Rosmarinus officinalis-chrysopogon zizyphus-paeonia delavayi synergistic distillation composite hydrolat preparation method and application

Abstract

The present application relates to a kind of rosemary-lavender-Dianmudan synergistic distillation compound hydrolat preparation method, the present application is aimed at rosemary, agarwood, Yunnan Dianmudan three kinds of raw materials texture difference is big, distillation adaptability is contrary, physical compounding has no synergistic effect industry pain point, first create gradient segmented synchronous steam distillation process, first through high temperature and high pressure pre-distillation realizes the deep wall breaking of agarwood wood structure, then through low temperature and reduced pressure synchronous co-distillation realizes the synchronous reservation and synergistic dissolution of rosemary and Dianmudan heat-sensitive active ingredients, completely solve the single distillation active ingredient loss, multi-raw material physical compounding hydrolat poor stability, single efficacy, the core problem of fragrance tone fragmentation.

Description

Technical Field

[0001] This invention relates to the field of plant extraction technology, and in particular to a method for preparing and applying a composite hydrosol prepared by synergistic distillation of rosemary, agarwood, and peony. Background Technology

[0002] Hydrosols are water-soluble aqueous distillates obtained during the steam distillation of aromatic plants to extract essential oils. They are rich in water-soluble active ingredients and trace amounts of essential oils. Due to their natural safety and clear efficacy, they are widely used in the fields of daily chemicals, aromatherapy, and skincare.

[0003] Rosemary hydrosol is rich in verbenatone, rosmarinic acid, and terpenoid active ingredients, possessing excellent air purification, antibacterial, and invigorating effects. It can continuously release active oxygen and negative oxygen ions through photochemical reactions, making it a core functional ingredient for forest oxygen bar themed products. Agarwood hydrosol is rich in agarinol and sesquiterpenoids, possessing a mellow woody forest fragrance that can soothe the nerves, relieve stress, and aid in antibacterial activity, making it a high-quality base ingredient for forest fragrances. Yunnan peony hydrosol is rich in paeoniflorin, paeonol, flavonoids, and anthocyanins, possessing excellent soothing, repairing, antioxidant, and anti-allergic effects. Its fragrance is elegant and gentle, neutralizing the sharpness of herbal and woody scents while enhancing the stability of active ingredients, making it a high-quality synergistic ingredient for forest oxygen bar themed products.

[0004] In existing technologies, rosemary, agarwood, and Yunnan peony hydrosols are all prepared individually by steam distillation and then physically compounded, which has the following unresolved core defects: The distillation process has extremely poor compatibility, resulting in significant loss of active ingredients and very low yields: Agarwood, being a woody raw material with a dense structure, requires high-temperature, long-term distillation to release its active ingredients, easily leading to the degradation of heat-sensitive sesquiterpenes; Rosemary, made from fresh branches and leaves, contains highly heat-sensitive core components such as verbenatone and rosmarinic acid, which undergo significant decomposition and inactivation during prolonged high-temperature distillation; and Peony peony, made from fresh petals, contains even more heat-sensitive components such as paeoniflorin and anthocyanins, which show significant degradation and inactivation after prolonged treatment at temperatures above 40°C. The distillation conditions for these three raw materials are completely contradictory; individual distillation cannot simultaneously guarantee the yield and retention of active ingredients, resulting in low levels of core functional components in the final product and failing to achieve synergistic effects from multiple raw materials.

[0005] Physical compounding lacks synergistic effects, resulting in significant product performance defects: hydrosols physically mixed after separate distillation lack synergistic solubilizing effects on active ingredients, have low solubility of water-soluble active ingredients, and exhibit extremely poor storage stability, becoming cloudy, layered, and discolored after 3 months of storage at room temperature; the release of active oxygen / negative oxygen ions lasts only 1-2 hours, and the air purification and antibacterial effects decay rapidly; the fragrance notes are fragmented, with herbal, woody, and floral scents failing to blend, requiring the addition of artificial fragrances, solubilizers, and fixatives, which does not conform to the positioning of natural products and is prone to causing respiratory irritation and skin sensitization.

[0006] Poor adaptability to various scenarios, failing to meet the comprehensive needs of forest oxygen bar products: single rosemary hydrosol has a pungent aroma and short-lasting scent, easily causing nerve excitation when used before bed, and is unfriendly to sensitive skin and respiratory tracts; single agarwood hydrosol has weak active oxygen release capacity and poor air purification effect; single Yunnan peony hydrosol has no significant air purification and antibacterial effects. Physically compounded products cannot simultaneously meet the dual needs of refreshing and calming, air purification and gentle repair, and are not suitable for all scenarios such as office, home, car, and bedtime. They also have problems such as high cost, large amount of added preservatives, and high compliance and filing risks.

[0007] Currently, there is no existing technology for a ternary synergistic distillation process for rosemary, agarwood, and Yunnan peony. This cannot solve the long-standing industry pain point of conflicting distillation conditions for the three raw materials, nor can it achieve synergistic effects of active ingredients. It is difficult to meet the core requirements of forest oxygen bar-themed products for naturalness, long-lasting effects, adaptability to all scenarios, synergistic effects of multiple functions, and low-cost large-scale production. Summary of the Invention

[0008] This invention provides a rosemary-agarwood-Yunnan peony synergistic distillation compound hydrosol. By overcoming the technical bottleneck of conflicting distillation conditions for these three raw materials, this invention balances the yield and activity retention of their core active ingredients, achieving synergistic solubilization and enhancement of the three active components. This improves the product's long-lasting air purification, antibacterial properties, soothing and repairing effects, and storage stability. Furthermore, the product requires no artificial fragrances, solubilizers, or fixatives; its natural scent aligns with the theme of a forest oxygen bar, offering both invigorating and soothing, purifying and repairing effects. It is suitable for all scenarios and skin types, with a simple and cost-controllable process, requiring no additional specialized equipment, making it suitable for large-scale production. The product has strong compliance and is risk-free for registration.

[0009] Therefore, it is necessary to provide a method for preparing a rosemary-agarwood-Yunnan peony co-distillation compound hydrosol, including the following steps: S1. Soak agarwood powder in a solvent to obtain agarwood pretreatment solution; S2. Distill the agarwood pretreatment liquid to obtain agarwood distillate; S3. The agarwood distillate, rosemary, and Yunnan peony are distilled, the distillate is collected by condensation, and then purified to obtain the rosemary-agarwood-Yunnan peony co-distillation composite hydrosol.

[0010] Further, in step S1, the mass ratio of the agarwood powder to the solvent is 1:(4-6).

[0011] Further, in step S2, the distillation temperature is 95-100℃, and the distillation pressure is 0.08-0.1MPa.

[0012] Further, in step S3, the distillation temperature is 82-88℃, and the distillation pressure is 0.03-0.045MPa.

[0013] Furthermore, in step S3, the reflux ratio of the distillation column is 1:(3-5).

[0014] Furthermore, the mass ratio of rosemary, agarwood powder, and fresh petals of Peony yunnanensis is (2-4):1:(0.2-1).

[0015] Further, in step S3, the purification process includes the following steps: Under light-proof and sealed conditions, the mixture was allowed to stand at room temperature to separate into layers. The lower aqueous phase solution was then taken out, filtered, and the resulting rosemary-agarwood-Yunnan peony co-distillation complex hydrosol was obtained.

[0016] Furthermore, the filtration process employs a microporous membrane with a diameter of 0.20-0.24 μm.

[0017] This invention also provides a rosemary-agarwood-Yunnan peony synergistic distillation composite hydrosol, which is prepared by the aforementioned method.

[0018] The present invention also provides the application of the rosemary-agarwood-Yunnan peony co-distillation compound hydrosol in care products, the care products including one of the following: air purification spray, car fragrance liquid, aroma diffuser refill liquid, multi-effect skin care spray for all skin types, and sensitive skin repair hydrosol.

[0019] Specifically, the rosemary-agarwood-Yunnan peony co-distillation composite hydrosol prepared by this invention has a pH value of 4.5-5.5, which is consistent with the pH value of the skin's sebum membrane and is environmentally friendly. The content of rosmarinic acid is ≥95μg / mL, the content of agaric spirol is ≥40μg / mL, the content of verbenaconone is ≥30μg / mL, and the content of paeoniflorin is ≥20μg / mL. The content of core active ingredients is increased by more than 110% compared with the traditional ternary single distillation compounding process and by more than 55% compared with the binary co-distillation process.

[0020] Specifically, the active oxygen / negative oxygen ion release capacity of the compound hydrosol is increased by more than 45% compared with that of the physically compounded hydrosol, and the effective release duration is extended from 1-2 hours to more than 12 hours; the inhibition rate of Staphylococcus aureus, Escherichia coli and Candida albicans in the air is more than 99.9%; paeoniflorin and rosmarinic acid synergistically enhance the antioxidant effect; the DPPH free radical scavenging rate is increased by more than 60%; and it has excellent soothing and anti-allergic and respiratory repair effects, which can significantly reduce the amount of preservatives added. This invention utilizes industry-standard steam distillation equipment throughout the entire process, eliminating the need for additional specialized equipment, organic solvents, and complex purification procedures. The process is short and batch stability is excellent. Through high raw material utilization and process integration, the overall production cost is reduced by more than 40% compared to the traditional ternary single distillation and compounding process, and by more than 15% compared to the binary co-distillation process, demonstrating strong industrialization value.

[0021] In terms of stability: the compound hydrosol showed no stratification, turbidity, or discoloration after 24 months of storage at room temperature away from light. It also showed no abnormalities in cold and heat resistance tests at -18℃ / 48℃ for 72 hours, far superior to traditional physically compounded hydrosols and binary synergistic distilled hydrosols. In terms of fragrance: it naturally forms a layered forest fragrance with a top note of fresh rosemary herbs, a middle note of soft and elegant Yunnan peony flowers, and a base note of mellow agarwood woody notes. It does not require any artificial fragrances, solubilizers, or fixatives, which fits the theme of a forest oxygen bar. At the same time, it has the triple effects of rosemary invigorating the mind, agarwood calming and soothing the nerves, and Yunnan peony soothing and calming the body. It is suitable for all scenarios such as office, home, car, and bedtime, and is extremely friendly to sensitive respiratory tracts and sensitive skin.

[0022] Furthermore, the rosemary, agarwood, and Yunnan peony raw materials used in this invention are all included in the "Catalogue of Used Cosmetic Raw Materials" (2021 edition), with no usage limits. The preparation process involves no chemical additives, making the product natural and safe. There is no risk in the registration of cosmetics and daily chemical products. It can be widely used in multiple fields such as space care and skin care, and is especially suitable for the development of forest oxygen bar-themed products, possessing extremely high commercial value.

[0023] The present invention has the following beneficial effects: This invention pioneers a gradient segmented simultaneous steam distillation process. First, high-temperature and high-pressure pre-distillation deeply breaks down the wood structure of agarwood, solving the problem of poor dissolution of active ingredients. Then, rosemary, agarwood, and peony are simultaneously distilled. Through precise temperature control and low-temperature reduced-pressure co-distillation, the terpenes and phenols in rosemary, the sesquiterpenes in agarwood, and the flavonoids and paeoniflorin in peony exhibit a molecular-level synergistic solubilization effect. This not only significantly improves the overall performance of the product but also protects the heat-sensitive active ingredients of rosemary and peony. This solves the long-standing industry pain point of completely contradictory distillation conditions for the three raw materials. The yield of core active ingredients is more than 110% higher than that of traditional single distillation processes and more than 55% higher than that of binary co-distillation processes, maximizing the retention of active ingredients from the three raw materials. Detailed Implementation

[0024] To more clearly illustrate the technical solution of the present invention, the following embodiments are provided. Unless otherwise stated, the raw materials, reactions, and post-processing methods appearing in the embodiments are all commercially available raw materials and technical methods well known to those skilled in the art.

[0025] The terms "preferred," "more preferably," and "more suitable" used in this invention refer to embodiments of the invention that provide certain beneficial effects under certain circumstances. However, other embodiments may also be preferred under the same or other circumstances. Furthermore, the description of one or more preferred embodiments does not imply that other embodiments are unavailable, nor is it intended to exclude other embodiments from the scope of this invention.

[0026] It should be understood that, except in any operational instance or otherwise indicated, all figures representing the amounts of ingredients used, for example, in the specification and claims, should be understood to be modified in all cases by the term "about". Therefore, unless otherwise stated, the numerical parameters set forth in the following specification and appended claims are approximations varying with the desired performance to be obtained according to the invention.

[0027] Example 1 A method for preparing a rosemary-agarwood-Yunnan peony synergistic distillation complex hydrosol includes the following steps: S11. Grind the agarwood from Guangdong into 15 mesh, weigh 10 kg of agarwood powder, add 50 kg of deionized water, soak at room temperature for 18 hours to obtain agarwood pretreatment liquid. S12. Select fresh verbena-type rosemary branches and leaves, wash and drain them, cut them into 1.5cm sections, weigh 30kg (rosemary: agarwood powder = 3:1), and refrigerate at 4℃ away from light for later use. S13. Select fresh, fully blooming petals of Yunnan Peony, wash and drain them, weigh 5 kg (Yunnan Peony: Agarwood Powder = 0.5:1), and store at 4℃ away from light for later use. S21. Add the agarwood pretreatment liquid to a 500L distillation kettle, seal and heat to 98℃ inside the kettle, pressure 0.09MPa, reflux pre-distill for 45min to complete the deep cell wall breaking of the agarwood wood structure. S22. After pre-distillation, stop heating, quickly depressurize to atmospheric pressure, and simultaneously and quickly add the refrigerated rosemary and Yunnan peony into the distillation vessel. After sealing, reheat and control the temperature inside the vessel to 85℃ and the pressure to 0.04MPa. Perform vacuum steam distillation, control the reflux ratio to 1:4, and continue distilling for 105 minutes. Collect the distillate by condensation throughout the process, and collect a total of 45kg of distillate. S3. The distillate was rapidly cooled to 20°C, transferred to a light-proof and sealed container, and allowed to stand at room temperature for 18 hours. The trace amount of essential oil in the upper layer was separated and removed. The lower aqueous phase was filtered through a 0.22μm microporous membrane to obtain 43.6 kg of rosemary-agarwood-Yunnan peony co-distillation complex hydrosol, with a yield of 96.89%. The compound hydrosol prepared in this example was tested and found to have a pH of 5.1, a rosmarinic acid content of 102.8 μg / mL, anorthospirol content of 45.7 μg / mL, verbenaconin content of 32.4 μg / mL, and paeoniflorin content of 26.3 μg / mL.

[0028] Example 2 A method for preparing a rosemary-agarwood-Yunnan peony synergistic distillation complex hydrosol includes the following steps: S11. Select agarwood from Hainan, grind it to 20 mesh, weigh 10 kg of agarwood powder, add 60 kg of deionized water, soak at room temperature for 24 hours to obtain agarwood pretreatment solution. S12. Select fresh verbena-type rosemary branches and leaves, wash and drain them, cut them into 2cm sections, weigh 40kg (rosemary: agarwood powder = 4:1), and refrigerate at 4℃ away from light for later use. S13. Select fresh, fully blooming petals of Yunnan Peony, wash and drain them, weigh 8 kg (Yunnan Peony: Agarwood Powder = 0.8:1), and store at 4℃ away from light for later use. S21. Add the agarwood pretreatment liquid to the distillation vessel, seal and heat to 100℃ inside the vessel, pressure 0.1MPa, and reflux for 60 minutes for pre-distillation. S22. After pre-distillation, stop heating, quickly depressurize to atmospheric pressure, then add rosemary and peony root, seal and control the temperature inside the vessel at 88℃ and the pressure at 0.045MPa. Distill under reduced pressure with a reflux ratio of 1:5 for 120 minutes and collect 55kg of distillate. S3. Cool the distillate to 22°C, let it stand for 24 hours, separate the essential oil, filter and sterilize to obtain 53.2 kg of compound hydrosol, with a yield of 96.73%; The compound hydrosol prepared in this example was tested and found to have a pH of 5.3, a rosmarinic acid content of 108.5 μg / mL, anorthospirol content of 42.1 μg / mL, verbenatone content of 34.6 μg / mL, and paeoniflorin content of 31.5 μg / mL.

[0029] Example 3 A method for preparing a rosemary-agarwood-Yunnan peony co-distillation compound hydrosol. The difference between this embodiment and Example 1 is that the amount of fresh Yunnan peony petals is 10kg (Yunnan peony: agarwood powder = 1:1), and the other process parameters are completely the same as in Example 1. The final product is a rosemary-agarwood-Yunnan peony co-distillation complex hydrosol with a paeoniflorin content of 38.7μg / mL, which has a more prominent soothing and repairing effect and is specially designed for people with sensitive skin and sensitive respiratory tracts.

[0030] Example 4 A method for preparing a rosemary-agarwood-Yunnan peony synergistic distillation complex hydrosol, in this embodiment, is carried out according to the process parameters of Example 1, with a 10-fold scale-up production, specifically including the following steps: S11. Grind the agarwood from Guangdong into 15 mesh, weigh 100 kg of agarwood powder, add 500 kg of deionized water, soak at room temperature for 18 hours to obtain agarwood pretreatment liquid. S12. Select fresh verbena-type rosemary branches and leaves, wash and drain them, cut them into 1.5cm sections, weigh 300kg (rosemary: agarwood powder = 3:1), and refrigerate at 4℃ away from light for later use. S13. Select fresh, fully blooming petals of Yunnan Peony, wash and drain them, weigh 50 kg (Yunnan Peony: Agarwood Powder = 0.5:1), and store at 4℃ away from light for later use. The remaining process parameters are completely consistent with those in Example 1. The final product was 432 kg of rosemary-agarwood-Yunnan peony co-distillation compound hydrosol, with a batch-to-batch deviation of active ingredient content ≤2.5%, which meets the requirements for industrial production.

[0031] Comparative Example 1 A method for preparing rosemary hydrosol includes the following steps: weigh 30 kg of rosemary raw material from the same batch as in Example 1, add 150 kg of deionized water, perform conventional atmospheric pressure steam distillation for 105 min, collect 40 kg of distillate, cool, let stand, and filter to obtain rosemary hydrosol.

[0032] The rosemary hydrosol prepared in this comparative example was tested and found to contain 58.3 μg / mL of rosmarinic acid and 16.2 μg / mL of verbenatone.

[0033] Comparative Example 2 A method for preparing agarwood hydrosol includes the following steps: weigh 10 kg of agarwood powder from the same batch as in Example 1, add 50 kg of deionized water, soak for 18 h, perform conventional atmospheric pressure steam distillation for 150 min, collect 40 kg of distillate, cool, let stand, and filter to obtain agarwood hydrosol.

[0034] The agarwood hydrosol prepared in this comparative example was found to contain 19.6 μg / mL of agarospirol.

[0035] Comparative Example 3 A method for preparing Yunnan peony hydrosol includes the following steps: weigh 5 kg of fresh Yunnan peony petals from the same batch as in Example 1, add 25 kg of deionized water, perform conventional low-temperature vacuum steam distillation for 105 min, collect 40 kg of distillate, cool, let stand, and filter to obtain Yunnan peony hydrosol.

[0036] The Yunnan peony hydrosol prepared in this comparative example was tested and found to contain 11.8 μg / mL of paeoniflorin.

[0037] Comparative Example 4 A method for preparing a rosemary-agarwood-Yunnan peony compound hydrosol includes the following steps: The rosemary hydrosol prepared in Comparative Example 1, the agarwood hydrosol prepared in Comparative Example 2, and the Yunnan peony hydrosol prepared in Comparative Example 3 were mixed evenly in a mass ratio of 30:10:5 to obtain a ternary physical compound hydrosol.

[0038] The test results showed that the compound hydrosol prepared in this comparative ratio contained 41.2 μg / mL rosmarinic acid, 13.5 μg / mL linalool, 11.4 μg / mL verbenatone, and 8.2 μg / mL paeoniflorin.

[0039] Comparative Example 5 A method for preparing a rosemary-agarwood compound hydrosol includes the following steps: The binary composite hydrosol was prepared according to the process parameters of Example 1 of the original patent. The raw materials were from the same batch as in Example 1, with 30 kg of rosemary and 10 kg of agarwood powder added. No Yunnan peony was added.

[0040] The binary composite hydrosol prepared in this comparative example was tested and found to contain 92.6 μg / mL rosmarinic acid, 41.3 μg / mL linalool, and 28.7 μg / mL verbenatone, with no paeoniflorin detected.

[0041] Comparative Example 6 A method for preparing a rosemary-agarwood-Yunnan peony compound hydrosol, the difference between this comparative example and Example 1 is that step S21 is removed, and step S22 is replaced by: S22. Quickly add the refrigerated rosemary, Yunnan peony and agarwood powder into the distillation kettle, seal it and heat it up. Control the temperature inside the kettle to 85℃ and the pressure to 0.04MPa. Perform vacuum steam distillation, control the reflux ratio to 1:4, and continue distilling for 105 minutes. Collect the distillate by condensation throughout the process. A total of 45kg of distillate is collected. The remaining process parameters are completely consistent with those in Example 1.

[0042] Application Example 1 Preparation of space purification spray This embodiment uses the composite hydrosol prepared in Example 1 to prepare a spray. By mass percentage, the formula is: 99% rosemary-agarwood-Yunnan peony co-distilled composite hydrosol, 0.7% phenoxyethanol, and the balance being ethylhexylglycerin.

[0043] Preparation method: Under normal temperature and pressure, add each component to the mixing tank in proportion, stir at 30 r / min for 15 min until completely homogeneous, filter through a 0.22 μm filter membrane, and fill into a spray bottle to obtain the finished product.

[0044] Application Example 2 Preparation of multi-effect skin care spray for all skin types This embodiment uses the composite hydrosol obtained in Example 1 to prepare a skin care spray. The formula, by mass percentage, is as follows: 58% rosemary-agarwood-Yunnan peony co-distilled composite hydrosol, 39% deionized water, 1.5% glycerin, 0.8% panthenol, 0.1% sodium hyaluronate, and the balance being phenoxyethanol.

[0045] Preparation method: Under normal temperature and pressure, deionized water, glycerin, panthenol, and sodium hyaluronate are stirred until completely dissolved. The compound hydrosol is added and stirred evenly. Finally, the remaining ingredients are added, stirred evenly, filtered, and bottled to obtain the finished product.

[0046] Application Example 3 Preparation of Sensitive Skin Repair Hydrosol This embodiment uses the composite hydrosol obtained in Example 3 to prepare the repair hydrosol. By mass percentage, the formula is: 99.7% rosemary-agarwood-Yunnan peony co-distillation composite hydrosol, 0.2% p-hydroxyacetophenone, and the balance is 1,2-hexanediol.

[0047] Preparation method: Under normal temperature and pressure, add each component to the mixing tank in proportion, stir at low speed until completely homogeneous, filter through a 0.22μm filter membrane, and aseptically fill to obtain the finished product.

[0048] Test Example 1 Comparison test of the content of core active ingredients The core active ingredients of the products from Example 1 and Comparative Examples 1-6 were tested, and the results are shown in Table 1 below: Table 1. Test results of the core active ingredients of the products in Example 1 and Comparative Examples 1-6 Experimental conclusions: The ternary composite hydrosol prepared in Example 1 of this invention has a core active ingredient content that is more than 120% higher than that of the ternary physically compounded hydrosol in Comparative Example 4, and more than 55% higher than that of the binary synergistic distillation hydrosol in Comparative Example 5. Comparative Example 6 did not have agarwood pre-disruption at high temperature and high pressure, and the three raw materials were directly co-distilled at low temperature and reduced pressure. There was no molecular-level synergistic solubilization, the agarwood cell wall was not sufficiently broken, and the dissolution of active ingredients was low. This proves that the ternary synergistic distillation process of this invention achieves molecular-level synergistic solubilization of active ingredients, which greatly improves the yield and retention rate of active ingredients and has unexpected technical effects.

[0049] Test Example 2 Comparison of reactive oxygen species release and antibacterial properties The duration of reactive oxygen species release and the airborne antibacterial rate of the samples from Example 1 and Comparative Examples 4-6 were tested, and the results are shown in Table 2 below: Table 2. Product performance test results of Example 1 and Comparative Examples 4-6 Experimental conclusion: The ternary composite hydrosol prepared by this invention has an effective release time of active oxygen that is 47% longer than that of binary composite hydrosol and more than 7 times longer than that of physically compounded hydrosol. Compared with Comparative Example 6, its long-lasting antibacterial performance is significantly improved, solving the core pain point of rapid efficacy decay of traditional hydrosols.

[0050] Test Example 3 Comparison of antioxidant and soothing repair properties The DPPH free radical scavenging rate and hyaluronidase inhibition rate (reflecting anti-allergic and soothing efficacy) of the samples from Example 1 and Comparative Examples 4-6 were tested, and the results are shown in Table 3 below: Table 3. Product performance test results of Example 1 and Comparative Examples 4-6 Experimental conclusion: The ternary composite hydrosol prepared by this invention has an antioxidant capacity that is more than 60% higher than that of the binary composite hydrosol, and an anti-allergy and soothing effect that is 170% higher. Comparative Example 6 shows that the synergistic solubilization plays a key role in anti-oxidation and soothing effects. Example 1 achieves multi-effect synergy of air purification, antibacterial, and soothing repair, expanding the application scenarios and target audience of the product.

[0051] Test Example 4 Storage stability comparison The samples from Example 1 and Comparative Examples 4-6 were subjected to room temperature storage and cold and heat resistance stability tests. The results are shown in Table 4 below: Table 4. Product performance test results of Example 1 and Comparative Examples 4-6 Experimental conclusions: The storage stability of the ternary composite hydrosol prepared by this invention is on par with that of the binary co-distilled hydrosol, and far superior to that of traditional physically compounded hydrosols. The components in Comparative Example 6 showed uneven dissolution. It can be seen that Example 1 of this invention has excellent heat and cold resistance, meeting the requirements of a 24-month shelf life for daily chemical products.

[0052] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for preparing a rosemary-agarwood-Yunnan peony synergistic distillation complex hydrosol, characterized in that, Includes the following steps: S1. Soak agarwood powder in a solvent to obtain agarwood pretreatment solution; S2. Distill the agarwood pretreatment liquid to obtain agarwood distillate; S3. The agarwood distillate, rosemary, and Yunnan peony are distilled, the distillate is collected by condensation, and then purified to obtain the rosemary-agarwood-Yunnan peony co-distillation composite hydrosol.

2. The method for preparing the rosemary-agarwood-Yunnan peony synergistic distillation complex hydrosol according to claim 1, characterized in that, In step S1, the mass ratio of agarwood powder to solvent is 1:(4-6).

3. The method for preparing the rosemary-agarwood-Yunnan peony synergistic distillation complex hydrosol according to claim 1, characterized in that, In step S2, the distillation temperature is 95-100℃ and the distillation pressure is 0.08-0.1MPa.

4. The method for preparing the rosemary-agarwood-Yunnan peony synergistic distillation complex hydrosol according to claim 1, characterized in that, In step S3, the distillation temperature is 82-88℃ and the distillation pressure is 0.03-0.045MPa.

5. The method for preparing the rosemary-agarwood-Yunnan peony synergistic distillation complex hydrosol according to claim 1, characterized in that, In step S3, the reflux ratio of the distillation column is 1:(3-5).

6. The method for preparing the rosemary-agarwood-Yunnan peony synergistic distillation complex hydrosol according to claim 1, characterized in that, The mass ratio of rosemary, agarwood powder, and Yunnan peony is (2-4):1:(0.2-1).

7. The method for preparing the rosemary-agarwood-Yunnan peony synergistic distillation complex hydrosol according to claim 1, characterized in that, In step S3, the purification process includes the following steps: Under light-proof and sealed conditions, the mixture was allowed to stand at room temperature to separate into layers. The lower aqueous phase solution was then taken out, filtered, and the resulting rosemary-agarwood-Yunnan peony co-distillation complex hydrosol was obtained.

8. The method for preparing the rosemary-agarwood-Yunnan peony synergistic distillation complex hydrosol according to claim 7, characterized in that, The filtration process uses a microporous membrane with a diameter of 0.20-0.24 μm.

9. The application of the product prepared by the method of preparing the rosemary-agarwood-peony synergistic distillation complex hydrosol according to any one of claims 1-8 in care products, characterized in that, The care products include one of the following: air purification spray, car air freshener, air freshener for diffusers, multi-effect skin care spray for all skin types, and hydrosol for sensitive skin repair.

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