With so much rising interest in CBD, researchers have examined a number of different methods of extracting it from the hemp plant. Each method has distinct advantages and disadvantages, and C02 extraction is considered to be among the best methods due to its safety, and the purity of the end product.
Widely considered to be the safest and best extraction method, this method is performed by using pressurized C02 to pull the cannabinoids, terpenes, and other compounds from the hemp plant. While not considered a traditional solvent, it acts as one in certain temperature and pressure ranges – this allows for a solvent-style extraction, without the harsh chemicals and derivatives that traditional solvent extractions can contain.
Solvent extraction is the process of extracting CBD by using ethanol, butane, propane, isopropyl, or alcohol. This method is fast and relatively easy to perform, but it can be dangerous working with large quantities of volatile solvents. The hemp is placed into a container, then the solvent is run through the hemp, collecting all the cannabinoids. Then, the solvent is evaporated, leaving only the CBD extract behind.
Hemp seed oil, however, is sourced by cold pressing hemp seeds, by using one of two types of press machines: a traditional screw press or a reducing screw design. Essentially, the seeds are placed into a pressing machine and crushed until the oil extrudes.