Method for producing an extract from cannabis plant matter, containing a tetrahydrocannabinol and a cannabidiol and cannabis extracts
First Claim
1. A process for producing an extract containing tetrahydrocannabinol, cannabidiol and optionally the carboxylic acids thereof from Cannabis plant material, wherein the dried plant material is comminuted;
- characterized in that said plant material is extracted by means of CO2 under supercritical pressure and temperature conditions at a temperature in a range of approx. 31°
C. to 80°
C. and at a pressure in a range of approx. 75 bar or 500 bar, or is extracted in the subcricital range at a temperature of approx. 20°
C. to 30°
C. and a supercritical pressure of approx. 100 bar to 350 bar;
or is extracted under subcricital pressure and temperature conditions; and
the obtained primary extract is separated out under subcricital conditions or under conditions subcricital in terms of pressure and supercritical in terms of temperature.
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Abstract
The invention relates to a method for producing an extract from cannabis plant matter, containing tetrahydrocannabinol, cannabidiol and optionally the carboxylic acids thereof. According to said method, the dried plant matter is ground and subjected to a CO2 extraction and the primary extract obtained is separated. The invention method permits Δ8 or Δ9 tetrahydrocannabinol to be selectively obtained both from industrial hemp and from drug-producing hemp, optionally after dissolving the primary extract in ethanol, separating undesirable waxes and removing the solvent under reduced pressure.
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Citations
14 Claims
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1. A process for producing an extract containing tetrahydrocannabinol, cannabidiol and optionally the carboxylic acids thereof from Cannabis plant material, wherein the dried plant material is comminuted;
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characterized in that said plant material is extracted by means of CO2 under supercritical pressure and temperature conditions at a temperature in a range of approx. 31°
C. to 80°
C. and at a pressure in a range of approx. 75 bar or 500 bar, oris extracted in the subcricital range at a temperature of approx. 20°
C. to 30°
C. and a supercritical pressure of approx. 100 bar to 350 bar;
oris extracted under subcricital pressure and temperature conditions; and
the obtained primary extract is separated out under subcricital conditions or under conditions subcricital in terms of pressure and supercritical in terms of temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
characterized in that it may be obtained through a process in accordance with any one of claims 1 to 7; - and
in that it contains at least reduced proportions of monoterpene and sesquiterpene hydrocarbons, alkaloids, flavonoids and chlorophylls.
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9. A primary extract according to claim 8, characterized in that tetrahydrocannabinol includes at least Δ
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9-tetrahydrocannabinol and/or Δ
8-tetrahydrocannabinol and/or the carboxylic acids thereof.
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9-tetrahydrocannabinol and/or Δ
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10. A primary extract according to claim 8 or 9, characterized in that tetrahydrocannabinol and/or the carboxylic acids thereof are the main constituent if a hemp of the drug type is used as a starting material.
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11. A primary extract according to any one of claims 8 to 10, characterized in that cannabidiol and/or the carboxylic acids thereof are the main constituent if a hemp of the fiber type is used as a starting material.
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12. A primary extract according to any one of claims 8 to 11, characterized in that it is dissolved in ethanol, separated from waxes not soluble therein, and the solvent is again removed under reduced pressure.
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13. A process for producing tetrahydrocannabinol from the primary extract in accordance with any one of claims 8 to 12,
characterized in that in the primary extract cannabidiolic acid and tetrahydrocannabidiolic acid are decarboxylated into cannabidiol and tetrahydrocannabinol through increase in temperature; -
the decarboxylated primary extract is dissolved in the CO2 extracting agent used, and in this condition is treated by means of a high-pressure vessel charged with a catalyst for anellation of cannabidiol into tetrahydrocannabinol and a water-binding agent, wherein cannabidiol is reacted to give tetrahydrocannabinol; and
the product enriched in tetrahydrocannabinol is separated at pressure and temperature conditions subcricital for CO2.
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14. A process for producing cannabidiol from the primary extract in accordance with any one of claims 8 to 12,
characterized in that in the primary extract cannabidiolic acid and tetrahydrocannabidiolic acid are decarboxylated into cannabidiol and tetrahydrocannabinol through increase in temperature; - and
subsequently the cannabidiol is separated through column chromatography on silica gel or preparative high-pressure liquid chromatography.
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Specification