Peony flower essential oil extraction device

Abstract

The utility model discloses a peony flower essential oil extraction device which comprises a distillation flask (1), a first bent pipe (3), a condensation pipe (4), a second bent pipe (5), a U-shaped pipe (7) and a separator (8), wherein one side of the distillation flask (1) is provided with a water replenishing port (2); an opening in the top end of the distillation flask (1) is hermetically connected with a first end (31) of a first bent pipe; a second end (32) of the first bent pipe is hermetically connected with a first end (41) of the condenser pipe; a second end (42) of the condenser pipe is hermetically connected with a first end (51) of the second bent pipe; a second end (52) of the second bent pipe is hermetically connected with a first end (71) of the U-shaped pipe; a second end (72) of the U-shaped pipe is connected with a first end (81) of the separator through a flow guide pipe (6); and the separator (8) is provided with a hydrolat outlet (10). By applying the device, two kinds of peony flower essential oil can be extracted at the same time, the extraction process is simple in technology and convenient to control, and more choices are provided for essential oil production.

Description

Technical Field

[0001] The utility model relates to an essential oil extraction device, in particular to a peony essential oil extraction device. Background Art

[0002] Peony essential oil, extracted from the peony flower, one of my country's ten most famous flowers, solidifies at room or low temperatures into a pale yellow or white solid with delicate patterns and a snowflake-like shape. As a traditional ornamental flower in my country, the peony flower, with its vibrant colors and elegant appearance, has long been a favorite. Its petals are also rich in active substances such as amino acids, vitamins, and flavonoids, earning it considerable attention for its edible, medicinal, and aesthetic properties. Peony essential oil, the concentrated essence of the petals, is an extremely valuable blend of numerous active substances found in the petals. These include monoterpenoid glycosides, polyphenols, flavonoids, volatile oils, fatty acids, sterols, and tannins, many of which possess important physiological functions such as antibacterial, antioxidant, and anti-cancer properties. The main components of peony essential oil are volatile oils, which are also the main components of the peony fragrance. They mainly include aromatic hydrocarbons, alkanes, alcohols, ethers, ketones, and aldehydes. They have positive effects on the cardiovascular, central nervous, respiratory and gastrointestinal systems, and also have certain effects in antibacterial, anti-inflammatory, and anti-cancer aspects. Flavonoids can effectively scavenge superoxide anion free radicals, and their antioxidant effect is more significant.

[0003] How to efficiently, effectively, and efficiently extract essential oils with low energy consumption and low cost has long been a hot topic in this field of research. Currently, the main methods used include steam distillation, organic solvent extraction, and supercritical carbon dioxide extraction. These existing methods generally suffer from low yields, high costs, and unsuitability for industrial extraction. Patent Publication No. CN113265300A utilizes a solvent extraction method to extract peony essential oil: peony flowers are soaked in a non-polar solvent to obtain a peony flower extract, which is then removed with a polar solvent to obtain the essential oil. This method yields an aromatic essential oil with a relatively thorough extraction of fat-soluble components. However, the extraction process is cumbersome and can result in loss of essential oil components. The extensive use of organic solvents can also lead to adulteration of the finished product with toxic organic compounds, and the cost is relatively high compared to steam distillation. Patent publication number CN102080018A utilizes a steam distillation method to extract peony essential oil: fresh peony petals are collected, salted in 10% sodium chloride, and then steam distilled. A 1-20-fold amount of distillate is collected and impurities are removed using molecular interception. The intercepted liquid is extracted with ethyl acetate, and the ethyl acetate is recovered under reduced pressure. The remaining liquid is steam distilled to collect the lighter and heavier fractions, which are then dehydrated with anhydrous sodium sulfate and filtered to obtain peony essential oil. This method is simple and low-cost, but the extraction rate is low and it cannot separate the water-soluble and fat-soluble components of the essential oil.

[0004] Existing peony essential oil extraction devices mainly include the following types:

[0005] (1) Steam distillation apparatus: Principle: Use steam to evaporate the essential oil from peony petals, then condense and collect. Advantages: Simple operation and low equipment cost. Disadvantages: High temperature treatment may cause degradation of some heat-sensitive components, resulting in low extraction rate and high energy consumption.

[0006] (2) Solvent Extraction Device: Principle: Use an organic solvent (such as ethanol or ether) to dissolve the essential oil in peony petals, and then evaporate the solvent to obtain the essential oil. Advantages: High extraction efficiency and suitable for large-scale production. Disadvantages: Solvent residue may remain, and the selection and recovery of solvents are complicated, which has a certain impact on the environment.

[0007] (3) Supercritical Fluid Extraction Device: Principle: Utilizes supercritical carbon dioxide and other fluids as solvents to efficiently extract essential oils from peony petals. Advantages: High extraction efficiency, high essential oil purity, environmentally friendly, and no residue. Disadvantages: High equipment cost, high operating skills, and complex maintenance.

[0008] (4) Enzymatic Extraction Device: Principle: By adding specific enzymes to catalyze the decomposition of plant cell walls, more essential oils are released. Advantages: High extraction rate, effective retention of heat-sensitive components, gentle and environmentally friendly. Disadvantages: High enzyme cost, enzyme activity is greatly affected by the environment, and the extraction process is complex to control. Utility Model Content

[0009] In view of this, the present invention proposes a peony essential oil extraction device. This peony essential oil extraction device utilizes steam distillation coupled with solvent extraction to extract water-soluble and fat-soluble essential oils from peony flowers. The present invention provides the following technical solutions:

[0010] A peony essential oil extraction device comprises a distillation bottle (1), a first curved pipe (3), a condenser (4), a second curved pipe (5), a U-shaped pipe (7), and a separator (8), wherein: a water supply port (2) is provided on one side of the distillation bottle (1); the top opening of the distillation bottle (1) is sealedly connected to the first end (31) of the first curved pipe; the second end (32) of the first curved pipe is sealedly connected to the first end (41) of the condenser; the second end (42) of the condenser is sealedly connected to the first end (51) of the second curved pipe; the second end (52) of the second curved pipe is sealedly connected to the first end (71) of the U-shaped pipe; the second end (72) of the U-shaped pipe is connected to the first end (81) of the separator via a guide pipe (6); and a pure oil exposure port (10) is provided on the separator (8).

[0011] Optionally, the pure exposure port (10) is arranged on the pure exposure port tube (18); the pure exposure port tube (18) is connected in parallel with the separator (8), and the first end (181) of the pure exposure port tube and the second end (182) of the pure exposure port tube are respectively connected to the separator (8); the pure exposure port (10) is arranged between the first end (181) of the pure exposure port tube and the second end (182) of the pure exposure port tube.

[0012] Optionally, the first clamp (12) is fixed to the first side of the first bracket (11), and the first clamp (12) clamps the distillation flask (1).

[0013] Optionally, the second clamp (13) is fixed to the second side of the first bracket (11), and the second clamp (13) clamps the U-shaped tube (7).

[0014] Optionally, the third clamp (14) is fixed to the first side of the second bracket (15), and the third clamp (14) clamps the first end (81) of the separator.

[0015] Optionally, the second end (82) of the separator is funnel-shaped, and a piston (16) is provided on the funnel-shaped neck; the bottom end of the funnel-shaped neck is the lower opening (19) of the separator.

[0016] Optionally, n-hexane (9) is contained in the separator (8).

[0017] Optionally, the bottom of the distillation flask (1) is arranged above the heater (17).

[0018] Optionally, the top opening of the distillation flask is sealedly connected to the first end (31) of the first curved pipe through a frosted pipe mouth.

[0019] Optionally, the second end of the first curved pipe (32) is connected to the first end of the condenser pipe (41) through a frosted pipe mouth and a frosted seal; the second end of the condenser pipe (42) is connected to the first end of the second curved pipe (51) through a frosted pipe mouth and a frosted seal; the second end of the second curved pipe (52) is connected to the first end of the U-shaped pipe (71) through a frosted pipe mouth and a frosted seal.

[0020] The peony essential oil extraction device of the utility model has the following beneficial effects:

[0021] (1) During the distillation stage, water is added to the distillation flask from the outside to ensure that the liquid level of the peony flower extract is approximately constant during the distillation process, thereby preventing the peony flower powder from agglomerating and sinking to the bottom and becoming sticky, making it easier for the essential oil and water vapor to diffuse, thereby improving the essential oil extraction rate.

[0022] (2) The pure water outlet pipe 18 is connected in parallel with the separator 8, and the first end 181 and the second end 182 of the pure water outlet pipe are respectively connected to the separator 8. During the separation process, the amount of water added to the separator 8 is required to ensure that the interface between water and n-hexane is slightly higher than the second end 182 of the pure water outlet pipe. This design can prevent n-hexane from overflowing through the pure water outlet.

[0023] (3) The device is used to extract peony essential oil, and water-soluble / fat-soluble peony essential oil and peony hydrosol products can be obtained at the same time. The device is coupled with a water-soluble / fat-soluble essential oil and hydrosol separation device. Innovatively utilizing the difference in solubility between fat-soluble essential oil and water-soluble essential oil in water and n-hexane, the non-water-soluble essential oil is enriched in the upper layer of the U-shaped tube with the water phase to obtain fat-soluble essential oil. The essential oil dissolved in water passes through the n-hexane phase, and the essential oil with higher oil solubility than water solubility enters the n-hexane phase. After distilling the n-hexane, water-soluble essential oil is obtained, while the aromatic compounds with lower oil solubility than water solubility remain in the water phase that passes through the n-hexane and enter the hydrosol. Therefore, the device can simultaneously obtain two products, water-soluble peony essential oil and fat-soluble essential oil, as well as peony hydrosol, and simultaneously achieve the graded separation of peony aromatic compounds.

[0024] (4) The two peony essential oils extracted using this device have different smells and colors. The water-soluble essential oil has a rich and fragrant smell and is light yellow in color, while the fat-soluble essential oil has a fresh and pleasant smell and is pure white in color, providing more options for essential oil production.

[0025] (5) With this device, the entire extraction process is simple and easy to control. The amount of organic solvent n-hexane used is small and can be reused. It is a green and efficient separation and extraction method that conforms to the concept of energy conservation and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] For purposes of illustration and not limitation, the present invention will now be described with reference to preferred embodiments thereof, particularly with reference to the accompanying drawings, in which:

[0027] Figure 1 This is a schematic diagram of the peony essential oil extraction device of the utility model;

[0028] In the picture:

[0029] 1. Distillation flask; 2. Water filling port; 3. First elbow; 31. First end of first elbow; 32. Second end of first elbow; 4. Condenser; 41. First end of condenser; 42. Second end of condenser; 5. Second elbow; 51. First end of second elbow; 52. Second end of second elbow; 6. Draft tube; 7. U-shaped tube; 71. First end of U-shaped tube; 72. Second end of U-shaped tube; 8. Separator; 81. First end of separator; 82. Second end of separator; 9. n-hexane; 10. Pure water outlet; 11. First bracket; 12. First clamp; 13. Second clamp; 14. Third clamp; 15. Second bracket; 16. Piston; 17. Heater; 18. Pure water outlet tube; 181. First end of pure water outlet tube; 182. Second end of pure water outlet tube; 19. Lower port of separator. DETAILED DESCRIPTION

[0030] Figure 1 This is a schematic diagram of the peony essential oil extraction device of the utility model. Figure 1 As shown, the peony essential oil extraction device includes a distillation bottle 1, a first curved pipe 3, a condenser 4, a second curved pipe 5, a U-shaped tube 7, and a separator 8, wherein a water supply port 2 is provided on one side of the distillation bottle 1; the top opening of the distillation bottle 1 is sealedly connected to the first end 31 of the first curved pipe through a frosted pipe mouth; the second end 32 of the first curved pipe is sealedly connected to the first end 41 of the condenser through a frosted pipe mouth; the second end 42 of the condenser is sealedly connected to the first end 51 of the second curved pipe through a frosted pipe mouth; the second end 52 of the second curved pipe is sealedly connected to the first end 71 of the U-shaped tube through a frosted pipe mouth; the second end 72 of the U-shaped tube is connected to the first end 81 of the separator through a guide pipe 6; and a pure water outlet 10 is provided on the separator 8. The pure water outlet 10 is provided on the pure water outlet tube 18; the pure water outlet tube 18 is connected in parallel with the separator 8, and the first end 181 and the second end 182 of the pure water outlet tube are respectively connected to the separator 8; the pure water outlet 10 is provided between the first end 181 and the second end 182 of the pure water outlet tube. The clamp 12 is fixed to the first side of the first bracket 11, and the first clamp 12 clamps the distillation flask 1. The clamp 13 is fixed to the second side of the first bracket 11, and the second clamp 13 clamps the U-shaped tube 7. The clamp 14 is fixed to the first side of the second bracket 15, and the third clamp 14 clamps the first end 81 of the separator. The second end 82 of the separator is funnel-shaped, and a piston 16 is provided on the neck of the funnel; the bottom end of the funnel-shaped neck is the separator lower port 19. The separator 8 contains n-hexane 9; the piston is closed during the separation process, and when the separation is completed, the piston is opened to recover the n-hexane. The bottom of the distillation flask 1 is arranged above the heater 17 .

[0031] The working principle of the peony essential oil extraction device of the present invention is as follows:

[0032] Peony flower powder boils in a saline solution in a distillation flask 1, and the peony flower essential oil, along with the steam, enters a condenser 4 through a first bend 3. The condensed and liquefied peony flower essential oil, together with liquid water, enters a U-shaped tube 7 for separation of fat-soluble essential oils through a second bend 5. Within the U-shaped tube 7, the fat-soluble essential oil and water form an oil-water separation interface, with the fat-soluble essential oil being enriched in the upper layer. After distillation is completed, the U-shaped tube is removed, and the fat-soluble essential oil is transferred via a pipette or both are transferred to a separatory funnel. After separation, the upper oil phase is intercepted and collected to obtain the fat-soluble essential oil, leaving the lower layer as an oil-water mixed solution containing the water-soluble essential oil. The oil-water mixed solution that contains water-soluble essential oil enters hydrosol / water-soluble essential oil separator 8 through flow guide 6, normal hexane 9 is filled in this separator 8, in the dripping process of mixed solution from top to bottom, completes the countercurrent extraction of water-soluble essential oil, water-soluble essential oil is transferred into normal hexane, and peony flower hydrosol then enters lower floor and overflows through hydrosol outlet 10 with normal hexane phase-splitting, collects hydrosol.After distillation finishes, separate upper organic phase, i.e. the organic phase on separator upper strata, obtains water-soluble essential oil by underpressure distillation again.The peony flower hydrosol main component is water, is different from fat-soluble or water-soluble essential oil, and the main component of essential oil is aromatic organic compound.Containing trace aromatic compounds that are higher in solubility in water than in normal hexane in the hydrosol.

[0033] The above specific embodiments do not limit the scope of protection of this utility model. Those skilled in the art will understand that various modifications, combinations, sub-combinations, and substitutions may occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model shall be included in the scope of protection of this utility model.

Claims

1. A peony essential oil extraction device, characterized in that: The invention comprises a distillation flask (1), a first curved pipe (3), a condenser (4), a second curved pipe (5), a U-shaped pipe (7), and a separator (8), wherein: a water supply port (2) is provided on one side of the distillation flask (1); the top opening of the distillation flask (1) is sealedly connected to the first end (31) of the first curved pipe; the second end (32) of the first curved pipe is sealedly connected to the first end (41) of the condenser; the second end (42) of the condenser is sealedly connected to the first end (51) of the second curved pipe; the second end (52) of the second curved pipe is sealedly connected to the first end (71) of the U-shaped pipe; the second end (72) of the U-shaped pipe is connected to the first end (81) of the separator via a flow guide pipe (6); and a pure water outlet (10) is provided on the separator (8).

2. The peony essential oil extraction device according to claim 1, characterized in that: The pure exposure port (10) is arranged on the pure exposure port tube (18); the pure exposure port tube (18) is connected in parallel with the separator (8); the first end (181) of the pure exposure port tube and the second end (182) of the pure exposure port tube are respectively connected to the separator (8); the pure exposure port (10) is arranged between the first end (181) of the pure exposure port tube and the second end (182) of the pure exposure port tube.

3. The peony essential oil extraction device according to claim 1, characterized in that: The first clamp (12) is fixed to the first side of the first bracket (11), and the first clamp (12) clamps the distillation flask (1).

4. The peony essential oil extraction device according to claim 1, characterized in that: The second clamp (13) is fixed to the second side of the first bracket (11), and the second clamp (13) clamps the U-shaped tube (7).

5. The peony essential oil extraction device according to claim 1, characterized in that: The third clamp (14) is fixed to the first side of the second bracket (15), and the third clamp (14) clamps the first end (81) of the separator.

6. The peony essential oil extraction device according to claim 1, characterized in that: The second end (82) of the separator is funnel-shaped, and a piston (16) is provided on the neck of the funnel-shaped; the bottom end of the funnel-shaped neck is the lower opening (19) of the separator.

7. The peony essential oil extraction device according to claim 1, characterized in that: The separator (8) contains n-hexane (9).

8. The peony essential oil extraction device according to claim 1, characterized in that: The bottom of the distillation flask (1) is arranged above the heater (17).

9. The peony essential oil extraction device according to claim 1, characterized in that: The top opening of the distillation flask (1) is sealedly connected to the first end (31) of the first curved pipe through a frosted pipe opening.

10. The peony essential oil extraction device according to claim 1, characterized in that: The second end (32) of the first curved pipe is sealedly connected to the first end (41) of the condenser pipe via a frosted pipe opening; The second end (42) of the condenser pipe is sealedly connected to the first end (51) of the second curved pipe via a frosted pipe opening; The second end (52) of the second curved pipe is sealedly connected to the first end (71) of the U-shaped pipe through a frosted pipe opening.

Images