agarwood essential oil CO2 extraction machine

C-50D Supercritical CO2 Extraction Machine

Medium-sized supercritical CO2 extraction machine, each batch of 25LBS of dried and crushed hemp, is a good machine for extracting CBD oil,agarwood essential oil and Curcumin/turmeric essential oil.

100L Supercritical CO2 Extraction Machine
C-50D Supercritical CO2 Extraction Machine

Composition of C-50D supercritical CO2 extraction machine

Medium-sized supercritical CO2 extraction machine, each batch of 25LBS of dried and crushed hemp, is a good machine for extracting CBD oil,agarwood essential oil and Curcumin/turmeric essential oil.

Huaan’s CO2 supercritical fluid extraction system is mainly composed of automatic extraction kettle, CO2 raw material tank, separation kettle (gas-liquid separation tank), carbon dioxide high-pressure pump, co-solvent pump, heat exchange system, filtration system, purification system, pressure and temperature Control system, flow display metering system, rectification column, pipeline, bracket, valve, etc.
The automatic high-pressure extraction kettle is a key part of the supercritical fluid extraction equipment designed and manufactured by Huaan. These units can be used for multiple purposes;
Contrary to traditional solvent extraction systems, supercritical CO2 extraction systems are environmentally friendly, more reliable, efficient and safe. With the help of the precisely designed SCFE system, products of high to ultra-high purity can be obtained.

100L (50L×2) supercritical CO2 extraction machine configuration parameter table

EXTRACTORCO2 HIGH PRESSURE PUMP SEPARATOR
Volume50 L, 2 setsVolumeⅠ 27 L, Ⅱ 17L
Max Working Pressure400barMax. working pressure Ⅰ 200bar, Ⅱ 180bar
CO2 HIGH PRESSURE PUMPCO-SOLVENT PUMP
Outlet pressure400 barOutlet pressure400 bars
Max. flowrate600L/hMax. flowrate20L/h
CO2 STORAGE TANKPARAMETERS CONTROLLER/ DATALOGGING
Volume100 LParameters controlPLC / PC-based software with recipe for automation
Working pressure85 bar Screen/Datalogging7 inches/Included
OtherShipping
Power/CO23 phase/Food grade ≥99.5%HS code:8479200000
Installation5800×5000×4200mmAirport /Port of Lading:Shanghai  
Optional
Max Working Pressure500-800barBack pressure valvePneumatic control
Fractionating column300par 4-section gradient temperature control

Features of C-50F Supercritical CO2 Extraction Equipment

  • High flow rate, flow rate up to 9.75kg per minute.
  • Single container capacity: 50L, number of containers: 2
  • The extraction time is short, processing 300-360 pounds per day.
  • The two sets of extraction kettles are designed to operate, and there is no downtime between operations.
  • Carbon dioxide is continuously circulated in a closed circuit for fluid recirculation. The standard CO2 recovery system saves production costs.
  • Three separators can easily separate light and heavy components.
  • Low maintenance cost, piston seal can be replaced quickly
  • Extraction, 5G information channel, remote work, compatible with mobile interface
  • Graphic control panel, facing the future, networked production, remote control,
  • Run log record export to optimize production process
  • Database interface, production process customization
  • Friendly man-machine interface, simple operation and setting.

Supercritical CO2 extraction agarwood essential oil machine

Supercritical CO2 extraction of agarwood essential oil

Agarwood has a high status among many spices. Agarwood essential oil is an effective ingredient in agarwood, which has the effects of promoting qi and relieving pain, warming and relieving vomiting, absorbing qi and relieving asthma. After extraction, it has been widely used in medicine, cosmetics, food and other fields.

Agarwood produced in China belongs to the Agarwood plant of the genus Aquilaria, which mainly grows in Hainan, Guangdong, Fujian, Yunnan and other places. The agarwood oil produced by different origins of agarwood due to its different growth climate and microbial community is also very good in quality and quantity. Big difference.

There are very few natural formations of Agarwood in nature, and the content of active ingredients is also very low. At the same time, due to its huge use value, scholars at home and abroad have conducted a lot of research on improving the yield of active ingredients of Agarwood and its extraction efficiency.

Agarwood essential oil extraction method

The essential oil content of agarwood is very low. Technically, only water vapor distillation, solvent extraction and supercritical extraction can be used to obtain essential oils that can produce economic benefits. In order to extract as much of the essential oil components of agarwood as much as possible, it is usually necessary to crush the agarwood so that the essential oil components can be separated more easily

Steam distillation

Using the steam distillation method, the crude oil of agarwood directly obtained from the oil-water separator is milky white or light yellow with poor fluidity.


It turns into waxy at around 5°C and looks a bit like condensed milk. Its volatilization speed is medium, mellow, sweet, cool, without unpleasant odor.


The primary oil and the refined essential oil of agarwood are more clear in appearance, but in terms of other physical properties, the results obtained by using different grades of agarwood and using water vapor distillation are only different in quantity, not in quality.
In other words, using high-grade agarwood can get more essential oils, but its physical properties are basically the same as those prepared from low-grade agarwood.

Solvent extraction

Using the solvent extraction method, the extract obtained by distillation or evaporation to remove the solvent is golden yellow, and in the case of a relatively large amount, it appears black due to low transparency.


This is because the solvent extraction method will dissolve vegetable waxes, resins and pigments with more complex molecular structures. The fluidity looks good at room temperature (around 15°C) because there is a considerable amount of solvent remaining in it.
The residual solvent is removed again under vacuum conditions. The refined agarwood essential oil (volatile components) obtained by rectification is light yellow, which is similar in appearance to the product obtained by water vapor distillation, but is slightly darker than other colors (this is not very sure , Because agarwood essential oil will deteriorate and change its color due to improper storage and other reasons).


The rectification residue is very dark in color and has very poor fluidity. Sometimes it turns into waxy at around 15°C (because it contains a lot of vegetable wax).

This method is commonly used in the industry. The refined agarwood essential oil is prepared by solvent extraction, and the obtained ratio is higher than that of the steam distillation method, and the retained agarwood volatile components are rich, but this method will have solvent residues.

Method for supercritical CO2 extraction of agarwood essential oil

The supercritical carbon dioxide cryogenic extraction method can be understood as a special form of the solvent extraction method. Instead of using ordinary solvents, it uses liquid carbon dioxide under high pressure.

Under high pressure conditions, carbon dioxide can be a liquid substance with strong dissolving power. The crude oil of agarwood obtained by the supercritical extraction method is golden yellow and has poor fluidity. It turns into wax at about 10°C. This is because it contains a large amount of resin and vegetable wax, but low-temperature extraction is the biological activity of the essential oil. The proportion is high.

The taste of crude oil is very similar to that of water vapor distillation, but there is a fishy smell in its top fragrance. This fishy smell is the smell of the plant itself, but it does not appear in the product of the water vapor distillation method. It is estimated that this fishy substance has undergone some transformation after cooking.

In addition, the physical properties of the refined agarwood essential oil obtained outside of supercritical extraction are similar to the refined essential oil obtained by solvent extraction. However, the refined agarwood essential oil extracted by the supercritical CO2 extraction method has no solvent residue, which is more energy-saving and environmentally friendly than the general solvent extraction method.
The extraction rate of supercritical CO2 extraction method is more than twice that of pure water vapor distillation method and solvent extraction method, and the quality is good, the time is short and the loss is low.

Why choose CO2 extraction supercritical carbon dioxide cryogenic extraction method

CO2 extract Carbon dioxide extract shows some characteristics of essential oils and absolutes. They use cCO2 gas to extract under pressure at ambient temperature. Depending on the pressure used, a selection or total extract will be produced. Selection means using a lower pressure, and total means using a higher pressure.

Selected extracts are more like essential oils because they are usually completely fluid liquids, and essential oils make up the vast majority of extracts. The total extract contains more plant components, and is more complete spectrum or closer to the components of the whole plant, not just the essential oil components of the plant.

Because of the purity of CO2 extracts and because they have some very beneficial properties not found in essential oils, CO2 extracts are mainly used in the food, body care and herbal industries, but CO2 extracts are also very suitable for aromatherapy and natural fragrances. This extraction technique (more precisely called supercritical CO2 extraction) is a relatively new and expensive technique, in some respects more efficient than steam distillation, because the process can capture a wider range of plant components, The original plant material does not use chemical solvents to make the fragrance more real.

Other benefits are that the extraction process is carried out at a temperature lower than steam distillation, and the CO2 is non-toxic, odorless, and is easily removed from the extracted oil at the end of the process.

Agarwood essential oil extraction experiment

Agarwood is a kind of resin-containing wood, which is divided into two types: Aquilaria and Aquilaria. Agarwood is a traditional and precious Chinese medicine with extremely high medicinal value. At the same time, because of its unique fragrance, Agarwood is often used in cosmetics, perfume and other fields as a high-level fragrance, and has high economic value.

Agarwood cannot form aroma in a healthy state. The method of aroma formation can be divided into natural and artificial aroma formation, and different aroma formation methods will lead to a large difference in the chemical composition content of the extracted essential oil. The extraction of agarwood In addition to the use of mature technologies, solvent impregnation, solid phase microextraction, supercritical CO2 extraction, etc. are commonly used agarwood extraction methods. Supercritical CO2 fluid extraction and separation technology combines the characteristics of fractional distillation and liquid-liquid extraction and has extraction The advantages of low temperature, no solvent residues and high extract quality.

Molecular distillation

Molecular distillation technology is a new type of liquid-liquid separation technology that is different from conventional distillation. It uses the difference in mean free path between molecules of different substances to obtain the target product under high vacuum conditions.
It has the characteristics of low operating temperature, short heating time of materials and high distillation efficiency. It is widely used in food, petrochemical and pharmaceutical fields, especially for heat-sensitive, high boiling point or easily oxidized natural products. It also has conventional separation technology. Incomparable advantages.

Huaan BIT Supercritical Fluid Laboratory uses supercritical CO2 extraction technology to extract agarwood essential oil from Guangdong’s unique agarwood. The pretreatment process and the influence of supercritical operating parameters on the extraction effect of agarwood essential oil were investigated, and the best process parameters were obtained. A suitable extraction process was established, and molecular distillation technology was used to further separate and purify agarwood essential oil. Provide a theoretical basis for the industrial production of agarwood essential oil.

How to extract agarwood essential oil

The experimental samples were pretreated, and the white wood part of the agarwood clumps without balsam and decayed wood were artificially removed, and then pulverized with a 60 mesh grinder to obtain the fragrant powder, and then placed in a constant temperature drying box for drying at 50°C for 6 hours;
Take about 5kg of dried agarwood powder and place it in a supercritical CO2 extraction machine for extraction experiment.

The influence of extraction pressure

Extraction timeh, extraction temperature℃, investigate the extraction rate when the extraction pressure is 18, 21, 24, 27, 30MPa.
Generally, the extraction pressure has two effects on the extraction rate.

On the one hand, when the extraction pressure increases, the density of supercritical CO2 increases, the solubility of the extract increases, and the mass transfer efficiency between the solute and the solvent increases, which is conducive to the extraction of the extract. However, when the pressure is too high, too much CO2 density will reduce the mass transfer efficiency and the extraction capacity will be correspondingly weakened, and too much pressure will affect the quality of the extract and increase equipment investment. The best extraction effect is at *MPa.

Effect of extraction temperature

When the extraction time is *h, and the extraction pressure is *MPa, the extraction rate when the extraction temperature is 35, 40, 45, 50, 55℃ is investigated.

When the extraction pressure is constant, temperature is another important factor that affects the extraction rate. The effect of temperature on the extraction rate also has two effects. When the temperature rises within a certain range, it helps to increase the volatility and diffusion coefficient of the solvent.

At the same time, the rise in temperature aggravates the thermal movement of the molecules of the extract, increases the chance of intermolecular association, and promotes the improvement of the extraction rate.
But on the other hand, as the temperature increases, the distance between CO2 molecules increases and the density decreases, which is not conducive to mass transfer, which reduces the extraction yield, and too high temperature may cause the loss of volatile substances. Therefore, considering comprehensive considerations, the optimal extraction temperature is determined to be *℃.

Effect of extraction time

When the extraction pressure is *MPa, the extraction temperature is *℃, and the extraction rate is investigated when the extraction time is 0.5, 1.0, 1.5, 2.0, 2.5h.
The length of the extraction time is directly related to the amount of material and the ratio of material to liquid. When the extraction time reaches *h, the extraction rate tends to be flat, and there is almost no obvious improvement after *h. Considering comprehensively, it is better to control the extraction time at *h.

The best process conditions are: extraction pressure *MPa, temperature *℃, extraction time *h. In a certain range, the effect of extraction pressure is the most significant, followed by extraction temperature, and the effect of extraction time is relatively low.
The extraction rate of agarwood essential oil is 1.89%.

Molecular distillation experiment of agarwood

After supercritical CO2 extraction, the agarwood extract has no stratification, no precipitation, and has a three-dimensional and realistic smell, but there are still problems such as sourness and excessive impurities, so further acid removal and impurity removal are required. That is, the agarwood extract is heated and alcoholized in a special alcoholization tank: stirring is continued at 45°C, the alcoholization time is 1D, and the product obtained after alcoholization is not the target product, so molecular distillation is required to remove other impurities. To achieve the effect of further separation and purification.

Experimental results of molecular distillation of agarwood extract

Distillation orderMaterialDistillation temperature (℃)Distillation pressure (Pa)Get distillate
1Agarwood extract50200Water
2Distillate I7010Volatile Agarwood Essential Oil
3Distillate II801Agarwood essential oil

Three-stage molecular distillation is carried out, and the final residue I is volatile agarwood essential oil. The yield (referring to the amount of feed) is about 1.2%. Its color is bright yellow and reddish, with a unique rich and mellow aroma of agarwood with coolness. The smell is rich and full, with distinct layers.

Partial analysis results of essential oil components. Its main components are chromones and aromatic compounds. A total of 15 active ingredients have been isolated and identified from volatile agarwood essential oil, accounting for 19.34% of the total.

The characteristic aroma components of agarwood such as white wood aldehyde, guaiacol, agarwood alcohol, and benzyl acetone are enriched. Among them, the content of white wood aldehyde, a characteristic component of Hainan agarwood, is 0.68%, and its content is similar to that reported in literature. The percentages of aromatic compounds and chromones are 14.89% and 2.9%, respectively.

Agarwood essential oil CO2 extraction plant Cost and machine extraction co2 price

Our agarwood essential oil extraction equipment price is lower than our peers’, and our extraction equipment is high quality, we have our own manufacturing factory, all products are factory price, there is absolutely no middleman markup, we accept both small batch scale customer and large industrial batch scale wholesale customer, CO2 extraction machines and agarwood essential oil extraction machines for sale online.

Photos of supercritical CO2 extraction machine

Supercritical Fluid Systems

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100L Supercritical CO2 Extraction Machine