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Eucalyptus Oil CO2 Extraction Method & CO2 Extraction Equipment

300L Supercritical CO2 Extraction Equipment
300L Eucalyptus Essential Oil CO2 Extraction Equipment

CO2 Extaction Method for Eucalyptus Essential Oil


Eucalyptus grandis leaves are washed and disinfected, dried at low temperature (not higher than 50°C), pulverized into powder, passed through a 40-60 mesh sieve, and stored in a desiccator for later use.

CO2 Extraction

Weigh 150g of eucalyptus leaf powder into the extraction kettle, assemble it according to the procedure, check the airtight performance of the entire extraction system, and after the system is well airtight, use an entrainer pump to inject 30mL of entrainer (90% ethanol solution), adjust When the temperature and pressure reach predetermined values, extraction is carried out under supercritical conditions, and the experiment reaches the required time. The volatile oil of eucalyptus leaves is collected, and the extraction rate is calculated.

300L supercritical CO2 extraction equipment
Eucalyptus Oil CO2 Extraction Equipment

Eucalyptus Oil CO2 Extraction Process

  • Eucalyptus powder: 150g;
  • Granularity: 50 mesh;
  • Extraction pressure: 403 bar;
  • Extraction temperature: 75℃;
  • Separation pressure: 80 bar;
  • Separation temperature: 55℃;
  • Cosolvent: 90% ethanol, 30 ml;
  • Time: 480 minutes
  • Eucalyptus oil extraction rate: 6.83%.
300L supercritical CO2 extraction equipment
Eucalyptus Oil CO2 Extraction Equipmentnt

300L CO2 extraction equipment


The 50L×6 supercritical CO2 extraction equipment consists of six 50L extraction kettles, the maximum working pressure is 400bar, and the PLC control system is Siemens.
Equipped with three separation kettles and three sets of filters to obtain a better extraction effect.
50L×6 supercritical CO2 extraction equipment high-performance supercritical oil production equipment has the best flow rate and reliability on the market today!
Our extraction system through temperature, high pressure and unparalleled control of the automated process can provide high quality, and even provide essential oils immediately on the shelf, thus helping you save time and increase profits.
The 50L×6 supercritical CO2 extraction equipment very suitable for almost all applications from essential oils to pharmaceutical companies!
There are also companies in China that combine several 50L×6 supercritical CO2 extraction equipment into a sea buckthorn oil extraction plant.

300L supercritical CO2 extraction equipment
Eucalyptus Oil CO2 Extraction Equipmentnt


Volume50 L, 6 setsVolumeⅠ 20 L, Ⅱ Ⅲ 17L
Max Working Pressure380barMax. working pressure Ⅰ 200bar, Ⅱ Ⅲ 180bar
Outlet pressure380 barOutlet pressure380 bars
Max. flowrate1000L/hMax. flowrate20L/h
Volume110 LParameters controlPLC / PC-based software with recipe for automation
Working pressure85 bar Screen/Datalogging7 inches/Included
Power/CO23 phase/Food grade ≥99.5%HS code:8479200000
Installation12600×9000×5000mmAirport /Port of Lading:Shanghai  
Max Working Pressure500-700barFractionating column300par 4-section gradient temperature control
300L supercritical CO2 extraction equipment
Eucalyptus Oil CO2 Extraction Equipmentnt


  • Easy to operate and adjust, with good selectivity; pressure and temperature can be controlled independently.
  • Low working temperature, extraction at room temperature.
  • Energy saving and environmental protection, no toxic solvent residues.
  • CO2 can be recycled, low operating costs.
  • The new supercritical fluid distribution scheme, the CO2 fluid is in uniform contact with the solute, the dissolution rate is fast, the extraction time is short, and the efficient extraction system.
  • The extraction vessel measures the temperature independently and accurately controls the temperature.
  • Four-fold safety protection to protect production safety.

Eucalyptus leaf essential oil

The main components of eucalyptus leaf volatile oil are 8-cineole, pinene, citronene, citral, rosinol and 1-acetyl-
4-isopropylidene cyclopentene, etc., also contains rutin, quercetin, quercetin, L(+)-homoserine, and also separates eucalyptus. Eucalyptus Oil
It has strong bactericidal ability, and also has antioxidant activity. The various biological activities of eucalyptus oil are related to its antioxidant activity, which can eliminate hydroxyl radicals and improve inflammation symptoms. In addition, eucalyptus oil has anti-inflammatory, infiltration-promoting, insecticidal, mosquito-repellent and antipruritic effects, and has also obtained a large number of research results and clinical verification

CO2 Extractio Method

There are a total of 7 processes in the common CO2 extraction method:

  1. Biomass drying
  2. Grinding
  3. Fill Biomass
  4. Pressurize with CO2
  5. Run in Closed Loop
  6. Periodically
  7. Depressurize
supercritical CO2 extraction method
supercritical CO2 extraction process diagram
Supercritical CO2 extraction method
Low temperature drying for roses

Biomass (flowers, leaves, seeds, rhizomes, etc.) is much easier to buck when it includes less than 10% moisture.
Dry biomass to moisture content below 10%.
As an alternative to machinery, many farmers let their crops dry in the field. This works well as long as the harvest time is cool and dry.

Supercritical CO2 extraction method
Grinding for cannabis

Once the biomass has been dried, it is granulated. In general, smaller particles (30-80 mesh) are desirable and tighter particle diameter distributions are better for extraction throughput.
Important: Before grinding (pulverizing) large chunks of biomass, it needs to be divided into flakes and sent to a pulverizer for grinding. This avoids the high temperature generated by the high-speed pulverization of biomass in the pulverizer, which destroys the characteristics of the extract and loses part of the essential oil.

CO2 extractor
CO2 extracting kettle

Load Extraction Vessel with biomass.

Bring each vessel to working pressure using CO2 from supply cylinders.

In Extraction Vessel, compounds are pulled from biomass into solution.
Solvent (CO2) is boiled out of solution in Separator 1.
Evaporated CO2 is condensed into liquid and stored in Accumulator.

Supercritical CO2 extraction method
Supercritical CO2 extraction method

Open valve on the separator to collect extract.

After allotted run time, system is depressurized by releasing CO2 through Separator 3.

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