Perfume lemon essential oil and preparation method thereof

Abstract

The invention particularly discloses perfume lemon essential oil and a preparation method thereof, and relates to the technical field of extraction of effective components of plants, and the preparation method of the perfume lemon essential oil comprises the following steps: cleaning perfume lemon peels, adding salt, and soaking for 0.5-1 hour; crushing the perfume lemon peel and the soaking solution together to form perfume lemon pulp; putting the perfume lemon pulp into an evaporator, setting the temperature of the evaporator to be 45-50 DEG C and the pressure to be 3500-4000 Pa, and performing vacuum distillation for 15-20 seconds to obtain oil-water mixed gas; feeding the oil-water mixed gas into a condenser, and condensing the oil-water mixed gas into oil-water mixed liquid at the temperature of 10-15 DEG C; and performing centrifugal separation at the centrifugal rotating speed of 8500-9000 rpm for 7-9 minutes at the centrifugal temperature of 80-100 DEG C to obtain the perfume lemon essential oil. According to the preparation method of the perfume lemon essential oil disclosed by the embodiment of the invention, the essential oil extraction rate is high, the product quality is high, and the fragrance is good.

Description

Technical Field

[0001] This invention relates to the field of plant active ingredient extraction technology, and in particular to a perfume lemon essential oil and its preparation method. Background Technology

[0002] Fragrant lemon is a hybrid citrus variety belonging to the Rutaceae family and the Citrus genus. It is a hybrid species resulting from the crossing of citron and semi-domesticated bitter orange. Fragrant lemons resemble regular lemons in appearance, but they have thinner peels, juicier flesh, and a lighter color, ranging from yellowish-green to orange-yellow. Their peels are smooth with prominent oil cells and possess a rich, aromatic fragrance.

[0003] Perfume lemon essential oil is a natural essential oil extracted from the peel of fresh perfume lemons. It has a fresh, citrus aroma, and its main components include limonene, γ-terpinene, and β-pinene. Due to its versatility, perfume lemon essential oil is widely used in various fields. In aromatherapy, it can be diffused or added to skincare products to uplift the spirit, relieve stress, improve mood, and enhance concentration. In personal care, it is used to whiten skin, improve acne, reduce oil secretion, and promote hair growth. In household cleaning, its natural antibacterial and deodorizing properties make it an ideal choice for cleaning agents, such as removing stains, eliminating odors, and purifying the air. In health support, it can be taken internally to aid digestion and boost immunity, while externally it can be used to relieve muscle pain and improve skin condition. However, current methods for extracting perfume lemon essential oil result in insufficient extraction rates, low product quality, and unpleasant aromas. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a method for producing perfume lemon essential oil, which results in a high essential oil extraction rate, high product quality, and a pleasant aroma.

[0005] The present invention also proposes a perfume lemon essential oil prepared by the above-described method for preparing perfume lemon essential oil.

[0006] A method for preparing perfume lemon essential oil according to an embodiment of the present invention includes: (1) Wash the fresh lemon peels thoroughly and soak them in salt water for 0.5 to 1 hour; (2) The lemon peel and the soaking solution are crushed together to form lemon pulp; (3) Place the perfume lemon pulp into an evaporator, set the temperature of the evaporator to 45 to 50°C and the pressure to 3500 to 4000 Pa, and perform vacuum distillation for 15 to 20 seconds to obtain an oil-water mixture gas. (4) The oil-water mixture gas is fed into a condenser and condensed into an oil-water mixture liquid at a temperature of 10 to 15°C; (5) The obtained oil-water mixture is centrifuged at a speed of 8500 to 9000 rpm, a time of 7 to 9 minutes, and a temperature of 80 to 100°C to obtain perfume lemon essential oil.

[0007] The method for producing perfume lemon essential oil according to embodiments of the present invention has at least the following beneficial effects: Perfume lemons have obvious oil cells on their surface, resulting in a rich aroma. The essential oil in the perfume lemon pulp formed by washing and soaking fresh perfume lemon peels in salt water and then crushing them together is more easily extracted in subsequent processes. After the perfume lemon pulp is placed in an evaporator, the essential oil is extracted, yielding an oil-water mixture. This mixture is then sent to a condenser, where it condenses into an oil-water liquid mixture. Subsequently, centrifugal separation efficiently separates the water and essential oil. The entire production process has high essential oil extraction efficiency, resulting in high-quality perfume lemon essential oil with a pleasant aroma.

[0008] According to one embodiment of the present invention, the centrifugation separation in step (5) is divided into a first centrifugation separation and a second centrifugation separation. The centrifugation speed is 8500 to 9000 rpm, the centrifugation time is 7 to 9 minutes, and the centrifugation temperature is 80 to 100°C. The second centrifugation separation is performed immediately after the first centrifugation separation to obtain perfume lemon essential oil.

[0009] According to one embodiment of the present invention, the centrifugation speed of the first centrifugation separation is 8500 rpm, the centrifugation time is 9 minutes, and the centrifugation temperature is 100°C; the centrifugation speed of the second centrifugation separation is 9000 rpm, the centrifugation time is 7 minutes, and the centrifugation temperature is 80°C.

[0010] According to one embodiment of the present invention, the salt in step (1) is NaCl, KCl, CaCl2 or MgCl2.

[0011] According to one embodiment of the present invention, the evaporator in step (3) is a rotary thin-film evaporator. After the perfume lemon pulp is vacuum distilled for 15 to 20 seconds at a temperature of 45 to 50°C and a pressure of 3500 to 4000 Pa, the oil-water mixture is obtained through the vacuum system pipeline at the upper end of the rotary thin-film evaporator.

[0012] According to one embodiment of the present invention, the condenser in step (4) is a conical condenser, which contains purified water at a constant temperature of 10 to 15°C. After the oil-water mixture is fed into the conical condenser, it is condensed into the oil-water mixture liquid at a temperature of 10 to 15°C.

[0013] According to one embodiment of the present invention, in step (2), the lemon peel and the soaking solution are put together into a pulverizer and crushed to form the lemon pulp, and then the lemon pulp is put into a non-metallic container.

[0014] The perfume lemon essential oil according to an embodiment of the present invention comprises perfume lemon and salt, and is prepared by the method for preparing perfume lemon essential oil according to an embodiment of the present invention.

[0015] The perfume lemon essential oil according to embodiments of the present invention has at least the following beneficial effects: high quality and good aroma.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a flowchart illustrating a method for preparing perfume lemon essential oil according to an embodiment of the present invention. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, inside, outside, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0020] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0021] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0022] Fragrant lemon is a hybrid citrus variety belonging to the Rutaceae family and the Citrus genus. It is a hybrid species resulting from the crossing of citron and semi-domesticated bitter orange. Fragrant lemons resemble regular lemons in appearance, but their peel is thinner, their flesh is juicier, and their color is lighter, ranging from yellowish-green to orange-yellow. Their peel is smooth with prominent oil cells and a rich aroma. The flesh of the fragrant lemon is tender and pale yellow, abundant in juice, and has a sweet taste without any bitterness, hence the name "fragrant lemon." Fragrant lemons are rich in vitamin C, which has powerful antioxidant properties, boosting immunity and promoting overall health. Furthermore, they contain various trace elements and vitamins, making them highly nutritious.

[0023] Perfume lemon essential oil is a natural essential oil extracted from the peel of fresh perfume lemons. It has a fresh, citrus aroma, and its main components include limonene, γ-terpinene, and β-pinene. Due to its versatility, perfume lemon essential oil is widely used in various fields. In aromatherapy, it can be diffused or added to skincare products to uplift the spirit, relieve stress, improve mood, and enhance concentration. In personal care, it is used to whiten skin, improve acne, reduce oil secretion, and promote hair growth. In household cleaning, its natural antibacterial and deodorizing properties make it an ideal choice for cleaning agents, such as removing stains, eliminating odors, and purifying the air. In health support, it can be taken internally to aid digestion and boost immunity, while externally it can be used to relieve muscle pain and improve skin condition. However, current methods for extracting perfume lemon essential oil result in insufficient extraction rates, low product quality, and unpleasant aromas.

[0024] Therefore, this invention proposes a method for preparing perfume lemon essential oil, as detailed in the accompanying drawings. Figure 1 As shown.

[0025] Reference Figure 1 As shown, a method for preparing perfume lemon essential oil according to an embodiment of the present invention includes: (1) Wash the fresh lemon peels thoroughly and soak them in salt water for 0.5 to 1 hour; (2) Crush the lemon peel together with the soaking solution to form lemon pulp; (3) Place the perfume lemon pulp into the evaporator, set the evaporator temperature to 45 to 50°C and the pressure to 3500 to 4000 Pa, and perform vacuum distillation for 15 to 20 seconds to obtain an oil-water mixture gas. (4) The oil-water mixture is fed into a condenser and condensed into an oil-water mixture at a temperature of 10 to 15°C; (5) The obtained oil-water mixture is centrifuged at a speed of 8500 to 9000 rpm, a centrifugation time of 7 to 9 minutes, and a centrifugation temperature of 80 to 100°C to obtain perfume lemon essential oil.

[0026] It should be noted that cleaning the fresh lemon peel is to remove dirt from the peel and ensure food hygiene and safety. Additionally, soaking in salt water in step (1) mainly serves to salt out the lemons, making it easier to extract the essential oil from the lemon peel. It should be noted that the salt in step (1) is NaCl (sodium chloride), KCl (potassium chloride), CaCl2 (calcium chloride), or MgCl2 (magnesium chloride). It is understood that using these salts can effectively utilize the salting-out effect and improve the extraction rate of lemon essential oil. In one embodiment, the salt in step (1) is NaCl (sodium chloride); in another embodiment, the salt in step (1) is KCl (potassium chloride); in yet another embodiment, the salt in step (1) is CaCl2 (calcium chloride); and in yet another embodiment, the salt in step (1) is MgCl2 (magnesium chloride).

[0027] It should be noted that soaking in salt for 0.5 to 1 hour ensures that the added salt fully exerts its salting-out effect. In one embodiment, the fresh lemon peel is washed and soaked in salt for 0.5 hours; in another embodiment, the fresh lemon peel is washed and soaked in salt for 0.6 hours; in another embodiment, the fresh lemon peel is washed and soaked in salt for 0.7 hours; in another embodiment, the fresh lemon peel is washed and soaked in salt for 0.8 hours; in another embodiment, the fresh lemon peel is washed and soaked in salt for 0.9 hours; and in another embodiment, the fresh lemon peel is washed and soaked in salt for 1 hour.

[0028] It should be noted that in step (2), after the lemon peel and the soaking solution are crushed together to form lemon pulp, the salting-out effect of the salt is further enhanced, making it easier to extract the essential oil from the lemon peel. In one embodiment, in step (2), the lemon peel and the soaking solution are crushed together in a grinder to form lemon pulp, and then the lemon pulp is placed in a non-metallic container. It is understood that placing the lemon pulp in a non-metallic container makes it easy to place in the evaporator and condenser, and ensures that the extracted lemon essential oil has a pure aroma. In one embodiment, the non-metallic container is a beaker; in another embodiment, the non-metallic container is a ceramic container; in yet another embodiment, the non-metallic container is a plastic vessel.

[0029] In one embodiment of the present invention, a method for producing perfume lemon essential oil is described. In step (3), the evaporator is a rotary thin-film evaporator. After the perfume lemon pulp is vacuum distilled for 15 to 20 seconds at a temperature of 45 to 50°C and a pressure of 3500 to 4000 Pa, an oil-water mixture is obtained through the vacuum system pipeline at the upper end of the rotary thin-film evaporator. It is understood that using a rotary thin-film evaporator can improve evaporation efficiency and easily obtain an oil-water mixture.

[0030] In one embodiment, the evaporator temperature is set to 45°C, the pressure to 3500 Pa, and the vacuum distillation time to 15 seconds; in another embodiment, the evaporator temperature is set to 46°C, the pressure to 3600 Pa, and the vacuum distillation time to 16 seconds; in another embodiment, the evaporator temperature is set to 47°C, the pressure to 3700 Pa, and the vacuum distillation time to 17 seconds; in another embodiment, the evaporator temperature is set to 48°C, the pressure to 3800 Pa, and the vacuum distillation time to 18 seconds; in another embodiment, the evaporator temperature is set to 49°C, the pressure to 3900 Pa, and the vacuum distillation time to 19 seconds; in yet another embodiment, the evaporator temperature is set to 50°C, the pressure to 4000 Pa, and the vacuum distillation time to 20 seconds.

[0031] In one embodiment of the present invention, a method for producing perfume lemon essential oil is described. In step (4), the condenser is a conical condenser containing purified water at a constant temperature of 10 to 15°C. The oil-water mixture is fed into the conical condenser and condenses into an oil-water mixture liquid at a temperature of 10 to 15°C. It is understood that using a conical condenser improves condensation efficiency and facilitates the production of the oil-water mixture liquid. In one embodiment, the water temperature is constant at 10°C; in another embodiment, it is constant at 11°C; in another embodiment, it is constant at 12°C; in another embodiment, it is constant at 13°C; in another embodiment, it is constant at 14°C; and in another embodiment, it is constant at 15°C.

[0032] In one embodiment of the present invention, a method for producing perfume lemon essential oil includes a centrifugal separation process in step (5) consisting of a first centrifugal separation and a second centrifugal separation. The centrifugal speed for both processes is 8500 to 9000 rpm, the centrifugal time is 7 to 9 minutes, and the centrifugal temperature is 80 to 100°C. The second centrifugal separation is performed immediately after the first centrifugal separation to obtain perfume lemon essential oil. It is understood that by setting up two centrifugal separation processes, water and perfume lemon essential oil can be fully separated, resulting in perfume lemon essential oil of higher quality and better aroma.

[0033] In one embodiment, the first centrifugation is performed at a speed of 8500 rpm for 9 minutes at a temperature of 100°C, and the second centrifugation is performed at a speed of 9000 rpm for 7 minutes at a temperature of 80°C. In another embodiment, the first centrifugation is performed at a speed of 8600 rpm for 8 minutes at a temperature of 95°C, and the second centrifugation is performed at a speed of 8900 rpm for 8 minutes at a temperature of 85°C. In yet another embodiment, the first centrifugation is performed at a speed of 8700 rpm for 7 minutes at a temperature of 90°C, and the second centrifugation is performed at a speed of 8800 rpm for 9 minutes at a temperature of 90°C. In yet another embodiment, the first centrifugation is performed at a speed of 8800 rpm for 9 minutes at a temperature of 100°C, and the second centrifugation is performed at a speed of 8700 rpm for 7 minutes at a temperature of 95°C.

[0034] This invention also proposes a fragrant lemon essential oil, the formulation of which includes fragrant lemon and salt, and is prepared by the method for preparing fragrant lemon essential oil according to embodiments of this invention. It is understood that the prepared fragrant lemon essential oil is of high quality and has a pleasant aroma.

[0035] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for producing perfume lemon essential oil, characterized in that, include: (1) Wash the fresh lemon peels thoroughly and soak them in salt water for 0.5 to 1 hour; (2) The lemon peel and the soaking solution are crushed together to form lemon pulp; (3) Place the perfume lemon pulp into an evaporator, set the temperature of the evaporator to 45 to 50°C and the pressure to 3500 to 4000 Pa, and perform vacuum distillation for 15 to 20 seconds to obtain an oil-water mixture gas. (4) The oil-water mixture gas is fed into a condenser and condensed into an oil-water mixture liquid at a temperature of 10 to 15°C; (5) The obtained oil-water mixture is centrifuged at a speed of 8500 to 9000 rpm, a time of 7 to 9 minutes, and a temperature of 80 to 100°C to obtain perfume lemon essential oil.

2. The method for preparing perfume lemon essential oil according to claim 1, characterized in that, The centrifugation separation in step (5) is divided into a first centrifugation separation and a second centrifugation separation. The centrifugation speed is 8500 to 9000 rpm, the centrifugation time is 7 to 9 minutes, and the centrifugation temperature is 80 to 100℃. The second centrifugation separation is performed immediately after the first centrifugation separation to obtain perfume lemon essential oil.

3. The method for preparing perfume lemon essential oil according to claim 2, characterized in that, The first centrifugation was performed at a speed of 8500 rpm for 9 minutes at a temperature of 100°C. The second centrifugation was performed at a speed of 9000 rpm for 7 minutes at a temperature of 80°C.

4. The method for preparing perfume lemon essential oil according to claim 1, characterized in that, The salt mentioned in step (1) is NaCl, KCl, CaCl2 or MgCl2.

5. The method for preparing perfume lemon essential oil according to claim 1, characterized in that, The evaporator mentioned in step (3) is a rotary thin-film evaporator. After the perfume lemon pulp is vacuum distilled for 15 to 20 seconds at a temperature of 45 to 50°C and a pressure of 3500 to 4000 Pa, the oil-water mixture is obtained through the vacuum system pipeline at the upper end of the rotary thin-film evaporator.

6. The method for preparing perfume lemon essential oil according to claim 1, characterized in that, The condenser mentioned in step (4) is a conical condenser. The conical condenser contains clean water with a constant water temperature of 10 to 15°C. After the oil-water mixture is sent into the conical condenser, it condenses into the oil-water mixture liquid at a temperature of 10 to 15°C.

7. The method for preparing perfume lemon essential oil according to claim 1, characterized in that, In step (2), the lemon peel and the soaking solution are put into a grinder together and crushed to form lemon pulp. The lemon pulp is then placed in a non-metallic container.

8. A perfume lemon essential oil, characterized in that, The formula comprises perfume lemon and salt, and is made by the method of making perfume lemon essential oil as described in any one of claims 1 to 7.

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