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Method of extracting high-purity cannabidiol from industrial hemp

A technology of cannabidiol and industrial hemp, which is applied in the field of medicine, can solve the problems of unspecified waste disposal and other issues, and achieve the effects of stable product quality, low operating pressure, and reduced dust pollution

Active Publication Date: 2019-10-08
吴平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the above-cited patents explains how to deal with wastes with a THC content exceeding 0.3% in the processing process.

Method used

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  • Method of extracting high-purity cannabidiol from industrial hemp
  • Method of extracting high-purity cannabidiol from industrial hemp
  • Method of extracting high-purity cannabidiol from industrial hemp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] Pick the cannabis flowers and leaves to remove impurities such as branches and gravel, and then dry them in the shade. Grinding with a pulverizer with dust removal function, the mesh of the crushing screen is 50 mesh, the powder is sent to the mixer, and the moisture is measured with a simple moisture meter to control the moisture content of the powder to 4-8%, and then sent to the granulator for granulation , the diameter of the prepared particles is 1 cm, and the length is 2 to 4 cm. Take 5 kg of the prepared particles and put them into an extraction bag, place them in a 29L extraction tank, inject liquid natural gas after vacuuming until the solid particles are covered, but not more than 4 / 5 of the total volume of the tank, and the temperature of the extraction tank rises to 40°C And last for 30 minutes, then transfer the extract into the evaporation tank, reduce the pressure and increase the temperature to vaporize the liquid natural gas, then transfer it to the nat...

Embodiment 2

[0112] Pick the cannabis flowers, leaves and seed shells to remove impurities such as branches and gravel, and then dry them in the shade. Grinding with a pulverizer with dust removal function, the mesh number of the crushing screen is 24 mesh, the powder is sent to the mixer, and the moisture is measured with a simple moisture meter to control the moisture content of the powder to 4-8%, and then sent to the granulator for granulation , the diameter of the prepared particles is 1 cm, and the length is 2 to 4 cm. Get 5 kilograms of the granules prepared in Example 1 and put them into an extraction bag, place them in a 29L extraction tank, inject liquid butane after vacuuming until the solid particles are covered, but not exceed 4 / 5 of the total volume of the tank, the temperature of the extraction tank Raise to 35-40°C and maintain for 20 minutes, then transfer the extract to an evaporation tank, reduce pressure and increase temperature to vaporize the butane, then transfer it ...

Embodiment 3

[0114] Take 5 kilograms of the granules prepared in Example 2 and put them into an extraction bag, place them in a 29L extraction tank, inject liquid butane after vacuuming until the solid particles are covered, but not exceed 4 / 5 of the total volume of the tank, and the extraction tank The temperature is raised to 35-40°C and maintained for 30 minutes, then the extract is transferred to an evaporation tank, the butane is vaporized by increasing the pressure under reduced pressure and then transferred to a butane storage tank through a compressor, and the unvaporized extract is collected. Extracted twice, samples were analyzed by HPLC, and the extraction rate of CBD was calculated according to the peak area.

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PUM

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Abstract

The invention discloses a method of extracting high-purity cannabidiol from industrial hemp. The method includes: pretreatment of raw materials, subcritical extraction, winterization, thermal treatment, short-course molecular distillation and crystallization refining. THC content in CBD prepared by the method meets related legal provisions, CBD content is greater than 98.0%, purity is up to higherthan 99.8%, individual impurity is lower than 0.1%, total impurity is lower than 0.2%, and THC is absent. Compared with existing extraction methods, the method has the advantages of being efficient,energy-saving, environment-friendly and high in product purity.

Description

technical field [0001] The invention belongs to the technical field of medicine, in particular to a method for extracting and purifying cannabidiol from industrial hemp flower leaves and hemp seed shells. [0002] technical background [0003] Industrial hemp (Cananbis Sativa L.), also known as hemp, hemp, jute, is a kind of annual herb, belongs to the family Cannabis, the genus Cannabis. Cannabis cultivation has a long history and has been closely related to human life for a long time. It not only provides fiber and oil for human beings, but also makes great contributions to human health. Archaeologists have discovered 2,700-year-old cannabis resin in a cave in Turpan, Xinjiang, China, the oldest evidence of human cannabis use to date. [0004] The main active ingredient in cannabis is cannabinoids, which are further divided into psychoactive phenolics such as tetrahydrocannabinol (THC) and non-psychoactive phenolics such as cannabidiol (CBD) . At present, the medicines d...

Claims

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Application Information

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IPC IPC(8): C07C39/23C07C37/68C07C37/72C07C37/84C07C37/74
CPCC07C37/68C07C37/72C07C37/84C07C37/74C07C39/23B01D11/0203B01D9/0013B01D11/0288
Inventor 吴平
Owner 吴平
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