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Z-ARCHIVE-Cannabis

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Patent US10765965


Issued 2020-09-08

Systems, Methods, And Equipment For Chemical Extraction

Novel thermal evaporative processes for the recovery of heat-sensitive constituents, raw essential oil concentrates, and other compounds from plant biomass material are disclosed, as are systems for implementing such processes. Particularly, the processes include a solvent-less process for either batch-wise or continuous removal and recovery of refined oils, such as volatile aroma components and heavier oils, from plant material.


Classification


Slightly More than Average Length Specification


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USPTO Full Text Publication >

4 Independent Claims

  • Independent Claim 1. A method for extracting at least one chemical compound from plant material without the use of a solvent, comprising: a) preparing a feedstock by at least one ofchopping, cutting, treating, pelletizing, and grinding the plant materialb) preheating the feedstock to a first temperature at atmospheric or sub-atmospheric pressure for a preselected time to form a preheated feedstockc) heating the preheatedfeedstock to a second temperature at sub-atmospheric pressure in an evaporation chamber to form a heated feedstockd) introducing a heated motive gas through the evaporation chamber to drive the at least one chemical compound from the heated feedstock,thereby forming a pregnant motive gasand e) condensing a portion of the pregnant motive gas to recover the at least one chemical compound.

  • Independent Claim 12. A system for extracting at least one chemical compound from plant material without the use of a solvent, comprising: a) a feedstock preparation unit, configured to size-reduce the plant material by at least one of chopping, cutting,grinding, and shredding to form a feedstockb) a preheater, configured to receive the feedstock from the feedstock preparation unit and heat the feedstock at sub-atmospheric or atmospheric pressure to drive off moisture and low-boiling volatilecomponents to form a preheated feedstockc) a vacuum evaporator, configured to receive the preheated feedstock from the preheaterd) a means for introducing a motive gas to the evaporator to form a pregnant motive gasand e) a recovery unit,configured to receive the pregnant motive gas from the evaporator and to condense the pregnant motive gas to recover the at least one chemical compound.

  • Independent Claim 15. A system for extracting at least one chemical compound from plant material without the use of a solvent, comprising: a) a feedstock preparation unit, configured to size-reduce the plant material to form a feedstockb) a preheater,configured to receive the feedstock from the feedstock preparation unit and heat the feedstock at sub-atmospheric or atmospheric pressure to drive off moisture and low-boiling volatile components to form a preheated feedstockc) a means for deliveringa motive gas to the preheater to form a first pregnant motive gasd) a first recovery unit, configured to receive the first pregnant motive gas from the preheater and condense the pregnant motive gas to recover moisture and low-boiling volatilecomponentse) a vacuum evaporator, configured to receive the preheated feedstock from the preheaterf) a means for introducing a motive gas to the evaporator to form a second pregnant motive gasand g) a second recovery unit, configured to receivethe second pregnant motive gas from the evaporator and to condense the second pregnant motive gas to recover the at least one chemical compound.

  • Independent Claim 18. A continuous method for extracting a chemical compound from solid plant material without the use of a solvent, comprising: a) providing a continuous flow of solid plant materialb) contacting the solid plant material with an introducednon-oxidizing motive gas stream at sub-atmospheric pressure to form a pregnant motive gas comprising the chemical compoundand c) condensing the chemical compound from the pregnant motive gas.