Recycling cannabinoid extractor

An apparatus for extracting cannabinoids from cannabis plant matter comprising:

• a solvent tank,
• liquid solvent, wherein the liquid solvent is initially contained within the solvent tank,
• a hopper,
• a secondary vessel,
• one or more valves,
• a first pump of one or more pumps that moves at least some portion of the liquid solvent from the solvent tank to the hopper, the liquid solvent contacting cannabis plant matter in the hopper creating a cannabinoid containing eluate in the at least some portion of the liquid solvent, wherein:
• the first pump of the one or more pumps is a vacuum pump that also removes at least a portion of oxygen from the hopper, wherein a first hose connects the vacuum pump to a top of the hopper, a second hose connects the vacuum pump a bottom of the hopper, and a third hose connects the vacuum pump to the solvent tank, and
• a gas other than oxygen that moves through a first valve of the one or more valves replacing the at least a portion of oxygen, and
• a first pipe of one or more pipes through which at least a portion of the eluate from the hopper is moved to the secondary vessel.