What is supercritical extraction used for?

What is supercritical fluid extraction used for?

The application of supercritical fluid extraction technology mainly includes:

• Extraction of high value-added useful components (natural pigments, flavors and fragrances, edible or medicinal ingredients, etc.) or removal of harmful components from natural products;
• Extraction and deashing of coal liquefied oil;
• Hydrocarbons Selective extraction of linear alkanes or aromatic hydrocarbons;
• Regeneration of catalysts (such as activated carbon);
• Separation of monomers or residual solvents from polymers, separation of azeotropes;
• Seawater desalination;
• Separation of isomers; Environmental pollution control ( Such as extraction of metal ions or organic matter from wastewater solutions, removal of soil pollutants, nuclear waste treatment and many more. )

Does CO2 extraction remove pesticides?

In the process of CO2 extraction of plant raw materials, pesticides, nitrates and heavy metals contained in them can be extracted well, so the application of CO2 has achieved better value.

What is supercritical fluid in food industry?

Supercritical CO2 Extraction of Hop Extract

The use of supercritical CO2 extraction of hop extract not only greatly improves the utilization of effective ingredients, but also brewed beer has better foam and flavor.

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Used for dietary supplement edible oil

The application of supercritical CO2 fluid extraction to vegetable oils is relatively extensive and mature.

People have done a lot of research on soybeans, peanuts, sunflower seeds, palm seeds, rice bran, wheat germ, corn germ and other varieties. The content is low, the color is light, and the refining process such as vacuum distillation and deodorization can be omitted.

Compared with traditional methods, the residue after oil extraction still retains its original shape, which can be conveniently used to extract protein, blend into food or use as feed.

Therefore, supercritical CO2 fluid extraction technology is widely used in the development of health oils (Dietary supplement edible oil) with high added value, such as rice bran oil, wheat germ oil, sea buckthorn oil, etc., and has achieved industrial application results.

Supercritical CO2 Extraction of Natural Food Coloring

Compared with the traditional organic reagent method, the supercritical CO2 fluid extraction technology has no solvent residues and no pollution. It can avoid the thermal degradation of the extract at high temperature, protect the activity of physiologically active substances, and can maintain Examples include the natural flavor of the extract.

Therefore, the supercritical CO2 fluid extraction technology has been applied to the extraction and purification of natural food colorings such as capsicum red pigment, lycopene, β-carotene and gardenia yellow.

Supercritical CO2 Extraction of Natural Fragrances

In the traditional extraction method of natural flavor, it is still an inevitable processing method that the flavor components are subjected to heat treatment.

Such as water vapor distillation and solvent extraction heating may cause some heat-sensitive or chemically unstable components in natural spices to be destroyed, thus changing the unique aroma and flavor of natural spices.

The supercritical CO2 fluid extraction method can carry out the entire separation process at room temperature, and the CO2 is non-toxic and has no residual phenomenon, so it is particularly suitable for the separation and purification of unstable natural products and physiologically active substances, which is suitable for production closer to natural fragrance. The trend of spice processing products.

Supercritical CO2 Extraction of Herbal Medicine

Supercritical CO2 fluid extraction is an ideal separation method in natural medicine extraction.

Almost all the effective ingredients of natural medicines can be retained, mainly including flavonoids, glycogen compounds, alkaloids, mushrooms, coumarins, cardioceptors, volatile oils and other chemical substances.

Supplementary reading

In recent years, in the process of modernization of traditional Chinese medicine in China, supercritical extraction technology has received more attention and has been listed as the key technology of traditional Chinese medicine modernization.

In addition, analytical supercritical carbon dioxide extraction is used for the pretreatment of biological samples for trace drug test samples, and it has shown attractive application prospects in terms of gradually replacing some traditional methods and developing into a conventional method, showing faster and safer , Economic and environmentally harmless superiority.

For example, the study on the detection and removal of pesticide residues in ginseng with SC-CO2 extraction, the results show that the SFE method has high extraction rate, less solvents and fewer separation steps, which is significantly better than traditional methods.

In addition, in recent years, critical water has been successfully applied in the extraction of organic pollutants in environmental samples, the extraction of active ingredients from natural products, and the pre-analysis process, which is regarded as a green and environmentally friendly and promising revolutionary technology.

Can supercritical CO2 extraction help you run for president of the United States?

This is a serious topic. First of all, you must be an American citizen, and then you must be an adult. If you can meet the above conditions, then you should have the right to run for President of the United States.

What is supercritical fluid extraction

Supercritical fluid extraction (SFE) is the process of separating one component (the extractant) from another (the matrix) using supercritical fluids as the extracting solvent.

Supercritical CO2 extraction (SCFE) is used particularly in the food, beverage, cosmetics and pharmaceutical industry for extracting natural substances, aromas, fats, oils, waxes, polymers, enzymes and colourants in their supercritical physical state.

CO2 is a natural and environmentally-friendly solvent which has advantages over synthetic and harmful media such as n-hexane when it comes to sustainability.

Supercritical CO2 extraction machine