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Preparation method for purifying cannabis sativa seed oil from cannabis sativa leaves

A technology of hemp oil and hemp leaves, applied in the direction of fat oil/fat refining, fat oil/fat production, fat production, etc.

Pending Publication Date: 2020-11-03
黑龙江纳贝斯抗冠素生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a single extraction and separation method is often difficult to ensure that no other compounds with similar structures and harmful to the human body such as THC remain in CBD. Therefore, a combination of multiple extraction and purification methods is invented, which is low-cost, high-efficiency and suitable for large-scale production of CBD. method is particularly important

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: a kind of method adopting supercritical carbon dioxide extraction and coupling with molecular distillation technology to obtain hemp oil, its steps are as follows:

[0015] (1) 1000g of cannabis leaves are dried and crushed to 40 mesh, extracted with supercritical carbon dioxide, extraction pressure 10Mpa, at 40°C, time 4h, CO 2 The flow rate is 1L / h, recovering CO 2 , to obtain crude cannabis oil;

[0016] (2) With a wiped-film molecular still, adopt two-stage separation, the first-stage distillation pressure is 3 Pa, distill at 1ml / min feed rate, wiped-film rotating speed 200r / min, and the distillation temperature is 90°C;

[0017] (3) Secondary distillation pressure 8 Pa, distillation at 1.2ml / min feed rate, 250r / min scraping film speed, distillation temperature 100°C, remove the peculiar smell of essential oil, further purify, and collect hemp oil;

[0018] (4) Using GC-MS analysis, the relative content is 75.3%;

Embodiment example 2

[0019] Implementation Case 2: A method for obtaining hemp oil by supercritical carbon dioxide extraction coupled with molecular distillation technology, the steps are as follows:

[0020] (1) 1000g of cannabis leaves are dried and crushed to 40 mesh, extracted with supercritical carbon dioxide, at 45°C, extraction pressure 12Mpa, time 5h, CO 2 The flow rate is 1.5L / h, recovering CO 2 , to obtain crude cannabis oil;

[0021] (2) With a wiped-film molecular still, adopt two-stage separation, the first-stage distillation pressure is 5 Pa, distill at a feed rate of 1.2ml / min, a wiped-film rotating speed of 280r / min, and the distillation temperature is 95°C;

[0022] (3) Secondary distillation pressure 9 Pa, distillation at 1.5ml / min feed rate, 300r / min speed of scraping film, distillation temperature is 105°C, remove the peculiar smell of essential oil, further purify, and collect hemp oil;

[0023] (4) Using GC-MS analysis, the relative content is 73.8%;

Embodiment example 3

[0024] Implementation Case 3: A method for obtaining hemp oil by supercritical carbon dioxide extraction coupled with molecular distillation technology, the steps are as follows:

[0025] (1) 1000g of cannabis leaves are dried and crushed to 60 mesh, extracted with supercritical carbon dioxide, at 45°C, extraction pressure 15Mpa, time 6h, CO 2 The flow rate is 2L / h, recovering CO 2 , to obtain crude cannabis oil;

[0026] (2) With a wiped-film molecular still, adopt two-stage separation, the first-stage distillation pressure is 6 Pa, distill at a feed rate of 1.5ml / min, a wiped-film rotating speed of 300r / min, and the distillation temperature is 95°C;

[0027] (3) Secondary distillation pressure 10 Pa, distillation at 2.0ml / min feed rate, 360r / min scraping film rotation speed, distillation temperature is 100°C, remove the peculiar smell of essential oil, further purify, and collect hemp oil;

[0028] (4) Using GC-MS analysis, the relative content is 77.4%.

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Abstract

The invention belongs to the technical field of industrial cannabis sativa leaf processing, and has the advantages that: 1, by means of the supercritical CO2 extraction technology, the extraction process is systematically closed, the damage of micromolecular volatile oil is avoided, the whole cannabis sativa oil extraction is carried out under the condition close to room temperature, and the activity loss is extremely low; 2, the molecular distillation technology is used for purifying the cannabis sativa seed oil, the operation temperature is far lower than the boiling point temperature of a substance under normal pressure, the heating time is very short, the substance is not damaged, and the separation and purification degree and the product yield of the cannabis sativa seed oil are high;according to the method, the extraction time is greatly shortened, the extraction speed is increased, meanwhile, the purification effect is obvious, the content of effective components is high, and the relative content of the obtained cannabis sativa seed oil reaches 77.4%.

Description

Technical field: [0001] The invention belongs to the technical field of processing industrial hemp leaves, and in particular relates to a preparation method of hemp oil. Background technique: [0002] Industrial hemp is called hemp in my country, which is an annual herb of the genus Cannabis in the family Cannabinaceae. Industrial hemp refers to hemp with a THC content of less than 0.3%. The legally grown industrial hemp is a variety with low toxic content. These industrial hemp (THC<0.3%) are considered to have no drug use value, but The whole body is still a treasure, and its applications include at least textiles, papermaking, food, medicine, hygiene, daily chemicals, leather, automobiles, construction, decoration, packaging and other fields. It is a classic raw material for production. [0003] Cannabidiol (CBD) is an important non-psychoactive substance in hemp. It can not only antagonize the hallucinogenic effect of THC, but also has anti-oxidation, anti-tumor, ant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/10C11B1/04C11B3/12
CPCC11B1/04C11B1/104C11B3/12
Inventor 姚德坤万莉姚德利
Owner 黑龙江纳贝斯抗冠素生物科技有限公司
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