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A great variety of stainless steel closed loop extractors are currently for sale, with the best price and excellent service.

What is a closed loop extractor?

A closed loop extractor is a device used to extract solvents from solid substance. It’s a loop system. It is widely used for cannabis concentration in industry. In the whole process, there are several parts serving the extraction of solvents. Solvents can be used and recycled in the closed loop extractor, which is very economic for users and very environmentally friendly for people.

closed loop extractor

Basic Structure 

A closed-loop extractor mainly consists of three parts: a solvent tank, a material column and a receiving foundation. Some upgraded versions add a dewaxing column as the fourth part, or equip the material column with a dewaxing structure directly. The closed loop hydrocarbon extraction system is used to conduct a plant extraction in a sealed vacuum system. The closed-loop system can be kept during the plant extraction without exposing any solvent to the air. The butane, propane or the combination of them are generally used as the solvent.


It’s well-known that a closed loop extractor is widely used for the extraction and concentration of substances in chemical, biochemical, industrial fields and other fields. In the whole closed loop extraction equipment, people usually use ethanol as the washing solvent to extract substances from the sample materials. And a closed loop extractor is mainly used for cannabinoid extraction. In the process, cannabis leaves will be put into solvent and fully washed by ethanol. During the washing process, the cannabinoid that is soluble will be removed out and then collected in the receiving tank. The extracted cannabinoid can be used as not only medicine, but also entertainment supplies.


  • High production.
  • More than 99% of the solvent can be recovered.
  • Independent port for vacuum, injection and recovery.
  • Remove the pollution in the solvent and oil.
  • No gas exposed to air.
  • Environmental protection.

How does a Closed Loop Extractor Work?

The materials are put into the material column to get soaked by ethanol or hydrocarbon, such as butane or propane. In this process, substances get extracted. Then the mixture will be transferred into next column and get separated. The solvents will be transferred into next column and extracted substances will be saved in the bottom container for users to get. In closed loop extractor, the solvents can be recycled and used for several times.

How to Use a Closed Loop Extractor?

Closed loop extractors are widely used in a great number of fields, such as chemical, biochemical, industrial and other fields, and can be applied in the process of food, perfume and other beauty products. In recent years, closed loop extractors have become more and more well-received in the industrial field especially for the extraction of ethanol-washed cannabis.

With the rapid development of industry, the extraction of ethanol-washed cannabis has become increasingly popular around the world. Therefore, how can a closed loop extractor be used to extract marijuana by the ethanol washing. It will be introduced in the following.

Extraction of cannabis is performed by ethanol washing to extract cannabinoids from cannabis leaves through a closed loop extractor. During this process, the cannabis leaf was placed in a solvent and washed thoroughly with ethanol. The soluble cannabinoids are removed during the washing process and then collected in a collection tank. Cannabinoids are produced in two ways, one for drugs and the other for entertainment.

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