Cannabis / Hemp Degas / Decarb

Degassing removes trace amounts of solvents and volatile compounds from the cannabis oil prior to distillation, or before cannabis oil is sent to market.


Polish and activate crude oil for further refinement


Purification into a highly concentrated and refined cannabinoid oil


CBD isolate is used for herbal supplement and end-product applications

THC Remediation

THC, heavy metal, pesticide, and color remediation


Preparation into tinctures, topicals, vaporizer cartridges, water-solubles, and other consumer focused end-products


Crude oil is extracted directly from plant material


Precipitation of inactive compounds

Filtration & Color Remediation

Removal of unwanted compounds and refinement of cannabis extract

Solvent Recovery

Reclaim solvent to perform further extractions, winterization, or other post-processing techniques

Decarboxylation Solutions

RV-100 Reactionary Vessel

The RV 100, from Precision Extraction, is a multi-use reactionary vessel with a volume of 100 liters.

The RV 100 Reactionary Vessel can be used for crystallization, winterization, decarboxylation, and many other processes.

  • Batch Capacity

    Up to 20 gallons

  • Standard Features

    Pneumatic stirring motor

Degassing & Decarboxylation

To properly prepare crude oil for further refinement (such as distillation), a degassing procedure should be performed. The terms degassing, devolatizing, or even decarboxylation, are often used to describe this procedure. Although these terms are interchangeable to a degree, they actually mean very different things which can make this a confusing subject when you're trying to learn the steps of processing cannabis/hemp crude oil. The goal of this article is to help you understand the difference between these terms and be able to use them to purchase the right equipment for your processing facility.

A note on Degassing:

Decarboxylation and devolatilization can be achieved by using the same equipment and process. This process is often referred to as degassing. In the following paragraphs, we will go into detail about the chemical process of decarboxylation, the physical process of devolatilization, and how both of them are achieved through degassing.


Decarboxylation is a type of chemical reaction that releases carbon dioxide from non-activated acidic compounds. This reaction causes those non-activated compounds to become activated. Activation enhances the desired physical and psychoactive effects of these compounds. Because of this, it is often a vital step in cannabis/hemp processing.

Decarboxylation can be performed on plant material as well as on crude oil. Most often, this is where the term originates. When performing decarboxylation on plant material, heat is applied. The heat causes a chemical reaction and activates those compounds within the plant material.

This should not be confused with decarboxylation as it relates to degassing or devolatilization. Those can only be achieved when using crude oil that has undergone previous processing steps.

One of those steps would be winterization and solvent recovery, which often leaves behind 1 to 10% of the solvent that must be removed. To do this, the crude oil is heated with a variety of equipment, which will be discussed further below.

Heating the crude oil to a high temperature will decarboxylate the compounds within the oil, thereby activating them. But, chances are most of those compounds have already been activated in previous processing steps. For example, if the plant material was activated using heat, the crude oil coming from that plant would also be activated. Removing that 1 to 10% of solvent, using heat, can also be called "devolatilization".


As discussed above, the process of devolatilizing crude oil will also decarboxylate the target compounds in the crude oil. But, most often decarboxylation is not the goal of the “degassing” process. Devolatilization is much more important and must be done before distilling the crude oil.

To achieve a devolatilized crude oil, heat is applied. This heat forces the evaporation of the small amount of solvent and other light volatiles such as terpenes and water, that remain in the crude oil. These volatiles can have a negative effect on both the efficiency of distillation as well as the performance of the equipment used in the process. For this reason, devolatilizing the crude oil (using a degassing procedure) must be performed prior to distillation.

Non devolatilized crude oil takes much longer to distill because those lighter, volatile compounds must be distilled out prior to distilling the targeted higher- boiling-point compounds. These volatiles not only increase the overall time of the cannabis/hemp crude oil distillation, but they can cause performance issues with the equipment in the process.

Most distillation equipment is not designed to handle high amounts of volatiles, these volatiles can shorten the lifespan as well as increase the maintenance intervals of the equipment. Due to the overall efficiency loss, you can see why it is imperative to devolatilize crude oil prior to distillation.