To crystallize CBD, you’ll need a jacketed vessel, heating and cooking baths, pentane, and CBD oil. Add two parts of CBD oil to one part of pentane and heat the mixture till it reaches 45 °C (approx 115°F). When you see that the oil is fully dissolved, it’s time for a cooling bath. Its initial temperature should be around 5°C (40 °F). As you stir the solution and gradually lower the temperature, you’ll notice crystal forming — these are crystallized CBD. If the initial CBD oil contains around 70% of CBD, the crystallized substance will feature approximately 90% of CBD. All other components, including THC, will remain in the mother liquor. You can make CBD oil even purer by repeating the whole process a few times.
After this stage, you can obtain CBD-rich oil but it still won’t be pure CBD. To further remove compounds naturally occurring in hemp, you’ll need to distill the extract. The essence of the short-path distillation is in heating the extract until it reaches specific temperatures, which equal to the boiling points of the individual compounds. One by one, you can separate and isolate these compounds. You will eventually obtain CBD isolate, which is pure cannabidiol. This is how to remove THC from CBD oil in large batches.
Remediation via Crystallization
In order to produce broad-spectrum oils (i.e. those that feature other essential hemp components with the exception of THC) manufacturers use chromatography. Chromatography equipment is loaded with hemp extract and solvent. As it runs, it separates the ingredients from each other. The THC faction is then removed. The downside of this process is that it breaks down some CBD molecules as well as other valuable ingredients. Chromatography equipment is also very expensive — sometimes, the price tag can go as high as millions of dollars.
CBD oil promises great benefits for health. However, not everyone is ready to take it due to the possible trace amounts of the psychoactive compound called THC. Because the legally allowed content of THC is extremely low (below 0.3%), hemp-derived CBD won’t get you high. On the other hand, if you’re an athlete or your job requires you to take drug tests, you don’t want to consume any THC at all. The good news is that you can remove THC from CBD oil at home if you have enough time and some equipment.
When CBD is produced on an industrial scale, more often than not, it’s extracted with CO2. Some manufacturers utilize solvents, but they appear to be less popular. With CO2, the extraction process results in a clear substance with no residue. However, it’s not yet pure enough to be ready to use. The step that follows the extraction is called winterization.
If you’re looking for a way to make your own oil, however, this article is here to show you how to extract CBD from a cannabis plant at home.
Place the layered gauze or paper filter over the fireproof bowl and start pouring the solution. It’s not a bad idea to repeat the filtering process several times until you’re satisfied with the achieved purity of the filtered solution.
Extracting CBD oil from a flower
Each of these three types of products provides a separate set of compounds and effects. It’s very important to know what you’re introducing into your system, especially when it comes to potentially psychoactive substances.
Cannabis flowers – make sure you trim down every leaf and leave nothing but the flower for the extraction process. Break larger buds into smaller pieces to make it easier for processing or even better, grind the flower so that the herb could absorb the alcohol better.
Full Spectrum CBD oil contains more than just CBD; there’s a wide array of other cannabinoids, including THC, terpenes, and essential oils. This type of CBD oil allows the use of both leaves and flowers to assure the presence of every compound; however, leaves hold a high concentration of chlorophyll, which gives the oil a dark color and a somewhat bad taste.