Preparation method of low-temperature-resistant high-iodine-value palm oil for lubricant

Abstract

The invention relates to the technical field of grease fractionation finished products, and particularly discloses a preparation method of low-temperature-resistant high-iodine-value palm oil for a lubricant. The preparation method of the low-temperature-resistant high-iodine-value palm oil for the lubricant comprises the following steps: heating crude palm oil to completely dissolve the crude palm oil, then adding glyceryl stearate and cane sugar, and mixing to obtain a crude palm oil solution; cooling the palm crude oil solution to 21-23 DEG C, keeping the temperature constant, cooling to 11-13 DEG C, keeping the temperature constant, continuously cooling to 2-4 DEG C, keeping the temperature constant, continuously cooling to (-6)-(4) DEG C, and keeping the temperature constant to obtain a solid-liquid mixture; separating the solid-liquid mixture to obtain palm liquid oil; and adding a crystal inhibitor and an antioxidant into the palm liquid oil, and mixing to obtain a palm oil finished product. The palm oil finished product obtained through the preparation method has the advantages of being low in melting point, good in low temperature resistance, high in iodine value and high in yield, is suitable for being used as a lubricating agent and meets market requirements.

Description

Technical Field

[0001] The present application relates to the technical field of oil fractionation products, and more specifically, to a method for preparing low-temperature resistant high-iodine value palm oil for lubricant. Background Art

[0002] Palm oil is the oil extracted from palm pulp, that is, it is produced by squeezing raw materials. Palm oil contains a variety of effective ingredients, such as triglycerides, diglycerides, oleic acid, palmitic acid, stearic acid, linoleic acid, etc., which have been widely recognized and used. Because palm oil has good lubricity, it is often used as a lubricating aid and applied in lubricants. Palm oil in lubricants can effectively improve viscosity and fluidity, reduce equipment surface wear, extend equipment service life, and improve lubrication effect. However, the common 24-degree palm oil and 33-degree palm oil on the market, when used in lubricants, due to the high melting point of palm oil, it is easy to crystallize in a low temperature environment, resulting in turbidity, affecting the use effect. Therefore, how to reduce the melting point of palm oil, thereby improving the low temperature resistance of palm oil, has become one of the technical problems that technicians in this field need to solve. Summary of the invention

[0003] In order to reduce the melting point of finished palm oil products, thereby improving the low-temperature resistance of palm oil, the present application provides a method for preparing low-temperature resistant high-iodine value palm oil for lubricant.

[0004] In the first aspect, the present application provides a method for preparing low temperature resistant high iodine value palm oil for lubricant, using the following technical scheme: A method for preparing low temperature resistant high iodine value palm oil for lubricant comprises the following steps: S1. Heat the palm crude oil at 60-70° C. under constant stirring to completely dissolve it, then add glyceryl stearate and sucrose to mix and obtain a palm crude oil solution; S2. While stirring continuously, cooling the crude palm oil solution to 21-23°C, and keeping the temperature constant for 50-70 min. Cooling it to 11-13°C at a cooling rate of 0.5-1.5°C / min, and keeping the temperature constant for 1-3 h. Cooling it further to 2-4°C, and keeping the temperature constant for 3-5 h. Cooling it further to (-6)-(4)°C, and keeping the temperature constant for 8-10 h to obtain a solid-liquid mixture. S3, separating the solid-liquid mixture at a temperature of (-6)-(4)°C, heating it to room temperature, and obtaining palm olein; S4, adding a crystal inhibitor and an antioxidant into the palm olein to mix and obtain a palm oil finished product.

[0005] The preparation method of the present application, through the mutual coordination between each step, makes the iodine value of the palm oil product greater than 75gI / 100g, the iodine value improvement rate greater than 21%, the melting point less than -5°C, and the yield greater than 86%. The palm oil product exhibits the advantages of low melting point, high low temperature resistance, high iodine value, and high yield, and can be used as a lubricating additive and in lubricants to meet market demand.

[0006] The preparation method of the present application first heats to fully dissolve palm oil, and then adds octadecanoic acid glyceryl and sucrose. Then, four-step cooling is adopted. During the cooling process, the palm oil solution gradually crystallizes, and in the presence of octadecanoic acid glyceryl and sucrose, the crystal surface area is effectively increased, the crystallization is accelerated to form a network, the crystallization rate is also accelerated, and crystallization is promoted. At the same time, constant temperature treatment is also carried out in the four-step cooling, which can effectively make the crystal grow continuously, increase the crystal granularity, reduce the appearance of fine crystals, improve the impurity removal rate, and improve the iodine value and yield of the palm oil finished product, and reduce the melting point of the palm oil finished product, so that the palm oil finished product shows better comprehensive performance.

[0007] Optionally, the weight ratio of the palm crude oil, stearyl glycerol and sucrose is 100:(0.01-0.03):(0.01-0.03).

[0008] By adopting the above technical scheme, the weight ratio of palm crude oil, stearyl glycerol and sucrose is optimized, the added amount of stearyl glycerol and sucrose is limited, and the use effect of stearyl glycerol and sucrose is guaranteed.

[0009] Optionally, the iodine value of the palm crude oil is 60-70gI / 100g.

[0010] By adopting the above technical solution, the iodine value of crude palm oil is optimized, the stability of the source of crude palm oil is ensured, and then the stability of palm oil finished products is ensured, which helps to improve its application effect in lubricants.

[0011] Optionally, the weight ratio of the palm olein, the crystal inhibitor and the antioxidant is 100:(0.02-0.03):(0.01-0.02).

[0012] By adopting the above technical solution, the weight ratio of palm olein, crystal inhibitor and antioxidant is optimized, the added amount of crystal inhibitor and antioxidant is limited, and the stability of palm oil finished product is ensured.

[0013] Optionally, the crystal inhibitor is one or more of hydroxystearin, monopalmitin, and behenic acid glyceryl.

[0014] By adopting the above technical solution, the crystal inhibitor is optimized, which is convenient for the selection of the crystal inhibitor. In addition, hydroxystearin, monopalmitin glyceryl, and behenic acid glyceryl can play an anti-crystallization role and improve the low temperature resistance of the palm oil finished product.

[0015] Optionally, the antioxidant is one or more of vitamin E, sodium ascorbate, tert-butylhydroquinone, butylated hydroxyanisole, and butylated hydroxytoluene.

[0016] By adopting the above technical solution, antioxidants are optimized and the selection of antioxidants is facilitated. In addition, vitamin E, sodium ascorbate, tert-butylhydroquinone, butylated hydroxyanisole and butylated hydroxytoluene can effectively prevent the oxidation and deterioration of palm oil products, improve the stability of palm oil products and extend their service life.

[0017] Optionally, in step S1, the heating time is 2-4 hours.

[0018] By adopting the above technical solution, the heating time in step S1 is optimized, so that the crude palm oil is fully dissolved, and the mixing of the crude palm oil, octadecyl glyceride and sucrose is facilitated, and the uniformity and stability of the crude palm oil solution are ensured.

[0019] Optionally, in step S2, the stirring rate is 5-10 r / min.

[0020] By adopting the above technical solution, the stirring rate in step S2 is optimized, which reduces the impact of too fast stirring rate on the crystallization and crystal growing processes, and also reduces the impact of too slow stirring rate on heat dissipation. When the stirring rate is 5-10r / min, it does not affect the crystallization and crystal growing processes, and helps to transfer heat and ensure the crystal particle size, thereby improving the iodine value and low temperature resistance of the palm oil finished product, so that the palm oil finished product exhibits better performance.

[0021] Optionally, in step S3, the separation method is centrifugal separation.

[0022] By adopting the above technical solution, the solid-liquid mixture contains solid crystals and liquid palm oil, which are then separated by centrifugation, effectively achieving solid-liquid separation and ensuring the purity and quality of the palm oil.

[0023] Optionally, in step S1, the stirring rate is 15-25 r / min.

[0024] By adopting the above technical solution, the stirring rate in step S1 is optimized, which facilitates the dissolution of crude palm oil, the mixing of crude palm oil, glyceryl stearate and sucrose, and increases the uniformity of the crude palm oil solution.

[0025] Optionally, in step S2, the crude palm oil solution is cooled to 21-23°C at a cooling rate of 3-5°C / min.

[0026] By adopting the above technical solution, the cooling rate to 21-23°C is optimized, which reduces the impact of crystallization due to too fast a cooling rate and also reduces the time cost due to too slow a cooling rate. In addition, within 3-5°C / min, the time is reduced and the preparation efficiency is accelerated while ensuring the quality of the finished palm oil product.

[0027] Optionally, in step S4, the stirring rate is 15-25 r / min.

[0028] By adopting the above technical solution, the stirring rate in step S4 is optimized, which is helpful for mixing the palm olein, the crystal inhibitor and the antioxidant, and ensures the uniformity of the palm oil product.

[0029] In a second aspect, the present application provides a palm oil product, which adopts the following technical solution: A palm oil finished product is prepared by adopting the method for preparing low temperature resistant high iodine value palm oil for lubricant.

[0030] A lubricant, whose raw materials include palm oil finished product, and the palm oil finished product is prepared by adopting the preparation method of low temperature resistant high iodine value palm oil for lubricant.

[0031] In summary, this application has at least the following beneficial effects: The preparation method of low-temperature resistant high-iodine value palm oil for lubricant of the present application comprises the following steps: firstly, heating is performed to fully dissolve the palm crude oil, and then cooling is performed in four steps. During the cooling process, crystals gradually appear in the palm crude oil solution, and in the presence of octadecyl glyceride and sucrose, the crystal surface is increased, the crystallization is accelerated to form a network, the crystal precipitation is promoted, the crystal grows continuously, the crystal particle size is increased, the appearance of fine crystals is reduced, the impurity removal rate is improved, the iodine value and yield of the palm oil product are improved, and the melting point of the palm oil product is reduced, so that the iodine value of the palm oil product is greater than 75gI / 100g, the iodine value improvement rate is greater than 21%, the melting point is less than -5°C, and the yield is greater than 86%. The palm oil product has the advantages of low melting point, good low-temperature resistance, high iodine value and high yield, is suitable for use as a lubricant, and meets market demand. DETAILED DESCRIPTION

[0032] In order to make the present application easier to understand, the present application will be further described in detail below in conjunction with the examples, which are merely illustrative and are not intended to limit the scope of application of the present application. The raw materials or components used in the present application can be obtained through commercial routes or conventional methods unless otherwise specified.

[0033] Example

[0034] Example 1

[0035] A method for preparing low temperature resistant high iodine value palm oil for lubricant comprises the following steps: S1. Heat the palm crude oil for 3 h at a stirring rate of 20 r / min and a temperature of 65° C. until the palm crude oil is completely dissolved. Then add octadecanoic acid glyceryl and sucrose and stir for 3 min to obtain a palm crude oil solution.

[0036] Among them, the weight ratio of palm crude oil, stearyl glycerol and sucrose is 100:0.02:0.02; the iodine value of palm crude oil is 62.2gI / 100g.

[0037] S2. Under a stirring rate of 8 r / min, the palm crude oil solution obtained in step S1 is cooled to 22° C. at a cooling rate of 4° C. / min, and the temperature is kept constant for 60 min. Then, the temperature is cooled to 12° C. at a cooling rate of 1° C. / min, and the temperature is kept constant for 2 h. The temperature is further cooled to 3° C. and the temperature is kept constant for 4 h. The temperature is further cooled to -5° C. and the temperature is kept constant for 8 h to obtain a solid-liquid mixture.

[0038] S3. Using a centrifuge, centrifuge the solid-liquid mixture obtained in step S2 at a temperature of -5°C, and heat it to 23°C to obtain palm olein.

[0039] S4. Adding a crystal inhibitor and an antioxidant to the palm oil at a stirring rate of 20 r / min and a temperature of 23° C. and stirring for 3 minutes to obtain a palm oil product.

[0040] Among them, the weight ratio of palm olein, crystal inhibitor and antioxidant is 100:0.025:0.015; the crystal inhibitor is hydroxystearin, and is selected from Henan Ruiren Bioengineering Co., Ltd.; the antioxidant is vitamin E.

[0041] Example 2 A method for preparing low temperature resistant high iodine value palm oil for lubricant comprises the following steps: S1. Heat the palm crude oil for 2 h at a stirring rate of 15 r / min and a temperature of 70°C until the palm crude oil is completely dissolved. Then add octadecanoic acid glyceryl and sucrose and stir for 3 min to obtain a palm crude oil solution.

[0042] Among them, the weight ratio of palm crude oil, stearyl glycerol and sucrose is 100:0.02:0.02; the iodine value of palm crude oil is 62.2gI / 100g.

[0043] S2. Under a stirring rate of 10 r / min, the palm crude oil solution obtained in step S1 is cooled to 23° C. at a cooling rate of 5° C. / min, and the temperature is kept constant for 70 min. Then, the temperature is cooled to 13° C. at a cooling rate of 1.5° C. / min, and the temperature is kept constant for 3 h. The temperature is further cooled to 4° C. and the temperature is kept constant for 5 h. The temperature is further cooled to -4° C. and the temperature is kept constant for 10 h to obtain a solid-liquid mixture.

[0044] S3. Using a centrifuge, centrifuge the solid-liquid mixture obtained in step S2 at a temperature of -4°C, and heat it to 23°C to obtain palm olein.

[0045] S4. Adding a crystal inhibitor and an antioxidant to the palm oil at a stirring rate of 15 r / min and a temperature of 23° C. and stirring for 3 minutes to obtain a palm oil product.

[0046] Among them, the weight ratio of palm olein, crystal inhibitor and antioxidant is 100:0.02:0.02; the crystal inhibitor is hydroxystearin, and is selected from Henan Ruiren Bioengineering Co., Ltd.; the antioxidant is vitamin E.

[0047] Example 3 A method for preparing low temperature resistant high iodine value palm oil for lubricant comprises the following steps: S1. Heat the palm crude oil for 4 hours at a stirring rate of 25 r / min and a temperature of 60° C. until the palm crude oil is completely dissolved. Then add octadecanoic acid glyceryl and sucrose and stir for 3 minutes to obtain a palm crude oil solution.

[0048] Among them, the weight ratio of palm crude oil, stearyl glycerol and sucrose is 100:0.02:0.02; the iodine value of palm crude oil is 62.2gI / 100g.

[0049] S2. Under a stirring rate of 5 r / min, the palm crude oil solution obtained in step S1 was cooled to 21° C. at a cooling rate of 3° C. / min, and kept at the constant temperature for 50 min. Then, the temperature was cooled to 11° C. at a cooling rate of 0.5° C. / min, and kept at the constant temperature for 1 h, and then the temperature was further cooled to 2° C. and kept at the constant temperature for 3 h, and then the temperature was further cooled to -6° C. and kept at the constant temperature for 8 h to obtain a solid-liquid mixture.

[0050] S3. Using a centrifuge, centrifuge the solid-liquid mixture obtained in step S2 at a temperature of -6°C, and heat it to 23°C to obtain palm olein.

[0051] S4. Adding a crystal inhibitor and an antioxidant to the palm oil at a stirring rate of 25 r / min and a temperature of 23° C. and stirring for 3 minutes to obtain a palm oil product.

[0052] Among them, the weight ratio of palm olein, crystal inhibitor and antioxidant is 100:0.03:0.01; the crystal inhibitor is hydroxystearin, and is selected from Henan Ruiren Bioengineering Co., Ltd.; the antioxidant is vitamin E.

[0053] Example 4 A method for preparing low-temperature resistant high-iodine value palm oil for lubricant, which is different from Example 1 in that in step S1, the weight ratio of palm crude oil, stearyl glyceride and sucrose is different, and the weight ratio of palm crude oil, stearyl glyceride and sucrose is 100:0.01:0.03.

[0054] Example 5 A method for preparing low-temperature resistant high-iodine value palm oil for lubricant, which is different from Example 1 in that in step S1, the weight ratio of palm crude oil, stearyl glyceride and sucrose is different, and the weight ratio of palm crude oil, stearyl glyceride and sucrose is 100:0.03:0.01.

[0055] Comparative Example Comparative Example 1 A method for preparing low-temperature resistant high-iodine value palm oil for lubricant, which differs from Example 1 in that, in step S1, glyceryl stearate and sucrose are replaced with equal amounts of crude palm oil.

[0056] Comparative Example 2 A method for preparing low-temperature resistant high-iodine value palm oil for lubricant, which differs from Example 1 in that in step S1, sucrose is replaced by an equal amount of octadecanoic acid glyceride.

[0057] Comparative Example 3 A method for preparing low-temperature resistant high-iodine value palm oil for lubricant, which differs from Example 1 in that, in step S1, octadecanoic acid glyceryl is replaced by an equal amount of sucrose.

[0058] Comparative Example 4 A method for preparing low temperature resistant high iodine value palm oil for lubricant, which differs from Example 1 in that in step S1, sucrose is replaced by an equal amount of glucose.

[0059] Comparative Example 5 A method for preparing low temperature resistant high iodine value palm oil for lubricant, which is different from Example 1 in that step S2 is different.

[0060] Step S2 specifically comprises: cooling the palm crude oil solution obtained in step S1 to -5°C at a cooling rate of 4°C / min under a stirring rate of 8 r / min, and treating the solution at a constant temperature for 15 hours to obtain a solid-liquid mixture.

[0061] Comparative Example 6 A method for preparing low temperature resistant high iodine value palm oil for lubricant, which is different from Example 1 in that step S2 is different.

[0062] Step S2 specifically comprises: cooling the palm crude oil solution obtained in step S1 to -5°C at a cooling rate of 1°C / min under a stirring rate of 8 r / min, and maintaining the temperature for 15 hours to obtain a solid-liquid mixture.

[0063] Comparative Example 7 A method for preparing low temperature resistant high iodine value palm oil for lubricant, which is different from Example 1 in that step S2 is different.

[0064] Step S2 is specifically as follows: the palm crude oil solution obtained in step S1 is cooled to 22°C at a cooling rate of 4°C / min under a stirring rate of 8 r / min, and the mixture is kept at the constant temperature for 60 min. The mixture is then cooled to 3°C at a cooling rate of 1°C / min, and the mixture is kept at the constant temperature for 6 h. The mixture is then cooled to -5°C, and the mixture is kept at the constant temperature for 8 h to obtain a solid-liquid mixture.

[0065] Comparative Example 8 A method for preparing low temperature resistant high iodine value palm oil for lubricant, which is different from Example 1 in that step S2 is different.

[0066] Step S2 is specifically as follows: the palm crude oil solution obtained in step S1 is cooled to 22°C at a cooling rate of 4°C / min under a stirring rate of 8 r / min, and the mixture is kept at the constant temperature for 60 min. The mixture is then cooled to 12°C at a cooling rate of 1°C / min, and the mixture is kept at the constant temperature for 6 h. The mixture is then cooled to -5°C, and the mixture is kept at the constant temperature for 8 h to obtain a solid-liquid mixture.

[0067] Performance Testing The palm oil products obtained in Examples 1-5 and Comparative Examples 1-8 were respectively taken, and the iodine value of the palm oil products was detected according to GB / T15680-2009. The melting point of the palm oil products was detected by using a heat flow differential scanning calorimeter. The yield of the palm oil products was also detected. The test results are shown in Table 1.

[0068] Among them, the iodine value improvement rate / (%)=(iodine value of palm oil finished product-iodine value of palm crude oil) / iodine value of palm crude oil×100%.

[0069] Table 1 Test results

[0070] As can be seen from Table 1, the finished palm oil product obtained by the preparation method of the present application has a high iodine value and iodine value improvement rate, with an iodine value of 75.4-76.8gI / 100g and an iodine value improvement rate of 21.2-23.5%, showing the characteristics of high iodine value. It also has a low melting point of (-5.86)-(-5.45)°C, showing good low temperature resistance. At the same time, it also has a high yield of 86.1-88.6%, showing the characteristics of high yield. In the preparation method of the present application, through the mutual coordination between the steps, the finished palm oil product has the advantages of good low temperature resistance, high iodine value and high yield, meeting market demand.

[0071] Compare Example 1 with Comparative Examples 1-3. In step S1 of the preparation method of Comparative Example 1, glyceryl stearate and sucrose were not added; in step S1 of the preparation method of Comparative Example 2, glyceryl stearate was added; in step S1 of the preparation method of Comparative Example 3, sucrose was added; in step S1 of the preparation method of Example 1, glyceryl stearate and sucrose were added. It can be seen from this that the addition of glyceryl stearate and sucrose to crude palm oil and the synergistic effect thereof can significantly improve the iodine value and low temperature resistance of the finished palm oil. Combined with Comparative Example 4, glyceryl stearate and glucose were added in step S1 of the preparation method of Comparative Example 4. It can be seen from this that compared with the addition of glucose to crude palm oil, the addition of sucrose to crude palm oil can significantly enhance the interaction between it and glyceryl stearate, and make the finished palm oil show better comprehensive performance. Comparative Examples 5 and 6 are compared. In step S2 of the preparation method of Comparative Example 5, the temperature is lowered to -5°C in one step, and the cooling rate is 4°C / min; in step S2 of the preparation method of Comparative Example 6, the temperature is lowered to -5°C in one step, and the cooling rate is 1°C / min. It can be seen that reducing the cooling rate is conducive to crystallization and improving the performance of the palm oil product.

[0072] Compare Example 1 and Comparative Examples 7-8. In step S2 of the preparation method of Comparative Example 7, three steps of cooling are adopted, first cooling to 22°C, then cooling to 3°C, and then cooling to -5°C; in step S2 of the preparation method of Comparative Example 8, three steps of cooling are adopted, first cooling to 22°C, then cooling to 14°C, and then cooling to -5°C; in step S2 of the preparation method of Example 1, four steps of cooling are adopted, first cooling to 22°C, then cooling to 14°C, then cooling to 3°C, and then cooling to -5°C. It can be seen that the four-step cooling method is better than the three-step cooling method, and the four-step cooling method can effectively promote crystallization, improve crystallization efficiency, increase crystal particle size, reduce the melting point of palm oil products, and improve the iodine value and yield of palm oil products.

[0073] It should be noted that the embodiments described above are only used to explain the present application and do not constitute any limitation to the present application. The present application is described with reference to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory words, rather than restrictive words. The present application may be modified as specified within the scope of the claims of the present application, and the present invention may be revised without departing from the scope and spirit of the present application. Although the present application described therein relates to specific methods, materials and embodiments, it does not mean that the present application is limited to the specific examples disclosed therein. On the contrary, the present application can be extended to all other methods and applications with the same functions.

Claims

1. A method for preparing low temperature resistant high iodine value palm oil for lubricant, characterized in that: The steps include: S1. Heat the palm crude oil at 60-70° C. under constant stirring to completely dissolve it, then add glyceryl stearate and sucrose to mix and obtain a palm crude oil solution; S2. While stirring continuously, cooling the crude palm oil solution to 21-23°C, and keeping the temperature constant for 50-70 min. Cooling it to 11-13°C at a cooling rate of 0.5-1.5°C / min, and keeping the temperature constant for 1-3 h. Cooling it further to 2-4°C, and keeping the temperature constant for 3-5 h. Cooling it further to (-6)-(4)°C, and keeping the temperature constant for 8-10 h to obtain a solid-liquid mixture. S3, separating the solid-liquid mixture at a temperature of (-6)-(4)°C, heating it to room temperature, and obtaining palm olein; S4, adding a crystal inhibitor and an antioxidant into the palm olein to mix and obtain a palm oil finished product.

2. The method for preparing the low temperature resistant high iodine value palm oil for lubricant according to claim 1, characterized in that: The weight ratio of the palm crude oil, stearyl glycerol and sucrose is 100:(0.01-0.03):(0.01-0.03).

3. The method for preparing a low temperature resistant high iodine value palm oil for lubricant according to claim 1, characterized in that: The iodine value of the palm crude oil is 60-70 gI / 100 g.

4. The method for preparing the low temperature resistant high iodine value palm oil for lubricant according to claim 1, characterized in that: The weight ratio of the palm olein, the crystal inhibitor and the antioxidant is 100:(0.02-0.03):(0.01-0.02).

5. The method for preparing the low temperature resistant high iodine value palm oil for lubricant according to claim 1, characterized in that: The crystal inhibitor is one or more of hydroxystearin, monopalmitin glyceryl, and behenic acid glyceryl.

6. The method for preparing a low temperature resistant high iodine value palm oil for lubricant according to claim 1, characterized in that: The antioxidant is one or more of vitamin E, sodium ascorbate, tert-butylhydroquinone, butylated hydroxyanisole and butylated hydroxytoluene.

7. The method for preparing the low temperature resistant high iodine value palm oil for lubricant according to claim 1, characterized in that: In step S1, the heating time is 2-4 hours.

8. The method for preparing a low temperature resistant high iodine value palm oil for lubricant according to claim 1, characterized in that: In step S2, the stirring rate is 5-10 r / min.

9. The method for preparing a low temperature resistant high iodine value palm oil for lubricant according to claim 1, characterized in that: In step S3, centrifugal separation is used as the separation method.

10. A palm oil finished product, characterized in that: The lubricant is prepared by the method for preparing low-temperature-resistant high-iodine value palm oil as claimed in any one of claims 1 to 9.

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