resin treatment for preliminary purification, and final ion exchange resin treatment. Each stage targets specific components to progressively concentrate polyphenols while removing different types of impurities, achieving high ORAC values through cumulative purification effects
Solution Approach 2:
Two types of resin intermediaries are employed: macroporous absorbent resin as a mediator to adsorb and concentrate polyphenols from the extract, and ion exchange resin as a mediator to further purify by removing unwanted ions and compounds. These intermediaries facilitate the separation and concentration processes without requiring direct manipulation of the extract components
2Reliability
If multiple purification steps are implemented to achieve high ORAC values, then the antioxidant capacity increases (10,000 to 30,000 μmol TE/g), but the production complexity increases
Solution Approach 1:
The process utilizes parameter changes in the form of sequential solvent treatments with varying ethanol concentrations. The initial extraction uses high concentration ethanol to dissolve polyphenols, followed by purification steps that progressively remove impurities. The ion exchange resin treatment adjusts ionic parameters to selectively bind and remove unwanted compounds while preserving polyphenols, achieving high ORAC values through controlled parameter modifications
3Reliability
If conventional extraction methods are used, then the production cost is low, but the product does not meet recommended daily antioxidant intake
Solution Approach 1:
Macroporous absorbent resin with controlled pore structures is used to selectively adsorb polyphenols from the grape extract. The porous structure provides high surface area for adsorption, concentrating polyphenols effectively. Subsequently, ion exchange resin with specific ionic properties further purifies the extract by removing unwanted ions and compounds, achieving the high polyphenol concentration (10,000 to 30,000 μmol TE/g) necessary to meet recommended daily antioxidant intake
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 effectively produces a grape extract with exceptionally high ORAC values, ensuring enhanced antioxidant capacity, solubility, and a mild flavor, allowing for the recommended daily intake of antioxidants to be achieved through dietary supplements or foods, surpassing the ORAC values of existing products.
Implementation Method 1
extracting and refining of grape extracts using ethanol as a solvent
Implementation Method 2
dissolving and extracting of the dried grape raw material to yield a crude grape extract solution
Implementation Method 3
The solvent is removed and the crude grape extract solution is at least partially separated from inactive residues, for example, using a centrifuge
Implementation Method 4
the crude grape extract solution is run through a macroporous absorbent resin so that desired active ingredients are absorbed
Implementation Method 5
refinement, preferably in a refining tower that includes an ion exchange resin and a silicon isolation resin
Implementation Method 6
different active compounds are absorbed into different regions of the silicon isolation resin, and become isolated due to their different running speeds
Implementation Method 7
The desired high ORAC extract solution is then spray dried, tested, and packaged
Data Source
AI summary
Grape material is processed to yield a grape extract high in concentrated polyphenols, with ORAC values exceeding at least about 10,000 μmol TE/g. The grape material is dried, and soaked in ethanol to commence desired concentrate extraction. Following ethanol removal, inactive residue is at least partially separated from the desired concentrate solution, which passes through a macroporous absorption resin that absorbs desired active ingredients. Ethanol resin washing yields an intermediate extraction solution. After ethanol removal, the intermediate extract solution with the mixed active ingredients is refined. During refinement, high concentration of polyphenols and monomeric phenols are separated, and collected. These collected materials yield a desired high ORAC extract solution. Further drying yields the desired material, which is tested and packaged. This material exhibits good water solubility, mild flavor, and can be added to foodstuffs and nutritional supplements as a beneficial antioxidant.