Steam distillation: In Steam Distillation, water boils to generate steam through the plant material. This steam allows the oil to get separated from the plant. Supercritical CO2 extraction: CO2 reaches a gaseous and liquid state at high and low temperatures. A supercritical state comes when the temperature goes below 69 degrees Fahrenheit. Oil extraction: Plant material is processed to blend into alcohol, oil or water. By that time, cannabinoids get dissolved into a carrier liquid. Solvent extraction: During extracting CBD from hemp, solvents like hydrocarbons and alcohols, including ethanol, hexane, butane, and propane, are considered safe components GRAS. Other methods of extracting CBD from Hemp are Dry Ice Extraction, Hydrocarbon Extraction, and Vegetable Oil Extraction.