Eastman explains that active recovery utilizes a gas compressor or pump to pull the solvent out of the oil and push it back into the solvent tank. The solvent is removed from the collection vessel through active or passive recovery.The raw plant (biomass) is loaded into the extractor and solvent (butane) is applied to the material.“The process is performed in a classified room, free of any potential ignition sources as hydrocarbon gases are highly flammable.” says Kim Eastman, vice president of manufacturing at Jushi. Closed-loop systems are far safer, although strong precautions should be taken even when utilizing state-of-the-art equipment. BHO extraction can theoretically be carried out in an open system, but this method is notoriously unsafe and is not used by commercial extractors. What is a BHO extractor?Įquipment typically includes closed-loop hydrocarbon extractors, de-waxers, filtration columns, vacuum ovens, and pressure vessels. The solution is then deposited in the collection vessel and the solvent is removed to leave the extract, which may go through post-processing to achieve the desired final product. As propane has an even lower boiling point than butane, it is often used to strip additional compounds (such as additional terpenes) from the plant. The liquid butane is washed over the raw plant dissolving desirable components including cannabinoids (THC, CBD, and others) and terpenes. In BHO extraction, butane (usually n-butane) is used in its liquid form, which means maintaining a temperature of -40☏ (-40☌). Butane is ideal for cannabis extraction as it has a low boiling point of 30.2☏ (-1☌), which makes it relatively easy to remove the solvent from the concentrated solution post extraction. That said, some extraction techniques will utilize a hydrocarbon blend, often with propane or isobutane added to the mix. The key component in BHO extraction is high-purity butane. “The process consists of using a closed-loop hydrocarbon extractor, filling it with cannabis, then passing the solvent through the cannabis,” Nate Ferguson, master extractor and co-founder of Jetty Extracts, explained to Analytical Cannabis. This resin is known as butane hash oil, or shatter, and consists of purified cannabinoids and terpenes. We also discuss why many producers continue to favor this method and the types of products they are creating.īHO extraction, often referred to as hydrocarbon extraction, is the process of using hydrocarbons as a solvent to extract the resin from the cannabis plant. Here we reveal more about BHO extraction methods and how they differ from other types of extraction. This extraction process has many advantages over other techniques, but it has its drawbacks too. It uses butane as the primary extraction solvent and can yield products containing up to 90 percent THC. The process used to produce BHO from the raw cannabis plant is known as BHO extraction. BHO can be processed using various techniques to create several different products, including shatter, budder, and wax. One popular type of extract is butane hash oil (BHO), also known as butane honey oil due to the raw extract's golden color and viscous texture. The vast range of products available in the cannabis industry includes a multitude of extracts.
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