CN113801727A - Industrial method for preparing high-quality industrial hemp oil - Google Patents
Industrial method for preparing high-quality industrial hemp oil Download PDFInfo
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- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229930003827 cannabinoid Natural products 0.000 description 2
- 239000003557 cannabinoid Substances 0.000 description 2
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- REOZWEGFPHTFEI-JKSUJKDBSA-N Cannabidivarin Chemical compound OC1=CC(CCC)=CC(O)=C1[C@H]1[C@H](C(C)=C)CCC(C)=C1 REOZWEGFPHTFEI-JKSUJKDBSA-N 0.000 description 1
- VBGLYOIFKLUMQG-UHFFFAOYSA-N Cannabinol Chemical compound C1=C(C)C=C2C3=C(O)C=C(CCCCC)C=C3OC(C)(C)C2=C1 VBGLYOIFKLUMQG-UHFFFAOYSA-N 0.000 description 1
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- REOZWEGFPHTFEI-UHFFFAOYSA-N cannabidivarine Natural products OC1=CC(CCC)=CC(O)=C1C1C(C(C)=C)CCC(C)=C1 REOZWEGFPHTFEI-UHFFFAOYSA-N 0.000 description 1
- QXACEHWTBCFNSA-SFQUDFHCSA-N cannabigerol Chemical compound CCCCCC1=CC(O)=C(C\C=C(/C)CCC=C(C)C)C(O)=C1 QXACEHWTBCFNSA-SFQUDFHCSA-N 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B1/00—Production of fats or fatty oils from raw materials
- C11B1/02—Pretreatment
- C11B1/04—Pretreatment of vegetable raw material
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B1/00—Production of fats or fatty oils from raw materials
- C11B1/10—Production of fats or fatty oils from raw materials by extracting
- C11B1/104—Production of fats or fatty oils from raw materials by extracting using super critical gases or vapours
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B1/00—Production of fats or fatty oils from raw materials
- C11B1/10—Production of fats or fatty oils from raw materials by extracting
- C11B1/108—Production of fats or fatty oils from raw materials by extracting after-treatment, e.g. of miscellae
Abstract
The invention discloses an industrialized method for preparing high-quality industrial hemp oil, which comprises the steps of crushing and drying hemp raw materials, extracting by adopting a supercritical carbon dioxide method, adding active carbon and hemp flower and leaf powder into an extraction kettle in the extraction process, and obtaining the high-quality hemp oil by utilizing the dissolubility of the supercritical carbon dioxide to the hemp oil and the adsorbability of the active carbon to impurities such as pigment in the hemp oil. The invention combines the supercritical extraction and the decoloration adsorption, has simple process, ensures that the industrial hemp oil has the purity of more than 60 percent, has good appearance quality and no solvent residue, and can realize the industrialized large-scale production.
Description
Technical Field
The invention relates to the technical field of industrial hemp extraction, in particular to an industrial method for preparing industrial hemp oil containing cannabidiol.
Background
Cannabis sativa, the scientific name Cannabis sativa l., is an annual herbaceous plant of the Cannabis genus of the cannabinaceae family, a hermaphrodite plant, and a hermaphrodite species type also formed under artificial intervention. The hemp has been planted for more than 5000-6000 years in China, and is one of the earliest crops. The hemp plant contains Tetrahydrocannabinol (THC), one of the drug plants, which is an active ingredient causing hallucinogenic addiction. The cannabis sativa (Industrial Hemp) or Hemp at the top of the female strain in the flowering period of the cannabis sativa with the dry weight content of the active ingredient THC of less than 0.3 percent is internationally called as the cannabis sativa (Industrial Hemp), the cannabis sativa (marijuana & hashish) with the active ingredient THC of more than 0.3 percent is called as the medicinal and narcotic cannabis sativa (marijuana & hashish), and the varieties of the cannabis sativa with w (THC) <0.3 percent are regulated in a legal form as the types of Industrial cannabis sativa varieties allowed to be planted.
Industrial hemp plants contain over 400 chemical species, among which over 60 cannabinoids (cannabinoids). The phenols are mainly Tetrahydrocannabinol (THC), Cannabidiol (CBD), Cannabinol (CBN), Cannabigerol (CBG) and cannabicycloterpene phenol (CBC), and their carboxylic acids and isomers. Wherein the content of the first three is more than 90% of the phenolic substance. Cannabidiol (CBD) is a non-toxic, non-addictive active substance in industrial cannabis. Has anti-spasm, anti-anxiety, and anti-inflammatory effects. The hemp oil is a mixture extracted from hemp flowers and leaves, and is rich in CBD, CBDV, THC and other components, and can be further purified and separated to obtain products with higher CBD purity, such as whole-spectrum oil, broad-spectrum oil, CBD crystals and the like.
At present, the main industrial production method for extracting the hemp oil by adopting industrial hemp flowers and leaves is organic solvent extraction and supercritical carbon dioxide extraction; the separation and purification method of CBD in hemp oil mainly comprises molecular distillation and resin adsorption method (industrial chromatographic column).
For example, patent application publication No. CN107382672A discloses a method for extracting cannabidiol using supercritical carbon dioxide, comprising: carrying out supercritical carbon dioxide extraction after pretreating the raw materials, carrying out throttling expansion on liquid obtained after extraction to resolve cannabidiol, wherein the extraction rate of the cannabidiol can reach 90% at most, and the purity of the cannabidiol is more than 20%; patent applications CN105505565A, US20070141017a1 and the like all describe methods for extracting hemp oil by supercritical carbon dioxide extraction technology.
Furthermore, the prior art describes other supercritical methods for extracting cannabidiol or cannabis oil, such as: the patent application with the publication number of CN110734359A discloses a method for extracting and purifying cannabidiol, which comprises the steps of drying and crushing cannabis flowers, leaves or seed coats, extracting by a supercritical argon extraction method, performing primary separation by a molecular distillation method, and finally performing separation and purification by an argon supercritical fluid chromatography method to obtain high-purity cannabidiol; patent application with publication number CN110684589A discloses a method for extracting and purifying cannabis oil, comprising drying cannabis flowers, leaves or seed coats, pulverizing, extracting by supercritical argon extraction, performing preliminary separation by molecular distillation, and performing separation and purification by argon supercritical fluid chromatography to obtain high-purity cannabis oil.
However, in the above methods, a process of adding the raw material and the activated carbon into the reaction vessel at the time of supercritical extraction is not adopted.
Usually, the decolorization step of activated carbon and the supercritical extraction step are carried out separately, and the decolorization step is carried out after extraction before and after extraction, for example, patent application with publication number CN110951539A describes a vegetable oil decolorization method, specifically, activated carbon particles are prepared and added into vegetable oil, and fully stirred for 1-4 hours at a stirring speed of 100-120 r/min and a stirring temperature of 70-80 ℃; separating the vegetable oil from the activated carbon, or obtaining the decolored vegetable oil finished product.
The invention innovatively and simultaneously carries out the supercritical extraction and the decoloration, not only simplifies the process steps, but also obtains the industrial hemp oil product with higher quality, the purity of the industrial hemp oil obtained by the extraction of the method can reach more than 60 percent (the purity refers to the content of CBD in the hemp oil), and the product has good appearance quality and no solvent residue, and meets the requirement of industrial large-scale production while improving the product quality.
Disclosure of Invention
In order to solve the problem that the industrial and large-scale production cannot be realized due to complicated operation when the supercritical extraction method is adopted to extract the hemp oil in the prior art, the invention particularly provides an industrial method for preparing the high-quality industrial hemp oil, which is simple, convenient and easy to operate. The specific implementation content comprises the following steps:
crushing cannabis sativa flowers and leaves, drying, weighing and adding active carbon according to a certain proportion;
adding the hemp flower leaf powder and active carbon into an extraction kettle, introducing carbon dioxide gas, and controlling the temperature and pressure in the extraction kettle to perform supercritical carbon dioxide extraction;
and step three, performing analysis after supercritical carbon dioxide extraction, and obtaining a product after analysis, namely the industrial hemp oil.
In the first step, the hemp flowers and leaves used as raw materials are dried hemp flowers and leaves; before the crushing step, a selecting step is also included, namely foreign matters such as stones, weeds, mildews and the like in the hemp flowers are selected.
In the first step, any one of the existing crushing methods can be adopted for crushing, the number of the crushing meshes is 10-60 meshes, and the hemp flowers and the hemp leaves are preferably crushed by a hammer crusher until the transmittance of 20 meshes is more than 60%; the drying temperature is 100-; and cooling the raw materials to room temperature for later use after drying.
In the first step, the mass ratio of the dried raw materials to the amount of the activated carbon is 100: 0.05-1, preferably 100: 0.1-1.
In the supercritical extraction process in the second step, the extraction temperature is 30-60 ℃, the pressure in the supercritical extraction process is 10-40Mpa, the flow rate of carbon dioxide is 200-600kg/h, and the extraction time is 1-5 h; preferably, the extraction temperature is 40-50 ℃, the pressure of the supercritical extraction process is 20-30Mpa, the flow rate of carbon dioxide is 300-500kg/h, and the extraction time is 2-3 h.
In the resolving step in the third step, the resolving temperature of the separation kettle is 45-70 ℃, and the pressure is 4-10 Mpa; preferably, the temperature for analysis is 55 to 60 ℃ and the pressure is 5.5 to 6.5 MPa.
Still further, the present application provides an industrial method for preparing high quality industrial hemp oil, characterized by comprising the steps of:
crushing, drying and weighing cannabis sativa flowers and leaves, wherein the mass ratio of the dried raw materials to the active carbon is 100: adding active carbon in a ratio of 0.05-1;
step two, adding the hemp flower leaf powder and the active carbon into an extraction kettle, introducing carbon dioxide gas, and controlling the temperature and the pressure in the extraction kettle to perform supercritical carbon dioxide extraction, wherein the extraction temperature is 30-60 ℃, the pressure is 10-40Mpa, the carbon dioxide flow is 200-600kg/h, and the extraction time is 1-5 h;
and step three, performing resolution after supercritical carbon dioxide extraction, wherein the resolution temperature of the separation kettle is 45-70 ℃, and the pressure is 4-10Mpa, so as to obtain a product obtained after resolution, namely the industrial hemp oil.
Further, the present application also provides an industrial method for preparing high quality industrial hemp oil, which is characterized by comprising the following steps:
crushing, drying and weighing cannabis sativa flowers and leaves, wherein the mass ratio of the dried raw materials to the active carbon is 100: adding active carbon in a ratio of 0.1-1;
step two, adding the hemp flower leaf powder and the active carbon into an extraction kettle, introducing carbon dioxide gas, and controlling the temperature and the pressure in the extraction kettle to perform supercritical carbon dioxide extraction, wherein the extraction temperature is 40-50 ℃, the pressure is 20-30Mpa, the carbon dioxide flow is 300-one tea 500kg/h, and the extraction time is 2-3 h;
and step three, carrying out resolution after supercritical carbon dioxide extraction, wherein the resolution temperature of the separation kettle is 55-60 ℃, and the pressure is 5.5-6.5MPa, so as to obtain a product obtained after resolution, namely the industrial hemp oil.
The method can enable carbon dioxide in a supercritical state to be fully contacted with the hemp flower and leaf powder and the active carbon, and dissolving hemp oil in a supercritical carbon dioxide fluid; after the supercritical extraction is finished, the carbon dioxide is separated from the extract in a gas form, no residue is caused, and the decoloring step is finished while the extraction is finished.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to be limiting in any way, and any modifications or alterations based on the teachings of the present invention are intended to fall within the scope of the present invention.
Example 1
Step one, hemp leaves are crushed to 20 meshes and heated and dried for 1h at the temperature of 130 ℃.
Step two, weighing 180g of hemp flowers and leaves treated in the step one, adding 1g of activated carbon, fully and uniformly stirring, and adding into a supercritical extraction kettle.
And step three, filling carbon dioxide into an extraction kettle for extraction, wherein the temperature is 40 ℃, the pressure is 20Mpa, the flow rate of the carbon dioxide is 400kg/h, and the full extraction is carried out for 2.5h, so as to obtain 10.8g of industrial hemp oil.
Through determination, the purity of the cannabidiol is 61.5%, the color and the quality of the cannabis oil are good, and the L value is more than or equal to 95, the A value is more than or equal to-1, and the B value is less than or equal to 9 through detection of a color difference meter.
Example 2
Step one, hemp leaves are crushed to 20 meshes and heated and dried for 1h at the temperature of 130 ℃.
Step two, weighing 500g of hemp flowers and leaves treated in the step one, adding 4g of activated carbon, fully and uniformly stirring, and adding into a supercritical extraction kettle.
And step three, filling carbon dioxide into an extraction kettle for extraction, wherein the temperature is 50 ℃, the pressure is 25Mpa, the flow rate of the carbon dioxide is 450kg/h, and the full extraction is carried out for 2h, so as to obtain 30.5g of industrial hemp oil.
Through determination, the purity of the cannabidiol is 61.0%, the color and the quality of the cannabis oil are good, and the L value is more than or equal to 95, the A value is more than or equal to-1, and the B value is less than or equal to 9 through detection of a color difference meter.
Example 3
Step one, hemp leaves are crushed to 20 meshes and heated and dried for 1h at the temperature of 130 ℃.
Step two, weighing 1000g of hemp flowers and leaves treated in the step one, adding 10g of activated carbon, fully and uniformly stirring, and adding into a supercritical extraction kettle.
And step three, filling the rest carbon dioxide into an extraction kettle for extraction, wherein the temperature is 50 ℃, the pressure is 30Mpa, the flow rate of the carbon dioxide is 500kg/h, and the full extraction is carried out for 3h, so as to obtain 62.0g of industrial hemp oil.
Through determination, the purity of the cannabidiol is 60.1%, the color and the quality of the cannabis oil are good, and the L value is more than or equal to 95, the A value is more than or equal to-1, and the B value is less than or equal to 9 through detection of a color difference meter.
The detection method comprises the following steps:
1. the color difference value detection method comprises the following steps: 1g of a test sample was weighed, diluted 100 times with methanol (1 g: 100mL), dissolved with ultrasound, and then subjected to color difference measurement using a full-automatic colorimeter (model: SC-80C).
Remarking: 1. the L value represents the brightness, 100 is white, i.e., the solvent blank value; a represents a red-green value, a positive value represents red, a negative value represents green, and the larger the value is, the darker the corresponding color is; b represents a yellow-blue value, positive values indicate yellow and negative values indicate blue, with larger values being darker in the corresponding color.
2. The cannabidiol purity detection method comprises the following steps: performing detection by high performance liquid chromatography, performing gradient elution on a mixture of mobile phase phosphoric acid aqueous solution and acetonitrile at the flow rate of 1.2 mu L/min, the column temperature of 40 ℃ and the detection wavelength of 220nm, and detecting by an external standard method to obtain the purity of the cannabidiol.
3. The weight yield calculation method comprises the following steps: cannabis oil yield/% ═ cannabis oil weight/cannabis flower leaf weight.
The experimental data of the above examples are shown in table 1:
table 1 example extraction conditions and product parameters
To better illustrate the technical effect of the present invention, two sets of comparative examples were set up to compare the effect of different processes on the quality of the hemp oil product. Comparative examples 1-3 adopt the technology of adding activated carbon for decolorization after supercritical carbon dioxide extraction; comparative examples 4-5 are processes for decolorization without the addition of activated carbon.
Comparative example 1
Step one, hemp leaves are crushed to 20 meshes and heated and dried for 1h at the temperature of 130 ℃.
Step two, weighing 180g of hemp flowers and leaves treated in the step one, and adding the hemp flowers and leaves into a supercritical extraction kettle.
Step three, filling carbon dioxide into an extraction kettle for extraction, fully extracting for 2.5 hours at the temperature of 40 ℃, the pressure of 20Mpa and the flow rate of the carbon dioxide of 400kg/h,
step four, adding 100mL of organic solvent into 11.0g of the extract obtained in the step three for dilution, adding 1g of activated carbon, stirring for 30min, filtering, and concentrating the filtrate to obtain 10.5g of industrial hemp oil.
Through determination, the purity of the cannabidiol is 61.3%, the color and the quality of the cannabis oil are good, and the L value, the A value and the B value are 96.5, 0.42 and 4.3 respectively through detection of a color difference meter.
Comparative example 2
Step one, hemp leaves are crushed to 20 meshes and heated and dried for 1h at the temperature of 130 ℃.
And step two, weighing 500g of hemp flowers and leaves treated in the step one, and adding the hemp flowers and leaves into a supercritical extraction kettle.
Step three, filling carbon dioxide into an extraction kettle for extraction, fully extracting for 2 hours at the temperature of 50 ℃, the pressure of 25Mpa and the carbon dioxide flow rate of 450kg/h,
step four, adding 300mL of organic solvent into 32.4g of the extract obtained in the step three for dilution, adding 4g of activated carbon, stirring for 30min, filtering, and concentrating the filtrate to obtain 31.0g of industrial hemp oil.
Through determination, the purity of the cannabidiol is 60.8%, the color and the quality of the cannabis oil are good, and the L value, the A value and the B value are 96.4, 0.45 and 3.7 respectively through detection of a color difference meter.
Comparative example 3
Step one, hemp leaves are crushed to 20 meshes and heated and dried for 1h at the temperature of 130 ℃.
Step two, weighing 1000g of hemp flowers and leaves treated in the step one, and adding the hemp flowers and leaves into a supercritical extraction kettle.
And step three, filling carbon dioxide into an extraction kettle for extraction, wherein the temperature is 50 ℃, the pressure is 30Mpa, the flow of the carbon dioxide is 500kg/h, and the carbon dioxide is fully extracted for 3 h.
Step four, adding 600mL of organic solvent into 64.3g of extract obtained in the step three for dilution, adding 10g of activated carbon, stirring for 30min, filtering, and concentrating the filtrate to obtain 62.2g of industrial hemp oil.
Through determination, the purity of the cannabidiol is 60.3%, the color and the quality of the cannabis oil are good, and the L value, the A value and the B value are 97.5, 0.50 and 3.7 respectively through detection of a color difference meter.
Comparative example 4
Step one, hemp leaves are crushed to 20 meshes and heated and dried for 1h at the temperature of 130 ℃.
Step two, weighing 180g of hemp flowers and leaves treated in the step one, and adding the hemp flowers and leaves into a supercritical extraction kettle.
And step three, filling carbon dioxide into an extraction kettle for extraction, wherein the temperature is 40 ℃, the pressure is 20Mpa, the flow rate of the carbon dioxide is 400kg/h, and the full extraction is carried out for 2.5h, so as to obtain 11.0g of industrial hemp oil.
Through determination, the purity of the cannabidiol is 58.5%, the color of the cannabis oil is darker, and the detection result of a color difference meter is as follows: l value 82.4, A value-2.3, B value 12.6.
Comparative example 5
Step one, hemp leaves are crushed to 20 meshes and heated and dried for 1h at the temperature of 130 ℃.
Step two, weighing 500g of the hemp flowers and leaves subjected to heating treatment in the step one, and adding the hemp flowers and leaves into a supercritical extraction kettle.
And step three, filling carbon dioxide into an extraction kettle for extraction, wherein the temperature is 50 ℃, the pressure is 25Mpa, the flow rate of the carbon dioxide is 450kg/h, and the full extraction is carried out for 2h, so as to obtain 32.3g of industrial hemp oil.
Through determination, the purity of the cannabidiol is 58.4%, the color of the cannabis oil is darker, and the detection result of a color difference meter is as follows: l value 83.7, A value-2.5, B value 11.9.
Comparative example 6
Step one, hemp leaves are crushed to 20 meshes and heated and dried for 1h at the temperature of 130 ℃.
Step two, weighing 1000g of hemp flowers and leaves treated in the step one, and adding the hemp flowers and leaves into a supercritical extraction kettle.
And step three, filling carbon dioxide into an extraction kettle for extraction, wherein the temperature is 50 ℃, the pressure is 30Mpa, the flow rate of the carbon dioxide is 500kg/h, and the full extraction is carried out for 3h, so as to obtain 64.2g of industrial hemp oil.
Through determination, the purity of the cannabidiol is 58.7%, the color of the cannabis oil is darker, and the detection result of a color difference meter is as follows: l value 82.9, A value-2.7, B value 12.3.
The experimental data of the above comparative example are shown in table 2:
table 2 example extraction conditions and product parameters
It can be seen that the hemp oil has a darker color without being decolorized by using activated carbon, the color quality of the hemp oil product can be effectively improved by using the activated carbon, and the purity (namely the content of CBD) and the yield of the hemp oil can be improved to a certain extent. In addition, the quality of the hemp oil obtained by adding the activated carbon during the supercritical extraction is equivalent to that obtained by adding the activated carbon after the supercritical extraction. However, when activated carbon is used for decolorization after supercritical extraction, a solvent must be used for dissolving the supercritical extraction product, and the step may cause solvent residue to affect the quality of the hemp oil. Therefore, the process of the application has the advantages of improving the quality of the hemp oil, reducing the process steps and the process cost and having outstanding technical effects.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (10)
1. An industrial method for preparing high-quality industrial hemp oil is characterized by comprising the following steps:
crushing cannabis sativa flowers and leaves, drying, weighing and adding active carbon according to a certain proportion;
adding the hemp flower leaf powder and active carbon into an extraction kettle, introducing carbon dioxide gas, and controlling the temperature and pressure in the extraction kettle to perform supercritical carbon dioxide extraction;
and step three, performing analysis after supercritical carbon dioxide extraction, and obtaining a product after analysis, namely the industrial hemp oil.
2. An industrial process for the production of high quality industrial hemp oil according to claim 1, wherein: the mass ratio of the dried raw materials to the using amount of the activated carbon is 100: 0.05-1.
3. An industrial process for the production of high quality industrial hemp oil according to any one of claims 1-2, characterized in that: the mass ratio of the dried raw materials to the amount of the active carbon is 100: 0.1-1.
4. An industrial process for the production of high quality industrial hemp oil according to any one of claims 1 to 3, characterized in that: the supercritical extraction process comprises the steps of extracting at the temperature of 30-60 ℃, extracting at the pressure of 10-40Mpa, extracting at the carbon dioxide flow rate of 200-600kg/h for 1-5 h.
5. An industrial process for the production of high quality industrial hemp oil according to any one of claims 1 to 4 wherein: the supercritical extraction process comprises the steps of extracting at the temperature of 40-50 ℃, extracting at the pressure of 20-30Mpa, extracting at the carbon dioxide flow rate of 300-.
6. An industrial process for the production of high quality industrial hemp oil according to any one of claims 1 to 5, characterized in that: the desorption temperature of the separation kettle is 45-70 ℃, and the pressure is 4-10 Mpa.
7. An industrial process for the production of high quality industrial hemp oil according to any one of claims 1 to 6, characterized in that: the desorption temperature of the separation kettle is 55-60 ℃, and the pressure is 5.5-6.5 MPa.
8. An industrial method for preparing high-quality industrial hemp oil is characterized by comprising the following steps:
step one, crushing, drying and weighing dried marihuana and leaves, wherein the mass ratio of the dried raw materials to the activated carbon is 100: adding active carbon in a ratio of 0.05-1;
step two, adding the hemp flower leaf powder and the active carbon into an extraction kettle, introducing carbon dioxide gas, and controlling the temperature and the pressure in the extraction kettle to perform supercritical carbon dioxide extraction, wherein the extraction temperature is 30-60 ℃, the pressure is 10-40Mpa, the carbon dioxide flow is 200-600kg/h, and the extraction time is 1-5 h;
and step three, performing resolution after supercritical carbon dioxide extraction, wherein the resolution temperature of the separation kettle is 45-70 ℃, and the pressure is 4-10Mpa, so as to obtain a product obtained after resolution, namely the industrial hemp oil.
9. An industrial method for preparing high-quality industrial hemp oil is characterized by comprising the following steps:
step one, crushing, drying and weighing dried marihuana and leaves, wherein the mass ratio of the dried raw materials to the activated carbon is 100: adding active carbon in a ratio of 0.1-1;
step two, adding the hemp flower leaf powder and the active carbon into an extraction kettle, introducing carbon dioxide gas, and controlling the temperature and the pressure in the extraction kettle to perform supercritical carbon dioxide extraction, wherein the extraction temperature is 40-50 ℃, the pressure is 20-30Mpa, the carbon dioxide flow is 300-one tea 500kg/h, and the extraction time is 2-3 h;
and step three, carrying out resolution after supercritical carbon dioxide extraction, wherein the resolution temperature of the separation kettle is 55-60 ℃, and the pressure is 5.5-6.5MPa, so as to obtain a product obtained after resolution, namely the industrial hemp oil.
10. Industrial hemp oil produced by the production method according to any one of claims 1 to 10.
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