Supercritical CO2 systems for hydrophobic fluid extraction and food processing
Environmentally benign supercritical CO2 (scCO2) technology for extracting oils and lipids during food processing while simultaneously removing metal-based contaminants. Tunable temperature, pressure, and additive parameters enable control over extraction efficiency and end-product morphology, offering a cleaner alternative to conventional extraction methods.
Overview
This solution leverages supercritical carbon dioxide (scCO2) as an environmentally benign extraction medium for hydrophobic fluids, including oils and lipids used in food processing. By tuning temperature, pressure, and co-solvent additives such as ethanol and water, the technology enables precise control over extraction efficiency while simultaneously removing trace metal contaminants (e.g., iron, magnesium, nickel, chromium) from food products. The approach also allows operators to influence the porosity, texture, and morphology of the end product, making it a versatile platform for clean-label and high-purity food manufacturing.
Technical specifications
- Extraction medium: Supercritical CO2, which transitions between gas- and liquid-like properties above its critical point, enabling tunable solvation of hydrophobic compounds
- Parameter ranges: Temperature from 25 to 200 °C and CO2 partial pressure from 70 to 200 atm allow optimization for diverse feedstocks
- Additives: Ethanol and water co-solvents enhance extraction of heavier and more polar lipid fractions
- Contaminant removal: Demonstrated capability to extract metal-based contaminants from complex heterogeneous substrates during the same process
- Morphological control: CO2 interaction with porous environments alters material organization, enabling tuning of texture and porosity in the final product
- Process basis: CO2 displaces both light aliphatic and heavier aromatic hydrocarbon molecules from porous matrices, accelerating extraction rates
- Sustainability profile: Designed to reduce toxicological impacts relative to conventional solvent-based extraction methods
Technology readiness level
The technology is at an early-to-mid stage of development. Prior laboratory work has validated the ability of scCO2 to reorganize and transport hydrocarbons in porous environments and to extract metals from heterogeneous substrates. Planned next steps include systematic investigation of temperature, pressure, and additive effects on extraction of representative food-grade oils and lipids, prototype development based on optimized physico-chemical parameters, and techno-economic and life cycle analyses to assess commercial viability and environmental benefits.
About Cornell University
Cornell University is a comprehensive private, land-grant research university with campuses in Ithaca and New York City, combining significant scale with cross-disciplinary breadth. Industry connects through open-access user facilities and prototyping labs, pilot-scale testbeds, and a research and technology park that provide pathways from discovery to demonstration. A statewide extension network and integration with a major hospital system enable real-world deployment, while a graduate campus embedded in New York City’s tech corridor provides direct access to startups, venture investors, and corporate R&D teams. Research is supported by competitive federal funding from agencies such as the National Science Foundation, National Institutes of Health, the Department of Energy, and the U.S. Department of Agriculture. A dedicated technology transfer office streamlines IP management, licensing, startup formation, and corporate partnerships across campuses.
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