Production method of high-quality cold-pressed sesame oil
By combining magnetic separation, vibrating screen, and gravity destoner for screening and multi-stage fine filtration, along with segmented cold pressing and nitrogen-filled storage, the problems of raw material pretreatment and filtration are solved, resulting in high oil yield and long shelf life of high-quality cold-pressed sesame oil.
Patent Information
- Application Number
- CN202511269363.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-08
- Publication Date
- 2025-11-18
AI Technical Summary
In existing high-quality cold-pressed sesame oil production methods, it is difficult to completely remove impurities during raw material pretreatment, resulting in low oil yield and poor filtration, which leads to insufficient sesame oil quality and shelf life.
The process employs a combination of magnetic separation, vibrating screen, and gravity destoner for screening, along with segmented cold pressing and multi-stage fine filtration to control moisture and temperature. The press is cooled by water and stored in nitrogen to ensure the purity of the raw materials and the clarity of the oil.
It increases oil yield, significantly improves the clarity and shelf life of sesame oil, reduces impurity content, and has good market application prospects.
Smart Images
Figure CN120966548A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of cold-pressed sesame oil, in particular to a production method of high-quality cold-pressed sesame oil. BACKGROUND
[0002] Sesame oil, also known as fragrant oil, is a kind of edible oil with rich aroma and nutrition. As a kind of edible oil with unique flavor and rich nutritional value, sesame oil is deeply loved by consumers. With the continuous improvement of consumers' requirements for food quality and safety, cold-pressing technology has gradually attracted attention. Cold-pressing is carried out under low temperature conditions, which can better preserve the nutritional ingredients and aroma substances in sesame.
[0003] The white sesame or black sesame purchased is removed of impurities, the sesame removed of impurities is softened and plasticized, the softened sesame is cold-pressed in sections, the cold-pressed crude oil is filtered, then the crude oil is finely filtered, and the filtered sesame oil is stored in a light-proof container for aging, and finally the sesame finished oil is obtained.
[0004] The existing production method of high-quality cold-pressed sesame oil has the problems that in the raw material pretreatment link, the ordinary cleaning and drying method is difficult to completely remove the impurities and microorganisms on the surface of sesame, affecting the quality and shelf life of sesame oil, in the cold-pressing process, due to the tight structure of sesame cell wall, the conventional pressing method has low oil yield, and it is difficult to ensure efficient pressing at low temperature, in the filtering link, the ordinary filtering method cannot effectively remove the small impurities and colloidal substances in the oil, resulting in poor clarity and stability of the cold-pressed sesame oil, therefore, the present application provides a production method of high-quality cold-pressed sesame oil. SUMMARY
[0005] (1) Technical problems solved
[0006] In view of the above problems existing in the prior art, the present application provides a production method of high-quality cold-pressed sesame oil.
[0007] (2) Technical scheme
[0008] In order to achieve the above purpose, the present application is implemented by the following technical scheme: a production method of high-quality cold-pressed sesame oil, comprising the following steps:
[0009] S1, screening process: first, magnetic separation is carried out to remove ferromagnetic impurities; then, vibration screening is carried out to remove large impurities, grass stems and dust; then, a specific gravity stone removal machine is used to remove stone, grass, dust and other impurities; then, first screening, stone removal, second screening and magnetic separation are carried out in sequence to further remove impurities;
[0010] S2, raw material conditioning process: the moisture content of sesame is adjusted to 5-8%, and the temperature is adjusted to 40-60℃, so that the plasticity of sesame is increased, and the yield of sesame is improved.
[0011] S3, a pressing process: the conditioned sesame is sent into a low-temperature press with a core water cooling function to sequentially perform first pressing, second pressing and third pressing, so as to press the sesame into oil; wherein, the sesame is first pressed into a embryo, a small amount of oil is extracted to increase the plasticity of the sesame, and then the second pressing and the third pressing are sequentially performed to extract oil, so that the oil extraction rate is increased to 47-49%;
[0012] S4, a multi-stage precision filtering process:
[0013] primary filtration: the cold-pressed sesame oil is filtered through a filter with a mesh size of more than 100 meshes to remove impurities;
[0014] precision filtration: the semi-finished product after the primary filtration is cooled to 5-10℃, and is filtered through a precision filter with a pore size of less than 15 microns at a filtration pressure of less than 0.2 MPa, so as to obtain clear and transparent cold-pressed sesame oil;
[0015] S5, a storage process: the precision-filtered sesame oil is stored in a stainless steel storage tank after being filled with nitrogen.
[0016] As a preferred scheme of the production method of the high-quality cold-pressed sesame oil, the impurity content is controlled to be ≤0.5%.
[0017] As a preferred scheme of the production method of the high-quality cold-pressed sesame oil, the vibration frequency of the vibrating screen is 30-50 Hz, the amplitude is 5-10 minutes, the working wind speed of the specific gravity stone removing machine is 3-5 m / s, and the stone removing time is 3-5 minutes.
[0018] As a preferred scheme of the production method of the high-quality cold-pressed sesame oil, the moisture adjustment adopts a spray humidification mode, and the temperature adjustment adopts a constant temperature heating device for heating.
[0019] As a preferred scheme of the production method of the high-quality cold-pressed sesame oil, the cooling water temperature of the core water cooling function of the press is 15-25℃, and the cooling water flow rate is 2-5 L / min.
[0020] As a preferred scheme of the production method of the high-quality cold-pressed sesame oil, the whole process temperature during the pressing is controlled to be ≤45℃, the double-screw low-temperature press is a three-stage pressurization type press, the pressure of the first pressing is 10-15 MPa, and the pressing time is 5-8 minutes; the pressure of the second pressing is 15-20 MPa, and the pressing time is 8-12 minutes; the pressure of the third pressing is 20-25 MPa, and the pressing time is 12-15 minutes.
[0021] As a preferred scheme of the production method of the high-quality cold-pressed sesame oil, in the multi-stage precision filtering process, the filter used in the primary filtering is a plate-and-frame filter, and the precision filter used in the precision filtering is a membrane filter.
[0022] As a preferred scheme of the production method of the high-quality cold-pressed sesame oil, in the multi-stage precision filtering process, the pore size of the precision filter is 10-15 microns.
[0023] As a preferred scheme of the production method of the high-quality cold-pressed sesame oil, in the nitrogen filling, the purity of the nitrogen is ≥99.99%, and the nitrogen filling pressure is 0.1-0.3 MPa.
[0024] (III) Beneficial Effects
[0025] The application provides a production method of high-quality cold-pressed sesame oil.
[0026] 1. In the whole production process, various impurities in the sesame can be efficiently removed through multiple screening processes, and the combination of magnetic separation, vibrating screen, specific gravity stone removal machine and multiple screening and magnetic separation operations can ensure the purity of the raw materials, spray humidification and constant temperature heating are used for raw material conditioning, and the moisture content and temperature parameters are accurately controlled, so that the plasticity of the sesame is improved, and the yield is improved.
[0027] 2. In the pressing process, the segmented cold pressing, primary pressing and secondary pressing are combined, and the press with the core water cooling function is used, so that the oil pressing effect and the oil yield are effectively guaranteed, and the multi-stage precision filtering is used to control the filtering equipment, the temperature, the pore size and the pressure, so that the clarity of the sesame oil is significantly improved.
[0028] 3. Nitrogen filling treatment is performed during storage, and the sesame oil is stored in a stainless steel storage tank, so that the oxidation of the sesame oil is effectively delayed, and the shelf life is prolonged. BRIEF DESCRIPTION OF DRAWINGS
[0029] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.
[0030] Figure 1 is a flowchart of the production method of the application. DETAILED DESCRIPTION
[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
[0032] Embodiment 1
[0033] The embodiment provides a production method of high-quality cold-pressed sesame oil, comprising the following steps:
[0034] S1, pour the sesame into a magnetic separation device with a magnetic field strength of 8000Gs, and perform magnetic separation on the sesame for 2 minutes to remove ferromagnetic impurities; then, feed the sesame after the magnetic separation into a vibrating screen with a vibration frequency of 30Hz and an amplitude of 5mm, and perform screening for 3 minutes to remove large impurities, grass stems, dust and other impurities; then, feed the sesame after the screening into a specific gravity stone removing machine with a working wind speed of 3m / s, and perform stone removing for 3 minutes to remove stones, grass leaves, dust and other impurities.
[0035] Then, sequentially perform the following operations: first screening (the parameters of the vibrating screen are the same as before, and the screening time is 3 minutes), stone removing (the parameters of the specific gravity stone removing machine are the same as before, and the stone removing time is 3 minutes), second screening (the parameters of the vibrating screen are the same as before, and the screening time is 3 minutes), and magnetic separation (the parameters of the magnetic separation device are the same as before, and the magnetic separation time is 2 minutes), to further remove impurities.
[0036] S2, use a spray humidifying device with a spray amount of 0.5L / min to adjust the moisture content of the sesame to 5%, and use a constant temperature heating device with a heating power of 5kW to adjust the temperature of the sesame to 40℃, and heat for 10 minutes to increase the plasticity of the sesame.
[0037] S3, feed the conditioned sesame into a low-temperature press with a water-cooled core, and sequentially perform first pressing (pressure: 10MPa, pressing time: 5 minutes), second pressing (pressure: 15MPa, pressing time: 8 minutes) and third pressing (pressure: 20MPa, pressing time: 12 minutes).
[0038] First pressing, second pressing and third pressing: first, perform first pressing to form a embryo, and then, perform second pressing and third pressing to increase the plasticity of the sesame, and the oil yield is 47%.
[0039] Water cooling of the core: pass cooling water with a temperature of 15℃ and a flow rate of 2L / min to adjust the temperature inside the press.
[0040] S4, filter the cold-pressed sesame oil through a 120-mesh plate frame filter with a filtration pressure of 0.2MPa and a filtration time of 5 minutes to remove larger impurity particles; then, cool the semi-finished product after the first filtration to 5℃ by using a cooling device with a cooling rate of 2℃ / min, and then filter the semi-finished product through a membrane filter with a pore size of 10 microns with a filtration pressure of 0.15MPa and a filtration time of 8 minutes, to obtain clear and transparent cold-pressed sesame oil.
[0041] S5, the refined sesame oil is filled with nitrogen gas with a purity of 99.99%, the nitrogen filling pressure is 0.1 MPa, and the nitrogen-filled sesame oil is stored in a stainless steel storage tank.
[0042] Example 2
[0043] The embodiment provides a production method of high-quality cold-pressed sesame oil, which comprises the following steps:
[0044] S1, the sesame is poured into a magnetic separation device with a magnetic field strength of 10000Gs, and the magnetic separation time is 3 minutes to remove ferromagnetic impurities; the magnetically separated sesame is sent into a vibrating screen with a vibration frequency of 40Hz and an amplitude of 8mm, and the screening time is 5 minutes to remove large impurities, grass stems, dust and other impurities; the screened sesame is sent into a specific gravity stone removing machine with a working wind speed of 4m / s, and the stone removing time is 4 minutes to remove stones, grass leaves, dust and other impurities.
[0045] Then, the first screening (the vibration screen parameters are the same as before, and the screening time is 5 minutes), the stone removing (the specific gravity stone removing machine parameters are the same as before, and the stone removing time is 4 minutes), the second screening (the vibration screen parameters are the same as before, and the screening time is 5 minutes) and the magnetic separation (the magnetic separation device parameters are the same as before, and the magnetic separation time is 3 minutes) are sequentially performed to further remove impurities.
[0046] S2, the moisture content of the sesame is adjusted to 6.5% by using a spray humidifying device with a spray amount of 0.8L / min, and the temperature of the sesame is adjusted to 50 DEG C by using a constant temperature heating device with a heating power of 8kW, and the heating time is 13 minutes to increase the plasticity of the sesame.
[0047] S3, the conditioned sesame is sent into a low-temperature press with a core water cooling function, and the first-stage pressing (the pressure is 13MPa, and the pressing time is 7 minutes), the second-stage pressing (the pressure is 18MPa, and the pressing time is 10 minutes) and the third-stage pressing (the pressure is 23MPa, and the pressing time is 14 minutes) are sequentially performed.
[0048] First pressing, second pressing and third pressing: the first pressing is performed to form an embryo, a small amount of oil is extracted to increase the plasticity of the sesame, and then the second pressing and the third pressing are sequentially performed to extract oil, and the oil extraction rate is 48%.
[0049] Core water cooling: cooling water with a temperature of 20 DEG C and a flow of 4L / min is introduced to adjust the temperature inside the press.
[0050] S4, the cold-pressed sesame oil is filtered through a 150-mesh plate frame filter with a filtering pressure of 0.3MPa and a filtering time of 8 minutes to remove larger impurity particles; the semi-finished product after the first filtration is cooled to 8 DEG C by using a cooling device with a cooling rate of 4 DEG C / min, and then filtered through a membrane filter with a pore size of 12 microns with a filtering pressure of 0.18MPa and a filtering time of 12 minutes to obtain clear and transparent cold-pressed sesame oil.
[0051] S5, the refined sesame oil is filled with nitrogen gas with a purity of 99.99%, the nitrogen filling pressure is 0.2 MPa, and the nitrogen-filled sesame oil is stored in a stainless steel storage tank.
[0052] Example 3
[0053] The embodiment provides a production method of high-quality cold-pressed sesame oil, comprising the following steps:
[0054] S1, the sesame is poured into a magnetic separation device with a magnetic field strength of 12000Gs, and the magnetic separation is performed on the sesame for 4 minutes to remove ferromagnetic impurities; the magnetically separated sesame is sent to a vibrating screen with a vibration frequency of 50Hz and an amplitude of 10mm, and the screening is performed for 6 minutes to remove large impurities, grass stems, dust and other impurities; the screened sesame is sent to a specific gravity stone removing machine with a working wind speed of 5m / s, and the stone removing is performed for 5 minutes to remove stones, grass leaves, dust and other impurities.
[0055] Then, the first screening (the vibration screen parameters are the same as before, and the screening time is 6 minutes), the stone removing (the specific gravity stone removing machine parameters are the same as before, and the stone removing time is 5 minutes), the second screening (the vibration screen parameters are the same as before, and the screening time is 6 minutes), and the magnetic separation (the magnetic separation device parameters are the same as before, and the magnetic separation time is 4 minutes) are sequentially performed to further remove impurities.
[0056] S2, the moisture content of the sesame is adjusted to 8% by using a spray humidifying device with a spray amount of 1L / min, and the temperature of the sesame is adjusted to 60 DEG C by using a constant temperature heating device with a heating power of 10kW, and the heating time is 15 minutes, so that the plasticity of the sesame is increased.
[0057] S3, the conditioned sesame is sent to a low-temperature press with a core water cooling function, and the first-stage pressing (the pressure is 15MPa, and the pressing time is 8 minutes), the second-stage pressing (the pressure is 20MPa, and the pressing time is 12 minutes) and the third-stage pressing (the pressure is 25MPa, and the pressing time is 15 minutes) are sequentially performed.
[0058] First pressing, second pressing and third pressing: the first pressing is performed to form an embryo, a small amount of oil is extracted to increase the plasticity of the sesame, and then the second pressing and the third pressing are sequentially performed to extract oil, and the oil extraction rate is 49%.
[0059] Core water cooling: cooling water with a temperature of 25 DEG C and a flow rate of 6L / min is introduced to adjust the temperature inside the press.
[0060] S4, the cold-pressed sesame oil is filtered through a 180-mesh plate frame filter with a filtering pressure of 0.4MPa and a filtering time of 11 minutes to remove larger impurity particles; the semi-finished product after the first filtration is cooled to 11 DEG C by using a cooling device with a cooling rate of 6 DEG C / min, and then filtered through a membrane filter with a pore size of 14 microns with a filtering pressure of 0.21MPa and a filtering time of 16 minutes to obtain clear and transparent cold-pressed sesame oil.
[0061] S5, the refined sesame oil is filled with nitrogen gas with purity of 99.99%, the nitrogen filling pressure is 0.3 MPa, and the sesame oil after nitrogen filling is stored in a stainless steel storage tank.
[0062] It is to be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions.
Claims
1. A method for producing high-quality cold-pressed sesame oil, characterized in that: Includes the following steps: S1. Screening process: First, magnetic separation is performed to remove ferromagnetic impurities; then, the material enters a vibrating screen for screening to remove large impurities, grass stems, and dust; next, it enters a gravity destoner to remove stones, grass leaves, dust, and other impurities; then, the first screening, destoning, second screening, and magnetic separation operations are performed in sequence to further remove impurities. S2. Raw material conditioning process: Adjust the moisture content of sesame seeds to 5-8% and the temperature to 40-60℃ to increase the plasticity of sesame seeds and improve the yield of sesame seeds. S3. Pressing process: The sesame seeds are cold-pressed in stages. The conditioned sesame seeds are sent to a low-temperature press with a core water cooling function. They are pressed in stages: first pressing, second pressing and third pressing, to press the sesame seeds into oil. The first pressing is to form embryos and extract a small amount of oil to increase the plasticity of the sesame seeds. Then the second and third pressing are carried out to extract oil, so that the oil yield can be increased to 47-49%. S4. Multi-stage fine filtration process: Preliminary filtration: Cold-pressed sesame oil is filtered through a filter with a mesh size of 100 or higher to remove impurities; Fine filtration: The semi-finished product after the first filtration is cooled to 5-10℃ and filtered through a fine filter with a pore size of less than 15 microns and a filtration pressure of less than 0.2MPa to obtain clear and transparent cold-pressed sesame oil. S5. Storage process: After the finely filtered sesame oil is filled with nitrogen, it is stored in a stainless steel storage tank.
2. The method for producing high-quality cold-pressed sesame oil according to claim 1, characterized in that: The impurity content must be controlled to ≤0.5%.
3. The method for producing high-quality cold-pressed sesame oil according to claim 1, characterized in that: The vibration frequency of the vibrating screen is 30-50Hz, the amplitude is 5-10 minutes, the working wind speed of the gravity destoner is 3-5m / s, and the destone removal time is 3-5 minutes.
4. The method for producing high-quality cold-pressed sesame oil according to claim 1, characterized in that: The moisture is adjusted by spray humidification, and the temperature is adjusted by a constant temperature heating device.
5. The method for producing high-quality cold-pressed sesame oil according to claim 1, characterized in that: The cooling water temperature of the core water cooling function of the press is 15-25℃, and the cooling water flow rate is 2-5L / min.
6. The method for producing high-quality cold-pressed sesame oil according to claim 1, characterized in that: The temperature during the entire pressing process is controlled at ≤45℃. The low-temperature press is a three-stage press. The pressure of the first stage pressing is 10-15MPa, and the pressing time is 5-8 minutes; the pressure of the second stage pressing is 15-20MPa, and the pressing time is 8-12 minutes; the pressure of the third stage pressing is 20-25MPa, and the pressing time is 12-15 minutes.
7. The method for producing high-quality cold-pressed sesame oil according to claim 1, characterized in that: In the multi-stage fine filtration process, the primary filtration uses a plate and frame filter, and the fine filtration uses a membrane filter.
8. The method for producing high-quality cold-pressed sesame oil according to claim 1, characterized in that: In the multi-stage fine filtration process, the pore size of the fine filter is 10-15 micrometers.
9. The method for producing high-quality cold-pressed sesame oil according to claim 1, characterized in that: The nitrogen gas used for purging has a purity of ≥99.99% and a purging pressure of 0.1-0.3 MPa.