Processing method of lubricating and dispersing aid for plastic processing

Abstract

The invention relates to the field of preparation of dispersing agents for plastic processing, and particularly discloses a processing method of a lubricating dispersing aid for plastic processing, which comprises the following steps: adding ester modified whiskers into palm oil according to a mass ratio of 100: (3-5), ultrasonically dispersing for 2-4 minutes at 50-58 DEG C, and filtering out the ester modified whiskers to obtain pretreated palm oil; adding an emulsifier and a catalyst into the pretreated palm oil according to the mass ratio of 100: (1-3): (0.5-1), keeping the temperature at 50-58 DEG C, and uniformly mixing and stirring to obtain a mixture; the mixture is cooled to 15-20 DEG C, an inducer is added in the cooling process, the mass ratio of the mixture to the inducer is 100: (0.5-1), ultrasonic dispersion is conducted for 30-60 s after cooling, and a semi-finished product is obtained; separating, packaging and storing the semi-finished product to obtain palm oil; the method has the advantage of improving the quality of the palm oil grease.

Description

Technical Field

[0001] The present application relates to the field of preparation of dispersants for plastic processing, and more specifically, to a method for processing a lubricating dispersant for plastic processing. Background Art

[0002] Lubricating dispersants are often required to be added during the plastic processing to ensure the quality of plastic processing. Palm oil, as an environmentally friendly and renewable natural oil, can be obtained continuously. Palm oil can ensure that additives such as pigments or fillers in plastics are evenly distributed, thereby improving the overall quality and consistency of the product. At the same time, palm oil can reduce melt viscosity and effectively improve the processing performance of plastics. While improving production efficiency, it also reduces energy consumption and equipment wear. The natural antioxidant components in palm oil help enhance the oxidation resistance of plastics and extend the service life of the product.

[0003] The processing of lubricating oils and fats generally includes the following steps: raw material collection and screening, fruit processing, pressing and extraction, filtration, refining, purification, crystallization, separation, packaging and storage. Crystallized palm oil can separate different fatty acid components; promoting the rapid crystallization of palm oil can not only shorten the production cycle of the enterprise and improve production efficiency, but also make the produced palm oil more delicate and uniform, thereby improving its quality.

[0004] In the prior art, a Chinese patent document with publication number CN106497674A discloses a method for promoting crystallization of oil, characterized in that it comprises the following steps: (1) eliminating crystallization memory of oil; (2) adding an emulsifier to the oil at 60-85°C, wherein the emulsifier is polyglycerol fatty acid ester, distilled monostearate glyceryl, sodium stearoyl lactylate or propylene glycol fatty acid ester, and stirring evenly; (3) cooling to 20-35°C; (4) treating the sample obtained in step (3) with high-intensity ultrasound, wherein the ultrasound power is 190-285W and the ultrasound time is 10-60s, wherein the ultrasound instrument is turned on for 5s and then turned off for 5s; in the process of eliminating crystallization memory and adding emulsifier for mixing and stirring, not only the temperature is high, but also the stirring time is long, which easily causes oxidation problems of palm oil during processing.

[0005] Therefore, how to accelerate the crystallization rate of palm oil in lubricating oils and greases, and prevent the excessive oxidation and deterioration of palm oil during processing, so as to ensure the quality of palm oil and enable it to be used in the processing of high-quality plastics, is a problem to be solved. Summary of the invention

[0006] In order to accelerate the crystallization rate of palm oil in lubricating grease, prevent excessive oxidation and deterioration of palm oil during processing, ensure the quality of palm oil and enable it to be used in the processing of high-quality plastics, the present application provides a processing method for a lubricating and dispersing agent for plastic processing.

[0007] The present application provides a method for processing a lubricating and dispersing agent for plastic processing, which adopts the following technical solution: A method for processing a lubricating and dispersing agent for plastic processing comprises the following steps: S1. Adding ester-modified whiskers to palm oil at a mass ratio of 100:3-5, ultrasonically dispersing at 50-58° C. for 2-4 min, filtering out the ester-modified whiskers, and obtaining pretreated palm oil; S2, adding an emulsifier and a catalyst to the pretreated palm oil in a mass ratio of 100:1-3:0.5-1, maintaining a temperature of 50-58° C. and stirring the mixture to obtain a mixture; S3. The mixture is cooled to 15-20° C., an inducer is added during the cooling process, the mass ratio of the mixture to the inducer is 100:0.5-1, and ultrasonic dispersion is performed for 30-60 seconds after cooling to obtain a semi-finished product; the semi-finished product is separated, packaged, and stored to obtain palm oil.

[0008] By adopting the above technical scheme, ester-modified whiskers are added to palm oil, which is then ultrasonically dispersed after heating. The ultrasonic dispersion time is limited to a short time to ensure that the original crystal memory in the palm oil after purification is eliminated. Combined with the subsequent heating ultrasonic dispersion and the cutting effect of the ester-modified whiskers, the palm oil can form a smaller and more uniform crystal structure, thereby improving the quality of palm oil and enabling it to be used in the processing of high-quality plastics.

[0009] By utilizing the mutual attraction between the ester groups on the surface of ester-modified whiskers and the lipophilic groups in palm oil, the ester-modified whiskers are attracted to the crystalline structure composed of fatty acid glycerides in palm oil. The penetrating effect of the whiskers, combined with ultrasonic dispersion, allows the whiskers to cut the crystalline structure of the fatty acid molecular chain, eliminating the original crystalline memory structure, thereby further facilitating the formation of a finer and more uniform crystalline structure for palm oil, thereby improving the quality of palm oil.

[0010] After eliminating the crystallization memory, palm oil is evenly mixed with emulsifiers and catalysts. Under the condition of maintaining temperature, the problem of aggregation and accumulation of molecules in palm oil is avoided as much as possible to affect the formation of a fine and uniform crystal structure of palm oil. Under the induction of the emulsifier and the catalytic effect of the catalyst, the palm oil that eliminates the crystallization memory uses small molecules as the starting point of crystallization, and the crystal nucleus grows rapidly. With the subsequent inducer, a template for attachment and arrangement is provided for the palm oil molecules, reducing the energy barrier of crystallization, further promoting the rapid and uniform formation of crystals, and improving the quality of palm oil.

[0011] By limiting the temperature and ultrasonic dispersion time, under the conditions of lower temperature and shorter ultrasonic time, palm oil is less likely to be oxidized and the shelf life of palm oil is extended.

[0012] Preferably, the ester-modified whiskers are prepared from cellulose acetate butyrate, sodium carboxymethyl cellulose solution and porous hydroxyapatite whiskers in a mass ratio of 1:1-2:3-8.

[0013] By adopting the above technical scheme, the bonding effect of sodium carboxymethyl cellulose solution is utilized to adhere cellulose acetate butyrate to the surface of porous hydroxyapatite whiskers, and the lipophilic effect of cellulose acetate butyrate is utilized to facilitate mutual attraction and contact with palm oil, so that the porous hydroxyapatite whiskers reach the palm oil crystal structure, and the cutting effect of the whiskers and the porous diversion effect are utilized to promote the rapid dispersion of the palm oil crystal network under ultrasonic conditions, thereby realizing the rapid elimination of crystal memory; and the sodium carboxymethyl cellulose solution is insoluble in oil, thereby ensuring the relatively stable adhesion of cellulose acetate butyrate to the surface of porous hydroxyapatite whiskers, thereby ensuring the destruction effect of the crystal network.

[0014] Even if a small amount of cellulose acetate butyrate and sodium carboxymethyl cellulose remain in the palm oil during the ultrasonic process, it will not affect the quality of the palm oil. Moreover, the acetate butyric acid group in cellulose acetate butyrate combined with the carboxymethyl group in sodium carboxymethyl cellulose can further promote the orderly arrangement of palm oil molecules, facilitate the formation of crystal nuclei, reduce crystallization energy, promote crystal formation, and achieve the effect of rapid crystallization.

[0015] Preferably, the average particle size of the cellulose acetate butyrate is 3-5 μm, and the average length of the porous hydroxyapatite whiskers is 80-150 μm.

[0016] By adopting the above technical scheme, the particle size of cellulose acetate butyrate and the particle size of porous hydroxyapatite whiskers are limited, which ensures the cutting effect while facilitating the ester-modified whiskers to quickly reach the crystal network of fatty acid molecules. Under ultrasonic conditions, not only can the crystal memory be quickly eliminated, but small molecules can also form crystals quickly and evenly under the action of emulsifiers and catalysts, thereby improving the quality of palm oil.

[0017] Preferably, the sodium hydroxymethyl cellulose solution is a sodium hydroxymethyl cellulose aqueous solution with a mass fraction of 1-3%, and the molecular weight of the sodium hydroxymethyl cellulose is 200,000-400,000.

[0018] By adopting the above technical scheme, high molecular weight sodium carboxymethyl cellulose not only has a high viscosity, which is convenient for stably adhering cellulose acetate butyrate to the surface of porous hydroxyapatite, but also the porous hydroxyapatite whiskers have a large specific surface area, which can further adsorb the sodium carboxymethyl cellulose solution, achieve stable adhesion and accelerate the formation of crystals, thereby improving the quality of palm oil.

[0019] Preferably, the emulsifier is composed of citric acid ester, triolein and sucrose ester liquid in a mass ratio of 1:1-3:1-2.

[0020] By adopting the above technical scheme, citrate ester, triolein and sucrose ester liquid are matched, and the ester group in citrate ester is used to match the ester group in sucrose ester, so as to interact with the fatty acid molecules in palm oil, which serves as the starting point of crystallization to form a crystal nucleus. The hydrophilic and hydrophobic groups in the sucrose ester liquid are easy to adsorb on the surface of the crystal nucleus on the one hand, and can form a protective layer around the crystal nucleus on the other hand. The molecular structure of triolein is highly similar to that of palm oil. During the crystallization process, triolein can easily penetrate into the palm oil molecules to accelerate crystallization, and triolein can induce. At the same time, the hydrophilic groups in triolein and sucrose ester are easy to play a guiding role, regulating the arrangement of palm oil molecules, thereby adjusting the crystallization rate and crystallization morphology, ensuring the uniformity of crystallization, and improving the quality of palm oil.

[0021] Preferably, the catalyst is formic acid.

[0022] By adopting the above technical solution, formic acid can catalyze the molecular arrangement and crystallization of palm oil, reduce the crystallization barrier and increase the crystallization rate.

[0023] Preferably, the frequency of the ultrasonic dispersion in S1 is 20-40 kHz.

[0024] By adopting the above technical solution, the frequency of ultrasonic dispersion is limited to low-frequency processing, which ensures that the original crystalline memory network is destroyed while maintaining the structural stability of the ester-modified whiskers as much as possible.

[0025] Preferably, the S3 cooling rate is 1-3°C / min.

[0026] By adopting the above technical solution, the cooling rate is limited to ensure the formation of crystals, and the stability and uniformity of the crystals are ensured.

[0027] Preferably, the inducer is polyethylene glycol.

[0028] By adopting the above technical solution, the oxygen atoms and hydroxyl functional groups on the polyethylene glycol molecular chain may interact with the ester groups or fatty acid chains in the palm oil molecules, which helps the palm oil molecules to arrange in an orderly manner during the crystallization process and accelerates the crystal formation.

[0029] Preferably, the frequency of the S3 ultrasonic dispersion is 40-60 kHz.

[0030] By adopting the above technical solution, the ultrasonic dispersion frequency is limited to a high level, which ensures uniform crystallization and promotes crystal formation.

[0031] In summary, this application has the following beneficial effects: 1. Adding ester-modified whiskers to palm oil, using ultrasonic dispersion and the cutting effect of ester-modified whiskers, makes it easier to eliminate the crystal memory. Combined with emulsifiers, catalysts and inducers, it promotes the formation of a smaller and more uniform crystal structure in palm oil, thereby improving the quality of palm oil and enabling it to be used in the processing of high-quality plastics.

[0032] 2. The bonding effect of sodium carboxymethyl cellulose solution is utilized to adhere cellulose acetate butyrate to the surface of porous hydroxyapatite whiskers. The lipophilic effect of cellulose acetate butyrate is utilized to facilitate mutual attraction and contact with palm oil, so that the porous hydroxyapatite whiskers can reach the crystal structure of palm oil. The cutting effect of whiskers and the porous diversion effect are utilized to promote the rapid dispersion of the crystal network of palm oil under ultrasonic conditions, thereby achieving rapid elimination of crystal memory. The sodium carboxymethyl cellulose solution is insoluble in oil, which ensures the relatively stable adhesion of cellulose acetate butyrate to the surface of porous hydroxyapatite whiskers, thereby ensuring the destruction effect of the crystal network. With the subsequent treatment of emulsifiers, catalysts and inducers, it can promote the rapid crystallization of palm oil and ensure the quality of palm oil.

[0033] 3. The citric acid ester, triolein and sucrose ester liquid are coordinated. The ester group in the citric acid ester is used to cooperate with the ester group in the sucrose ester, which is convenient for interacting with the fatty acid molecules in palm oil. As the starting point of crystallization, a crystal nucleus is formed. The hydrophilic and hydrophobic groups in the sucrose ester liquid are convenient for adsorption on the surface of the crystal nucleus on the one hand, and can form a protective layer around the crystal nucleus on the other hand. The molecular structure of triolein is highly similar to that of palm oil. During the crystallization process, triolein can easily penetrate into the palm oil molecules to accelerate crystallization. In addition, triolein can induce. At the same time, the hydrophilic groups in triolein and sucrose ester are convenient for guiding and regulating the arrangement of palm oil molecules, thereby adjusting the crystallization rate and crystallization morphology, ensuring the uniformity of crystallization, and making the palm oil have higher quality. DETAILED DESCRIPTION

[0034] The present application is further described in detail below with reference to the embodiments.

[0035] Preparation Example of Ester-Modified Whiskers The cellulose acetate butyrate in the following raw materials was purchased from Hubei Watson Chemical Technology Co., Ltd.; other raw materials were all commercially available.

[0036] Preparation Example 1: Ester-modified whiskers are prepared by the following method: 1.5 kg of carboxymethyl cellulose solution is evenly sprayed on the surface of 5 kg of porous hydroxyapatite whiskers, and then 1 kg of cellulose acetate butyrate is added at a speed of 30 g / min. During the adding process, the porous hydroxyapatite whiskers are stirred at a speed of 120 r / min. After being evenly mixed, ester-modified whiskers are obtained; the porous hydroxyapatite whiskers have an average length of 100 μm and an average diameter of 20 nm, the average particle size of cellulose acetate butyrate is 4 μm, the sodium carboxymethyl cellulose solution is a sodium carboxymethyl cellulose aqueous solution with a mass fraction of 2%, and the molecular weight of the sodium carboxymethyl cellulose is 300,000.

[0037] Preparation Example 2: This preparation example differs from Preparation Example 1 in that: 1kg of carboxymethyl cellulose solution is evenly sprayed on the surface of 3kg of porous hydroxyapatite whiskers, and then 1kg of cellulose acetate butyrate is added at a speed of 30g / min. During the adding process, the porous hydroxyapatite whiskers are stirred at a speed of 120r / min. After being evenly mixed, ester-modified whiskers are obtained; the average length of the porous hydroxyapatite whiskers is 80μm, the average diameter is 20nm, the average particle size of the cellulose acetate butyrate is 3μm, the sodium carboxymethyl cellulose solution is a sodium carboxymethyl cellulose aqueous solution with a mass fraction of 1%, and the molecular weight of the sodium carboxymethyl cellulose is 200,000.

[0038] Preparation Example 3: This preparation example differs from Preparation Example 1 in that: 2kg of carboxymethyl cellulose solution is evenly sprayed on the surface of 8kg of porous hydroxyapatite whiskers, and then 1kg of cellulose acetate butyrate is added at a speed of 30g / min. During the adding process, the porous hydroxyapatite whiskers are stirred at a speed of 120r / min. After being evenly mixed, ester-modified whiskers are obtained; the average length of the porous hydroxyapatite whiskers is 150μm, the average diameter is 20nm, the average particle size of the cellulose acetate butyrate is 5μm, the sodium carboxymethyl cellulose solution is a sodium carboxymethyl cellulose aqueous solution with a mass fraction of 3%, and the molecular weight of the sodium carboxymethyl cellulose is 400,000. Example

[0039] Among the following raw materials, citrate was purchased from Wuhan Shuer Biotechnology Co., Ltd., liquid, model 6619; triolein was purchased from Jiangsu Leien Environmental Protection Technology Co., Ltd., liquid; sucrose monostearate was purchased from Nantong Runfeng Petrochemical Co., Ltd.; other raw materials were all commercially available.

[0040] Example 1: A processing method for a lubricating and dispersing aid for plastic processing: S1. Add 4 kg of ester-modified whiskers to 100 kg of palm oil, wherein the ester-modified whiskers are prepared in Preparation Example 1, and ultrasonically disperse them at 55° C. for 3 min at a frequency of 30 kHz. Filter out the ester-modified whiskers to obtain pretreated palm oil. S2. Add 2 kg of emulsifier and 0.8 kg of catalyst to 100 kg of pretreated palm oil, wherein the emulsifier is composed of citric acid ester, triolein and sucrose ester liquid in a mass ratio of 1:1.8:1.2, the sucrose ester liquid is a 10% by mass sucrose monostearate ethanol mixed liquid, the ethanol mass fraction is 99%, the catalyst is formic acid, and the formic acid concentration is 90%, the temperature is maintained at 55° C., and the mixture is mixed and stirred at 200 r / min for 5 minutes, and the mixture is mixed and stirred to obtain a mixture; S3. The mixture is cooled to 18°C ​​at a cooling rate of 2°C / min. During the cooling process, 0.8kg of inducer is added to 100kg of the mixture. The inducer is polyethylene glycol, and the polyethylene glycol is polyethylene glycol 800. Ultrasonic dispersion is performed simultaneously during the cooling process. After cooling, ultrasonic dispersion is performed for 40s. The frequency of ultrasonic dispersion is 50kHz to obtain a semi-finished product. The semi-finished product is separated, packaged, and stored to obtain palm oil.

[0041] Embodiment 2: This embodiment differs from Embodiment 1 in that: S1. Add 3 kg of ester-modified whiskers to 100 kg of palm oil, wherein the ester-modified whiskers are prepared in Preparation Example 2, and ultrasonically disperse them at 50° C. for 4 min at a frequency of 20 kHz. Filter out the ester-modified whiskers to obtain pretreated palm oil; S2, adding 1 kg of emulsifier and 0.5 kg of catalyst to 100 kg of pretreated palm oil, wherein the emulsifier is composed of citric acid ester, triolein and sucrose ester liquid in a mass ratio of 1:1:1, and the catalyst is formic acid with a formic acid concentration of 90%, maintaining a temperature of 50° C., mixing and stirring at 200 r / min for 5 minutes, and mixing and stirring to obtain a mixture; S3. The mixture is cooled to 20°C at a cooling rate of 1°C / min. During the cooling process, 0.5kg of an inducer is added to 100kg of the mixture. The inducer is polyethylene glycol, and the polyethylene glycol is polyethylene glycol 800. During the cooling process, ultrasonic dispersion is performed for 30s at a frequency of 60kHz to obtain a semi-finished product. The semi-finished product is separated, packaged, and stored to obtain palm oil.

[0042] Embodiment 3: This embodiment differs from Embodiment 1 in that: S1. Add 5 kg of ester-modified whiskers to 100 kg of palm oil, wherein the ester-modified whiskers are prepared in Preparation Example 3, and ultrasonically disperse them at 58° C. for 2 min at a frequency of 40 kHz. Filter out the ester-modified whiskers to obtain pretreated palm oil. S2, adding 3 kg of emulsifier and 1 kg of catalyst to 100 kg of pretreated palm oil, wherein the emulsifier is composed of citric acid ester, triolein and sucrose ester liquid in a mass ratio of 1:3:2, and the catalyst is formic acid with a formic acid concentration of 90%. Maintaining the temperature at 58° C., mixing and stirring at 200 r / min for 5 minutes, and mixing and stirring uniformly to obtain a mixture; S3. The mixture is cooled to 15°C at a cooling rate of 3°C / min. During the cooling process, 1 kg of an inducer is added to 100 kg of the mixture. The inducer is polyethylene glycol, and the polyethylene glycol is polyethylene glycol 800. During the cooling process, ultrasonic dispersion is performed for 60 seconds at a frequency of 40 kHz to obtain a semi-finished product. The semi-finished product is separated, packaged, and stored to obtain palm oil.

[0043] Embodiment 4: This embodiment differs from Embodiment 1 in that: The ester-modified whiskers were prepared by the following method: 1 kg of cellulose acetate butyrate was heated to 150° C. to be hot-melted and then evenly sprayed on the surface of 5 kg of porous hydroxyapatite whiskers to obtain ester-modified whiskers.

[0044] Embodiment 4: This embodiment differs from Embodiment 1 in that: No citrate esters or sucrose ester liquids were added to the emulsifier.

[0045] Comparative Example Comparative Example 1: The difference between this comparative example and Example 1 is that: No ester-modified whiskers were added to S1.

[0046] Comparative Example 2: The difference between this comparative example and Example 1 is that: In S1, the porous hydroxyapatite whiskers were replaced by silica whiskers of equal mass.

[0047] Comparative Example 3: The difference between this comparative example and Example 1 is that: The temperature in S1 was 80°C for ultrasonic dispersion for 10 min, and the temperature in S2 was 80°C for stirring for 20 min.

[0048] Comparative Example 4: The difference between this comparative example and Example 1 is that: No catalyst was added to S2.

[0049] Comparative Example 5: The difference between this comparative example and Example 1 is that: No inducer was added to S3.

[0050] Performance testing 1. Crystallization rate detection Finished products were prepared by the methods of Examples 1-5 and Comparative Examples 1-2 and 4-5, respectively. The finished products were used as samples, 3 mL of the samples were transferred into a special glass tube for nuclear magnetic resonance, and the solid fat content was determined every 30 seconds using a desktop nuclear magnetic resonance instrument; the cover slip and the slide were placed in a 30°C constant temperature box for preheating for 30 minutes, and then the samples were prepared separately and placed in a 4°C constant temperature box for 12 hours, and the crystal microstructure was observed under a microscope; the crystallization kinetic constant was analyzed by the Avrami equation, and the crystallization rate constant k value was obtained. The data were recorded, and a large k value indicated that the crystallization rate was accelerated, the crystallization amount increased, and the crystal particle size decreased.

[0051] 2. Antioxidant test Finished products were prepared by the methods of Examples 1-3 and Comparative Example 3, and the peroxide value of the quality of palm oil was tested with reference to GB / T15680-2009, and the data were recorded.

[0052] Table 1 Performance test table (“ / ” in the table means that the corresponding embodiment or comparative example did not test the item, so there is no data) From Examples 1-3 and Table 1, it can be seen that the palm oil prepared in the present application has a larger k value, indicating that it has the advantages of rapid crystallization and smaller crystal size, and a lower peroxide value, indicating that the palm oil is not easily oxidized during the preparation process, so that the quality of the palm oil has better quality.

[0053] It can be seen from Example 1 and Examples 4-5 and Table 1 that no sodium carboxymethyl cellulose aqueous solution was added during the preparation of the ester-modified whiskers in Example 4. Compared with Example 1, the k value of the palm oil prepared in Example 4 is smaller than that in Example 1, indicating that the presence of sodium carboxymethyl cellulose can guide crystal growth, promote the orderly arrangement of fatty acid molecules in palm oil, and promote crystallization, so that the palm oil has a rapid crystallization effect during the preparation process.

[0054] In Example 5, no citrate and sucrose ester liquid are added to the emulsifier. Compared with Example 1, the k value of the palm oil prepared in Example 4 is smaller than that in Example 1. This indicates that the ester group in the citrate ester is combined with the ester group in the sucrose ester to facilitate interaction with the fatty acid molecules in the palm oil, which serves as the starting point of crystallization to form a crystal nucleus. The hydrophilic and hydrophobic groups in the sucrose ester liquid are easy to adsorb on the surface of the crystal nucleus on the one hand, and can form a protective layer around the crystal nucleus on the other hand. At the same time, the hydrophilic groups in triolein and sucrose ester are easy to play a guiding role, regulating the arrangement of palm oil molecules, thereby adjusting the crystallization rate and crystal morphology, ensuring the uniformity of crystallization, and making the palm oil have higher quality.

[0055] Combining Example 1 and Comparative Examples 1-5 and Table 1, it can be seen that no ester-modified whiskers are added in Comparative Example 1S1, and compared with Example 1, the k value of the palm oil prepared in Comparative Example 1 is smaller than that in Example 1; this indicates that the ester groups on the surface of the ester-modified whiskers and the lipophilic groups in the palm oil attract each other, which facilitates the ester-modified whiskers to be attracted to the crystalline structure composed of fatty acid glycerides in the palm oil, and the penetration effect of the porous hydroxyapatite whiskers combined with ultrasonic dispersion makes it easy for the whiskers to cut the crystalline structure of the fatty acid molecular chain, quickly eliminate the crystallization memory, and cooperate with emulsifiers, catalysts and inducers to enable the palm oil to quickly form a smaller and more uniform crystalline structure, thereby improving the quality of the palm oil.

[0056] In Comparative Example 2S1, the porous hydroxyapatite whiskers were replaced with silica whiskers of equal mass. Compared with Example 1, the k value of the palm oil prepared in Comparative Example 2 was smaller than that in Example 1; this indicates that the surface of the ordinary silica whiskers is not loaded with cellulose acetate butyrate, making it difficult for the silica whiskers to be attracted and attached to the fatty acid molecular network of the palm oil. The silica whiskers only rely on the stirring effect of ultrasonic dispersion, and the ultrasonic cutting effect of cellulose acetate butyrate attached to the surface of the porous hydroxyapatite whiskers becomes worse, thereby affecting the crystallization rate, crystal size and crystal uniformity.

[0057] In Comparative Example 3 S1, the temperature is 80°C for ultrasonic dispersion for 10 min, and in S2, the temperature is 80°C for stirring for 20 min. Compared with Example 1, the peroxide value of palm oil prepared in Comparative Example 3 is greater than that in Example 1, which indicates that ultrasonic dispersion for a long time under high temperature conditions and stirring for a long time under high temperature conditions easily lead to large-area contact with oxygen during ultrasonic dispersion and stirring, thereby making palm oil easily oxidized, thereby affecting the quality of palm oil.

[0058] No catalyst was added to Comparative Example 4S2. Compared with Example 1, the k value of palm oil prepared in Comparative Example 4 was smaller than that in Example 1, indicating that formic acid can catalyze the molecular arrangement and crystallization of palm oil, provide a starting point and guide for crystallization, reduce the crystallization barrier, and increase the crystallization rate.

[0059] No inducer was added in Comparative Example 5S3. Compared with Example 1, the k value of the palm oil prepared in Comparative Example 5 was smaller than that in Example 1. This indicates that the oxygen atoms and hydroxyl functional groups on the polyethylene glycol molecular chain may interact with the ester groups or fatty acid chains in the palm oil molecules, which helps the palm oil molecules to arrange in order during the crystallization process and accelerates the formation of crystals.

[0060] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A method for processing a lubricating and dispersing agent for plastic processing, characterized in that: The steps include: S1. Adding ester-modified whiskers to palm oil at a mass ratio of 100:3-5, ultrasonically dispersing at 50-58° C. for 2-4 min, filtering out the ester-modified whiskers, and obtaining pretreated palm oil; S2, adding an emulsifier and a catalyst to the pretreated palm oil in a mass ratio of 100:1-3:0.5-1, maintaining a temperature of 50-58° C. and stirring the mixture to obtain a mixture; S3. The mixture is cooled to 15-20° C., an inducer is added during the cooling process, the mass ratio of the mixture to the inducer is 100:0.5-1, and ultrasonic dispersion is performed for 30-60 seconds after cooling to obtain a semi-finished product; the semi-finished product is separated, packaged, and stored to obtain palm oil.

2. The method for processing a lubricating and dispersing agent for plastic processing according to claim 1, characterized in that: The ester-modified whisker is prepared from cellulose acetate butyrate, sodium carboxymethyl cellulose solution and porous hydroxyapatite whisker in a mass ratio of 1:1-2:3-8.

3. The method for processing a lubricating and dispersing agent for plastic processing according to claim 2, characterized in that: The average particle size of the cellulose acetate butyrate is 3-5 μm, and the average length of the porous hydroxyapatite whisker is 80-150 μm.

4. The method for processing a lubricating and dispersing agent for plastic processing according to claim 2, characterized in that: The sodium hydroxymethyl cellulose solution is a sodium hydroxymethyl cellulose aqueous solution with a mass fraction of 1-3%, and the molecular weight of the sodium hydroxymethyl cellulose is 200,000-400,000.

5. The method for processing a lubricating and dispersing agent for plastic processing according to claim 1, characterized in that: The emulsifier is composed of citric acid ester, triolein and sucrose ester liquid in a mass ratio of 1:1-3:1-2.

6. The method for processing a lubricating and dispersing agent for plastic processing according to claim 1, characterized in that: The catalyst is formic acid.

7. The method for processing a lubricating and dispersing agent for plastic processing according to claim 1, characterized in that: The frequency of the ultrasonic dispersion in S1 is 20-40 kHz.

8. The method for processing a lubricating and dispersing agent for plastic processing according to claim 1, characterized in that: The S3 cooling rate is 1-3°C / min.

9. The method for processing a lubricating and dispersing agent for plastic processing according to claim 1, characterized in that: The inducer is polyethylene glycol.

10. The method for processing a lubricating and dispersing agent for plastic processing according to claim 1, characterized in that: The frequency of the S3 ultrasonic dispersion is 40-60 kHz.

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