The fully UL Certified triple-packed compressor system provides the safest and most reliable gas containment for indoor or outdoor use. 

The only fully UL Certified Plant Oil Extraction Compressor System

Corken has been the leading manufacturer of industrial pump and gas compression solutions for the LPG, petrochemical, chemical, and gas processing industries since 1924.

One of Corken’s most innovative vapor recovery compressor is the E91 triple-packed compressor for plant oil extraction.  Plant compounds/substances have provided nutritional and medicinal benefits since the beginning of time.  As scientists learned more about the healing properties of various plant materials, they began using plant oil extraction to separate the desired components on a large scale.

More recently, CBD is a growing opportunity for plant oil extraction.  Desirable compounds such as cannabidiol (CBD), tetrahydrocannabinol (THC), and terpenes are separated from the rest of the plant using hydrocarbon extraction. Other forms of extraction include ethanol and carbon dioxide (CO2); however, hydrocarbon is a more widely used since it’s more efficient and cost effective.

Regulatory Compliance is Critical.

Given the various indoor manufacturing environments involved in plant oil extraction, it is more critical than ever to ensure the equipment used has been fully UL Certified for Indoor Use.   The Corken E91 compressor is the only fully UL Certified compressor system for the plant oil extraction industry.  Additionally, Corken is certified to Good Manufacturing Practice (GMP), European Union ATEX Directive, European Union Machinery Directive, ISO 9001 Standard on Quality Management Systems, and ISO 14001 Standard on Environmental Management Systems.

Technical Literature

The E91 Technical Brochure

Technical Specifications (Model T91 (E91) Oil-Free Gas Compressor/Vapor Recovery Pump)

Service Bulletin (Oil Recommendations for Food Grade Applications)

Botancial Oil Extraction Using a Reciprocating Compressor/Vapor Recovery Pump

Hydrocarbon Extraction Has Four Primary Steps:

Step One (Washing): A cold solvent made of propane or butane-washes over the plant material (biomass) at a low temperature and pressure. This process removes the cannabinoids and terpenes from the biomass and dissolves them into the liquid solvent.

Step Two (Removing the Impurities): This step removes any waxes and lipids left in the solution. Unlike ethanol extraction that requires a day-long winterization process, hydrocarbon extraction has fewer waxes and lipids so the removal process is easier and does not take as much time. In most closed loop systems, a de-waxing column filters out any of the remaining waxes and lipids.

Step Three (Collection): The filtered solvent solution is collected into a new or separate container and the hydrocarbon solvent (propane, butane, or propane butane mix) is purged. Corken’s gas compressors (also known as recovery pump) remove the vapor formed by the solvent solution within the collection tank and returns it to the supply tank so it can be re-circulated.

Step Four (Purification): Depending on the desired final state of the product, a purification process may be necessary. Various methods such as a vacuum purge, centrifugal, and co-solvent separation are used to further refine the product.

Process Map for Botanical Oil Extraction

Please contact us at cocsalesdept@idexcorp.com with any questions.