Coconut natural product extraction process and coconut oil thereof

Abstract

The application provides a coconut natural product extraction process and coconut oil, and the extraction process comprises the following steps: step one, pretreating coconut oil raw materials; step two, cold pressing the coconut oil raw materials to obtain crude oil one and cold pressing cakes; step three, subcritically extracting the cold pressing cakes to obtain crude oil two, wherein the subcritical extraction solvent is n-butane, the subcritical extraction solvent temperature is 30-45 DEG C; and step four, filtering the mixture of the crude oil one and the crude oil two to obtain the coconut oil. The coconut oil is first cold pressed and then subcritically extracted, so that the extraction time is greatly shortened, the extraction efficiency is significantly improved, the extraction process is non-toxic, harmless, green, environmentally friendly and safe, the extraction process is non-thermal processing, the whole processing process is carried out in a low-temperature state, the components in the oil are not oxidized, the protein in the meal is not denatured, and the bioactivity of the effective components can be effectively preserved.

Description

Technical Field

[0001] This invention relates to a process for extracting natural coconut products and coconut oil, belonging to the field of coconut oil. Background Technology

[0002] Coconut oil is rich in medium-chain fatty acids, and is characterized by low calories, no cholesterol, easy absorption by the human body, and low conversion into fat storage. It also has good nutritional and health value, making it suitable for infants, young children, people recovering from surgery, and people with weak liver, gallbladder and gastrointestinal function. It is a recognized high-quality edible oil, and market demand continues to grow.

[0003] Currently, industrial coconut oil production primarily relies on cold pressing. While this method effectively preserves the oil's activity, it suffers from significant technical drawbacks: after traditional cold pressing, the residual oil content in the cold-pressed cake remains as high as 10%, resulting in insufficient oil extraction, low raw material utilization, directly increasing production costs, and wasting natural resources. Furthermore, existing coconut oil pretreatment equipment generally suffers from low automation, incomplete cleaning, uneven drying, easy clogging of the crushing and screening screens, and the inability to automatically return coarse materials. This leads to unstable raw material particle size and moisture content, affecting subsequent cold pressing efficiency and crude oil quality, while also increasing manual intervention and equipment maintenance costs.

[0004] Furthermore, conventional extraction processes suffer from problems such as high temperatures, significant solvent residue risks, and insufficient operational safety, making them difficult to efficiently match with cold pressing processes. They also cannot achieve efficient recovery of residual oil from cold-pressed cakes under low-temperature conditions. In summary, existing technologies cannot simultaneously meet the demands of high oil yield, high quality, continuous automation, and low loss in industrial production, thus hindering the efficient, green, and large-scale development of the coconut oil industry. Therefore, this invention proposes an industrial pretreatment process for extracting natural coconut products and the resulting coconut oil. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a process for extracting natural coconut products and the resulting coconut oil.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: A process for extracting natural coconut products includes the following steps: Step 1: Pre-treating the coconut oil raw material; Step 2: Cold-pressing the coconut oil raw material to obtain crude oil 1 and cold-pressed cake, and performing subcritical extraction on the cold-pressed cake to obtain crude oil 2, wherein the solvent for subcritical extraction is n-butane, and the temperature of the subcritical extraction solvent is 30℃-45℃; Step 3: Combining crude oil 1 and crude oil 2 and filtering to obtain coconut oil. In step one, the coconut oil raw material is coconut meat. The pretreatment includes a washing machine, a dryer, and a crusher. The washing machine washes the coconut meat, the dryer dries the washed coconut meat, and the crusher crushes and sieves the dried coconut meat. The crushed coconut meat is sieved through a 40-mesh sieve. The temperature of the dryer is 20℃-70℃, and the moisture content of the dried coconut oil raw material is less than 6%. In step two, the crushed coconut oil raw material is first steamed and roasted to obtain cooked material, and then cold-pressed in step three. The moisture content of the cooked material is 6%-7%, the steaming and roasting temperature is 30℃-60℃, the oil content of the cold-pressed cake is 6%-8%, and the number of cold pressings is 3-5 times. In step three, the number of subcritical extractions is 3-5 times, the subcritical extraction time is 40min-55min, the subcritical extraction pressure is 0.2MPa-0.7MPa, the liquid-to-material ratio of the subcritical extraction is 1.0-1.6:1, and the subcritical extraction includes a solvent evaporation and removal step, preferably vacuum evaporation.

[0007] Furthermore, the cleaning machine includes a water collection tank and a fixed cylinder integrally formed on the water collection tank. A cleaning drum is installed through the fixed cylinder. Bearings are fitted on the outer surfaces of both ends of the cleaning drum and are fixed to the outer walls of the fixed cylinder. A water spray pipe is installed inside the cleaning drum. A spiral conveying blade is also installed in the middle of the cleaning drum. A feed hood is installed on the outer wall of the fixed cylinder and is connected to the cleaning drum. A drive motor is fixed on one side of the outer wall of the feed hood. The output end of the drive motor is connected to the conveying rod of the spiral conveying blade. A collection hood corresponding to the tail of the cleaning drum is installed on the outer wall of the water collection tank. A bearing is fitted on the outer circumference of the spiral rod of the spiral conveying blade and is fixed to the outer wall of the feed hood. A drain pipe is also installed on the water collection tank.

[0008] Furthermore, the cleaning machine is tilted, and a transmission wheel is fixedly fitted at the head end of the cleaning drum. A second drive motor is installed at the top of the fixed drum. The output rod of the second drive motor is connected to a secondary transmission wheel. A transmission belt connects the transmission wheel and the secondary transmission wheel. A third bearing is fitted on the outer surface of the output rod of the second drive motor. A support rod is fixed between the bottom of the outer ring of the third bearing and the fixed drum.

[0009] Furthermore, filter assemblies are inserted into both outer walls of the water collection tank. The filter assemblies include double-layered filter frames, with a cross-shaped central frame fixed between the filter frames. Filter screens are provided on both the filter frames and the central frame. A mounting plate is fixed to one side of the filter frame. The mounting plate is fixed to the outer wall of the water collection tank with screws. Sealing gasket 1 and sealing gasket 2 are affixed to the mounting plate. A stepped mounting groove corresponding to the mounting plate is opened on the outer wall of the water collection tank.

[0010] Furthermore, the dryer includes a support frame, a drive mechanism on the support frame, a drying chamber connected to the drive mechanism that is slidably mounted on the support frame, a cover fixed to the top of the drying chamber with screws, a wire mesh rack fixed to the inside of the drying chamber with screws, an L-shaped plate fixed to the support frame, a through-feed pipe fixed to the L-shaped plate, a flexible hose in the middle of the feed pipe, the top of the feed pipe connected to the bottom of the collection hood and interconnected, the bottom of the feed pipe fixed to the top of the cover with screws, and a discharge port corresponding to the feed pipe opened on the cover.

[0011] Furthermore, the bottom of the drying chamber is equipped with multiple rollers, and the support frame is equipped with guide grooves that match the rollers. The drive mechanism includes a drive motor three mounted on the support frame. The output end of the drive motor three is connected to a meshing disc one. The support frame is rotatably connected to a meshing disc two via a bearing four. A transmission belt connects the meshing disc one and the meshing disc two. A drive rod connected to a bearing five is fixedly mounted on the meshing disc two. An eccentric rotating rod is fixedly mounted on the other end of the drive rod. A movable rod is rotatably connected to the eccentric rotating rod. The other end of the movable rod is rotatably connected to the drying chamber. Multiple telescopic rods are fixedly mounted between the support frame and the drying chamber.

[0012] Furthermore, a discharge frame is provided at the rear end of the drying oven, a blocking groove is provided at the top of the discharge frame, an electric telescopic rod is provided on the discharge frame, a blocking plate that passes through the blocking groove is connected to the output end of the electric telescopic rod, a soft rubber tube is provided in the middle of the discharge frame, a hot air blower is installed at the top of the oven cover, an exhaust pipe is connected to the outlet of the hot air blower and located on the corresponding placement mesh frame, and a drip groove is provided at the bottom of the drying oven.

[0013] Furthermore, the crusher includes a crushing tank with a lid. A drive motor is mounted on the top of the lid, and the output end of the drive motor has crushing blades located inside the crushing tank. A collection hood is installed on the outer wall of the crushing tank, communicating with the interior of the crushing tank. The bottom end of the discharge frame is connected to the collection hood. A screening box is located on one side of the crushing tank, with a door. The crushing tank has a downward-sloping discharge pipe that extends into the screening box. The bottom end of the discharge pipe inside the screening box is open. An inclined screening frame is supported inside the screening box. Four support members are installed between the screening frames by screws. The support members include a fixed mounting plate, and a return spring and a dustproof bellows are fixed between the mounting plates. The return spring is located inside the dustproof bellows. A setting plate is fixed on the outer wall of the screening box. Two drive rods are rotatably connected to the setting plate by bearings. One end of the drive rod passes into the screening box and is fixed with a beater plate. A dual-shaft motor is set on the setting plate. The output end of the dual-shaft motor is connected to one of the drive rods. Drive discs are fixed on the outer surface of the drive rods. A drive belt is connected between the drive discs. A conveyor cylinder is set on one side of the screening box.

[0014] Furthermore, the bottom of the conveying cylinder has a setting space, inside which a pair of meshing bevel gears are rotatably mounted via bearing seven. One bevel gear has a spiral conveying blade two located inside the conveying cylinder, and the other bevel gear has a through rod extending out of the conveying cylinder. The other output end of the dual-shaft motor is connected to the through rod. The bottom of the screening box has a final discharge port. An inclined connecting pipe connects the conveying cylinder and the crushing tank. A receiving cover corresponding to the screening frame is connected to the conveying cylinder, and the receiving cover and the conveying cylinder are interconnected.

[0015] The present invention also relates to coconut oil extracted using the coconut oil extraction process of the present invention.

[0016] The beneficial effects of this invention are: By dividing the pretreatment process into a washing machine, a drying machine, and a crusher, the entire process of washing, drying, crushing, screening, and material recycling is automated and continuous. The raw material for the overall pretreatment is coconut meat, which is cleaned, dried at low temperature, crushed and screened, then steamed and cold-pressed at low temperature to obtain crude oil 1. The coconut oil raw material is then cold-pressed to obtain crude oil 1 and cold-pressed cake. The cold-pressed cake is then subjected to subcritical extraction to obtain crude oil 2. Finally, crude oil 1 and crude oil 2 are combined and filtered to obtain high-purity coconut oil.

[0017] By first cold-pressing coconut oil and then performing subcritical extraction, the extraction time is significantly shortened and the extraction efficiency is greatly improved. The extraction process is non-toxic, environmentally friendly, and produces no pollutants, ensuring high safety. Furthermore, the extraction process is non-thermal and the entire process is carried out at low temperatures, preventing the oxidation of components in the oilseeds and the denaturation of proteins in the meal, thus effectively preserving the bioactivity of the active ingredients.

[0018] The double-layer filter on the washing machine finely filters the wastewater generated during washing. The eccentric drive on the dryer reciprocates and shakes the coconut meat, and with the addition of hot air and low-temperature drying, the coconut meat is evenly turned, without scorching, and the moisture content is stable. Finally, the crushing blade completes the crushing, and the unqualified coarse material is automatically fed back for further crushing, forming a closed loop.

[0019] Therefore, this invention has a higher oil yield, operates at low temperatures throughout the process to protect medium-chain fatty acids, avoids high-temperature oxidation, and automates the entire coconut meat pretreatment process, reducing manual intervention and labor intensity, and also reducing the overall environmental pollution caused by the work. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram illustrating the steps of a coconut natural product extraction process according to the present invention; Figure 2 This is a schematic diagram of the washing machine, drying machine, and crusher used in a coconut natural product extraction process according to the present invention. Figure 3 This is a schematic diagram of the cleaning drum in a coconut natural product extraction process according to the present invention; Figure 4 This is a schematic diagram of a spiral conveyor blade used in a coconut natural product extraction process according to the present invention. Figure 5 This is a schematic diagram of a filter component for a coconut natural product extraction process according to the present invention. Figure 6 This is a front view of a dryer for a coconut natural product extraction process according to the present invention; Figure 7 This is a schematic diagram of the position of the meshing disc in a coconut natural product extraction process according to the present invention. Figure 8 This is a schematic diagram of a crushing blade used in a coconut natural product extraction process according to the present invention. Figure 9 This is a schematic diagram of the inside of a screening box in a coconut natural product extraction process according to the present invention. Figure 10 This is a schematic diagram of a support component for a coconut natural product extraction process according to the present invention. Figure 11 This is a schematic diagram of the drive disk for a coconut natural product extraction process according to the present invention. Figure 12 This is a schematic diagram of the spiral conveyor blades in a coconut natural product extraction process according to the present invention.

[0022] In the diagram: 1. Water collection tank; 2. Fixed cylinder; 3. Cleaning drum; 4. Bearing 1; 5. Water spray pipe; 6. Spiral conveyor blade 1; 7. Feed hood; 8. Drive motor 1; 9. Bearing 2; 10. Transmission wheel; 11. Drive motor 2; 12. Secondary transmission wheel; 13. Transmission belt; 14. Bearing 3; 15. Drain pipe; 16. Filter frame; 17. Middle frame; 18. Filter screen; 19. Mounting platform; 20. Sealing gasket 1; 21. Sealing gasket 2; 22. Support frame; 23. Drying box; 24. Box cover; 25. Netting frame; 26. L-shaped plate; 27. Feed pipe; 28. Collection hood; 29. ​​Discharge port; 30. Roller; 31. Drive motor 3; 32. Meshing 33. Engaging Disc 1; 34. Drive Rod; 35. Eccentric Rotating Rod; 36. Movable Rod; 37. Telescopic Rod; 38. Discharge Frame; 39. Blocking Plate; 40. Hot Air Blower; 41. Crushing Tank; 42. Drive Motor 4; 43. Crushing Blades; 44. Concentrated Cover; 45. Screening Box; 46. Discharge Pipe; 47. Screening Frame; 48. Mounting Plate; 49. Return Spring; 50. Dustproof Corrugated Pipe; 51. Bearing 6; 52. Drive Rod; 53. Beating Plate; 54. Setting Plate; 55. Dual-Shaft Motor; 56. Drive Disc; 57. Conveying Cylinder; 58. Bevel Gear; 59. Spiral Conveying Blade 2; 60. Through Rod; 61. Connecting Pipe; 62. Receiving Cover. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figure 1This invention provides a process for extracting natural coconut products. The extraction process includes the following steps: Step 1: Pre-treating the coconut oil raw material; Step 2: Cold-pressing the coconut oil raw material to obtain crude oil 1 and cold-pressed cake, and performing subcritical extraction on the cold-pressed cake to obtain crude oil 2. The solvent for subcritical extraction is n-butane, and the subcritical extraction solvent temperature is 30℃-45℃; Step 3: Combining crude oil 1 and crude oil 2 and filtering to obtain coconut oil. In Step 1, the coconut oil raw material is coconut meat. The pre-treatment includes a washing machine, a dryer, and a crusher. The washing machine washes the coconut meat, the dryer dries the washed coconut meat, and the crusher crushes and sieves the dried coconut meat. The crushed coconut meat is then sieved through a 40-mesh sieve. The process is divided into three steps: First, the temperature of the dryer is 20℃-70℃, and the moisture content of the dried coconut oil raw material is less than 6%. Second, the crushed coconut oil raw material is first steamed and roasted to obtain cooked material, and then cold-pressed in step three. The moisture content of the cooked material is 6%-7%, the steaming and roasting temperature is 30℃-60℃, the oil content of the cold-pressed cake is 6%-8%, and the number of cold pressings is 3-5. In step three, the number of subcritical extractions is 3-5, the subcritical extraction time is 40min-55min, the subcritical extraction pressure is 0.2MPa-0.7MPa, the liquid-to-material ratio of the subcritical extraction is 1.0-1.6:1, and the solvent evaporation and removal step is included after subcritical extraction, preferably vacuum evaporation.

[0025] See Figure 2-5The cleaning machine includes a water collection tank 1 and a fixed cylinder 2 integrally formed on the water collection tank 1. A cleaning drum 3 is installed through the fixed cylinder 2. Bearings 4 are fitted on the outer surfaces of both ends of the cleaning drum 3 and are fixed to the outer walls of the fixed cylinder 2. A water spray pipe 5 is installed inside the cleaning drum 3. A spiral conveying blade 6 is also installed in the middle of the cleaning drum 3. A feed hood 7 is installed on the outer wall of the fixed cylinder 2 and communicates with the cleaning drum 3. A drive motor 8 is fixed on one side of the outer wall of the feed hood 7. The output end of the drive motor 8 is connected to the conveying rod of the spiral conveying blade 6. A collection hood 28 corresponding to the tail of the cleaning drum 3 is installed on the outer wall of the water collection tank 1. A bearing 9 is fitted on the outer circumference of the spiral rod of the spiral conveying blade 6. 9 is fixed on the outer wall of the feed hood 7. A drain pipe 15 is also provided on the water collection tank 1. The washing machine is inclined. A transmission wheel 10 is fixedly sleeved on the head end of the washing drum 3. A second drive motor 11 is installed on the top of the fixed cylinder 2. The output rod of the second drive motor 11 is connected to a secondary transmission wheel 12. A transmission belt 13 is connected between the transmission wheel 10 and the secondary transmission wheel 12. A bearing 14 is sleeved on the outer surface of the output rod of the second drive motor 11. A support rod is fixed between the bottom end of the outer ring of the bearing 14 and the fixed cylinder 2. Filter assemblies are inserted into both outer walls of the water collection tank 1. The filter assemblies include double-layer filter frames 16. A cross-shaped middle frame 17 is fixed between the filter frames 16. Filter screens 18 are provided on both the filter frames 16 and the middle frame 17. A mounting plate 19 is fixed to one side of the water collection tank 1 with screws. A sealing washer 20 and a sealing washer 21 are attached to the mounting plate 19. A stepped mounting groove corresponding to the mounting plate 19 is provided on the outer wall of the water collection tank 1. The washing drum 3 rotates, generating centrifugal force that causes the coconut meat to adhere to the inner wall of the washing drum 3 and rotate repeatedly. Simultaneously, the rotating spiral conveyor blades 6 transport the coconut meat during washing. During this process, the water spray pipe 5 continuously sprays water to clean the coconut meat, ensuring that all parts of the coconut meat are thoroughly cleaned. The washing drum 3 is tilted, with the entire washing drum 3 tilting upwards from the inlet end to the outlet end. The angle of inclination of the washing drum 3 is different from the horizontal direction. The angle is generally 10°-30°, so the actual conveying speed of the coconut meat is slower. This allows the coconut meat to spend more time inside the washing drum 3, resulting in a longer washing time and better cleaning effect. The conveying blades on the spiral conveyor blades 6 are also arranged inside the feed hood 7, ensuring the coconut meat inside the feed hood 7 is smoothly pushed into the washing drum 3. The entire system uses dual-power cleaning, with continuous water spraying to ensure the coconut meat surface is free of mud and impurities. The various bearings ensure stable operation, low noise, and long service life at corresponding connections. The double-layer filter frame, cross-bracing, and multi-layer filter screens intercept coconut meat fragments and mud, preventing drain pipe blockage. The filter components can be directly plugged in and removed; cleaning the filter screens does not require disassembling the entire machine, saving time and effort.The outer wall of the water collection tank 1 has a stepped mounting groove corresponding to the mounting platform 19. The stepped end of the mounting platform 19 is inserted into the stepped mounting groove on the outer wall of the water collection tank 1. At this time, the sealing gasket 20 is tightly attached to the inner wall of the stepped mounting groove, ensuring a tight seal, preventing water leakage and residue buildup, and keeping the workshop clean. The second sealing gasket 21 is directly attached between the mounting platform 19 and the outer wall of the water collection tank 1, serving as a double-installation filter component to prevent leakage of cleaning water. This overall setup reduces manual intervention and labor intensity, enabling thorough cleaning of the coconut meat and laying the foundation for subsequent drying, crushing, and cold pressing.

[0026] See Figure 2 , Figure 6 and Figure 7The dryer includes a support frame 22, on which a drive mechanism is mounted. A drying chamber 23, connected to the drive mechanism, is slidably mounted on the support frame 22. A cover 24 is fixed to the top of the drying chamber 23 with screws. A wire mesh rack 25 is fixed inside the drying chamber 23 with screws. An L-shaped plate 26 is fixed to the support frame 22. A feed pipe 27 is fixed through the L-shaped plate 26. The middle part of the feed pipe 27 is a flexible hose. The top of the feed pipe 27 is connected to the bottom of a collection hood 28, and they are interconnected. The bottom of the feed pipe 27 is fixed to the top of the cover 24 with screws. The cover 24 has a discharge port 29 corresponding to the feed pipe 27. The bottom of the drying chamber 23 is equipped with multiple rollers 30. The support frame 22 is provided with guide grooves matching the rollers 30. The drive mechanism includes... The system includes a drive motor 31 mounted on a support frame 22. The output end of the drive motor 31 is connected to a meshing disc 32. A meshing disc 33 is rotatably connected to the support frame 22 via a bearing 4. A transmission belt connects the meshing disc 32 and the meshing disc 33. A drive rod 34 connected to a bearing 5 is fixedly mounted on the meshing disc 33. An eccentric rotating rod 35 is fixedly mounted on the other end of the drive rod 34. A movable rod 36 is rotatably connected to the eccentric rotating rod 35. The other end of the movable rod 36 is rotatably connected to the drying chamber 23. Multiple telescopic rods 37 are fixedly mounted between the support frame 22 and the drying chamber 23. A discharge frame 38 is located at the tail end of the drying chamber 23. A blocking groove is opened at the top of the discharge frame 38. An electric telescopic rod is mounted on the discharge frame 38. The output end of the electric telescopic rod is connected to a through-hole... The blocking plate 39 of the blocking groove, the middle of the discharge frame 38 is a soft rubber tube, the top of the box cover 24 is equipped with a hot air blower 40, the air outlet of the hot air blower 40 is connected to an exhaust pipe located at the corresponding placement mesh frame 25, the bottom of the drying box 23 has a drip groove, and by setting the drying box 23 which can slide left and right on the support frame 22, the coconut meat on the placement mesh frame 25 inside the drying box 23 is shaken. The L-shaped plate 26 with a flexible feed pipe 27 connects the washing machine collection cover to the discharge port 29 of the drying box 23, thereby realizing uninterrupted and closed feeding of coconut meat after washing. The flexible feed pipe 27 in the middle is adapted to the sliding displacement of the drying box 23 to avoid the feeding pipe 27 being pulled or falling off, and the closed feeding prevents secondary contamination of the coconut meat, keeps the workshop clean, and thus achieves The current continuous production process from washing to drying reduces manual handling and improves efficiency. The mesh frame 25 provides a breathable bearing surface, preventing coconut meat from piling up and ensuring hot air penetration. The sliding drying box 23 provides the structural foundation for subsequent dynamic drying. The setup of the drive motor 31, drive rod 34, eccentric rotating rod 35, and movable rod, along with the rollers 30, guide chute, and telescopic rod 37, enables the drying box 23 to move back and forth. The eccentric mechanism drives the drying box 23 to move continuously left and right, allowing the coconut meat to slowly tumble on the mesh frame. The rollers 30 and guide chute reduce sliding friction, and the telescopic rod ensures smooth and stable movement. Ultimately, this achieves continuous tumbling of the coconut meat, preventing localized overheating and uneven drying, and avoiding the scorching and nutrient loss that can occur with static drying.The system operates within a low-temperature range of 20℃-70℃ to protect the activity of the oils. The hot air generated by the hot air blown onto the coconut meat is adjusted according to the actual quantity. The hot air blower is an existing component with existing heating settings, capable of accurately reaching the required heating temperature within a set time. An external controller manages the electrical components of this invention. The drip groove at the bottom of the drying chamber 23 corresponds to the blocking plate 39 for cleaning the coconut meat. Opening the blocking plate 39 allows the dried coconut meat to be finally discharged into the crusher via the discharge frame 38. The flexible discharge frame 38 is designed to accommodate the swinging motion of the drying chamber, preventing jamming. The drying process is designed to prevent material leakage, with fully automated feeding and discharging, reducing manual intervention and labor intensity. The discharged coconut meat is loose and has uniform moisture content, facilitating crushing and 40-mesh sieving. The hot air blower's outlet is connected to an exhaust duct corresponding to the placement mesh rack 25. The exhaust duct's outlets are arranged in a grid pattern, ensuring even airflow onto the mesh rack 25. The mesh rack 25 is angled downwards, but the angle is controlled between 0 and 10 degrees, preventing coconut meat from accumulating at the angled end. The angled arrangement of the mesh rack 25 also facilitates subsequent discharge of the coconut meat.

[0027] See Figure 2 and Figures 8-12The crusher includes a crushing tank 41 with a lid. A drive motor 42 is mounted on the top of the lid. The output end of the drive motor 42 has crushing blades 43 located inside the crushing tank 41. A collection cover 44 is mounted on the outer wall of the crushing tank 41, communicating with the interior of the crushing tank 41. The bottom end of a discharge frame 38 is connected to the collection cover 44. A screening box 45 is located on one side of the crushing tank 41, with a door. A downward-sloping discharge pipe 46 is located on the crushing tank 41, extending into the screening box 45. The bottom end of the discharge pipe 46 inside the screening box 45 is open. An inclined screening frame 47 is supported inside the screening box 45. Four supports are installed between the screening box 45 and the screening frame 47 by screws. The supporting components include a fixed mounting plate 48, with a return spring 49 and a dustproof bellows 50 fixed between the mounting plates 48. The return spring 49 is located inside the dustproof bellows 50. A setting plate 54 is fixed on the outer wall of the screening box 45. Two drive rods 52 are rotatably connected to the setting plate 54 via bearings 51. One end of each drive rod 52 passes into the screening box 45 and is fixedly fitted with a beater 53. A dual-shaft motor 55 is mounted on the setting plate 54. The output end of the dual-shaft motor 55 is connected to one of the drive rods 52. Drive discs 56 are fixed on the outer surface of each drive rod 52. A drive belt is connected between the drive discs 56. A conveyor cylinder 57 is located on one side of the screening box 45. The bottom of the conveyor cylinder 57 has a setting space. A setter is rotatably mounted inside the setting space via bearings 7. For the meshing bevel gears 58, one bevel gear 58 is equipped with a spiral conveying blade 59 located inside the conveying cylinder 57, and the other bevel gear 58 is equipped with a through rod 60 extending out of the conveying cylinder 57. The other output end of the dual-shaft motor 55 is connected to the through rod 60. The bottom of the screening box 45 has a final discharge port. An inclined connecting pipe 61 connects the conveying cylinder 57 and the crushing tank 41. A receiving cover 62 corresponding to the screening frame 47 is connected to the conveying cylinder 57. The receiving cover 62 and the conveying cylinder 57 are interconnected. A drive motor 42 and a crushing blade 43 are installed to form the crushing body. The discharge pipe 46 guides the crushed material into the inclined screening frame 47 inside the screening box 45. The screening frame 47 and the screening box 45 are connected by a mounting plate. A return spring provides support, and a dustproof corrugated pipe protects the return spring. A dual-shaft motor 55 drives a drive rod 52 and a striking plate 53 to vibrate the screening frame 47. A conveyor cylinder 57 is located on the outside of the screening box 45 to prepare for material return. The screening frame 47 is used to pass the crushed coconut meat through a 40-mesh sieve to meet the raw material particle size requirements before cold pressing. The uniform particle size ensures uniform steaming and frying, stable oil yield during cold pressing, and controllable residual oil rate. Ultimately, it achieves continuous crushing, automatic discharge, and screening without manual transfer. The inclined screening frame 47 and the striking vibration prevent coconut meat fibers from clogging the screen. The dustproof corrugated pipe wraps around the spring to prevent coconut powder adhesion and jamming, extending the spring's lifespan, thus ensuring continuous and stable material supply. Crushing and screening operate synchronously, providing uninterrupted supply of crushed material that meets the requirements.A pair of meshing bevel gears 58 are installed inside the conveyor cylinder 57. The other output end of the dual-shaft motor 55 is connected to a through rod 60, ultimately rotating the bevel gears 58, which in turn drives the rotation of the spiral conveyor blades 59. Unqualified coarse material on the screening frame 47 enters the conveyor cylinder 57 through the receiving cover 62. The spiral conveyor then sends the coarse material back to the crushing tank for secondary crushing through a connecting pipe, ultimately forming a closed-loop operation of crushing, screening, material return, and re-crushing. This achieves automatic return of unqualified material, eliminating the need for manual unloading and waste disposal, ensuring that all raw materials ultimately reach 40 mesh, maximizing raw material utilization, preventing coarse particles from entering the cold pressing stage, preventing blockage, equipment damage, uneven oil output, stabilizing the moisture and particle size of the cooked material, improving crude oil quality, and reducing residual oil rate.

[0028] This invention relates to coconut oil extracted using the coconut oil extraction process of this invention. The coconut oil obtained by this extraction process has high purity and excellent quality, meeting the requirements for cold-rolled coconut oil products.

[0029] In use, the pretreatment process is divided into a washing machine, a drying machine, and a crusher, thus achieving fully automated continuous production of the entire process, including washing, drying, crushing, screening, and material recycling. The raw material for the overall pretreatment is coconut meat, which is cleaned, dried at low temperature, crushed and screened, then steamed and cold-pressed at low temperature to obtain crude oil 1. The coconut oil raw material is then cold-pressed to obtain crude oil 1 and cold-pressed cake. The cold-pressed cake is then subjected to subcritical extraction to obtain crude oil 2. Finally, crude oil 1 and crude oil 2 are combined and filtered to obtain high-purity coconut oil. By first cold-pressing the coconut oil and then performing subcritical extraction, the extraction time is significantly shortened and the extraction efficiency is significantly improved. The extraction process is non-toxic, harmless, green, environmentally friendly, and highly safe. Furthermore, the extraction process is non-thermal processing, and the entire process... The process is carried out at low temperatures, preventing the oxidation of components in the oilseeds and the denaturation of proteins in the meal, thus effectively preserving the bioactivity of the active ingredients. The wastewater generated during washing is finely filtered through a double-layer filtration system on the washing machine. The coconut meat is eccentrically driven and reciprocated in the dryer, combined with hot air drying at low temperatures, ensuring even drying without scorching and maintaining stable moisture content. Finally, the pulverizing blades complete the pulverization, and unqualified coarse material is automatically returned for further pulverization, forming a closed-loop process of pulverization, screening, return, and re-pulverization. Therefore, this invention results in a higher oil yield, protects medium-chain fatty acids from high-temperature oxidation, and automates the entire coconut meat pretreatment process, reducing manual intervention and labor intensity, and minimizing overall environmental pollution.

[0030] 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. 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 process for extracting natural coconut products, characterized in that, The extraction process includes the following steps: Step 1: Pre-treat the coconut oil raw material; Step 2: Cold press the coconut oil raw material to obtain crude oil 1 and cold-pressed cake. Then, perform subcritical extraction on the cold-pressed cake to obtain crude oil 2. The solvent for subcritical extraction is n-butane, and the temperature of the subcritical extraction solvent is 30℃-45℃. Step 3: Combine crude oil one and crude oil two and filter them to obtain coconut oil; In step one, the coconut oil raw material is coconut meat. The pretreatment includes a washing machine, a dryer, and a crusher. The washing machine washes the coconut meat, the dryer dries the washed coconut meat, and the crusher crushes and sieves the dried coconut meat. The crushed coconut meat is sieved through a 40-mesh sieve. The temperature of the dryer is 20℃-70℃, and the moisture content of the dried coconut oil raw material is less than 6%. In step two, the crushed coconut oil raw material is first steamed and roasted to obtain cooked material, and then cold-pressed in step three. The moisture content of the cooked material is 6%-7%, the steaming and roasting temperature is 30℃-60℃, the oil content of the cold-pressed cake is 6%-8%, and the number of cold pressings is 3-5. In step three, the subcritical extraction is performed 3-5 times, the subcritical extraction time is 40-55 minutes, the subcritical extraction pressure is 0.2 MPa-0.7 MPa, the liquid-to-solid ratio is 1.0-1.6:1, and the solvent evaporation and removal step is included after subcritical extraction, preferably vacuum evaporation.

2. The coconut natural product extraction process according to claim 1, characterized in that, The cleaning machine includes a water collection tank (1) and a fixed cylinder (2) integrally formed on the water collection tank (1). A cleaning drum (3) is installed through the fixed cylinder (2). Bearings (4) are fitted on the outer surfaces of both ends of the cleaning drum (3). The bearings (4) are fixed on both sides of the outer wall of the fixed cylinder (2). A water spray pipe (5) is installed inside the cleaning drum (3). A spiral conveying blade (6) is also installed in the middle of the cleaning drum (3). A feed hood (7) is installed on the outer wall of the fixed cylinder (2). The material hood (7) and the washing drum (3) are connected. A drive motor (8) is fixed on one side of the outer wall of the material hood (7). The output end of the drive motor (8) is connected to the conveying rod of the spiral conveying blade (6). A collection hood (28) corresponding to the tail of the washing drum (3) is set on the outer wall of the water collection tank (1). A bearing (9) is sleeved on the outer circumference of the spiral rod of the spiral conveying blade (6). The bearing (9) is fixed on the outer wall of the material hood (7). A drain pipe (15) is also set on the water collection tank (1).

3. A coconut natural product extraction process according to claim 2, characterized in that, The cleaning machine is tilted. A transmission wheel (10) is fixedly sleeved at the head end of the cleaning drum (3). A second drive motor (11) is installed at the top of the fixed drum (2). The output rod of the second drive motor (11) is connected to a secondary transmission wheel (12). A transmission belt (13) is connected between the transmission wheel (10) and the secondary transmission wheel (12). A bearing (14) is sleeved on the outer surface of the output rod of the second drive motor (11). A support rod is fixed between the bottom of the outer ring of the bearing (14) and the fixed drum (2).

4. A coconut natural product extraction process according to claim 3, characterized in that, The outer walls of both sides of the water collection tank (1) are fitted with filter components. The filter components include double-layered filter frames (16). A cross-shaped middle frame (17) is fixed between the filter frames (16). Filter screens (18) are provided on both the filter frames (16) and the middle frame (17). A mounting plate (19) is fixed on one side of the filter frame (16). The mounting plate (19) is fixed to the outer wall of the water collection tank (1) with screws. Sealing gasket 1 (20) and sealing gasket 2 (21) are pasted on the mounting plate (19). A stepped mounting groove corresponding to the mounting plate (19) is opened on the outer wall of the water collection tank (1).

5. A coconut natural product extraction process according to claim 4, characterized in that, The dryer includes a support frame (22), a drive mechanism is provided on the support frame (22), a drying box (23) connected to the drive mechanism is slidably provided on the support frame (22), a box cover (24) is fixed to the top of the drying box (23) with screws, a mesh rack (25) is fixed to the inside of the drying box (23) with screws, an L-shaped plate (26) is fixed on the support frame (22), a feed pipe (27) is fixed through the L-shaped plate (26), the middle part of the feed pipe (27) is a flexible hose, the top of the feed pipe (27) is connected to the bottom of the collection cover (28) and they are interconnected, the bottom of the feed pipe (27) is fixed to the top of the box cover (24) with screws, and the box cover (24) has a corresponding feed port (29) for the feed pipe (27).

6. A coconut natural product extraction process according to claim 5, characterized in that, The bottom of the drying box (23) is provided with multiple rollers (30), and the support frame (22) is provided with guide grooves matching the rollers (30). The driving mechanism includes a third drive motor (31) set on the support frame (22). The output end of the third drive motor (31) is connected to a first meshing disc (32). The second meshing disc (33) is rotatably connected to the support frame (22) through a fourth bearing. A transmission belt is connected between the first meshing disc (32) and the second meshing disc (33). A drive rod (34) connected to a fifth bearing is fixedly provided on the second meshing disc (33). An eccentric rotating rod (35) is fixedly provided at the other end of the drive rod (34). A movable rod (36) is rotatably connected to the eccentric rotating rod (35). The other end of the movable rod (36) is rotatably connected to the drying box (23). Multiple telescopic rods (37) are fixedly provided between the support frame (22) and the drying box (23).

7. A coconut natural product extraction process according to claim 6, characterized in that, The drying box (23) is equipped with a discharge frame (38) at the tail end. A blocking groove is opened at the top of the discharge frame (38). An electric telescopic rod is provided on the discharge frame (38). A blocking plate (39) that passes through the blocking groove is connected to the output end of the electric telescopic rod. A soft rubber tube is in the middle of the discharge frame (38). A hot air blower (40) is installed at the top of the box cover (24). An exhaust pipe is connected to the air outlet of the hot air blower (40) located at the corresponding placement net frame (25). The bottom of the drying box (23) has a drip groove.

8. A process for the extraction of natural products from coconut according to claim 7, characterized by the fact that, The crusher includes a crushing tank (41), a lid is installed on the crushing tank (41), a drive motor (42) is installed on the top of the lid, the output end of the drive motor (42) is provided with crushing blades (43) located inside the crushing tank (41), a collection cover (44) is installed on the outer wall of the crushing tank (41), the collection cover (44) is connected to the inside of the crushing tank (41), and the bottom end of the discharge frame (38) is connected to the collection cover (44). A screening box (45) is provided on one side of the crushing tank (41), the screening box (45) has a door, the crushing tank (41) is provided with a downward inclined discharge pipe (46) that passes through the inside of the screening box (45), the bottom end of the discharge pipe (46) located inside the screening box (45) is open, and an inclined screening frame (47) is supported inside the screening box (45). The screening box (45) and the screening frame (47) Four support members are installed between the screws. The support members include the mounting plate (48) fixed. The mounting plate (48) is fixed with a return spring (49) and a dustproof corrugated pipe (50). The return spring (49) is located inside the dustproof corrugated pipe (50). The outer wall of the screening box (45) is fixed with a setting plate (54). The setting plate (54) is rotatably connected to two drive rods (52) through a bearing six (51). One end of the drive rod (52) is inserted into the screening box (45) and is fixed with a beater plate (53). The setting plate (54) is equipped with a dual-shaft motor (55). The output end of the dual-shaft motor (55) is connected to one of the drive rods (52). The outer surface of the drive rod (52) is fixed with a drive disc (56). The drive discs (56) are connected with a drive belt. The screening box (45) is equipped with a conveyor cylinder (57) on one side.

9. A process for the extraction of natural products from coconut according to claim 8, characterized by the fact that, The bottom of the conveying cylinder (57) has a setting space, and a pair of meshing bevel gears (58) are installed inside the setting space via bearing seven. One bevel gear (58) is provided with a spiral conveying blade (59) located inside the conveying cylinder (57), and the other bevel gear (58) is provided with a through rod (60) that passes through the conveying cylinder (57). The other output end of the dual-shaft motor (55) is connected to the through rod (60). The bottom of the screening box (45) has a final discharge port. An inclined connecting pipe (61) is connected between the conveying cylinder (57) and the crushing tank (41). A receiving cover (62) corresponding to the screening frame (47) is connected to the conveying cylinder (57), and the receiving cover (62) and the conveying cylinder (57) are interconnected.

10. A coconut oil characterized in that, It is prepared by the coconut natural product extraction process described in any one of claims 1-9.

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