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how to extract cbd oil from cannabis

— Do the test results include more than just CBD and other cannabinoid content?

I am often asked about which brands of CBD are the best and which products to choose. But the truth is that when it comes to CBD, brands do not matter. Farms and plants matter. Selecting quality CBD-rich cannabis plant products begins with the farm they are grown on. Before you purchase any CBD product, know the farm and farmer. This is an easy task in most of our state-legal cannabis dispensaries, as this information will be readily available and even used as a marketing tool. This information is harder to find if you are purchasing CBD products from the over-the-counter herbal supplement market.

Excerpted with permission from CBD Every Day: How to Make Cannabis-Infused Massage Oils, Bath Bombs, Salves, Herbal Remedies, and Edibles by Sandra Hinchliffe. Copyright 2019 by Skyhorse Publishing, Inc.

By Sandra Hinchliffe

I’ve developed a checklist that you can use and that I hope will guide you to the products that are worthy of your consideration:

THC per 1ml dose. How low was that temperature? 175°F (80°C)—a temperature much lower than what is typically expected for a complete decarboxylation. What made the difference? The slow processing of this oil over a 24-hour period. Decarboxylation takes place with temperature, time, or in this case, both time and temperature.

When one considers flavors, textures, freshness, effects, and fragrances as the starting point of evaluating a quality CBD oil product, this recipe will produce a gourmet oil extraction that will impress even the most experienced connoisseur.

The functionality of this book is to show you how to seek, find, and enjoy CBD-rich cannabis. Facts and aesthetics both matter if what you seek is a quality product and a satisfying experience.

Solvent extraction is a rudimentary and risky practice, but it has fans. Essentially, it involves running a liquid solvent through decarboxylated hemp to remove cannabinoids and terpenes. The usual solvents include butane, ethanol, and hexane, so you need to safely evaporate any residual solvent post-extraction to ensure usable CBD extract.

Below, you will find a breakdown of some of the most common extraction techniques used, including their main pros and cons.

Keep reading to find out how to extract CBD, and which method produces the highest-quality CBD oil. While they all harness the power of CBD, they don’t all achieve the same degree of purity.

Basic solvent CBD extraction

• Can be performed easily at home
• Relatively safe, with no previous extraction experience needed
• Greater degree of purity compared to solventless extraction

CO₂ extraction has significant advantages over other methods of producing CBD oil. First, you can pump supercritical CO₂ through hemp in such a way that it selectively picks up the cannabinoids and other compounds, leaving everything else behind.

In this method, CO₂ is manipulated to enter a supercritical state. With characteristics of both a gas and a liquid, it’s pumped through raw plant material under controlled conditions, stripping away essential terpenes and cannabinoids without damaging them.

• Yields are low and impractical
• No way of controlling purity, with minimal levels of CBD
• CBD extract contains plant material and unwanted cannabinoids

Solvent extraction method: The solvent extraction process is similar to using CO2, but it’s notably cheaper and faster. Butane has long been used in cannabis extraction but ethanol and propane are also popular. This method also uses a closed-loop system wherein the liquid butane, propane, or ethanol washes over the cannabis, releasing the CBD, other cannabinoids, and terpenes. The solvent then has to be carefully heated or cooled to separate the solvent from the extracted compounds without damaging them. The main drawback of solvent extraction is that some solvents may extract impurities from the cannabis plant material, which could give the end-product an unpleasant taste.

CBD may go through further refinement after winterization to create the purest possible CBD product. The additional refinement phase is known as short-path distillation. The process is similar to winterization, but it involves using reduced pressure to allow lower-than-normal boiling temperatures. The solution is heated just enough for the impurities to boil off and travel a short path out of the system, leaving pure CBD oil to distill into the collection chamber.

How long does CBD extraction take?

Both of these extraction methods use highly combustible chemicals and can be dangerous. Only trained professionals in properly equipped labs should attempt any kind of chemical extraction.

Leising agrees that the CO2 method is superior. As he shared, “CO2 is generally preferred for the extraction of cannabinoids that are meant for ingestion or further refinement. Due to the nature of the extraction process, you can be assured that your extracted oil will be free of any residual solvents, microbes, and fungi.”

After CBD oil is extracted from hemp or cannabis, the process of winterization begins. This process removes the impurities and unwanted elements that made it through the extraction process, such as fats, lipids, and waxes. In essence, winterization transforms crude oil into purified oil. The process gets its name from a step which involves mixing the extracted oil with ethanol and freezing the solution. The impurities and undesirable compounds solidify and fall out of the solution, which is then passed through a filter, separating wax, lipids, and fats from the oil. The final step involves removing the ethanol from the solution.