Natural essential oil capable of refreshing mind and restoring consciousness and preparation method thereof

Abstract

The invention discloses natural essential oil for refreshing mind and restoring consciousness and a preparation method thereof. The natural essential oil is prepared from the following raw materials in parts by weight: 25-35 parts of artemisia apiacea essential oil, 20-30 parts of rhododendron barbatum essential oil, 15-25 parts of cardamom essential oil, 10-20 parts of pericarpium citri reticulatae essential oil and 10-15 parts of flos chrysanthemi indici essential oil. The natural essential oil disclosed by the invention is completely prepared from natural plant extracts, does not contain any chemical synthesis component, and is safe and free from toxic and side effects. Wherein the artemisia apiacea essential oil strengthens and stimulates the refreshing characteristic; the rhododendron barbatum essential oil stimulates olfactory nerves and adjusts the neural state; the cardamom essential oil can promote brain circulation and improve excitement; the pericarpium citri reticulatae essential oil relieves fatigue and optimizes olfactory experience; the wild chrysanthemum flower essential oil excites central nervous and keeps sober. Various components have a synergistic effect, so that the overall refreshing effect is improved.

Description

Technical Field

[0001] This invention relates to the field of traditional Chinese medicine technology, specifically to a natural essential oil for refreshing the mind and its preparation method. Background Technology

[0002] In today's fast-paced life, people often face various pressures, easily leading to fatigue, lethargy, and other problems that affect work efficiency and quality of life. At such times, products that boost energy are needed to combat fatigue. Currently, there are many energy-boosting products on the market, such as coffee and energy drinks. While they can provide a certain degree of alertness, some products contain stimulants like caffeine, and long-term use may have adverse effects on health. Some existing aromatherapy products claim to have energizing effects, but most use chemically synthesized fragrances, which not only have limited effectiveness but may also pose potential health risks. Plant essential oils, as natural volatile substances, have various physiological and psychological regulatory functions and can be used to make energy-boosting products without causing harm to humans.

[0003] However, existing plant essential oil energizing products either have a single ingredient and are not very effective, or have an unreasonable formula that poses safety risks. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of insignificant effects and safety hazards of existing natural essential oils, and to provide a refreshing natural essential oil and its preparation method.

[0005] To achieve the above objectives, the present invention provides a refreshing and invigorating natural essential oil comprising the following raw materials in parts by weight: 25-35 parts artemisia annua essential oil, 20-30 parts rhododendron essential oil, 15-25 parts cardamom essential oil, 10-20 parts dried tangerine peel essential oil, and 10-15 parts wild chrysanthemum essential oil.

[0006] Optionally, the invigorating natural essential oil comprises the following raw materials in parts by weight: 30 parts artemisia annua essential oil, 25 parts rhododendron essential oil, 20 parts cardamom essential oil, 15 parts dried tangerine peel essential oil, and 12 parts wild chrysanthemum essential oil.

[0007] This invention also provides a method for preparing the above-mentioned refreshing and invigorating natural essential oil, comprising the following steps: S1, Preparation of Rhododendron molle essential oil: After removing impurities from Rhododendron molle flowers, distill under reduced pressure to obtain crude Rhododendron molle extract; filter the crude Rhododendron molle extract to obtain Rhododendron molle essential oil; S2, the rhododendron essential oil is mixed with the artemisia essential oil, cardamom essential oil, tangerine peel essential oil and wild chrysanthemum essential oil to obtain the refreshing natural essential oil.

[0008] Optionally, the vacuum distillation is performed using a water bath with a heating rate of 1℃ / min. The vacuum degree of the vacuum distillation is 0.090-0.095 MPa, and the water bath temperature is 60-70℃.

[0009] Optionally, in step S1, the filtration is performed through an organic filter membrane, which is activated by soaking in ethanol before use.

[0010] Optionally, the artemisia essential oil is obtained by steam distillation, with water as the extraction solvent. The heating method for steam distillation is a stepped heating, first heating to 80°C at 5°C / min and holding for 15 min, and then heating to 100°C at 2°C / min.

[0011] Optionally, the cardamom essential oil is obtained by steam distillation, with the extraction solvent being a 0.1 wt% citric acid solution and the steam distillation temperature being 105℃-110℃.

[0012] Compared with the prior art, the beneficial effects of the present invention are: (1) The refreshing and invigorating natural essential oils of this invention include: artemisia annua essential oil, rhododendron essential oil, cardamom essential oil, dried tangerine peel essential oil, and wild chrysanthemum essential oil. Among them, artemisia annua essential oil and rhododendron essential oil are the main components, and the two have synergistic effects in antibacterial and anti-inflammatory properties and aroma regulation. Artemisia annua essential oil is rich in camphor, 1,8-cineole, and α-pinene. Camphor has antibacterial and anti-inflammatory properties, while 1,8-cineole and α-pinene can invigorate the spirit and improve fatigue. The strong aroma of artemisia annua essential oil also enhances its invigorating properties. Rhododendron essential oil is rich in δ-juniperene, α-pinene, and limonene. δ-juniperene has antibacterial and anti-inflammatory effects, while α-pinene and limonene can invigorate the spirit, relieve anxiety, and enhance attention and concentration. The fresh and sweet aroma of rhododendron essential oil helps relieve fatigue and invigorate the spirit. Using rhododendron and artemisia annua essential oils together can synergistically combat antibacterial and anti-inflammatory effects, purify airborne bacteria, and create a balanced effect of "artemisia annua invigorating + rhododendron soothing," complementing each other in aroma regulation.

[0013] (2) In the preparation of cardamom essential oil in this invention, 0.1 wt% citric acid solution is used as the extraction solvent for steam distillation to promote the release of essential oil components in cardamom seeds and inhibit the growth of microorganisms, thereby ensuring the purity and quality of cardamom essential oil.

[0014] (3) The present invention customizes specific distillation processes and parameters for each plant’s characteristics (such as essential oil composition, temperature sensitivity, cell wall structure, etc.), effectively and highly selectively dissolves the essential oil composition of each plant, and greatly improves the quality of essential oil. Detailed Implementation

[0015] The technical solution of the present invention will be further described below with reference to the embodiments.

[0016] This invention provides a refreshing and invigorating natural essential oil, comprising the following raw materials in parts by weight: 25-35 parts artemisia annua essential oil, 20-30 parts rhododendron essential oil, 15-25 parts cardamom essential oil, 10-20 parts dried tangerine peel essential oil, and 10-15 parts wild chrysanthemum essential oil.

[0017] Among them, Artemisia annua ( Artemisia annua The essential oil is extracted from the whole plant using steam distillation. It is rich in camphor, 1,8-cineole, and α-pinene. Camphor has antibacterial and anti-inflammatory properties, while 1,8-cineole and α-pinene can invigorate the spirit and improve fatigue. Meanwhile, the strong aroma of artemisia essential oil enhances its overall invigorating properties.

[0018] Rhododendron simsii ( Rhododendron anthopogon The essential oil is extracted from the flowers using vacuum distillation. It is rich in substances such as δ-juniperene, α-pinene, and limonene. δ-juniperene has antibacterial and anti-inflammatory effects, while α-pinene and limonene can invigorate the spirit, relieve anxiety, enhance attention and concentration, help clear the mind of distractions, and promote clear and agile thinking. At the same time, the fresh and sweet aroma of rhododendron essential oil helps relieve fatigue and uplift the spirit.

[0019] When combined with artemisia essential oil, rhododendron essential oil can work synergistically to fight bacteria and reduce inflammation, purify the air, and create a balanced effect of "artemisia uplifting + rhododendron soothing" in terms of aroma regulation, complementing each other.

[0020] Cardamom ( I love kravanh Pierre from Gagnep Cardamom essential oil is extracted from seeds using steam distillation. It is rich in components such as eucalyptol, α-pinene, and d-camphene. The unique spicy and cool aroma of cardamom essential oil can stimulate brain nerves, promote blood circulation, improve brain oxygen supply, and invigorate the spirit.

[0021] Dried tangerine peel ( Citrus Reticulata Pericarp The essential oil is extracted from the fruit peel using CO2 supercritical extraction. It is rich in volatile oils such as limonene. Its fresh aroma can stimulate olfactory receptors, transmit nerve signals to the brain and regulate the release of neurotransmitters, thus relieving fatigue. At the same time, its soft aroma can adjust the overall flavor of the formula, enhance olfactory comfort, and indirectly help to relax the mind.

[0022] wild chrysanthemum ( Chrysanthemum indicum L. Essential oils are extracted from flower heads using steam distillation. They are rich in pinene, camphor, and caryophyllene. Their aroma has a certain stimulating effect, which can excite the central nervous system, enhance brain excitation, and keep people alert.

[0023] The technical solution of the present invention will be further described below through specific embodiments. The following embodiments do not constitute a limitation of the present invention.

[0024] Example 1 This embodiment provides a refreshing natural essential oil, comprising the following raw materials in parts by weight: 30 parts artemisia annua essential oil, 25 parts rhododendron essential oil, 20 parts cardamom essential oil, 15 parts dried tangerine peel essential oil, and 12 parts wild chrysanthemum essential oil.

[0025] I. The preparation method of artemisia annua essential oil is as follows: (1) After washing the Artemisia annua, it is dried in stages: first, it is dried in a ventilated environment at 35℃ for 4 hours to quickly remove the moisture on the surface of the Artemisia annua, and then transferred to a low-temperature drying room at 28℃ for 8 hours to avoid the loss of the aroma components of Artemisia annua. After drying, the moisture content of Artemisia annua is stable at 15-20%. If the moisture content is too high, it will prolong the distillation time of Artemisia annua, and if the moisture content is too low, the essential oil components will adhere to the dried fibers and be difficult to release.

[0026] (2) Use a grinder to grind the artemisia annua into artemisia annua particles with a particle size of 0.3mm≤0.5mm. Then soak the artemisia annua particles in water and stir them every 10 minutes to ensure that the artemisia annua and water are in full contact and to avoid local clumping of the artemisia annua particles, which would lead to uneven distillation of the essential oils later.

[0027] The essential oil was extracted using steam distillation to obtain crude artemisia extract. The steam distillation employed a stepped heating method: first, the temperature was increased to 80°C at a rate of 5°C / min and held for 15 minutes to soften the cell walls of artemisia, and then increased to 100°C at a rate of 2°C / min to prevent instantaneous high temperature from damaging the α-pinene structure.

[0028] (3) The above-mentioned crude extract of Artemisia annua contains an upper oil phase and a lower aqueous phase. 0.5 wt% sodium chloride was added to the lower aqueous phase to increase the density of the aqueous phase and accelerate the separation of water and oil. The upper oil phase was collected after standing for 30 minutes.

[0029] (4) Take desiccant anhydrous sodium sulfate, activate the anhydrous sodium sulfate at 120°C for 4 hours in advance, cool it and add it to the collected oil phase liquid (oil phase liquid: anhydrous sodium sulfate = 5:1), and adsorb the residual water in the oil phase liquid at 4°C.

[0030] (5) Filter the mixture of oil phase liquid and anhydrous sodium sulfate, and collect the filtrate as artemisia annua essential oil. The artemisia annua essential oil is qualified when its refractive index is 1.468-1.472.

[0031] II. The preparation method of rhododendron essential oil is as follows: (1) Use stainless steel tweezers to remove impurities from the Rhododendron simsii flowers (remove the calyx and pedicel), then rinse with clean water and let dry. The Rhododendron simsii flowers should be picked between 6 and 8 am, when the petals have a high water content and high essential oil content.

[0032] (2) The essential oil was extracted by vacuum distillation to obtain crude extract of Rhododendron molle (because the essential oil components in Rhododendron molle flowers are highly volatile and Rhododendron molle flowers are sensitive to temperature, the essential oil components can be directly extracted by vacuum distillation at low temperature without the need for steam distillation. Steam distillation requires the addition of an additional extractant, which increases the subsequent separation of the extractant and raises the production cost).

[0033] The above-mentioned vacuum distillation uses a water bath heating method to avoid localized overheating of the rhododendron flowers. The heating rate is 1℃ / min. When the temperature reaches 60-70℃, the vacuum level is kept stable (fluctuation not exceeding 0.002MPa). Samples are taken every 1 hour to test the essential oil content (by gas chromatography). Distillation is stopped when the content is below 0.01%.

[0034] (3) Take an organic filter membrane and soak it in anhydrous ethanol for 30 minutes to activate the pore size of the organic filter membrane. Then filter the above-mentioned crude extract of Rhododendron molle using the organic filter membrane (pressure 0.2 MPa, to improve filtration efficiency), and collect the filtrate as Rhododendron molle essential oil. Gas chromatography analysis showed that the α-pinene content of the Rhododendron molle essential oil in this embodiment can reach 25%, and the limonene content can reach 15%.

[0035] III. The preparation method of cardamom essential oil is as follows: (1) Dry mature cardamom fruits in a well-ventilated environment for 7 days (post-ripening treatment to increase essential oil content), then remove the cardamom fruit shells and retain the cardamom seeds. Dry and pulverize the cardamom seeds with hot air at a temperature of 50℃ and a hot air velocity of 1.5m / s. After drying, the moisture content of the cardamom seeds is stabilized at 8-10%.

[0036] (2) Soak cardamom seeds in a 0.1 wt% citric acid solution to adjust the pH of the solution to 4.5-5.0 to promote the release of essential oil components. Stir continuously during soaking at a speed of 50 r / min. After soaking for 1 hour, check the pH of the solution. If it deviates from 4.5-5.0, add citric acid.

[0037] (3) Place the cardamom seeds and citric acid solution into a distillation jar and use the citric acid solution as the extraction solvent to perform steam distillation to obtain the crude cardamom extract.

[0038] The reason for using a 0.1 wt% citric acid solution for distillation is that it can adjust the pH of the system to 4.5-5.0. This acidic environment helps to disrupt the cell wall structure of cardamom seeds, promoting the release of essential oils. Simultaneously, the citric acid solution can also inhibit microbial growth to a certain extent, ensuring the purity and quality of the essential oil. If water soaking is used, the effects of adjusting pH, promoting essential oil release, and inhibiting microbial growth cannot be achieved, affecting the extraction efficiency and quality of the essential oil.

[0039] The above steam distillation uses a steam jacket heating system with a steam pressure of 0.3 MPa and a temperature of 105-110℃. The mixture is stirred intermittently once during the distillation process to prevent the raw material from settling to the bottom.

[0040] (4) Collect the upper essential oil of the crude cardamom extract and place it in a -5℃ freezer (freezing rate 2℃ / h to avoid uneven wax crystallization caused by rapid freezing). After freezing for 24 hours, use a Buchner funnel to filter and remove the wax components (vacuum degree 0.08MPa). The collected essential oil is cardamom essential oil. The acid value of the collected cardamom essential oil needs to be tested (standard value ≤1.0mg KOH / g). If it exceeds the standard, it needs to be neutralized with 0.1mol / L sodium hydroxide solution (mix in a 1:1 ratio, stir for 30 minutes, let stand for separation and remove the aqueous phase).

[0041] IV. The preparation method of dried tangerine peel essential oil is as follows: (1) Powder and dry the dried tangerine peel. Choose tangerine peel that has been stored for more than 3 years. The longer the aging time, the higher the limonene content. The fineness of the powdered tangerine peel is 20-40 mesh. Vacuum drying is selected for drying the tangerine peel. The moisture content of the dried tangerine peel after drying is ≤5%.

[0042] (2) Extracting essential oils using supercritical CO2 extraction (since the tangerine peel has undergone a long aging process, only supercritical CO2 extraction can fully extract the essential oil components from it). The supercritical extraction apparatus was filled to 60% capacity (18 kg in a 30 L extraction vessel). The material was added in layers (5 kg per layer, separated by absorbent cotton to prevent compaction). Temperature, pressure, and flow rate were recorded every 30 minutes during the extraction process to ensure parameter stability.

[0043] The temperature difference between separation vessel I and separation vessel II of the extraction apparatus is controlled within 5℃ to prevent essential oil components from condensing and clogging the pipes during the separation process. After extraction, the essential oil component content in separation vessel I and separation vessel II is tested separately, and they are mixed evenly only after passing the tests.

[0044] (3) Use nitrogen to dynamically purge the essential oil to remove residual CO2 until CO2 ≤ 0.001%, with a nitrogen flow rate of 5 L / min. The collected essential oil is tangerine peel essential oil. Tangerine peel essential oil should be stored in a brown glass bottle (away from light), with 0.1% vitamin E (antioxidant to extend shelf life) added, and refrigerated at 4℃.

[0045] V. The preparation method of wild chrysanthemum essential oil is as follows: (1) Crush the flower heads of wild chrysanthemums without washing them with water (to avoid water-soluble components such as flavonoids from being mixed in, which would affect the purity of the essential oil). Wild chrysanthemum flower heads should be picked after the first frost, when the essential oil content is highest.

[0046] (2) The essential oil is extracted by steam distillation. The heating method for distillation is intermittent heating of "boiling-stop" to avoid local overheating of wild chrysanthemum, which may cause charring and decomposition and affect the quality and aroma of the essential oil. During the boiling stage, only a slight boil is required (the liquid surface fluctuation is ≤1cm). During the stop stage, the heating device must be turned off and the exhaust valve on the top of the distillation vessel must be opened (to release the pressure inside the vessel and prevent the raw material from overheating). The raw material is stirred after each "boiling-stop" cycle to prevent local charring of the raw material.

[0047] (3) Dilute the distillation product with anhydrous ethanol at a volume ratio of 1:1, mix well, and freeze in a -10℃ freezer for 24 hours to allow the insoluble matter to crystallize fully. Then filter with a sintered glass funnel (pore size G3, 15-40μm), remove the ethanol by rotary evaporation, and collect the essential oil as wild chrysanthemum essential oil.

[0048] Accurately weigh the above essential oils according to their mass ratio, place them in a mixing container, and mix thoroughly to obtain a refreshing and invigorating natural essential oil. Let it stand for 24 hours to allow the components to fully blend, and then proceed with aroma and invigorating function evaluation.

[0049] Example 2 This embodiment provides a refreshing natural essential oil, comprising the following raw materials in parts by weight: 25 parts artemisia annua essential oil, 20 parts rhododendron essential oil, 15 parts cardamom essential oil, 10 parts dried tangerine peel essential oil, and 10 parts wild chrysanthemum essential oil.

[0050] Example 3 This embodiment provides a refreshing natural essential oil, comprising the following raw materials in parts by weight: 35 parts artemisia annua essential oil, 30 parts rhododendron essential oil, 25 parts cardamom essential oil, 20 parts dried tangerine peel essential oil, and 15 parts wild chrysanthemum essential oil.

[0051] Comparative Example 1 The difference between this comparative example and Example 1 is that artemisia oil is replaced with peppermint oil.

[0052] Comparative Example 2 The difference between this comparative example and Example 1 is that the rhododendron essential oil is replaced with tea tree essential oil.

[0053] Comparative Example 3 The difference between this comparative example and Example 1 is that cardamom oil is replaced with cinnamon oil.

[0054] Comparative Example 4 The difference between this comparative example and Example 1 is that the tangerine peel essential oil is replaced with sweet orange essential oil.

[0055] Comparative Example 5 The difference between this comparative example and Example 1 is that wild chrysanthemum essential oil is replaced with eucalyptus essential oil.

[0056] Performance testing 1. Persistence testing Take 2 mL of the natural essential oils from Examples 1-3 and Comparative Examples 1-5 and drop them onto paper, then place them in a ventilated area for 3 hours. After 3 hours, evaluate the paper with the natural essential oils and compare it with the natural essential oils from the same group that were stored in a sealed container to see if the aroma has faded.

[0057] If the aroma becomes noticeably weaker, it indicates that the natural essential oil does not last long.

[0058] 2. Sensory evaluation Thirty healthy volunteers aged 25-35 with normal sense of smell were recruited to evaluate the natural essential oils in Examples 1-3 and Comparative Examples 1-5 using the inhalation method. The invigorating effect and overall aroma of the natural essential oils were scored on a scale of 0-10, with scores closer to 10 indicating better invigorating effect and overall aroma.

[0059] Table 1 Performance test results

[0060] Comparative Examples 1-5 are based on Example 1, with any one of the following ingredients replaced: artemisia annua essential oil, rhododendron essential oil, cardamom essential oil, dried tangerine peel essential oil, and wild chrysanthemum essential oil. According to the comparison of the test results of Example 1 and Comparative Examples 1-5 in Table 1, the essential oils in Comparative Examples 1-4 are not as effective as those in Example 1 in terms of energizing effect. While Comparative Example 5 uses eucalyptus essential oil, which has a good energizing effect, its high eucalyptol content caused some people to experience over-excitement, palpitations, and irritability. Overall, the natural essential oil in Example 1 combines excellent energizing and aromatic properties, making it more suitable for widespread use.

[0061] 3. Energy booster test Forty healthy volunteers aged 25-35 with normal sense of smell participated in the trial between 2-5 pm on weekday afternoons when fatigue is common. The natural essential oil from Example 1 was added to an aromatherapy diffuser and allowed to evaporate, which was then inhaled by each volunteer. Heart rate indicators were measured for each volunteer before inhaling the essential oil, during the 15-minute inhalation, and 15 minutes after the inhalation ended.

[0062] The above heart rate indicators were detected using the LabTech EC-12S real-time ECG monitoring device. The heart rate indicators include the standard deviation of normal RR interval (SDNN), low-frequency power (LF), high-frequency power (HF), total power (TP), and LF / HF, etc.

[0063] The test results are as follows: Table 2 Comparison of heart rate indicators before, during, and after essential oil inhalation for all participants.

[0064] Note: # represents the comparison with before using the Breath of Essential Oil, # P < 0.05, ## P < 0.01, ### P < 0.001; * represents the comparison with during the Breath of Essential Oil process, * P < 0.05, ** P < 0.01, *** P < 0.001.

[0065] In heart rate monitoring, the standard deviation of the normal RR interval (SDNN) and total power (TP) typically reflect autonomic nervous system regulation, low-frequency power (LF) typically reflects sympathetic nervous system activity, high-frequency power (HF) typically reflects vagal nervous system activity, and LF / HF typically reflects the balance between the sympathetic and vagal nervous systems. Table 2 shows that after inhaling the natural essential oil of Example 1, the standard deviation of the normal RR interval (SDNN) increased, reflecting improved autonomic nervous system regulation; low-frequency power (LF) increased, reflecting enhanced sympathetic nervous system activity; and the LF / HF ratio increased, reflecting increased sympathetic nervous system activity relative to the vagus nerve. Total power (TP) significantly increased, reflecting enhanced overall autonomic nervous system activity. Furthermore, the effects continued even after inhalation, and all data were statistically significant. Therefore, the natural essential oil of this invention has a certain effect on enhancing autonomic nervous system activity and regulating autonomic nervous system function, thus providing a refreshing effect.

[0066] In addition to being used with an aromatherapy diffuser, the refreshing and invigorating natural essential oils of this invention can also be used in the following ways: 1. Massage: Dilute the natural essential oil of this invention with a base oil (such as sweet almond oil, jojoba oil, etc.) at a ratio of 1:10 and use it for body massage to relieve muscle tension and promote relaxation.

[0067] 2. Spray: Mix the natural essential oil of this invention with distilled water at a ratio of 1:50, put the mixture into a spray bottle, and spray it into the room air to create a relaxing atmosphere.

[0068] 3. Application: The natural essential oils of this invention are combined with a gel matrix or patch material to create a mood-boosting patch. When using, apply the mood-boosting patch to the chest, temples, or inside of the wrist. The essential oil components are slowly absorbed through the skin to achieve a mood-boosting effect.

[0069] 4. Skin care products: The natural essential oils of this invention are mixed with skin care product bases (such as lotions, creams, serums, etc.) at a ratio of 1:200 to make skin care products with refreshing effects.

[0070] In summary, this invention discloses a natural essential oil for refreshing and invigorating the mind, comprising the following raw materials in parts by weight: 25-35 parts Artemisia annua essential oil, 20-30 parts Rhododendron molle essential oil, 15-25 parts Cardamom essential oil, 10-20 parts Tangerine peel essential oil, and 10-15 parts Chrysanthemum indicum essential oil. The natural essential oil of this invention is entirely composed of natural plant extracts, containing no chemically synthesized components, and is safe and free of toxic side effects. Specifically, Artemisia annua essential oil enhances its stimulating and invigorating properties; Rhododendron molle essential oil stimulates the olfactory nerves and regulates nerve function; Cardamom essential oil promotes brain circulation and increases excitability; Tangerine peel essential oil relieves fatigue and optimizes the olfactory experience; and Chrysanthemum indicum essential oil excites the central nervous system and maintains alertness. The synergistic effect of these multiple components enhances the overall invigorating effect.

[0071] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A natural essential oil for refreshing the mind, characterized in that, The preparation raw materials include the following weight parts: 25-35 parts of artemisia argyi essential oil, 20-30 parts of rhododendron anthopogon essential oil, 15-25 parts of myristica fragrans essential oil, 10-20 parts of citrus reticulata essential oil, and 10-15 parts of chrysanthemum indicum essential oil.

2. The natural essential oil for refreshing the mind according to claim 1, wherein The preparation raw materials include the following weight parts: 30 parts of artemisia argyi essential oil, 25 parts of rhododendron anthopogon essential oil, 20 parts of myristica fragrans essential oil, 15 parts of citrus reticulata essential oil, and 12 parts of chrysanthemum indicum essential oil.

3. A method of preparing the natural essential oil for refreshing the mind according to claim 1 or 2, characterized in that, The method comprises the following steps: S1, preparing rhododendron anthopogon essential oil: removing impurities from rhododendron anthopogon, and then performing reduced-pressure distillation to obtain rhododendron anthopogon crude extract; filtering the rhododendron anthopogon crude extract through an organic filter membrane to obtain the rhododendron anthopogon essential oil; S2, mixing the rhododendron anthopogon essential oil with artemisia argyi essential oil, myristica fragrans essential oil, citrus reticulata essential oil, and chrysanthemum indicum essential oil to obtain the natural essential oil for refreshing and invigorating the mind.

4. The method for preparing the invigorating natural essential oil as described in claim 3, characterized in that, The reduced-pressure distillation is performed by using water bath heating, and the temperature rising rate is 1 ℃ / min.

5. The method for preparing the invigorating natural essential oil as described in claim 4, characterized in that, The vacuum degree of the reduced-pressure distillation is 0.090-0.095 Mpa, and the water bath temperature is 60-70 ℃.

6. The method for preparing the invigorating natural essential oil as described in claim 3, characterized in that, In step S1, the organic filter membrane is activated by being soaked in ethanol before use.

7. The method for preparing the invigorating natural essential oil as described in claim 3, characterized in that, The artemisia argyi essential oil is obtained by water vapor distillation, and the extraction solvent of the water vapor distillation is water.

8. The method of claim 7, wherein the method is characterized by, The water vapor distillation is performed by using stepwise temperature rising, that is, first rising to 80 ℃ at a rate of 5 ℃ / min and maintaining for 15 min, and then rising to 100 ℃ at a rate of 2 ℃ / min.

9. The method for preparing the invigorating natural essential oil as described in claim 3, characterized in that, The myristica fragrans essential oil is obtained by water vapor distillation, and the extraction solvent of the water vapor distillation is a 0.1 wt% citric acid solution.

10. The method for preparing the invigorating natural essential oil as described in claim 9, characterized in that, The temperature of the water vapor distillation is 105-110 ℃.

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