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cbd oil co2 extraction

The dry ice extraction method is another way to extract CBD, and it can be performed at home. Although, it takes a bit more time and effort than its olive oil equivalent. As well as the cannabis plant itself, you’ll need the following equipment:

Pros and Cons of the Solvent Extraction Method

In this article, we will look at the best ways to extract CBD from the cannabis plant. But first, let’s find out what the substance is and why it is so coveted.

2 – The Olive Oil Extraction Method

CO2 typically behaves like a gas at standard pressure and temperature. And it is easily changed to a solid while in this state. The solid version of the gas is known as dry ice. Using the aforementioned equipment in a lab, you can turn CO2 gas into a liquid by ensuring the temperature drops below -69 degrees Fahrenheit while increasing the pressure to over 75 pounds per square inch (psi). At this stage, you have your starting point for CO2 cannabis extraction. Next, you will follow one of the three steps described below.

Is it a safe extraction method…

This form of extraction involves low temperatures and low pressure. Subcritical extractions take longer than their supercritical counterparts and also produce a smaller yield. While it retains the terpenes, essential oils, and other sensitive materials, it doesn’t extract larger molecules such as chlorophyll and omega 3 and 6. The benefit of subcritical extraction, however, is that it is less likely to damage terpenes.

The way CBD affects our body is quite different from THC in the sense that it is not involved in direct stimulation of the CB1 and CB2 receptors. The major impact of CBD is on other receptors such as serotonin, adenosine, and vanilloid.

STEP TWO: Remove the alcohol. This is done by gently warming the oil extract using a rotary evaporating machine. Alcohol’s boiling point is different from the oil’s, so it simply evaporates out of the oil. The alcohol is recovered and can be reused in the future.

As described above, the conversion of THCa to THC requires heat. This is a chemical process called decarboxylation. The best way to get the highest yield through CO2 cannabis extraction is to decarboxylate it first. Typically, processors use ovens for this task. Once decarboxylated and dried, the material is ground up into a coffee-ground consistency. Watch a video of this process here:

The Entourage Effect

Other extraction solvents, such as hydrocarbon-based propellants like propane and butane, hexane and pentane, or ethanol/alcohol mixtures, require additional distillation or purging beyond the supercritical CO2 extraction process to separate the solvent from the extracted oil. Carbon dioxide has a very low boiling temperature and wants to be a gas at room temperature, so it naturally separates from the extracted oil, without additional distillation or purging.

To learn more about cold separation, watch this short video:

STEP ONE: The extract containing fats and waxes (a sludgy crude oil that looks like runny peanut butter) is mixed with 200-proof alcohol, and put in an industrial freezer overnight. The next day, the mixture is filtered through a funnel, trapping the undesirable elements onto filter paper. The mixture can be run through the filter several times as needed.

While this CBD extraction process is much simpler, there are some downfalls. It is more prone to error, much less efficient, and may potentially damage part of the essential oil profile of the plant. Due to these reasons, steam distillation is very rarely used to extract CBD nowadays, but many labs still use some type of distillation in the process of isolating CBD from full-spectrum oil.

When supercritical CO2 is used in CBD extraction, its gas properties allow it to effuse through all plant matter, while its liquid properties allow it to extract compounds efficiently. The exact process varies, and some labs start the extraction with liquid CO2 while others start with CO2 in gas form. In both cases, manufacturers add CO2 in a chamber that includes plant material and use the exact amounts of pressure and temperature needed for CO2 to reach its supercritical state. At this point, and with the help of some additional heat, CO2 acts as a solvent and causes the plant material to separate, carrying with it all the essential compounds. Once done, CO2 is separated from the organic compounds, and manufacturers are left with full-spectrum CBD oil.

Solvent extraction

While not as essential as carboxylation, winterization is a very common process that ensures that the final product of the extraction is as pure as possible. Simply put, the process of winterization employs solvents (usually ethanol) and low temperatures to ensure that lipids and other impurities are removed from an oil extract. This takes place as one of the final steps before full spectrum oil is obtained.

If you are interested in the ins and outs of CBD extraction from cannabis strains high in CBD, here’s a breakdown of the most commonly used CBD methods.

CBDfx offers some of the finest organic full spectrum CBD oil. They’re blended with MCT oil derived from coconuts and are now available in a few exciting flavor varieties. They start at 500 mg and go up to 1,500 mg CBD. CBDfx employs a special supercritical CO2 extraction process using only the finest organic hemp.