The top techniques for cannabis extraction are revolutionizing the cannabis industry, playing a key role in recreational and medical markets. Extracting concentrates from marijuana plant material is achieved via both natural and chemical methods.
Solvent-free methods include ice water, heat, and pressure, whereas solvent-based methods utilize substances such as CO₂, butane, or ethanol to separate cannabinoids and terpenes from the cannabis plant.
Each method has its pros and cons. If you are a cannabis extraction entrepreneur, it’s important to weigh the benefits and advantages of the various extraction processes available, as different techniques lead to different outcomes.
The following are four popular methods for stripping cannabis plant material of its compounds, for potent, flavorful concentrates:
1. Rosin Pressing
Rosin pressing is the leading solventless extraction method. It involves applying heat and pressure to cannabis flower, hash, or kief, causing resin to flow out as golden concentrate. Because it avoids solvents, rosin is free from chemical residues and is valued for its preservation of terpenes, flavor, and purity.
Lowtemp Industries is a top manufacturer of solventless cannabis extraction equipment, offering rosin presses, plates, and accessories engineered for consistency and durability. Their equipment helps both commercial operators and home labs create premium solventless extracts while maintaining efficiency and repeatability. Lowtemp’s rosin presses achieve this repeatability through precise temperature control, even heat distribution across aluminum plates, and adjustable pressure systems that maintain consistent yields with every press.
Rosin pressing has several advantages:
- Purity: No solvents means no risk of leftover chemicals.
- Flavor: The process preserves delicate terpenes.
- Accessibility: Presses range from small-scale to professional-scale systems in series.
Features like digital heat controllers, pressure gauges, and modular plate configurations—found in professional-grade equipment—allow operators to fine-tune each variable for predictable outcomes. This combination of mechanical precision and controlled heat application makes rosin pressing one of the most reliable solventless extraction techniques available today.
2. Supercritical CO₂ Extraction
Supercritical CO₂ extraction uses carbon dioxide at high pressure and temperature, where it behaves like both a liquid and a gas. In this state, CO₂ pulls cannabinoids and terpenes from the plant material. Once the extraction is complete, pressure is released, and the CO₂ returns to its natural state, leaving behind pure concentrate.
CO₂ extraction offers several key benefits that make it one of the most trusted methods in the cannabis industry. It is inherently safe since carbon dioxide is non-toxic, non-flammable, and easily removed from the final product. The result is a pure, clean concentrate free from harmful residues, making supercritical CO₂ extraction ideal for producing high-quality cannabis oils and extracts used in both medical and recreational applications.
Supercritical CO₂ extraction is also widely used in other industries, such as coffee and essential oils, further solidifying its reputation as a safe and effective technique. One limitation is its high startup cost, but its scalability makes it a top choice for large-scale producers.
3. Hydrocarbon Extraction
Hydrocarbon extraction relies on solvents like butane or propane to dissolve cannabinoids and terpenes. The solution is then purged of hydrocarbons through heat and vacuum, leaving behind a potent concentrate. This method is known for producing flavorful and diverse textures such as shatter, wax, and live resin.
Hydrocarbon extraction offers several advantages. It delivers high yields by efficiently extracting cannabinoids and terpenes from the plant. The method also allows for a wide range of concentrated textures and consistencies while preserving rich, natural flavors packed with terpenes.
Keep in mind that when it comes to hydrocarbon extraction, safety is critical. Hydrocarbons are flammable, which is why professional, closed-loop systems and regulated environments like a C1D1 room are mandatory. In compliant facilities, hydrocarbon extraction remains an effective way to create flavorful concentrates.
4. Ethanol Extraction
Ethanol extraction is widely used for both cannabis and hemp. Plant material is soaked in food-grade ethanol, which dissolves cannabinoids, terpenes, and other compounds. The ethanol is then evaporated, leaving behind concentrated oil.
What are some reasons why ethanol extraction is popular?
- Efficiency: Quick and effective for producing large volumes of premium-quality extracts.
- Safety: Food-grade ethanol is safe when handled correctly.
- Versatility: Suitable for tinctures, oils, and distillates.
One drawback is that ethanol can also extract chlorophyll and waxes, which require winterization and filtration to refine the final product. Despite this, ethanol remains a convenient method for medicinal cannabis extraction.
As a recent review noted, using organic solvents is the most convenient method for medicinal cannabis extraction because they are ideal for dissolving both cannabinoids (like THC and CBD) and terpenes, allowing for high recovery rates and consistent potency.
Balance Purity and Production
Finding a balance of purity and production in your cannabis extraction methods allows you to get the most out of each batch. This means choosing a cannabis extraction method that will produce a high yield of marijuana concentrates that are safe and great-tasting for consumers.
Before selecting a technique for your business, consider whether your goal is to produce in bulk or on a smaller scale.
As a recap, here are the top techniques for isolating concentrates from cannabis plant material:
- Solventless systems, such as the rosin press, use natural elements like heat and pressure to produce golden, pure, and smooth concentrates. Rosin pressing sidesteps chemicals and produces a clean extract with maximum flavor, especially when hash is used as the starting material. This method is appropriate for small-scale home setups and boutique labs.
- Solvent-based systems, using CO₂, produce high yields, also leaving behind pure concentrates, but are capital-intensive and suitable for very large commercial businesses.
- Hydrocarbon extraction is a fast and effective way to produce marijuana extracts, but hydrocarbons are flammable. This method requires attention to safety and detail, and compliant facilities.
- Ethanol extraction leaves behind a pure and flavorful cannabis oil; extracts are produced in large quantities. However, this oil concentrate tends to contain more chlorophyll.
Every method has its strengths and weaknesses, and some will require professional equipment to produce large quantities of highly potent marijuana concentrates. Make sure you compare the advantages and disadvantages of each method in order to select the right cannabis extraction system for you.
