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Method for supercritical extraction of cannabidiol

A cannabidiol and supercritical technology, applied in chemical instruments and methods, preparation of organic compounds, production of bulk chemicals, etc., can solve problems such as consumption of organic solvents, environmental pollution, and increased extraction costs, and achieve low price and high purity The effect of high and low extraction cost

Inactive Publication Date: 2019-09-20
云南华方健康管理股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing CBD by supercritical extraction, which solves the problems that the existing industrial technology uses solution extraction method to extract CBD, consumes a large amount of organic solvent, increases extraction cost and pollutes the environment

Method used

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the described specific embodiments are only used to explain the present invention, not to limit the present invention.

[0026] The method for utilizing supercritical extraction of cannabidiol described in the present invention comprises the following steps:

[0027] (1) Pretreatment: Dry the flowers and leaves of cannabis at 98-100°C to obtain raw material A with a moisture content of less than 4%;

[0028] (2) Pulverization: pulverize the raw material A to 50-100 mesh to obtain powder B;

[0029] (3) Drying: drying the powder B at 98-100°C to obtain a powder C with a moisture content of less than 4%;

[0030] (4) Extraction: performing supercritical extraction on the powder C, adding an entrainer during extraction, and obtaining the extra...

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Abstract

The invention discloses a method for supercritical extraction of cannabidiol (CBD). The method includes the steps of: pretreatment: drying the flowers and leaves of cannabis sativa at 98-100DEG C to obtain a raw material A with a moisture content of less than 4%; crushing: crushing the raw material A to 50-100 meshes, thus obtaining powder B; drying: drying the powder B at 98-100DEG C to obtain powder C with a moisture content of less than 4%; extraction: performing supercritical extraction on the powder C, and adding an entrainer for extraction, thus obtaining extracted liquid D1 and residue E, and subjecting the residue E to secondary supercritical extraction, thus obtaining the extracted liquid D2; and separation: combining the extracted liquid D1 and D2, adding an appropriate amount of drug and mixing the substances evenly, performing freezing filtration, and recovering the solvent from the filtrate, thus obtaining total CBD. The method provided by the invention utilizes supercritical extraction of CBD from cannabis sativa, the obtained CBD has higher purity, higher extraction rate, and faster extraction speed; the used carbon dioxide is low in price, and can be re-collected for reutilization, thus greatly reducing the extraction cost.

Description

technical field [0001] The invention relates to the field of natural substance extraction, in particular to a method for preparing and extracting CBD by supercritical extraction. Background technique [0002] marijuana( Cannabis sativa L.), also known as hemp or thread hemp, is a plant of the family Moraceae and the genus Cannabis, an annual erect herb. Tetrahydrocannabinol (THC) is an addictive ingredient in marijuana, and its use and circulation are strictly restricted in various countries. According to the content of THC in marijuana, marijuana is usually divided into two categories: industrial hemp and drug marijuana. The THC content in industrial hemp does not exceed 0.3% (according to the definition method recognized by various countries), which has no drug utilization value; while the THC content in the leaves and flowers of drug cannabis is relatively high, which is highly toxic cannabis. Cannabis contains more than 100 terpene phenols, of which cannabidiol (CBD)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C39/23C07C37/68
CPCC07C37/68C07C39/23Y02P20/54
Inventor 黄海彬
Owner 云南华方健康管理股份有限公司