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Method for extracting CBD (cannabidiol) oil from industrial dried hemp flowers and leaves

A technology of industrial hemp and hemp flower, which is applied in the direction of fat oil/fat production, fat oil/fat refining, fat generation, etc. It can solve the problems of difficult regeneration of silica gel, high cost, high average price, etc., and achieve a large amount of dried flowers and leaves, The effect of reducing consumption and overcoming high production cost

Pending Publication Date: 2019-09-10
昆明萃醍生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The third is that the production capacity is limited. After 8 hours of uninterrupted production through a 1000-liter ultra-supercritical extraction device, it can process up to 3 tons of dried flowers and leaves.
[0004] Most of the existing CBD enrichment processes use chromatographic columns, which need to consume a large amount of flammable, explosive, toxic and carcinogenic organic solvents. The silica gel used in the chromatographic process is difficult to regenerate. The investment in equipment is huge, and the demand for personnel is large, resulting in increased costs.
[0005] From the above analysis, it can be known that the average price of the two current methods of producing industrial hemp CBD is relatively expensive, which limits the use of excellent antiepileptic drugs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] During production, dry the flowers and leaves of industrial hemp at a drying temperature of 60°C. A belt dryer can be used to keep the moisture content below 5%, and then crush and dry the flowers and leaves. The crushing temperature is lower than 70°C, and the crushing particle size is about one millimeter. . Start the reducer, use the chain to drive the material container to rotate clockwise at a speed of 80 minutes per revolution, and feed the material to the material grid at a speed of 300 kg per hour, and install the fresh solvent pump and other circulation pumps in counterclockwise order, at 900 Spray the material at a speed of kilograms per hour. When the fresh spray solvent preheated to 50°C has rotated the material grid for one week, the solvent flows through the material layer, seeps out from the bottom net, and collects, passes through the first solvent The circulation pump is driven into the first spraying position that rotates counterclockwise, and after 6 ...

Embodiment 2

[0021] During production, dry the flowers and leaves of industrial hemp at a drying temperature of 70°C. A disc dryer can be used to keep the moisture content below 6%, and then crush and dry the flowers and leaves. The crushing temperature is lower than 70°C, and the crushing particle size is about one millimeter . Start the reducer, use the chain to drive the material container to rotate clockwise at a speed of 100 minutes per revolution, and feed the material to the material grid at a speed of 400 kg per hour. Spray the material at a speed of kilograms per hour. When the fresh spray solvent preheated to 50°C has rotated the material grid for one week, the solvent flows through the material layer, seeps out from the bottom net, and collects, passes through the first solvent The circulation pump is driven into the first spraying position that rotates counterclockwise, and after 10 cycles of spraying in sequence, the final extract is taken out from the outlet of the extract, a...

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PUM

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Abstract

The invention discloses a method for extracting CBD (cannabidiol) oil from industrial dried hemp flowers and leaves. The method is characterized by comprising the following steps: crushing dried hempflowers and leaves; transferring into material grids of a Rotocel extractor; enabling the material girds to make horizontal circumferential movement under driving of a top motor; at the same time, spraying a solvent, namely n-hexane, petroleum ether, #6 solvent oil, kerosene or benzene, to the material by using a pump; after the solvent penetrates into a material layer, enabling the solvent to ooze out from a material partitioning net at a lower end; pumping out the oozed extract by using an anti-explosion pump; carrying out two-stage filtration; recycling the solvent so as to obtain crude CBDoil; carrying out redissolution by using ethanol; freezing, filtering, and recycling ethanol from the filtrate; carrying out complete depressurized recycling on the ethanol, heating to 120-180 DEG C,and carrying out a vacuum decarboxylic reaction for 20 minutes so as to obtain decarboxylation CBD oil; and pumping the decarboxylation reaction CBD oil into a molecular distillate material tank, andcarrying out CBD enrichment through two-stage molecular distillation. The purity is 80% or greater, and the process has the advantages of being large in processing amount, low in water, power and solvent consumption, low in one-time investment, and the like.

Description

technical field [0001] The invention relates to a method for large-scale extraction of industrial hemp CBD, in particular to a method for extracting CBD oil from dried industrial hemp flowers and leaves. Background technique [0002] Cannabidiol (CBD for short) is the main chemical component in the medicinal plant cannabis, which has pharmacological effects such as anti-spasmodic, anti-anxiety, and anti-epileptic. , kerosene, or solvent gasoline, etc. to obtain. [0003] At present, multifunctional extraction tanks are used for extraction, or supercritical carbon dioxide extraction equipment is used for extraction. The method of extracting with a multifunctional extraction tank is to put the dried flowers and leaves into the extraction tank, add a solvent and then reflux for extraction. The extract is filtered and then purified and concentrated to obtain the product. It is more than 15%, and the processing capacity is limited. A large extraction tank of 10 cubic meters can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/10C11B3/00
CPCC11B1/10C11B1/108C11B3/001
Inventor 张五一金伟铮吕扬效
Owner 昆明萃醍生物科技有限公司
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