Method for extracting and purifying broad-spectrum hemp oil from hemp

A technology of hemp oil and hemp, which is applied in the direction of fat oil/fat production, fat oil/fat refining, fat production, etc. It can solve the problems of low extraction rate, large loss of solvent recovery, and high cost

Pending Publication Date: 2020-10-23
ZHEJIANG SHUANGZI INTELLIGENT EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, Chinese patent 201410574240.2 mainly adopts extraction and immersion tank extraction, rotary evaporator evaporation, centrifugal filtration, rising film concentration, concentrated ratio and then enters a pressurized silica gel column, and the eluent is evaporated and concentrated to obtain industrial hemp essential oil. Although crude broad-spectrum oil can be extracted, But the extraction rate is not high, and the loss of solvent recovery is large, and the cost is high

Method used

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  • Method for extracting and purifying broad-spectrum hemp oil from hemp
  • Method for extracting and purifying broad-spectrum hemp oil from hemp
  • Method for extracting and purifying broad-spectrum hemp oil from hemp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Harvest cannabis leaves and flowers, dry them at 80°C until the water content is 5%, and crush the materials to 20 mesh to obtain clean materials for use.

[0051] Weigh 60kg of cannabis powder, feed continuously at a feed rate of 15kg / h, use 8 times the ethanol solution of 60% concentration as the solvent, and feed ethanol solution continuously at 120L / h, the extraction temperature is 20°C, and the extraction time is 30min, the extraction is completed and the crude extract is collected, and the parameters for obtaining the relevant substances of high performance liquid chromatography are shown in figure 1 .

[0052] The obtained crude extract was concentrated in a vacuum low-temperature concentrator at a concentration temperature of 60°C to an extract, and the extract was further heated to 130°C for a decarboxylation reaction for 1 hour to obtain a decarboxylation solution.

[0053] The decarboxylation solution is subjected to short-range molecular distillation, and t...

Embodiment 2

[0058] The cannabis leaves and flowers are harvested, dried at 150°C to a moisture content of 3%, and the materials are crushed to 80 mesh to obtain clean materials for use.

[0059] Weigh 60kg of cannabis powder, feed continuously at a feed rate of 15kg / h, use 4 times the ethanol solution of 95% concentration as the solvent, and feed the ethanol solution continuously at 60L / h, the extraction temperature is 40°C, and the extraction time is 120min, the extraction is completed and the crude extract is collected, and the parameters for obtaining the relevant substances of high performance liquid chromatography are shown in figure 1 .

[0060] The obtained crude extract was concentrated in a vacuum low-temperature concentrator at a concentration temperature of 70°C to the extract, and the extract was further heated to 150°C for a decarboxylation reaction for 2 hours to obtain a decarboxylation solution.

[0061] The decarboxylation solution is subjected to short-range molecular d...

Embodiment 3

[0067] The cannabis leaves and flowers are harvested, dried at 100°C to a water content of 3%, and the materials are crushed to 50 mesh to obtain clean materials for use.

[0068] Weigh 60kg of cannabis powder, feed continuously at a feed rate of 15kg / h, use 20 times the ethanol solution of 65% concentration as the solvent, and feed the ethanol solution continuously at 1200L / h, the extraction temperature is 30°C, and the extraction time is 80min, the extraction is completed and the crude extract is collected, and the parameters for obtaining the relevant substances of high performance liquid chromatography are shown in figure 1 .

[0069] The obtained crude extract was concentrated by a vacuum low-temperature concentrator at a concentration temperature of 65°C to an extract, and the extract was further heated to 140°C for a decarboxylation reaction for 1.5 hours to obtain a decarboxylation solution.

[0070] The decarboxylation solution is subjected to short-range molecular d...

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Abstract

The invention discloses a method for extracting and purifying broad-spectrum hemp oil from hemp, belongs to the field of chemical extraction and purification. The method comprises the following stepsof: harvesting, drying and crushing hemp flowers and leaves to obtain a clean material for later use; carrying out continuous countercurrent extraction on the clean material by adopting an ethanol solution with a concentration of 60-95% to obtain a crude extract; concentrating the crude extract under reduced pressure to obtain an extract, heating the extract to 130-150 DEG C, and carrying out a decarboxylation reaction for 1-2 hours to obtain a decarboxylated solution; carrying out short-path molecular distillation on the decarboxylated solution, and collecting distillation products with different boiling points to obtain crude oil; winterizing the crude oil, and carrying out filter pressing to remove wax so as to obtain filtrate; carrying out column chromatographic purification on the filtrate by using an ethanol solution to obtain a chromatographic solution; and concentrating the chromatographic solution to an oil form so as to obtain the broad-spectrum hemp oil. The method has the advantages that an extraction rate is high, the solvent can be recycled, the total amount of cannabinoid is high, and tetrahydrocannabinol (THC) is hardly contained.

Description

technical field [0001] The invention belongs to the field of chemical extraction and purification, in particular to a method for extracting and purifying broad-spectrum cannabis oil from cannabis. Background technique [0002] Cannabis scientific name Cannabis, Cannabis genus, also known as hemp, hemp, hemp, mountain silk seedling, jute, has important agricultural and medicinal value. Marijuana contains a toxic component, 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 cannabis, the raw material cannabis for industrial use is referred to as "industrial hemp". The value of hydrocannabinol may be taken directly as a drug, and it can be legally carried out in large-scale cultivation and industrial development and utilization. [0004] Full-spectrum (or broad-spectrum) hemp oil is the extract of hemp flowers and leaves without further pur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/04C11B1/10C11B3/00
CPCC11B1/04C11B1/102C11B3/001
Inventor 罗飞田汉玉郑明辉郑植标叶彬陈稼裕
Owner ZHEJIANG SHUANGZI INTELLIGENT EQUIP CO LTD
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