Why CO2 Extraction?
Carbon dioxide (CO2) extraction, which historically has been used to make various food and other products, is becoming increasingly popular for extracting top quality cannabis oil high in cannabidiol (CBD) for many reasons.
- Environmentally friendly extraction practices
- Cheaper, cleaner, and safer products that are free from toxic fossil fuels
- Final product consistency and palatability
- Increased yields
- Increased value of processed materials
CO2 retains solvency power as either a liquid (subcritical) or supercritical fluid. At subcritical parameters it is possible to remove extractants that are thermolabile (readily destroyed or deactivated by heat), resulting in more aromatic extracts. By changing extraction pressure and temperature of supercritical CO2, its solubility and selectivity for a species of interest can be changed to optimize an extraction. CO2 displays exceptional extractant selectability over a wide range of pressure, from 300 psi upwards.
CO2 extraction makes it possible to refuse undesired compounds such as chlorophyll. Extracts obtained from CO2 most closely resemble the natural starting material, which is the goal of essential oil extraction.