Ethanol extraction can produce hemp and cannabis oil with up to 99% purity, meaning a higher quality end product using Ethanol extraction A very comprehensive guide on how to make cannabis oil from trim which includes from processing to producing an oil rich in active compounds.
How to Extract CBD From Hemp and Cannabis Plants
Cannabidiol (CBD) is one of the three main chemicals found in the cannabis plant, and it has grown in popularity in recent years as scientific studies continue to find benefits for its application.
Over the past few years CBD has become so popular that it is now being produced into a wide range of commercial and pharmaceutical products, from edibles, oils, creams and even infused drinks such as coffee.
This naturally occurring compound in the cannabis plant can be used for the treatment of various mental and physical illnesses, and possess beneficial properties such as antioxidants, anti-inflammatories, anticonvulsants and antipsychotics.
Cannabinoids are THC-free, meaning they do not provide you with the ‘high’ of cannabis and that means CBD products are legal in many countries around the world.
CBD, however, is not easy to extract from the hemp plant. The medicinal properties of the plant can easily be damaged in the extraction process, particularly if the wrong equipment is used.
Learning how to extract CBD from a hemp or cannabis plant, and using the most effective machinery to do this, is essential for a high-quality end product.
How can CBD be extracted?
The purpose of CBD extraction is to create cannabinoids in a pure and highly concentrated form that are suitable for human consumption. CBD can be extracted from both hemp and cannabis plants, although it is most oftenly extracted from the stalks and stems of industrial hemp plants.
The two most popular methods for extraction are ethanol and C02. C02 extraction involves filtering plants through a series of chambers that control temperature and pressure. This methods isolates cannabinoids at a 90 per cent efficiency by applying different temperatures and units to the hemp or cannabis plants.
The C02 extraction method requires extremely expensive equipment that use pressurized C02 (carbon dioxide) to pull the CBD from the plant.
Ethanol extraction, however, can produce cannabis oil with up to 99 percent purity, meaning a higher quality end product. Ethanol extraction involves introducing the solvent ethanol to the hemp or cannabis plant in order to extract the cannabinoids.
So, what’s the best equipment?
Maratek & Cannabis Oil Tech is a leader in the separation of cannabis and hemp oils from ethanol and our machinery creates a finished product with over 99 percent purity.
With installations across the US and Canada our highly automated and advanced Oil & Ethanol Recovery System – Continuous (OERS-C) and our Oil and Ethanol Recovery System – Batch (OERS-B) are highly regarded within the industry.
Our machinery, which is designed specifically for the cannabis market, requires less manpower than industry competitors and both pieces of equipment are significantly more cost-effective than using C02 extraction machines.
Here are some benefits of using Cannabis Oil Tech’s equipment:
- Our systems produce a Cannabis or Hemp oil with up to 99 percent purity.
- Can decarboxylate the oils.
- Offer both batch and continuous systems for companies of all sizes.
- Industrial quality with stainless steel, grade 304 or higher (including fittings and condenser).
- GMP compliant (Good Manufacturing Practices compliant).
- Class 1, Division 1 certified By MetLab, for explosion proofing and safety.
- Much less expensive than using CO₂ systems, Rotovaps or butane for oil production.
- Extremely safe to operate.
- Very non-labor intensive, running for hours or even up to days without needing an operator.
Find out how Cannabis Oil Tech can help your CBD extraction and contact us today!
How to Make Cannabis Oil from Trim
The Steps to Extracting Cannabinoid Oil From Trim
Whether you are a large scale grower, or a small scale operation, it is likely that you may have accumulated a quantity of trim that you don’t know what to with. The good news is that, with a little time and effort, you can create high quality cannabinoid extracts from your leftover trim in just a few easy steps. This article details the step by step process of how to make cannabis oil from trim and how the best practices you can follow to properly create high quality extracts.
Establish Your Trim Quality
Trim refers to the trichome-rich outer leaves that encompass the cannabis flower (or “bud”). The overall cannabinoid content of these leaves can range from 10-15%, and high-grade trim usually includes small flowers that cannot be sold elsewhere.
Even though many medical purveyors in oils-only states use both flower and trim as a source for the extract oils, some extractors use trim exclusively as the source material for their extractions.
Whether learning how to extract CBD, or how to extract THC from trimmings, hemp and cannabis trim can be obtained from a variety of producers, which means that the range of quality will also vary greatly.
The Four Grades of Cannabis Trim
Trim is generally classified into four grades based on a standard set of criteria, such as resin, trichome density, and several other factors used to determine its quality:
Grade 1 Trim for Extract Oil
Grade 2 Trim for Extract Oil
Grade 3 Trim for Extract Oil
Grade 4 Trim for Extract Oil
Sampling Trim for Extract Oil
Sampling is an important part of the grading exercise. For example, when a truckload of trim is purchased, Grade 1 and 2 is presented to the seller who typically makes the decision on whether the trim is “good” or “poor” quality by rubbing the material on his fingers to gauge the resin content. This method of determining good vs. poor is not objective and is very prone to mis-grading.
Measuring for Potency, Identity, and Pesticides
Many extractors believe the only time an extract needs to be measured is when the product is shipped or maybe not even at all. A more refined approach includes measuring pesticides, potency, concentration, and identity before the trim is purchased.
This is accomplished with modern-day techniques using high-performance liquid chromatography-ultraviolet (HPLC-UV), mass spectrometry (MS), and gas chromatography-mass spectrometry (GC-MS). The finger method is a good first approximation, but it can lead to erroneous results, even with an experienced buyer.
For example, some cultivars have a much higher resin content than others. And it is known that cannabinoid content varies with variety. Thus, you could be purchasing a high wax content material that would “finger test” well but have very low cannabinoid content.
How to Extract Cannabinoid Oil From Fresh Trim
There are several different methods you can use to extract hash oil from cannabis trim. Each method varies in its simplicity, scalability, and purity of output. Some of the most common extraction methods include:
- Butane extraction
- Ethanol extraction
One popular method on how to make cannabinoid oil from trim is by using a hydrocarbon solvent such as butane. Butane is nonpolar, so it is useful for extracting terpenes and cannabinoids from solution without unwanted plant material such as chlorophyll.
To avoid impurities, only high-quality commercial butane must be used for extraction. It is also necessary to purge the extract before consumption to ensure that all residual solvent has been removed. A major downfall of butane is that it is highly combustible; even a minor mistake during the extraction process could prove disastrous.
Ethanol extraction is another common botanical extraction method to consider for your cannabis trim. Ethanol is designated GRAS (Generally Recognized As Safe) by the US Food and Drug Administration, and it is highly effective at separating cannabinoids and terpenes from plant material. Like butane, though, ethanol is highly flammable – so great care must be taken when extracting cannabis oil with this method.
Ethanol is a polar solvent, so it also extracts unwanted plant material such as chlorophyll, waxes, and fats. When you want to remove the plant waxes and lipids from solution, winterization is a critical step in the process. Our popular DrainDroyd system provides a fast, simple solution for your extract filtration needs. The DrainDroyd allows you to filter and dewax up to five liters of cannabis oil in only five minutes. You can also read our post about how to remove dark colors from your extracts to learn more.
Supercritical CO2 Extraction
Using a supercritical CO2 extractor is the safest way to extract high-quality cannabis oil from trim at scale. CO2 extraction removes the high risk of flammability introduced by methods using volatile organic compounds such as ethanol.
The process of how to make THC oil, or CBD oil from cannabis biomass involves pressurizing CO2 until it turns into a liquid which is pumped through your plant matter. To separate the extracted compounds, the CO2 is converted back into a gas, leaving only the desired material behind.
Extracting THC from Trim
Though the majority of major cannabinoids are found in the flower or “bud” of the hemp or cannabis plant, with a little bit of hard work, extracting THC from cannabis trim is possible. With any of the above listed extraction methods, extracting THC is possible when done correctly.
As mentioned, the primary issue with extracting THC from trim is the quantity of trim available to the producer. Because the percentage of THC and other cannabinoids is exponentially more in the flower of the cannabis plant, it takes a very large quantity of trim to produce any kind of profitable yield when extracting THC.
The ideal choice for extracting THC is the use of cannabis or marijuana as opposed to industrial hemp. Where legal, cannabis is grown with the intentional cultivation of high levels of THC. This results in not only flower with high THC content, but trim that is “perfect” for extracting THC. Again, this will take a large amount of trim to perform, but trim produced from cannabis plants that yield higher percentages of THC are much more effective in creating THC extracts than trim produced from industrial hemp.
Refinement: Filtration, Solvent Removal & Distillation
No matter the method of extraction used, further refinement of the extracted product from your hemp or cannabis is necessary to create a safe, quality product. This is accomplished initially by filtration, solvent removal and by further distillation if possible, or necessary, depending on the scale and method of operation.
No matter the scale of extraction, filtration is necessary to remove as much of the excess plant material as possible that is co-extracted with the desired cannabinoid oil. In a small scale, or at-home extraction, this can be as simple as straining the ethanol and extraction mixture through a sieve that will catch some of the fats, waxes and other unwanted plant materials.
In a large scale extraction operation, filtration is a much more refined process that tends to remove higher levels of plant materials along with other materials that are not so easily removed like chlorophylls that can cause a dark color and less desirable taste.
Filtration on this scale is often performed with a vacuum filtration apparatus coupled with a filtration media like activated carbon. This operation takes the solvent/extract mixture and pulls it through the filter media via the vacuum filtration apparatus. This effectively removes the majority of fats, waxes and chlorophyll from the cannabinoid oil that would otherwise add an unpleasant flavor and overall harsh experience to the end product formulated by the extract. With ethanol and butane, this is the next necessary step.
However, CO2 extraction requires a winterization process as well. This combines the extract with a small amount of food grade ethanol at very low temperatures. This helps to solidify the plant waxes and fats before being introduced to the filtration process to more effectively remove the undesirable plant materials from the extracted cannabinoid oil
In a smaller scale extraction operation, solvent removal is relatively straight forward. By applying heat to the extracted oil, solvents like butane and ethanol will begin to evaporate on their own. A very simple method for even at-home extraction is applying heat to a collection vessel with hot water. Similar to a double boiler for cooking, hot water can be added to a separate vessel with the vessel used to collect your oil resting inside of it.
Because ethanol and butane are volatile at higher temperatures, the increased heat from the hot water vessel will allow some of the solvent to evaporate from the cannabis or hemp oil extract. On a small scale, this may be the final step that will yield a relatively potent, quality product for personal consumption.
On a larger scale, specialized solvent removal equipment may be used for a more efficient process for higher extraction yields and increased quality. Supercritical CO2 extraction, for example, is very unlikely to be performed at a smaller scale due to the equipment necessary to perform the extraction process. By default, this makes larger scale solvent removal and distillation equipment essential. This equipment often incorporates rotary evaporators or falling film evaporators.
Though the basic principle of heat application remains the same, thin film technology coupled with vacuum pressure increases the effectiveness of the solvent removal process. Using a rotating flask or vertical columns, the oil is spread across the surface of the evaporator making it easier to volatilize the solvent in the mixture. The vacuum pressure allows for the necessary temperature to volatilize those solvents even lower, increasing the effectiveness of the solvent removal process and preventing cannabinoid and terpene degradation from higher temperature application.
The intended goal is to get your extracts as close to 100% purity as possible. Filtration and solvent removal, while necessary, do not remove all of the impurities that come from the extraction process. The final distillation process allows for a cannabis or hemp oil extract that is as close to 100% purity as possible by removing the minute levels of solvents, terpenes, and other impurities.
In essence, the process is the same as solvent removal. Vacuum pressure, coupled with thin film and heat application helps to remove volatile solvents and other compounds. The difference in the final distillation process is the increase of viscosity as the extract is further refined. This is why equipment like a wiped film evaporator is used.
Again, the distillation process remains the same, but to combat that high viscosity, a wiped film uses a wiper blade to spread thin the distillate on the column of the evaporator so that the volatilization process can be increasingly effective. Doing this in a large-scale operation can result in potency levels near 100% whether that extraction method is ethanol, CO2 or hydrocarbons like butane.
In a smaller scale extraction operation, this final distillation process may not be entirely feasible. Because the solvent removal process is technically a distillation process, it may not be necessary (or possible) to perform proper distillation with a lack of equipment like a wiped film evaporator.
That said, creating a safe, potent extract on a smaller scale without higher tech distillation equipment can still be accomplished on a scale of personal use and should be relatively effective after the mentioned solvent removal process.
extraktLAB has the Extraction Solution You Need
extraktLAB specializes in CO2 extraction equipment. Our high throughput supercritical CO2 extraction machines can produce 600 to 1,200 grams of extract per hour. We offer a variety of options suited to fit your desired level of output. You can view more information by visiting our Supercritical CO2 Extractors page which we have detailed guide about hemp processing, hemp extraction, extraction method and CO2 extraction process.
For more information about any of our products give our sales team a call at 651-600-0036.