Hydroxyl silicone oil preparation polymerization reactor

Abstract

The utility model relates to the field of hydroxyl silicone oil preparation equipment, specifically discloses a kind of polymeric reaction kettle for hydroxyl silicone oil preparation, including reactor body, kettle body includes inner kettle body and outer kettle body, motor and gear are arranged on outer kettle body, can drive inner kettle body relative outer kettle body rotation, reactor body is also provided with sealing cover, spring pedestal is arranged in the middle in sealing cover interior, spring pedestal bottom connects spring, spring bottom connects inner kettle body sealing plate, sealing block is arranged around inner kettle body sealing plate bottom, sealing groove is arranged around inner kettle body top, inner kettle body sealing plate bottom connects stirring rod, by setting inner and outer kettle body, also by being set on outer kettle body rotation motor to drive inner kettle body rotation, to reach the purpose of stirring with fixed immovable stirring rod mutual cooperation, this mode can maintain stirring operation, while also can reduce the risk of stirring rod damage.

Description

Technical Field

[0001] This utility model relates to the field of equipment for preparing hydroxyl silicone oil, specifically to a polymerization reactor for preparing hydroxyl silicone oil. Background Technology

[0002] Hydroxyl silicone oil (polydimethylsiloxane hydroxyl terminal) is an important organosilicon material with excellent high and low temperature resistance, hydrophobicity, lubricity, and biocompatibility. It is widely used in cosmetics, sealants, mold release agents, and other fields. Its preparation process is mainly based on the polymerization reaction of siloxanes. By controlling the reaction conditions and raw material ratios, a product with uniform molecular weight distribution and stable hydroxyl content is obtained.

[0003] The preparation process of hydroxyl silicone oil mainly includes: 1. Polymerization reaction; 2. Neutralization reaction; 3. Removal of low-boiling substances; 4. Molecular weight regulation; 5. Filtration. The polymerization reaction is carried out by adding D4, hydroxyl end-capping agent (or MM) and catalyst in proportion to a reaction vessel, heating to 80-150℃, and then stirring for a long time to allow the ring to fully open and polymerize, thereby capping the hydroxyl groups.

[0004] In actual production, it was found that the viscosity of hydroxyl silicone oil changes during the polymerization reaction. This change can cause the stirring rod to rotate at a slower speed and even breakage during the stirring process. Utility Model Content

[0005] This utility model aims to solve the technical problems mentioned in the background section above, and proposes the following technical solutions:

[0006] A polymerization reactor for preparing hydroxyl silicone oil includes a reactor body comprising an inner reactor body and an outer reactor body. A rotating base is located at the bottom inner side of the outer reactor body, and the bottom of the inner reactor body is rotatably connected to the rotating base. A rotation limiting block with an annular structure is provided on the outer wall of the inner reactor body, and a rotation limiting groove is provided on the inner wall of the reactor body. The rotation limiting block and the rotation limiting groove are slidably connected. A sealing cover connecting plate is symmetrically arranged at the open end of the outer reactor body. A support frame is provided at the bottom of the outer reactor body, and a rotating rod is rotatably connected below the sealing cover connecting plate. A rotary motor is connected to the bottom of the rotating rod and is mounted on the support frame. A rotating gear is fitted around the outer circumference of the rotating rod. A gear connecting groove is provided on the side of the outer reactor body, and one end of the rotating gear is located within the gear connecting groove. A rack is provided around the outer circumference of the inner reactor body, and the rotating gear meshes with the rack.

[0007] The reaction vessel body is also equipped with a sealing cover, the size of which corresponds to the size of the outer vessel body. Fixing plates are respectively provided on the left and right sides of the sealing cover. A spring base is provided in the middle of the inside of the sealing cover. A spring is connected to the bottom of the spring base. An inner vessel sealing plate is connected to the bottom of the spring. Sealing blocks are provided around the bottom of the inner vessel sealing plate. Sealing grooves are provided around the top of the inner vessel. A stirring rod is connected to the bottom of the inner vessel sealing plate.

[0008] A heating module is installed inside the outer vessel body.

[0009] Preferably, the sealing cover is provided with a temperature sensor with a display function.

[0010] Preferably, the bottom of the inner vessel sealing plate is connected to multiple stirring rods, and the multiple stirring rods are provided with connecting rods.

[0011] Preferably, the inner vessel sealing plate has an exhaust hole in the middle, and an exhaust pipe is connected to the exhaust hole. The exhaust pipe passes through the middle of the spring and through the sealing cover, and one end of the exhaust pipe is connected to a vacuum machine.

[0012] The beneficial effects of this utility model are:

[0013] 1. By setting up inner and outer vessels, and by setting a rotating motor on the outer vessel to drive the inner vessel to rotate, the stirring rod is used in conjunction with the stationary stirring rod to achieve the purpose of stirring. This method can maintain the stirring operation and reduce the risk of damage to the stirring rod.

[0014] 2. By setting a spring between the inner vessel cover and the sealing cover, the upper and lower positions of the inner vessel cover and the closing state of the inner vessel are controlled by the spring, which can automatically release pressure according to the gas pressure in the reactor during the reaction process.

[0015] 3. By setting multiple stirring rods, the stirring rate can be increased. Connecting multiple stirring rods with connecting rods can ensure the strength of the stirring rods and prevent the stirring rods from breaking due to excessive viscosity of the material being stirred.

[0016] 4. By setting up a vacuum pump to extract the gas generated by the reaction in the inner vessel, not only can the pressure inside the reactor be reduced, but also some gas can be prevented from escaping into the atmosphere and causing pollution. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the present invention in Embodiment 2;

[0019] Figure 3This is a schematic diagram of the structure of this utility model in Embodiment 3.

[0020] In the diagram: 1. Reactor body; 1-1. Inner vessel body; 1-2. Outer vessel body; 2. Rotating base; 3. Rotating limit block; 4. Rotating limit groove; 5. Sealing cover connecting plate; 6. Support frame; 7. Rotating rod; 8. Rotary motor; 9. Rotating gear; 10. Gear connecting groove; 11. Rack; 12. Sealing cover; 13. Fixing plate; 14. Spring base; 15. Spring; 16. Inner vessel sealing plate; 17. Sealing block; 18. Sealing groove; 19. Stirring rod; 20. Heating module; 21. Temperature sensor; 22. Connecting rod; 23. Exhaust port; 24. Exhaust pipe; 25. Vacuum machine. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] In the description of this utility model, it should be understood that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The connection methods described by the terms "fixed connection" and "fixed setting" include, but are not limited to, "welding," "riveting," "adhesion," and "threaded connection." The terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0023] The terms “upper,” “lower,” “front,” “back,” “left,” “right,” “top,” “bottom,” “inner,” and “outer,” 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 utility model 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 utility model.

[0024] Example 1

[0025] Reference Figure 1A polymerization reactor for preparing hydroxyl silicone oil includes a reactor body 1, which comprises an inner reactor body 1-1 and an outer reactor body 1-2. A rotating base 2 is provided at the bottom inner side of the outer reactor body 1-2. The bottom of the inner reactor body 1-1 is rotatably connected to the rotating base 2. A rotating limiting block 3 with an annular structure is provided on the outer wall of the inner reactor body 1-1. A rotating limiting groove 4 is provided on the inner wall of the reactor body 1-2, and the rotating limiting block 3 is slidably connected to the rotating limiting groove 4. A sealing cover connecting plate 5 is symmetrically provided at the open end of the outer reactor body 1-2. A support frame 6 is provided at the bottom of the outer reactor body 1-2. A rotating rod 7 is rotatably connected below the sealing cover connecting plate 5. A rotary motor 8 is connected to the bottom of the rotating rod 7 and is mounted on the support frame 6. A rotating gear 9 is sleeved on the outer circumference of the rotating rod 7. A gear connecting groove 10 is provided on the side of the outer reactor body 1-2, and one end of the rotating gear 9 is located in the gear connecting groove 10. A rack 11 is provided on the outer circumference of the inner reactor body 1-1, and the rotating gear 9 meshes with the rack 11.

[0026] A sealing cover 12 is also provided on the reactor body 1. The size of the sealing cover 12 corresponds to the size of the outer reactor body 1-2. Fixing plates 13 are provided on the left and right sides of the sealing cover 12. A spring base 14 is provided in the middle of the inside of the sealing cover 12. A spring 15 is connected to the bottom of the spring base 14. The bottom of the spring 15 is connected to the inner reactor body sealing plate 16. Sealing blocks 17 are provided around the bottom of the inner reactor body sealing plate 16. Sealing grooves 18 are provided around the top of the inner reactor body 1-2. A stirring rod 19 is connected to the bottom of the inner reactor body sealing plate 16.

[0027] A heating module 20 is installed inside the outer vessel body 1-2.

[0028] Preferably, a temperature sensor 21 with display function is provided on the sealing cover 12. The temperature sensor 21 with display function transmits data wirelessly between the display end and the measuring end. The measuring end is fixed to the bottom of the inner vessel sealing plate 16, while the display end is fixed to the sealing cover 12.

[0029] In actual operation, the raw materials are placed into the inner vessel 1-1 of the reactor 1, and then the sealing cover 12 is put on. The inner vessel sealing plate 16 will also overcome the elastic force of the spring 15 and stick tightly to the inner vessel 1-1. Then, the heating module 19 is used to heat until the temperature inside the inner vessel 1-1 reaches the working temperature. Then, the rotary motor 8 is started, so that the inner vessel 1-1 rotates under the action of the rotating gear 9 to perform stirring. During this period, due to the high working temperature, some volatile substances evaporate, causing the pressure inside the reactor to rise. When it rises to a certain height, the gas pressure will push the inner vessel sealing plate 16 upward, and some gas will also escape from it, achieving the purpose of depressurization.

[0030] Using this reactor can not only solve the problem of excessive viscosity causing difficulty in stirring during the reaction of hydroxyl silicone oil, but also solve the problem of excessive pressure during the reaction.

[0031] Example 2

[0032] Reference Figure 2 Multiple stirring rods 19 are connected to the bottom of the inner vessel sealing plate 16, and the multiple stirring rods 19 are provided with connecting rods 22. By setting multiple stirring rods 19, the stirring speed can be increased. Furthermore, by connecting multiple stirring rods 19 with connecting rods 22, the strength of the stirring rods 19 can be guaranteed, and the problem of the stirring rods 19 breaking due to excessive viscosity of the stirred material can be prevented.

[0033] Example 3

[0034] Reference Figure 3 An exhaust hole 23 is provided in the middle of the inner vessel sealing plate 16. An exhaust pipe 24 is connected to the exhaust hole 23. The exhaust pipe 24 passes through the middle of the spring 15 and through the sealing cover 12. One end of the exhaust pipe 24 is connected to a vacuum machine 25. The vacuum machine 25 extracts the gas generated by the reaction in the inner vessel 1-1, which not only reduces the pressure in the reaction vessel, but also prevents some gas from escaping into the atmosphere and causing pollution.

Claims

1. A polymerization reactor for preparing hydroxyl silicone oil, comprising a reactor body (1), characterized in that, The vessel body (1) includes an inner vessel body (1-1) and an outer vessel body (1-2). A rotating base (2) is provided on the bottom inner side of the outer vessel body (1-2). The bottom of the inner vessel body (1-1) is rotatably connected to the rotating base (2). A rotating limiting block (3) is provided on the outer wall of the inner vessel body (1-1). The rotating limiting block (3) has an annular structure. A rotating limiting groove (4) is provided on the inner wall of the vessel body (1-2). The rotating limiting block (3) is slidably connected to the rotating limiting groove (4). A sealing cover connecting plate (5) is symmetrically provided at the opening end of the outer vessel body (1-2). A support frame (6) is provided at the bottom of the vessel body (1-2). A rotating rod (7) is rotatably connected below the sealing cover connecting plate (5). A rotary motor (8) is connected to the bottom of the rotating rod (7). The rotary motor (8) is mounted on the support frame (6). A rotating gear (9) is sleeved on the outer periphery of the rotating rod (7). A gear connecting groove (10) is provided on the side of the outer vessel body (1-2). One end of the rotating gear (9) is located in the gear connecting groove (10). A rack (11) is provided on the outer periphery of the inner vessel body (1-1). The rotating gear (9) meshes with the rack (11). The reaction vessel body (1) is also provided with a sealing cover (12). The size of the sealing cover (12) corresponds to the size of the outer vessel body (1-2). The sealing cover (12) is provided with fixing plates (13) on the left and right sides respectively. The sealing cover (12) is provided with a spring base (14) in the middle of its interior. The bottom of the spring base (14) is connected to a spring (15). The bottom of the spring (15) is connected to an inner vessel sealing plate (16). The bottom of the inner vessel sealing plate (16) is provided with sealing blocks (17). The top of the inner vessel body (1-2) is provided with sealing grooves (18). The bottom of the inner vessel sealing plate (16) is connected to a stirring rod (19). A heating module (20) is installed inside the outer vessel body (1-2).

2. The polymerization reactor for preparing hydroxyl silicone oil according to claim 1, characterized in that, A temperature sensor (21) with display function is provided on the sealing cover (12).

3. The polymerization reactor for preparing hydroxyl silicone oil according to claim 1, characterized in that, The bottom of the inner vessel sealing plate (16) is connected to multiple stirring rods (19), and the multiple stirring rods (19) are provided with connecting rods (22).

4. The polymerization reactor for preparing hydroxyl silicone oil according to claim 1, characterized in that, The inner vessel sealing plate (16) has an exhaust hole (23) in the middle, and an exhaust pipe (24) is connected to the exhaust hole (23). The exhaust pipe (24) passes through the middle of the spring (15) and through the sealing cover (12). One end of the exhaust pipe (24) is connected to a vacuum machine (25).

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