SYSTEMS AND METHODS FOR CLOSED LOOP SOLVENT EXTRACTION AND PURIFICATION

摘要

Provided herein are systems and methods for the facile extraction and purification of oils from plant material, including cannabis and hemp. The systems and methods herein are versatile, and may utilize a wide range of solvents to extract oils from a variety of plant-based material. Further, the provided systems and methods are closed loop, reducing the loss solvent and decreasing the risk of safety concerns such as human exposure to solvent chemicals or explosion of volatiles. In some embodiments, the systems and methods remove impurities from the extracted oils, for example waxes or other precipitates, and provide a higher purity and higher quality extract.

主权项

1. A method for closed loop extraction of oils from plant material, said method comprising the steps of:
providing an extraction system comprising:
a solvent vessel for containing a solvent;an extraction vessel removably connected to said solvent vessel; anda collection vessel removably connected to said extraction vessel and removably connected to said solvent vessel, wherein said collection vessel is positioned gravitationally lower than said extraction vessel; filling said solvent vessel with said solvent; heating said solvent vessel, thereby flowing said solvent from said solvent vessel into said extraction vessel, wherein said solvent extracts oils from said plant material; heating said extraction vessel; cooling said collection vessel to a temperature lower than a temperature of said solvent vessel, thereby flowing said solvent and oils into said collection vessel; and heating said collection vessel to evaporate said solvent thereby returning at least a portion of said solvent to said solvent vessel and leaving at least a portion of said oils in said collection vessel.