US10238706B1 – March 26, 2019 – Condensible gas botanical extraction systems and methods

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Inventors :

Istok Gorazd Nahtigal

Owner :

MedReleaf Corp.

Application Number :

US15842054

Document Number :

US10238706B1

Priority Date :

December 14, 2017

Filing Date :

December 14, 2017

Date of Grant/ Publication :

March 26, 2019

Class :

; A61K36 / 00; A61K36 / 185; B01D11 / 02; A61K31 / 352

Abstract

An apparatus for the extraction of compounds from botanical material using a condensable gas solvent includes an extraction chamber wherein the feedstock is extracted while in a frozen state.

Claim(s)

1. A method for extracting at least one compound from cannabis using a condensable gas solvent, the method consisting essentially of: (a) providing cannabis to an extraction chamber wherein water in the cannabis is in a solid phase; (b) extracting at least one compound from the cannabis using the condensable gas solvent while maintaining the cannabis in a frozen state and obtaining condensable gas solvent containing the at least one extracted compound; (c) withdrawing a solvent stream containing the at least one extracted compound from the extraction chamber; (d) conveying the condensable gas solvent containing at least one compound extracted from the cannabis along a solvent flow path extending from the extraction chamber to a heating zone; (e) heating the condensable gas solvent from step (d) and conveying the condensable gas solvent from the heating zone proximate to an inlet of a flow nozzle at conditions at which the condensable gas solvent is at least primarily in a gaseous phase; and, (f) directing the condensable gas solvent to a cyclone chamber and operating the cyclone chamber at conditions at which the condensable gas solvent within the cyclone chamber is primarily in a gaseous phase and the at least one compound extracted from the cannabis is primarily in a liquid phase, wherein the condensable gas solvent is selected from the group consisting of carbon dioxide, Xenon, nitrous oxide, ethane, propane, butane, cyclopropane and sulfur hexafluoride.

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