High-Pressure CO2 Extraction of Polar Plant Compounds
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Solution Overview
Problem
Current methods for extracting natural products, such as solvent extraction and emerging technologies like microwave and supercritical fluids, face issues like degradation, high energy consumption, equipment costs, and safety concerns, particularly when extracting polar or medium-polarity compounds.
Innovation Solution
A method using high-pressure carbon dioxide (HPCD) to extract plant-derived natural products with polarity or medium polarity, involving shattering plant materials, adding water, and treating them under 5-50 MPa pressure with circular CO2 feeding, which enhances mass transfer and avoids degradation, while being environmentally friendly and cost-effective.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water extraction is used, then safety is improved, but extraction time increases and production efficiency decreases
Solution Approach 1:
The patent applies parameter changes by utilizing high pressure (5-50 MPa) to alter the extraction conditions. This pressure parameter change enables water extraction to achieve both safety and improved productivity, as the high pressure accelerates mass transfer and extraction kinetics without compromising the safety benefits of using water as solvent.
2Productivity
If organic solvent extraction is used, then extraction efficiency is improved, but food safety is compromised due to solvent residue
Solution Approach 1:
The patent replaces persistent organic solvents with water, which is safe and environmentally friendly. The high pressure condition acts as a temporary enhancement that achieves efficient extraction with water, eliminating the need for harmful organic solvents while maintaining extraction effectiveness.
3Productivity
If supercritical fluid technology is used, then extraction efficiency is improved, but equipment cost increases due to high pressure requirements
Solution Approach 1:
The patent utilizes parameter changes by operating in the high pressure liquid phase (5-50 MPa) rather than requiring supercritical conditions. This parameter adjustment maintains the benefits of pressure-enhanced extraction while avoiding the need for expensive supercritical equipment, as the system operates below the critical point of water.
4Productivity
If ultra-high pressure technology is used, then extraction efficiency is improved, but equipment requirements increase with minimum processing stress of 100 MPa
Solution Approach 1:
The patent applies parameter changes by optimizing the pressure range to 5-50 MPa, which is lower than ultra-high pressure technology (100 MPa). This parameter adjustment achieves effective extraction while significantly reducing equipment complexity and cost requirements, making the technology more accessible for industrial application.
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 method increases yield and reduces extraction time, ensures product safety and shelf life, and lowers equipment requirements, making it suitable for large-scale industrial production while being environmentally friendly and cost-effective.
Implementation Method 1
high-pressure carbon dioxide exists in a dynamic mode and leads to several effects such as vortex, shear and mixing, which can improve the diffusion rate of the mass transfer
Implementation Method 2
high-pressure carbon dioxide exists in a dynamic mode and leads to several effects such as vortex, shear and mixing
Implementation Method 3
when the pressure relief is conducted after extraction, the 'explosion' effect of high-pressure carbon dioxide can further enhance damage to the cell structure of the extracted matrix
Implementation Method 4
high pressure carbon dioxide has bactericidal and enzyme-inactivating effect, which can inactivate and damage endogenous enzymes of natural products and kill microorganisms
Implementation Method 5
high pressure carbon dioxide has bactericidal and enzyme-inactivating effect, which can inactivate and damage endogenous enzymes of natural products
Data Source
AI summary
The invention discloses a method for extracting plant-derived natural products with polarity or medium polarity, it comprises shattering the plant-derived materials containing plant-derived natural products with polarity or medium polarity, followed by adding water, raising the pressure to 5-50 MPa at the temperature of 40-90°C and circularly feeding high-pressure carbon dioxide to conduct treatment for 1-60 min. The method according to the present invention can be used not only for the extraction of polarity natural products such as anthocyanins, but also for the extraction of other natural products with polarity or medium polarity.