Grape Seed Extract Fractionation via Resin Chromatography
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Solution Overview
Problem
Existing processes for extracting active components from grape seeds often require toxic solvents and complex procedures, limiting flexibility in adjusting the content of catechins and epicatechins in the final products.
Innovation Solution
A process that uses water and ethanol as solvents, without pH control, to extract and fractionate grape seed extracts, allowing for the separation of fractions with varying molecular weights of catechin and epicatechin derivatives, and subsequent chromatographic purification to achieve desired monomer and oligomer contents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional extraction processes are used, then extraction efficiency is improved, but toxic solvents and complex procedures are required
Solution Approach 1:
The patent changes the chemical parameters of the extraction system by replacing toxic organic solvents with water and food-grade alcohols (ethanol, isopropanol). This parameter change maintains extraction efficiency while eliminating harmful factors, as the patent demonstrates effective extraction of catechins and procyanidins using these safer solvents.
Solution Approach 2:
The patent employs readily available, inexpensive solvents (water, ethanol, isopropanol) that can be easily disposed of or evaporated without special handling requirements. These solvents replace expensive and hazardous chemical solvents, making the process both safer and more economically viable.
2Productivity
If conventional extraction processes are used, then extraction efficiency is improved, but procedure complexity increases
Solution Approach 1:
The patent extracts and removes the complex pH control step from the conventional extraction procedure. By eliminating the need for acid or base addition and pH monitoring, the process becomes significantly simpler while maintaining extraction efficiency, as demonstrated by the direct extraction of grape seeds in water or alcohol without pH adjustment.
Solution Approach 2:
The patent segments the extraction process into simple, discrete steps: (1) direct extraction with water/alcohol, (2) filtration, (3) concentration, and (4) optional fractionation. This segmentation eliminates the need for continuous pH monitoring and adjustment, reducing procedural complexity while preserving extraction effectiveness.
3Adaptability or versatility
If fractionation is performed to adjust monomer content, then product flexibility is improved, but process complexity increases
Solution Approach 1:
The patent applies partial fractionation only when needed to achieve specific monomer content ranges. The extraction process itself produces a broad spectrum of polyphenols, and fractionation is used selectively to adjust the final product composition. This partial action approach provides product flexibility without requiring complete fractionation of all batches, thus avoiding excessive process complexity.
Solution Approach 2:
The patent creates a dynamic, flexible process where the extent of fractionation can be adjusted based on desired product specifications. The same extraction system can produce different product profiles (high monomer, balanced, or oligomer-rich) by varying the fractionation conditions, providing adaptability without requiring multiple fixed extraction systems.
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 process enables the production of extracts with adjustable contents of monomers and oligomers, reducing high molecular weight tannins and secondary metabolites, resulting in products suitable for cosmetics, food supplements, and nutraceuticals with enhanced antioxidant action.
Implementation Method 1
Separation of the products with different MW, through chromatographic purification on a column
Implementation Method 2
chromatographic purification on a resin
Implementation Method 3
subsequent treatment with polyvinylpolypyrrolidone (PVPP)
Implementation Method 4
Extraction of grape seeds with a solvent (total extract)
Data Source
AI summary
A process for the extraction of Vitis vinifera seeds which comprises: a) extraction of grape seeds with a solvent (total extract); b) removal of water-insoluble tannins; c) optional removal of water-soluble tannins; d separation of the products with different MW, through chromatographic purification on a column.