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Method for extracting cannabidiol from cannabis

A technology of cannabidiol and marijuana, applied in the field of cannabidiol extraction, can solve the problems of psychotoxic component tetrahydrocannabinol residue and low purity of cannabidiol

Active Publication Date: 2017-06-13
YUNNAN HANSU BIO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention aims to provide a method for extracting cannabidiol from marijuana, so as to solve the problems in the prior art such as the low purity of cannabidiol extracted and the residue of psychotoxic component tetrahydrocannabinol.

Method used

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  • Method for extracting cannabidiol from cannabis
  • Method for extracting cannabidiol from cannabis
  • Method for extracting cannabidiol from cannabis

Examples

Experimental program
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Effect test

Embodiment 1

[0086] Embodiment 1: Prepare cannabidiol according to the following method

[0087] The embodiment part provides that the method of the present invention is used to prepare cannabidiol under different technical parameters. 10 kg, no further description below.

[0088] 1) crush the flowers and leaves of industrial hemp, pass through an 80-mesh sieve, and dry at a temperature of 60° C. for 3 hours to obtain medicinal material powder, whose moisture content is measured to be 4%;

[0089] 2) The above medicinal material powder was reflux extracted 3 times with twice the amount of 30% (V / V) ethanol, each time for 0.5h, to obtain an extract;

[0090] 3) The relative density measured when the above extract was concentrated to 50°C was 1.05 to obtain the extract;

[0091] 4) Use 1 times the amount of purified water for the above extract, and sink it in water at a temperature of 20°C for 1 hour to remove impurities and obtain a water sinking liquid;

[0092] 5) Centrifuge the above-...

Embodiment 2

[0098] Embodiment 2: prepare cannabidiol according to the following method

[0099] 1) Pulverize the flowers and leaves of industrial hemp and pass through a 10-mesh sieve to obtain medicinal material powder. Dry at a temperature of 200°C for 0.5h to obtain medicinal material powder, and its moisture content is measured to be 2.7%;

[0100] 2) Ultrasonic extraction of the above-mentioned medicinal material powder with twice the amount of 100% (V / V) ethanol for 1 hour each time to obtain an extract;

[0101] 3) The relative density measured when the above extract was concentrated to 50°C was 1.35 to obtain an extract;

[0102] 4) Submerge the above-mentioned extract with 10 times the amount of purified water at a temperature of 0°C for 48 hours to remove impurities and obtain a water-sinking solution;

[0103] 5) Centrifuge the above-mentioned water sedimentation liquid at a speed of 10,000 rpm, add 10% (V / V) ethanol to the precipitate obtained by centrifugation to dissolve, ...

Embodiment 3

[0109] Embodiment 3: Prepare cannabidiol according to the following method

[0110] 1) The flowers and leaves of industrial hemp were crushed, passed through a 40-mesh sieve, and dried at a temperature of 130° C. for 1.7 hours to obtain medicinal material powder, the water content of which was measured to be 3.1%.

[0111] 2) Soak and extract the above medicinal material powder with 5 times the amount of 60% (V / V) ethanol for 2 times, each time for 2.5 hours, to obtain an extract;

[0112] 3) The relative density measured when the above extract was concentrated to 50°C was 1.2 to obtain the extract;

[0113] 4) Submerge the above-mentioned extract with 5 times the amount of purified water at a temperature of 10°C for 24 hours to remove impurities and obtain a water-sinking solution;

[0114] 5) Centrifuge the above-mentioned water sedimentation liquid at a speed of 7500 rpm, add 60% (V / V) ethanol to the precipitate obtained by centrifugation to dissolve, and obtain an alcohol...

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Abstract

The invention discloses a method for extracting cannabidiol from cannabis. The method comprises the following steps: smashing and drying extraction fractions of cannabis to obtain medicine material powder; extracting the medicine material powder with 30% to 100% (V / V) of ethanol to obtain an extracting solution; concentrating the extracting solution to obtain an extract; carrying out water precipitation on the extract, and removing impurities to obtain a water precipitation solution; centrifuging the water precipitation solution and adding 10% to 100% (V / V) of ethanol into an obtained precipitate, and dissolving the precipitate to obtain an alcoholic solution of the precipitate; carrying out column chromatography on the alcoholic solution of the precipitate; eluting an obtained eluant after the concentration column chromatography, and adding ethanol for supersaturated dissolution to obtain a crystal substance; adding the crystal substance into purified water or ethanol for washing to obtain a primary product; blending the primary product with purified water, and drying to obtain the cannabidiol. Only highly safe ethanol is adopted as a solvent, the purity of the cannabidiol in a finished product is improved, and the psychotoxic component of tetrahydrocannabinol is also removed, so that the product safety is improved, and the method is applicable for industrial production.

Description

technical field [0001] The invention relates to a method for extracting cannabidiol from cannabis, in particular to a method for extracting cannabidiol from industrial hemp flowers and leaves. Background technique [0002] Cannabis (scientific name: Cannabis sativa L.) is a plant of the Cannabis family and the genus Cannabis, also known as hemp, hemp, hemp, mountain silk seedlings, and jute. It has important agricultural and medicinal values. Marijuana contains a toxic component THC (tetrahydrocannabinol), which can make people hallucinogenic and addictive, and can be used as a drug. It was banned for a long time. [0003] Due to the high economic and medicinal value of hemp, the raw material hemp exclusively for industrial use is referred to as "industrial hemp". The value of the toxic component tetrahydrocannabinol or directly as a drug can be legally carried out in large-scale cultivation and industrial development and utilization. [0004] At present, more than 500 sub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/68C07C37/82C07C37/84C07C39/23
CPCC07C37/685C07C37/82C07C37/84C07C39/23C07C37/68C07C2601/16C07C39/42
Inventor 张可谭昕高伟博常坦然
Owner YUNNAN HANSU BIO TECH CO LTD
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