Patent ID: 9655937
Date: 2017-05-23
CPC Classifications: A61K,B01D,C11B

Claim:
1. An extraction method, comprising: causing, via a controllable solvent reservoir flow control feature, at least a portion of a stored solvent in a liquid phase that is stored in a solvent reservoir to be released through a first connector and into a plant material reservoir structured to be in fluid communication with the solvent reservoir; exposing plant material housed in the plant material reservoir to the released solvent in the liquid phase to produce a solvent-extract solution; releasing at least a portion of the solvent-extract solution from the plant material reservoir into a collection reservoir; causing at least a portion of the solvent to separate from the solvent-extract solution in the collection reservoir to produce an a solvent in a gaseous phase and extracts; releasing at least a portion of solvent the solvent in a gaseous phase from the collection reservoir into a solvent return, the solvent return providing fluid communication between the collection reservoir and the solvent reservoir; manipulating a controllable solvent return flow control feature to selectively cause at least a portion of the solvent in a gaseous phase to flow through the controllable solvent return flow control feature; and in one or both of the solvent return and the solvent reservoir, causing a solvent in the gaseous phase to re-condense from the gaseous phase back into the liquid phase; recovering the solvent in the liquid phase in the solvent reservoir, the solvent return forming a sealed, closed-cycle solvent recovery pathway between the collection reservoir and the solvent reservoir.