Views: 0 Author: Site Editor Publish Time: 2024-04-25 Origin: Site
High purity and preservation of biological activity
Supercritical CO₂ has good selectivity and can precisely extract target components such as cannabidiol (CBD) from industrial hemp, reducing the extraction of impurities. This helps to obtain high - purity extracts.
Since the extraction process is carried out under relatively mild temperature and pressure conditions (usually the temperature is between 31 - 80 °C and the pressure is between 7.38 - 60 MPa), the bioactive components of the extract can be maximally preserved, ensuring its medicinal value.
No solvent residue
CO₂ is a gas at normal temperature and pressure. After extraction, by simply reducing the pressure and temperature, CO₂ can quickly volatilize and will not remain in the extract. This ensures the safety of the final product and avoids the problem of solvent residue caused by traditional organic solvent (such as ethanol, petroleum ether, etc.) extraction.
Green and environmentally friendly
CO₂ itself is non - toxic, odorless, non - flammable, chemically stable, and relatively inexpensive. Compared with using organic solvents, supercritical CO₂ extraction does not cause environmental pollution due to the volatilization of organic solvents and is environmentally friendly.
From the perspective of the entire production cycle, CO₂ can be recycled, reducing resource waste and waste emissions, which is in line with the concept of sustainable development.
Mild operating conditions
Supercritical CO₂ extraction is usually carried out at relatively low temperatures, avoiding the destruction of heat - sensitive components by high temperatures. For example, for some active components of hemp that are prone to decomposition or denaturation at high temperatures, supercritical CO₂ extraction can effectively extract them while ensuring the stability of the components.
Strong adjustability
By precisely controlling parameters such as temperature, pressure, and CO₂ flow rate, the extraction process can be flexibly adjusted to achieve selective extraction of different components. This adjustability enables targeted extraction of specific components such as CBD and cannabigerol (CBG) according to market demand and product requirements in industrial hemp extraction.
High degree of automation
Supercritical CO₂ extraction equipment is usually equipped with advanced automatic control systems, which can precisely control various parameters in the extraction process, ensuring the stability and reproducibility of the extraction process, improving production efficiency, and reducing labor costs and operational errors.