Production process and application of micron-scale fatty glyceride fine powder
The production of micron-sized fine powder of fatty acid glycerides by centrifugal spray cooling device and mixing of raw materials in a gravity-free mixer solves the problems of large particle size and uneven mixing, achieving better coating effect and production efficiency.
Patent Information
- Application Number
- CN202511015818.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-23
- Publication Date
- 2025-11-11
AI Technical Summary
The large particle size of existing fatty acid glycerides limits their downstream applications, especially their poor performance in expanded polystyrene coating agents. Furthermore, the dry mixing method leads to uneven mixing, which affects the application effect.
A centrifugal spray cooling device is used to produce micron-level fine powder of fatty acid glycerides. The raw materials such as monoglycerides, triglycerides, and zinc stearate are mixed in a gravity-free mixer using a gravity-free dry mixing method to form a uniform coating agent.
The production of micron-sized fine powder with uniform particle size improves its performance in expanded polystyrene coating agents, avoids the risk of electrostatic dust explosion, and enhances production efficiency and product performance.
Smart Images
Figure CN120919656A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of chemical material production technology, specifically to a production process and application of micron-level fine powder of fatty acid glycerides. Background Technology
[0002] Most fatty acid glycerides on the market are in the form of small particles, typically with a particle size of over 100 micrometers in diameter. This limits their use in certain downstream applications that require fine powders.
[0003] Expanded polystyrene (EPS) is a widely used plastic packaging material, mainly used in packaging, building materials and other industries. During the production of EPS, a coating agent is applied to the surface of the particles after they are formed, thereby providing functions such as antistatic properties, moisture barrier, and lubrication for demolding during the pre-foaming and foaming processes.
[0004] Currently, the production methods for coating agents commonly used in the market vary. Typically, a simple mixer is used to dry-mix fine powders such as monoglycerides, triglycerides, and zinc stearate. The disadvantages of this dry-mixing method are: because the specific gravity, particle size, and proportions of various particles are different, the mixture is uneven after dry mixing, thus affecting the application results. Furthermore, since zinc stearate particles lack adhesiveness, they must rely on the adhesiveness of monoglycerides and triglycerides to adhere to the EPS particles, but this easily leads to powder shedding, causing partial functional failure.
[0005] Therefore, the production process and application of a micron-level fine powder of fatty acid glycerides has become an urgent problem to be solved. Summary of the Invention
[0006] The technical problem to be solved by this invention is to provide a production process and application of micron-level fine powder of fatty acid glycerides. On the one hand, micron-level fine powder of fatty acid glycerides is produced by using a centrifugal spray cooling device, which makes it easier to use in downstream application fields and broadens its applications. On the other hand, a coating agent for expanded polystyrene (EPS) is produced by dry mixing method, using ultrafine powder (micron-level) such as monoglycerides, triglycerides, zinc stearate, fatty acid amides, and silica as raw materials, which are fully mixed in a gravity-free mixer.
[0007] To solve the above-mentioned technical problems, the technical solution provided by the present invention is: a production process for micron-level fine powder of fatty acid glycerides, comprising the following steps:
[0008] S1. Add monoglyceride or triglyceride to the dissolving reactor and heat it above its melting point until it is completely dissolved into a liquid phase, then stir thoroughly for 0.5-3 hours.
[0009] S2. After the liquid product has been thoroughly stirred, it is transported to the high-level tank through the pipeline. After the liquid level in the high-level tank is kept stable, the liquid product is then transported to the centrifugal spray head.
[0010] S3. Turn on the high-speed centrifugal rotor of the centrifugal spray device to make the centrifugal rotor speed reach 12,000-20,000 rpm; after the liquid product is centrifuged, it forms fine droplets and is cooled into small particles by the cold air input by the cold air blower.
[0011] S4. Small particles continuously descend and cool in the centrifugal drying tower, reaching the bottom of the tower and being packed into containers to form an intermediate.
[0012] S5. The intermediate product is removed and left to stand for 0-10 days to allow it to cool completely.
[0013] S6. After the product has been fully cooled, it is sieved to obtain micron-level fine powder of fatty acid glycerides.
[0014] Furthermore, in step S2, the liquid level in the high-level tank is kept stable by a liquid level maintainer, thereby achieving a stable liquid phase input pressure.
[0015] Furthermore, the dissolving reactor includes a melting vessel, a bottom plate, a motor, and a stirrer.
[0016] The bottom plate is located at the bottom of the melting pot, with steam introduced at one end and drainage at the other end. The motor is fixed at the top of the melting pot, and its power output shaft extends vertically downward. The agitator is fixed at the end of the motor's power output shaft.
[0017] Furthermore, the centrifugal spray device includes a centrifugal spray head, a centrifugal drying tower, a centrifugal rotor, a lever, and a discharge pipe;
[0018] The centrifugal spray head is located at the top of the centrifugal drying tower, and the centrifugal rotor is located at the bottom of the centrifugal drying tower with its power output end connected to a lever to drive it to rotate horizontally; the centrifugal drying tower has symmetrical exhaust bags on both sides that are connected to it, and the discharge pipe has several pipes that are connected to the bottom of the centrifugal drying tower.
[0019] Furthermore, the air cooler is connected to a heat exchanger and then to a centrifugal drying tower.
[0020] Furthermore, the high-level tank is equipped with a liquid level holder, the top of which is equipped with a raw material feeding pipe and the bottom with a discharge pipe. The discharge pipe is connected to a centrifugal spray head. The liquid level holder is equipped with a return pipe inside, the upper end of which extends to the upper part of the liquid level holder and the lower end extends downward to the bottom of the liquid level holder to connect to the outside.
[0021] Furthermore, the discharge pipe is equipped with a discharge control valve.
[0022] This invention also provides an application of micron-sized fine powder of fatty acid glycerides in the production of a coating agent for expanded polystyrene ultrafine powder using a dry mixing method. The coating agent comprises the following raw materials in parts by weight: 40-60 parts of monoglyceride, 30-50 parts of triglyceride, 15-20 parts of zinc stearate, 5-15 parts of EBS ethylene bis-stearamide, and 5-10 parts of silica. The monoglyceride and triglyceride are micron-sized fine powders manufactured using the above-mentioned production process.
[0023] Furthermore, the production process of the coating agent is as follows:
[0024] Step 1: Add the raw materials in proportion to the zero-gravity dry mixer;
[0025] Step 2: Start the zero-gravity dry mixer and mix for 1-3 hours;
[0026] Step 3: After stopping the machine and letting it stand for 1 hour, discharge the material, sieve it, and package it to obtain the finished product.
[0027] The advantages of this invention compared to existing technologies are as follows: This invention can produce fine powder products with a particle size of less than 75 micrometers using a centrifugal spray device, filling a market gap and providing better and more suitable finished products for downstream applications. Furthermore, it effectively avoids the risk of electrostatic dust explosions during the production process while achieving high production efficiency.
[0028] This invention employs a gravity-free dry mixing method using monoglycerides, triglycerides, zinc stearate and / or fatty acid amides, and silica as raw materials. These materials are thoroughly mixed in a gravity-free dry mixer for approximately 1-3 hours to ensure uniform particle distribution. The finished product achieves a particle size of approximately 50 micrometers (D50), allowing for excellent and uniform coating onto EPS particles, reducing powder shedding, and significantly improving processing efficiency and product performance in the EPS industry. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the dissolution reactor.
[0030] Figure 2 This is a schematic diagram of a centrifugal spray device.
[0031] Figure 3 This is a top view of the centrifugal spray device.
[0032] Figure 4 This is a schematic diagram of the liquid level holder.
[0033] As shown in the figure: 1. Melting vessel, 2. Base plate, 3. Motor, 4. Agitator, 5. Centrifugal spray head, 6. Centrifugal drying tower, 7. Centrifugal rotor, 8. Lever, 9. Discharge pipe, 10. Exhaust bag, 11. Air cooler, 12. Heat exchanger, 13. High-level tank, 14. Liquid level holder, 15. Raw material feeding pipe, 16. Discharge pipe, 17. Return pipe, 18. Discharge control valve. Detailed Implementation
[0034] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0035] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0036] The production process and application of a micron-level fine powder of fatty acid glycerides according to the present invention will be further described in detail below with reference to the accompanying drawings.
[0037] Combined with appendix Figure 1-4 The specific implementation process of the production process and application of the micron-level fine powder of fatty acid glycerides of the present invention is as follows:
[0038] Example 1
[0039] A process for producing micron-sized fine powder of fatty acid glycerides includes the following steps:
[0040] S1: Dissolving and stirring
[0041] Monoglycerides or triglycerides are added to the dissolving reactor and heated above their melting point to completely dissolve them into a liquid phase, typically at 80-120°C. The dissolving reactor includes a melting vessel 1, a bottom plate 2, a motor 3, and a stirrer 4. The bottom plate 2 is located at the bottom of the melting vessel 1, with steam introduced at one end and drainage at the other, providing heat for the melting process and draining condensate. The motor 3 is fixed to the top of the melting vessel 1, with its power output shaft extending vertically downwards. The stirrer 4 is fixed to the end of the motor 3's power output shaft. After the liquid phase forms, the mixture is stirred thoroughly for 0.5-3 hours to ensure uniform material distribution.
[0042] S2: Liquid Phase Transport and Liquid Level Stabilization
[0043] The thoroughly stirred liquid product is transported to the elevated tank 13 via pipeline. To maintain a stable liquid level in the elevated tank 13, a reflux device is used to achieve a stable liquid input pressure. A level maintainer 14 is installed inside the elevated tank 13. The level maintainer 14 has a raw material feeding pipe 15 at its top and a discharge pipe 16 at its bottom, which connects to the centrifugal spray head 5. A reflux pipe 17 is installed inside the level maintainer 14, extending upwards to the top of the level maintainer 14 and downwards to the bottom of the level maintainer 14, connecting to the outside. A discharge control valve 18 is installed on the discharge pipe 16 to precisely control the output of the liquid product. After the liquid level stabilizes, the liquid product is transported to the centrifugal spray head 5.
[0044] S3: Centrifugal spray and cooling
[0045] The high-speed centrifugal rotor 7 of the centrifugal spray device is activated, causing its rotational speed to reach 12,000-20,000 rpm. The centrifugal spray device includes a centrifugal spray head 5, a centrifugal drying tower 6, a centrifugal rotor 7, a lever 8, and a discharge pipe 9. The centrifugal spray head 5 is located at the top of the centrifugal drying tower 6, and the centrifugal rotor 7 is located at the bottom of the centrifugal drying tower 6, with its power output end connected to the lever 8 to drive its horizontal rotation. After centrifugation, the liquid product is formed into fine droplets. Simultaneously, a cooler 11, connected to a heat exchanger 12 and then to the centrifugal drying tower 6, cools the fine droplets into small particles using the cold air input from the cooler 11.
[0046] S4: Particle Collection
[0047] Small particles continuously descend and cool within the centrifugal drying tower 6, reaching the bottom where they are collected in containers to form an intermediate product. The centrifugal drying tower 6 is symmetrically equipped with exhaust bags 10 connected to both sides to facilitate the discharge of gases generated during the drying process. Several discharge pipes 9 are provided and connected to the bottom of the centrifugal drying tower 6 to facilitate the output of the intermediate product.
[0048] S5: Intermediate Cooling
[0049] Remove the intermediate product and let it stand for 0-10 days to allow it to cool completely, ensuring stable product performance.
[0050] S6: Sift to obtain fine powder
[0051] After being fully cooled, the product is sieved to obtain micron-level fine powder of fatty acid glycerides, which meets the requirements of subsequent applications.
[0052] Example 2
[0053] An application of a micron-sized fine powder of fatty acid glycerides in the production of an ultrafine powder coating agent for expanded polystyrene using a dry mixing method. The coating agent comprises the following raw materials in parts by weight: 40-60 parts monoglyceride, 30-50 parts triglyceride, 15-20 parts zinc stearate, 5-15 parts EBS ethylene bis-stearamide, and 5-10 parts silica. The monoglyceride and triglyceride are micron-sized fine powders manufactured using the aforementioned process. This specific combination of raw materials, combined with the micron-sized fine powder produced by this invention, imparts excellent performance to the coating agent.
[0054] Example 3
[0055] The production process of the coating agent in Example 2 is as follows:
[0056] Step 1: Mixing raw materials
[0057] Add the above raw materials in proportion in a zero-gravity dry mixer to ensure that the raw materials are in full contact, in order to prepare for uniform mixing in the subsequent process.
[0058] Step 2: Mixing
[0059] Start the zero-gravity dry mixer and mix for 1-3 hours to allow the various raw materials to be fully mixed under mechanical force and achieve a uniform dispersion.
[0060] Step 3: Unloading and Packaging
[0061] After the machine is stopped and left to stand for 1 hour, the material is discharged and sieved to remove any possible agglomerated particles or other impurities. Then it is packaged to obtain the finished product, ensuring the quality and stability of the coating agent.
[0062] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.
Claims
1. A process for producing micron-sized fine powder of fatty acid glycerides, characterized in that, Includes the following steps: S1. Add monoglyceride or triglyceride to the dissolving reactor and heat it above its melting point until it is completely dissolved into a liquid phase, then stir thoroughly for 0.5-3 hours. S2. After the liquid product has been thoroughly stirred, it is transported to the high-level tank through the pipeline. After the liquid level in the high-level tank is kept stable, the liquid product is then transported to the centrifugal spray head. S3. Turn on the high-speed centrifugal rotor of the centrifugal spray device to make the centrifugal rotor speed reach 12,000-20,000 rpm; The liquid product is centrifuged to form fine droplets, which are then cooled into small particles by cold air supplied by a blower. S4. Small particles continuously descend and cool in the centrifugal drying tower, reaching the bottom of the tower and being packed into containers to form an intermediate. S5. The intermediate product is removed and left to stand for 0-10 days to allow it to cool completely. S6. After the product has been fully cooled, it is sieved to obtain micron-level fine powder of fatty acid glycerides.
2. The production process of a fatty acid glyceride micron-level fine powder according to claim 1, characterized in that: In step S2, the liquid level in the high-level tank is kept stable by the liquid level holder, thereby achieving a stable liquid phase input pressure.
3. The production process of a micron-level fine powder of fatty acid glycerides according to claim 2, characterized in that: The melting reactor includes a melting vessel, a bottom plate, a motor, and a stirrer; the bottom plate is located at the bottom of the melting vessel with steam introduced at one end and drainage at the other end; the motor is fixed at the top of the melting vessel with its power output shaft extending vertically downward; and the stirrer is fixed at the end of the motor's power output shaft.
4. The production process of a fatty acid glyceride micron-level fine powder according to claim 3, characterized in that: The centrifugal spray device includes a centrifugal spray head, a centrifugal drying tower, a centrifugal rotor, a lever, and a discharge pipe; The centrifugal spray head is located at the top of the centrifugal drying tower, and the centrifugal rotor is located at the bottom of the centrifugal drying tower with its power output end connected to a lever to drive it to rotate horizontally; the centrifugal drying tower has symmetrical exhaust bags on both sides that are connected to it, and the discharge pipe has several pipes that are connected to the bottom of the centrifugal drying tower.
5. The production process of a fatty acid glyceride micron-level fine powder according to claim 4, characterized in that: The air cooler is connected to the heat exchanger and then to the centrifugal drying tower.
6. The production process of a fatty acid glyceride micron-level fine powder according to claim 5, characterized in that: The high-level tank is equipped with a liquid level holder. The liquid level holder has a raw material feeding pipe at the top and a discharge pipe at the bottom. The discharge pipe is connected to a centrifugal spray head. The liquid level holder has a return pipe inside. The upper end of the return pipe extends to the upper part of the liquid level holder, and the lower end extends downward to the bottom of the liquid level holder to connect to the outside.
7. The production process of a fatty acid glyceride micron-level fine powder according to claim 6, characterized in that: The discharge pipe is equipped with a discharge control valve.
8. The application of a micron-sized fine powder of fatty acid glycerides in the production of an ultrafine powder coating agent for expanded polystyrene using a dry mixing method, characterized in that, The coating agent comprises the following raw materials in parts by weight: 40-60 parts monoglyceride, 30-50 parts triglyceride, 15-20 parts zinc stearate, 5-15 parts EBS ethylene bis-stearamide, and 5-10 parts silica. The monoglyceride and triglyceride are micron-level fine powders manufactured by the production process described in any one of claims 1-7.
9. The application of the fatty acid glyceride micron-level fine powder according to claim 8 in the production of a coating agent for expanded polystyrene ultrafine powder using a dry mixing method, characterized in that... The production process of the coating agent is as follows: Step 1: Add the raw materials in proportion to the zero-gravity dry mixer; Step 2: Start the zero-gravity dry mixer and mix for 1-3 hours; Step 3: After stopping the machine and letting it stand for 1 hour, discharge the material, sieve it, and package it to obtain the finished product.