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Method for extracting cannabidiol and cannabidiol product thereof

A cannabidiol extraction technology, applied in chemical instruments and methods, bulk chemical production, preparation of organic compounds, etc., can solve problems affecting the purity and quality of cannabidiol

Inactive Publication Date: 2017-11-14
YUNNAN HEMPSON BIO-TECH CO LTD
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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 extracting cannabidiol and cannabidiol, which solves the problem that there are some small particles of impurities in cannabidiol that affect the purity and quality of cannabidiol when using the prior art to extract cannabidiol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for extracting cannabidiol, comprising:

[0035] Pretreatment: drying the flowers and leaves of cannabis at 105 degrees Celsius for 0.5 hours to obtain raw material A with a moisture content of 7%;

[0036] Pulverization: Pulverize raw material A to 50 mesh to obtain powder B;

[0037] Drying: Dry powder B at 105 degrees Celsius for 1 hour to obtain powder C with a moisture content of less than 5%;

[0038] Extraction: Carry out supercritical carbon dioxide extraction to powder C, the extraction temperature is 20 degrees Celsius, the pressure is 5MPa, the extraction time is 1 hour, the flow rate of carbon dioxide is 500 kg / hour, also added entrainer ethyl acetate during extraction, entrainer The weight ratio to powder C is 0.3:100; after extraction, liquid D and residue E are obtained, and residue E is subjected to secondary extraction at a temperature of 20 degrees Celsius and a pressure of 5 MPa. The extraction time is 1 hour and the flow rate of carbon diox...

Embodiment 2

[0044] A method for extracting cannabidiol, comprising:

[0045] Pretreatment: drying the flowers and leaves of cannabis at 120 degrees Celsius for 4 hours to obtain raw material A with a moisture content of less than 7%;

[0046] Pulverization: Pulverize raw material A to 100 mesh to obtain powder B;

[0047] Drying: Dry powder B at 120 degrees Celsius for 0.5 hours to obtain powder C with a moisture content of less than 5%;

[0048] Extraction: Carry out supercritical carbon dioxide extraction to powder C, the temperature of extraction is 50 degrees centigrade, the pressure is 30MPa, the extraction time is 5 hours, the flow rate of carbon dioxide is 850 kg / hour, also added entrainer solvent gasoline during extraction, entrainer and The weight ratio of powder C is 1.0:100; after extraction, liquid D and residue E are obtained. The residue E is subjected to secondary extraction at a temperature of 50 degrees Celsius and a pressure of 30 MPa. The extraction time is 5.5 hours a...

Embodiment 3

[0054] A method for extracting cannabidiol, comprising:

[0055] Pretreatment: drying the flowers and leaves of cannabis at 112 degrees Celsius for 2 hours to obtain raw material A with a moisture content of 6%;

[0056] Pulverization: Pulverize raw material A to 75 mesh to obtain powder B;

[0057] Drying: Dry powder B at 109 degrees Celsius for 42 minutes to obtain powder C with a moisture content of less than 5%;

[0058] Extraction: Carry out supercritical carbon dioxide extraction to powder C, the temperature of extraction is 35 degrees Celsius, the pressure is 20MPa, the extraction time is 3 hours, the flow rate of carbon dioxide is 600 kg / hour, also added entrainer sherwood oil during extraction, entrainer and The weight ratio of powder C is 0.7:100; after extraction, liquid D and residue E are obtained. The residue E is subjected to secondary extraction at a temperature of 35 degrees Celsius and a pressure of 20 MPa. The extraction time is 3 hours and the flow rate of...

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Abstract

The invention discloses a method for extracting cannabidiol by utilizing supercritical carbon dioxide. The method comprises the following steps: pretreatment: drying flowers and leaves of cannabis at the temperature of 105-120 DEG C for 0.5-4 hours to obtain a material A with the water content of less than 7%; crushing: crushing the material A to 50-100 meshes to obtain powder B; extraction: carrying out supercritical carbon-dioxide extraction on powder C, and after extraction, obtaining liquid D and residue E; separation: by throttling expansion for the liquid D to resolve the cannabidiol, recovering a solvent F; and filtration: adopting an ultramicro filtration membrane with the cut-off molecular weight of 80-120 KD to filter separated cannabidiol. The method disclosed by the invention has the advantages that hemp seed oil in the cannabis is extracted by using the supercritical carbon dioxide, the highest extraction rate of the cannabidiol can reach 90% and the purity of the cannabidiol is more than 20%.

Description

technical field [0001] The invention relates to the field of substance extraction, in particular to an extraction method of cannabidiol and a cannabidiol product thereof. Background technique [0002] marijuana( Cannabis sativa L.) Also known as hemp or thread hemp, it is a plant of the genus Moraceae and Cannabis, an annual erect herb, 1-3 meters high. Cannabidiol (CBD) contained in cannabis is a phenolic compound that has not been isolated from other animals and plants. Cannabidiol (CBD) is a non-addictive component and has high medicinal value. Studies have shown that if cannabidiol is used reasonably in medicine, it will have antiepileptic, antipsychotic, antidepressant, pain relief, relieve nausea caused by cancer chemotherapy, and treat asthma. In recent years, scientists have also discovered that cannabidiol (CBD) is a powerful antioxidant, which can block the adverse effects of certain drugs on human nerves, and has a series of physiological activities such as blo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/68C07C39/23
CPCC07C37/004C07C39/23Y02P20/54
Inventor 项伟刘绍兴顾文云李泳霖李铖
Owner YUNNAN HEMPSON BIO-TECH CO LTD
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