Our pilot solvent extraction equipment is specially designed for mini or small scale natural material extracting production. In addition, it is ideal for qualitative tests at the laboratory. It can be used to extract permium quality precious plant oils, essential oils, animal oils, microalgal oil, natural pigments, vegetable proteins, plant spices and more. And, it is the popular essentail oil extraction kit /unit  in the market.

Flow Chart of  Essential Solvent Extraction Kit

The pilot solvent extraction unit is the best choice for essential oil extracting. It adopts low temperature subcritical biological extraction technology to process raw materials. The main solvents in application are liquid propane, butane, dimethyl ether, R134a and liquid ammonia. Under room temperature (low temperature) and certain pressure, it utilizes liquefied sub-critical solvents to process raw materials through countercurrent extraction, further obtains the extract liquor (liquid phrase) and raffinate (solid phrase). The solvents in extract liquor will be separated with target composition through vaporization in the process of distilling (vaporizing), which brings the final products. Meanwhile, the solvents absorbed in the raffinate, also refers to the extracted material, will be distilled out, and the raffinate through distilling will be become another product. It’s also worth mentioning that vaporized solvents can be liquefied for recycle uses. The whole process is going under room temperature, therefore, thermosensitive substance within raw material can be better protected.

· Advanced and careful design: it’s equipped PLC computer control and features quick-opening structure.

· It automatically controls the ratio of material and solvent, extraction time, extraction temperature, and extraction pressure.

· It is pretty easy to operate and offers precise data.

It’s widely used among scientific research institutions and colleges.

Advantages of Subcritical Oil Extraction Machine

Subcritical extraction is the drawing out of active substance from natural plants, animals and any other bio material. Pressure of approximately 0.3-0.8 MPa is used in the extraction process using the gaseous agent that turns fluid In such kind of pressure. The state is necessary as it increases permeability, transfer rate and dissolving capability. It has proved effective and efficient in the extraction of oils such as essential and solvent extraction oils; also the plant proteins and natural pigments. 

Low Temperature Solvent Extraction Process

Capacity range: 0.1~200 T/D

 How Subcritical Extraction is Better than Traditional Solvent Extraction?

It ensures the residual solvent is <50ppm with residual oil less than 1% Whatever remains from residual oil meals or cakes still retain their natural active ingredients thus rendering

them of high and better quality than those which traditional oil mill was used on. Solvent needed for processing is less than 8kg way lower than what could have been spent in traditional solvent extraction.

Great deal of energy is saved because steam is not necessary. Subcritical extraction is the best when it comes to extraction of precious oil, vegetable protein or natural pigment. It has high extraction ratio as compared to the traditional method. The environment is well catered for. There is zero pollution due to discharge.

 How Subcritical is Better than Supercritical Extraction?

The word "super" before supercritical does not necessarily make supercritical extraction better than subcritical in any way. On the contrary, it still retains the benefits of supercritical extraction and beats it further on the following:

· You need less capital investment to start it.

· You will incur lower production costs as compared to when you were running supercritical.

· It makes it easier to run it even in a larger industrial scale.

· Less pressure required which translates to lower cost of equipment needed.

· The less pressure also comes in handy in terms of industrialization scale production with which would not be possible in supercritical extraction.