Sarcandra glabra seed oil quality and efficiency improving method based on combination of wet-process and dry-process after-ripening treatment
By combining wet composting with heat pump drying, the problems of low oil yield and fatty acid damage in *Sarcandra glabra* seed oil have been solved, achieving efficient and high-quality production of *Sarcandra glabra* seed oil.
Patent Information
- Application Number
- CN202511842467.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-09
- Publication Date
- 2026-02-13
AI Technical Summary
Research and production of *Sarcandra glabra* seed oil have not been fully developed. Existing technologies have failed to effectively improve oil yield and linoleic acid content, and high-temperature treatment may damage unsaturated fatty acids.
A combined dry post-ripening treatment, which involves wet composting and heat pump drying, is used for preservation. This includes heat-insulating and moisture-retaining composting, low-temperature air heat pump drying, low-temperature pressing, and winterization treatment. It is combined with centrifugal filtration and winterization tanks to ensure the complete post-ripening process of *Sarcandra glabra* seeds.
It significantly improves the oil yield of *Sarcandra glabra* seeds, reduces the acid value and peroxide value of the oil, maintains the content of unsaturated fatty acids, reduces high-temperature damage, and improves the quality of *Sarcandra glabra* seed oil.
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Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the field of food processing, and discloses a quality improvement and efficiency enhancement method for Sarcandra glabra seed oil based on the combination of wet and dry post-ripening treatment, specifically discloses a quality improvement and efficiency enhancement method for Sarcandra glabra seed oil based on the combination of the wet post-ripening treatment of composting and the dry post-ripening treatment of post-heap drying and post-heap storage, and Sarcandra glabra seed oil obtained by the method. TECHNICAL BACKGROUND
[0002] There are many research and development results of Sarcandra glabra (Thunb.) Nakai in the industry, but the theoretical and application research on the seed oil of Sarcandra glabra is very little. There is no report on the production of Sarcandra glabra seed oil, and there is no related patent of Sarcandra glabra seed oil. The fruit of Sarcandra glabra is the mature fruit of Sarcandra glabra in Chloranthaceae, which is spherical or oval, about 3-4 mm in diameter, and bright red when mature. Sarcandra glabra is widely distributed in southern China and Southeast Asia, and the whole plant has medicinal value and is traditionally used for clearing heat and resolving toxins, promoting blood circulation and setting bones. The oil component of Sarcandra glabra seed has not been systematically studied, but fatty acids such as palmitic acid, oleic acid and linoleic acid, and volatile oil (content about 0.15%-0.20%) have been isolated from the whole plant. Sarcandra glabra seed contains up to 50% oil, of which linoleic acid accounts for more than 60%, which is comparable only to walnut kernel oil. Linoleic acid is a polyunsaturated fatty acid containing double bonds, which is widely believed to play an important role in human health and is an essential fatty acid. Its content is one of the important indicators of oil quality, and it also has important industrial applications.
[0003] At present, there is little research on Sarcandra glabra seed oil in the industry. Through research by the inventor, it is found that Sarcandra glabra seed has a significant post-ripening process, and the combination of composting wet post-ripening treatment and dry post-ripening treatment of post-heap drying and post-heap storage ensures the perfection of the post-ripening process of Sarcandra glabra seed, effectively improves the oil yield and linoleic acid content of Sarcandra glabra seed, and significantly increases the oil yield and reduces the oil acid value. SUMMARY
[0004] Based on the above analysis, the application proposes a method for improving the quality and efficiency of Sarcandra glabra seed oil based on the combination of composting wet post-ripening treatment and dry post-ripening treatment of post-heap drying and post-heap storage, which can effectively improve the oil yield of Sarcandra glabra seed, reduce the oil acid value and peroxide value.
[0005] In order to realize the above method, the application adopts the following technical scheme:
[0006] The application first discloses a quality improvement and efficiency enhancement method for Sarcandra glabra seed oil based on the combination of wet and dry post-ripening treatment, comprising:
[0007] (1) The Sarcandra glabra fruits are subjected to heat preservation and moisture preservation composting after-ripening treatment for 20-30 days to obtain preliminary after-ripened fruits;
[0008] (2) The preliminary after-ripened fruits are subjected to peeling, cleaning and disinfection treatment, and then subjected to dry after-ripening treatment to obtain after-ripened fruits;
[0009] (3) The after-ripened fruits are subjected to pressing treatment, and the obtained first pressing oil is subjected to preliminary filtration, winterization for a certain period of time, and centrifugal filtration to obtain a high-quality and high-efficiency Sarcandra glabra seed oil.
[0010] Further, the heat preservation and moisture preservation composting after-ripening treatment in step (1) is performed by any one of the following methods:
[0011] Method 1: The Sarcandra glabra fruits are spread on a plastic film, water is uniformly sprayed on the surface of the fruits to keep them moist, the fruits are covered with a plastic film, the composting temperature is controlled to be not more than 45℃, the fruits are turned over once every 5 days until the Sarcandra glabra fruit skin is completely blackened, and the heat preservation and moisture preservation composting after-ripening treatment is completed; or
[0012] Method 2: The Sarcandra glabra fruits are sprayed with water to keep them moist, then placed in a sealed container, covered with a rainproof cloth to keep them moist, and subjected to composting, with the storage temperature controlled to be not more than 45℃; the fruits are taken out and mixed every 4 days, then re-packed, until the Sarcandra glabra fruit skin is completely blackened, and the heat preservation and moisture preservation composting after-ripening treatment is completed.
[0013] Further, the thickness of the Sarcandra glabra fruits spread in method 1 is 10 cm±1 cm.
[0014] Further, the disinfection treatment in step (2) comprises: soaking the peeled Sarcandra glabra seeds in a 1-3% hydrogen peroxide solution for 1-5 min, taking out, washing with clean water for 1 min, and draining the clean water.
[0015] Further, the dry after-ripening treatment in step (2) comprises:
[0016] The dried seeds are stored in a cool and dry place for 2 months to complete the dry after-ripening treatment.
[0017] Further, the low-temperature air temperature is 20-45℃.
[0018] Further, the low-temperature pressing in step (3) comprises: adding the dried Sarcandra glabra seeds while hot into the pressing machine chamber for pressing, and maintaining the pressing temperature at 60-75℃ to obtain Sarcandra glabra seed first pressing oil.
[0019] Further, the preliminary filtration in step (3) adopts centrifugal treatment or plate and frame filtration.
[0020] Further, the centrifugal treatment comprises: centrifugal treatment of the obtained crude oil at a rotation speed of 4000-6000 r / min for 10-20 min.
[0021] Further, the winterization treatment in step (3) comprises: introducing the obtained primary filtered oil into a winterization tank at 0-8 DEG C for winterization treatment for 2-5 days.
[0022] The application further discloses a seed oil of Sarcandra glabra prepared by the seed oil upgrading and synergistic method of Sarcandra glabra.
[0023] The application further discloses application of the seed oil of Sarcandra glabra in production of edible oil, health-care products and medicines.
[0024] The application further discloses application of the seed oil of Sarcandra glabra as a raw material in production of linoleic acid.
[0025] The application has the following advantages:
[0026] (1) The application combines the wet post-ripening treatment and the heat pump drying treatment to accelerate and perfect the post-ripening process of the seed of Sarcandra glabra.
[0027] (2) The application uses hydrogen peroxide to disinfect the seed, so that the bacteria and other microorganisms on the surface of the seed can be basically killed, and the degradation product of the hydrogen peroxide is water, so that no harmful component is left.
[0028] (3) The application uses the heat pump drying treatment to the seed of Sarcandra glabra.
[0029] (4) The application uses the low-temperature pressing to reduce the damage of high temperature to the unsaturated fatty acid, especially the main component linoleic acid. DETAILED DESCRIPTION
[0030] In order to make the purpose, technical scheme and advantages of the application clearer, the application is further described in detail below with reference to specific examples.
[0031] Example 1
[0032] The grass coral seed oil upgrading and synergistic method based on the combination of wet and dry post-ripening treatment comprises:
[0033] (1) Fruit heap fermentation wet post-ripening treatment:
[0034] Spread the grass coral fruits on the plastic film with a thickness of about 10 cm, spray water on the surface to keep it moist, then cover the plastic film, and pay attention to the temperature not exceeding 45℃; turn them evenly once in about 5 days until the grass coral fruit skin is completely black, and complete the wet post-ripening treatment in 20-30 days.
[0035] (2) Cleaning and peeling: Put the grass coral fruits treated in step (1) into the peeling machine for peeling, and then clean and wash to obtain clean grass coral seeds, and drain the clean water.
[0036] (3) Disinfection: Put the grass coral seeds obtained in step (2) into 1-3% hydrogen peroxide solution, soak for 1-5 min, take out, rinse with clean water for 1 min, and dry.
[0037] (4) Dry post-ripening treatment: evenly place the grass coral seeds obtained in step (3) on the screen rack of the heat pump dryer, and the material thickness is about 2 cm. Set the low temperature air (30℃), air volume 4000m 3 / h, relative humidity 55%, start the dryer for drying, when the water content of the grass coral seeds reaches 7%, stop the drying operation, and take about grass coral seeds to a cool and dry place, and complete the subsequent dry post-ripening process in 2 months.
[0038] (5) Low temperature pressing: put the grass coral seeds treated in step (4) into the pressing machine chamber while hot for pressing, and the pressing temperature is maintained at 70℃, to obtain grass coral seed crude oil.
[0039] (6) Primary filtration: introduce the grass coral crude oil obtained in step (5) into the centrifugal filter for centrifugal separation treatment, the centrifugal machine speed is 4000 r / min, and the centrifugal separation time is 20 min, to obtain the grass coral seed primary filtration oil.
[0040] (7) Winterization: introduce the grass coral seed primary filtration oil obtained in step (6) into the winterization tank with a temperature of 0℃ for winterization treatment, and the time is 5 days.
[0041] (8) Centrifugal filtration: introduce the winterized oil obtained in step (7) into the centrifugal machine for centrifugal separation treatment, the centrifugal machine speed is 6000 r / min, and the centrifugal separation time is 20 min, to obtain the grass coral seed oil. The product is further refined according to various production purposes.
[0042] Example 2
[0043] The grass coral seed oil upgrading and synergistic method based on the combination of wet and dry post-ripening treatment comprises the following steps:
[0044] (1) Fruit compost post-ripening: after the grass coral fruit is sprayed with water, it is placed in a bag or other container, covered with a rainproof cloth to keep it moist, and composted, with the temperature not exceeding 45℃; after about 4 days, the fruit is poured out, mixed evenly, and placed in a bag again until the grass coral peel is completely black, and the wet post-ripening treatment is completed in 20-30 days.
[0045] (2) Cleaning and peeling: the grass coral fruit treated in step (1) is poured into a peeling machine for peeling, and after peeling and cleaning, clean grass coral seeds are obtained and drained.
[0046] (3) Disinfection: the grass coral seeds obtained in step (2) are placed in a 3% hydrogen peroxide solution for 1 min, taken out, washed with clean water for 1 min, and drained.
[0047] (4) Heat pump drying treatment: the grass coral seeds obtained in step (3) are evenly placed on the screen rack of a heat pump dryer, with a material thickness of about 2 cm. Set the low-temperature air (40℃), air volume 5000m 3 / h, relative humidity 65%, start the dryer for drying, and when the water content of the grass coral seeds reaches 8%, stop the drying operation, and take about grass coral seeds to a cool and dry place, and complete the subsequent dry post-ripening process in 2 months.
[0048] (5) Low-temperature pressing: the grass coral seeds obtained in step (4) are added into the chamber of a press while hot for pressing, with the pressing temperature maintained at 70℃, to obtain grass coral seed crude oil.
[0049] (6) Primary filtration: the grass coral crude oil obtained in step (5) is introduced into a centrifugal filter for centrifugal separation treatment, with the centrifugal filter speed being 6000r / min and the centrifugal separation time being 10 min, to obtain grass coral seed primary filtration oil.
[0050] (7) Winterization: the grass coral seed primary filtration oil obtained in step (6) is introduced into a winterization tank with a temperature of 8℃ for winterization treatment for 10 days.
[0051] (8) Centrifugal filtration: the winterized oil obtained in step (7) is introduced into a centrifuge for centrifugal separation treatment, with the centrifuge speed being 8000r / min and the centrifugal separation time being 10 min, to obtain grass coral seed oil. The product is further refined according to various production purposes.
[0052] Comparative Example 1
[0053] Traditional treatment
[0054] The raw material Sarcandra fruit was peeled, washed with clean water, and dried with hot air at 60-70°C until the moisture content was less than 8%. Then, the steps (5) to (8) in Example 1 were completed.
[0055] Comparative Example 2
[0056] Stacking treatment.
[0057] Compared with Example 1, the heat pump drying treatment was cancelled, the Sarcandra fruit was peeled after stacking, disinfected, washed with clean water, drained, dried with hot air at 60-70°C until the moisture content was less than 8%, and then the steps (5) to (8) in Example 1 were completed.
[0058] Comparative Example 3
[0059] Heat pump drying treatment
[0060] Compared with Example 1, the stacking treatment was cancelled, the raw material Sarcandra fruit was peeled, washed with clean water, and then the steps (4) to (8) in Example 1 were completed.
[0061] Test Example 1
[0062] (1) Oil quality detection
[0063] (1.1) The acid value, saponification value, iodine value and peroxide value of Sarcandra seed oil were determined according to GB / T 5510-2011, GB / T 5534-2008, GB / T 5532-2008 and GB 5009.227-2016.
[0064] (1.2) The fatty acid composition of oil was determined by gas chromatograph according to GB 5009.168-2016.
[0065] (2) Results
[0066] (2.1) Comparison of oil yield
[0067] The oil yields obtained by the four treatment methods are shown in Table 1.
[0068] Table 1 Comparison of oil yield of Sarcandra seed after pretreatment by four methods (%)
[0069]
[0070] From Table 1, the oil yield of Comparative Example 2 is increased by 7.04% than that of Comparative Example 1, and the difference is significant (P<0.05), which indicates that the composting post-ripening process is beneficial to the conversion of free fatty acid into oil, and the oil yield is increased. The oil yield of Comparative Example 3 is increased by 4.13% than that of Comparative Example 1, which indicates that the dry post-ripening process of heat pump drying treatment and cool dry storage is beneficial to the oil precipitation. The oil yield of Example 1 is increased by 9.64%, 5.51% and 2.60% than that of Comparative Example 1, Comparative Example 3 and Comparative Example 2 respectively, and the difference is significant, which indicates that the implementation of the present application can greatly improve the oil yield of S. halesiana seeds.
[0071] (2.2) Comparison of physicochemical properties of oil
[0072] The oils obtained by the four treatment methods have little difference in odor, color and fluidity, and the chemical properties are shown in Table 2.
[0073] Table 2 Comparison of chemical properties of S. halesiana seed oil after pretreatment by four methods
[0074]
[0075] From Table 2, the main difference of the chemical properties of S. halesiana seed oil treated by the four methods is the acid value and peroxide value, and the difference is significant (P<0.05). The acid value and peroxide value of Comparative Example 2 are decreased by 7.29 mg / g and 0.14 mol / kg than those of Comparative Example 1, and the difference is significant (P<0.05), which indicates that sand storage is beneficial to the conversion of free fatty acid into oil, and reduces the oxidation of oil. The acid value and peroxide value of Comparative Example 3 are decreased by 5.27 mg / g and 0.16 mol / kg than those of Comparative Example 1, and the difference is significant (P<0.05), which indicates that the composting wet post-ripening process is beneficial to the stabilization of acid value and the reduction of peroxide value. The acid value and peroxide value of Example 1 are decreased by 8.62 mg / g, 1.55 mg / g, 1.33 mg / g and 0.18 mol / kg, 0.04 mol / kg, 0.02 mol / kg than those of Comparative Example 1, Comparative Example 3 and Comparative Example 2 respectively, and the difference is significant (P<0.05), which indicates that the implementation of the present application can greatly improve the quality of S. halesiana seed oil.
[0076] (2.3) Comparison of fatty acid components
[0077] The fatty acid components of the Sarcandra glabra seed oil obtained by the four processing methods are different (Table 3). The unsaturated fatty acid content of the Sarcandra glabra seed oil is about 85%, mainly linoleic acid and oleic acid, especially the content of linoleic acid is as high as about 68%, which ranks first among the currently reported plant oils, and has great further development value. The combination of the compost wet curing treatment and the heat pump drying treatment promotes the combination of free fatty acids into fatty acid glycerides, and also promotes the conversion of saturated fatty acids into unsaturated fatty acids, thereby improving the oil yield and the unsaturated fatty acid content of the Sarcandra glabra seed oil.
[0078] Table 3 Comparison of fatty acid components and relative contents (%) of Sarcandra glabra seed oil after pretreatment by four methods
[0079]
[0080] In summary, the present application proposes the combination of the compost wet curing treatment and the heat pump drying treatment for the preservation of the dry curing treatment, which can help the Sarcandra glabra fruit to complete the curing process, thereby significantly increasing the oil yield, reducing the oil acid value and peroxide value, and improving the unsaturated fatty acid content. The low-temperature heat pump drying treatment process has low energy consumption, high efficiency and controllable drying process, can keep the seeds highly active, and ensures the dry curing process of the Sarcandra glabra seeds.
[0081] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application, and it should be understood that the above description is only for specific embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A method for improving the quality and efficiency of *Sarcandra glabra* seed oil based on a combination of wet and dry post-ripening treatments, including: (1) The fruits of the coral grass are subjected to heat preservation and moisture retention and composting for 20-30 days to obtain the pre-ripened fruits; (2) After peeling, washing and disinfecting, the pre-ripened fruit is subjected to dry ripening to obtain the ripened fruit; (3) After the ripened fruit is pressed, the virgin oil obtained is first filtered, and after winterization for a certain period of time, it is centrifuged and filtered to obtain a high-quality and high-efficiency Coralgrass seed oil.
2. The method for improving the quality and efficiency of *Sarcandra glabra* seed oil according to claim 1, wherein: The post-fermentation treatment of heat preservation and moisture retention in step (1) shall be carried out by any of the following methods: Method 1: Spread the *Sargassum fusiforme* fruits on a plastic film, spray water evenly on the fruit surface to keep it moist, cover the fruit with the plastic film, control the composting temperature to not exceed 45℃, turn the fruit over every 5 days until the *Sargassum fusiforme* fruit skin turns completely black, completing the heat-preserving and moisture-retaining composting ripening process; or Method 2: After spraying water to moisten the fruit of *Sarcandra glabra*, put it in a sealed container, cover it with a rainproof cloth to keep it moist, and pile it up for composting, controlling the storage temperature to not exceed 45℃; every 4 days, pour out the fruit, mix it evenly, and repack it until the peel of *Sarcandra glabra* turns completely black, which completes the heat preservation and moisture retention composting and ripening process.
3. The method for improving the quality and efficiency of *Sarcandra glabra* seed oil according to claim 2, wherein: The thickness of the *Sarcandra glabra* fruit spread out in Method 1 is 10cm ± 1cm.
4. The method for improving the quality and efficiency of *Sarcandra glabra* seed oil according to claim 1, wherein: The dry post-ripening treatment in step (2) includes: Low-temperature air heat pump drying was used to obtain dried seeds, which were then stored in a cool, dry place for 2 months to complete the dry ripening process.
5. The method for improving the quality and efficiency of *Sarcandra glabra* seed oil according to claim 4, wherein: The temperature of the low-temperature air is 20-45℃.
6. The method for improving the quality and efficiency of *Sarcandra glabra* seed oil according to claim 1, wherein: The initial filtration in step (3) is performed by centrifugation or plate and frame filtration.
7. The method for improving the quality and efficiency of *Sarcandra glabra* seed oil according to claim 6, wherein: The centrifugation process includes centrifuging the crude oil obtained from pressing at a speed of 4000-6000 r / min for 10-20 min.
8. The method for improving the quality and efficiency of *Sarcandra glabra* seed oil according to claim 1, wherein: The winterization treatment in step (3) includes: The obtained primary filtered oil is then transferred to a winterization tank at 0-8℃ for winterization treatment for 2-5 days.
9. A type of *Sarcandra glabra* seed oil prepared by the method for improving the quality and efficiency of *Sarcandra glabra* seed oil according to any one of claims 1-8.
10. The application of the *Sarcandra glabra* seed oil according to claim 9 in the production of edible oils, health products, pharmaceuticals, and in the extraction of linoleic acid.