1.Technical Principles
Subcritical extraction technology uses subcritical fluids (such as butane, propane, dimethyl ether, tetrafluoroethane, etc.) as extractants in closed, oxygen-free, low-pressure pressure vessels, according to the principle of similar organic matter dissolution, through the molecular diffusion process of extraction materials and extractants in the immersion process, to realize the transfer of fat soluble components in solid materials to liquid extractants. Then the extraction agent is separated from the target product by the process of vacuum evaporation, and the target product is obtained.
2.The application in functional oil extraction
High quality extraction: Subcritical extraction techniques enable high extraction rates in a short period of time because functional oils often contain specific active ingredients that require quality and accurate extraction.
Selective extraction: Subcritical extraction technology can select suitable solvents and extraction conditions according to different components, so as to achieve the extraction of target functional components. This helps retain the active ingredients in the grease while removing unwanted impurities.
Protection of heat-sensitive ingredients: The active ingredients in many functional oils are sensitive to heat, and traditional thermal processing methods may result in the loss or destruction of these ingredients. The subcritical extraction technology, which is carried out at a lower temperature, can effectively protect these heat-sensitive components, thereby improving the quality and nutritional value of functional oils.
Environmental protection and sustainability: Subcritical extraction technologies use extractants that are easy to recycle and reuse, reducing environmental pollution. At the same time, the technology also helps to improve the utilization of raw materials, reduce waste generation, in line with the concept of green and low-carbon development.