There are three basic extraction methods to create CBD oil and associated products. CO2 extraction. The supercritical (or subcritical) CO2 method uses carbon dioxide under high pressure and extremely low temperatures to isolate, preserve, and maintain the purity of the medicinal oil. This process requires expensive equipment and a steep operational learning curve. But, when done well, the end product is safe, potent, and free of chlorophyll (chlorophyll imparts an undesirable taste). Ethanol. High-grade grain alcohol can be used to create high-quality cannabis oil appropriate for vape pen cartridges and other products. But this extraction method destroys the plant waxes and some other phytochemicals, which may have health benefits that are favored by some product-makers. Olive oil. Olive oil can also be used to extract cannabis oil. Dr. Arno Hazekamp, director of phytochemical research at Bedrocan BV, which supplies medical cannabis for the Dutch Health Ministry, reports this ...