Equipment and method for producing sodium trifluoroacetate

Abstract

This invention relates to the field of sodium trifluoroacetate production, and discloses a production equipment and method for sodium trifluoroacetate. The equipment includes a base plate, a reaction vessel fixedly connected to the top left side of the base plate, a heating and concentrating tank fixedly connected to the center surface of the base plate, and a centrifuge tank fixedly connected to the right side surface of the base plate. A drain valve is provided at the bottom of the outer wall of the centrifuge tank, and an exhaust valve is provided at the top of the heating and concentrating tank. A top cover is detachably installed on the top of the outer wall of the centrifuge tank via bolts. In this invention, a sliding plate drives a rack and gear linkage to drive a rotating valve plate to quantitatively control the amount of raw material stored in the liquid tank, avoiding the proportional errors of traditional manual feeding and ensuring that trifluoroacetic acid and sodium hydroxide react in the optimal ratio. Simultaneously, the discharge pipe b reciprocates through a connecting rod assembly, and with the flexible deformation of the corrugated hose, the raw material is evenly sprayed onto the inner wall of the reaction vessel, avoiding splashing and volatilization caused by direct impact on the liquid surface.

Description

Technical Field

[0001] This invention relates to the field of sodium trifluoroacetate production, and more particularly to a production equipment and method for sodium trifluoroacetate. Background Technology

[0002] Sodium trifluoroacetate, as an important fluorine-containing fine chemical, is widely used in pharmaceutical synthesis, pesticide preparation and new material research and development. Its production process mainly relies on the neutralization reaction of trifluoroacetic acid and sodium hydroxide, followed by concentration, crystallization and separation steps to complete the preparation.

[0003] The core reaction is an exothermic reaction in a highly corrosive system, which requires extremely high standards for the uniformity of raw material mixing, reaction temperature control, and product separation purity. The stability and efficiency of the equipment directly affect product quality and production efficiency.

[0004] Existing sodium trifluoroacetate production equipment has many limitations in practical applications: the raw material mixing process often adopts simple stirring or direct pouring, which can easily lead to excessively high local concentrations of trifluoroacetic acid and sodium hydroxide. This not only causes violent exothermic reactions and raw material volatilization losses, but also reduces the utilization rate of raw materials due to incomplete reactions, and may even produce by-products that affect purity. Therefore, a sodium trifluoroacetate production equipment and method are proposed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to solve the problems mentioned in the background art, and thus proposes a production equipment and method for sodium trifluoroacetate. This invention uses a sliding plate to drive a rack and gear linkage to drive a rotary valve to quantitatively control the amount of raw material stored in the tank, avoiding the proportional errors of traditional manual feeding, and ensuring that trifluoroacetic acid and sodium hydroxide react in the optimal ratio. At the same time, the liquid discharge pipe b achieves reciprocating oscillation through a connecting rod assembly, and with the flexible deformation of the corrugated hose, the raw material is evenly sprayed onto the inner wall of the reaction tank, avoiding splashing caused by direct impact on the liquid surface, which would lead to volatilization and violent heat release. Meanwhile, the stirring blade assembly achieves up-and-down oscillation of the stirring blade during rotation through the hinge structure of the protrusion and connecting block, and combined with the liquid distribution rod to divert the liquid, the mixing uniformity is greatly improved.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A sodium trifluoroacetate production device includes a base plate, a reaction tank fixedly connected to the top left side of the base plate, a heating and concentrating tank fixedly connected to the surface at the center of the base plate, a centrifuge tank fixedly connected to the right side of the base plate, a drain valve provided at the bottom of the outer wall of the centrifuge tank, an exhaust valve provided at the top of the heating and concentrating tank, a top cover detachably installed on the top of the outer wall of the centrifuge tank by bolts, a motor b fixedly connected to the bottom of the outer wall of the centrifuge tank, a positioning shaft fixedly connected to the output shaft of the motor b, a filter cylinder contacting the outer wall at the top of the positioning shaft, a high-efficiency mixing mechanism provided on the inner wall at the top of the reaction tank, and two sets of raw material storage tanks fixedly connected to the top of the outer wall of the reaction tank.

[0008] The high-efficiency mixing mechanism includes a motor a, the output shaft of which is fixedly connected to a rotating shaft. An annular corrugated groove is formed on the outer arc surface of the top of the rotating shaft. A cylindrical block is slidably connected to the inner wall of the annular corrugated groove. A sliding plate is fixedly connected to the end of the cylindrical block away from the annular corrugated groove. Two sets of sliding grooves are formed on the front surface of the sliding plate. A slider is slidably connected to the inner wall of the sliding groove. A connecting rod a is hinged to the surface of the slider. A rotating block is fixedly connected to the end of the connecting rod a away from the slider. A connecting rod b is fixedly connected to the bottom end of the outer wall of the rotating block. A sliding groove is formed on the surface of the connecting rod b. A protruding rod contacts the inner wall of the sliding groove of the connecting rod b. A lower liquid pipe b is fixedly connected to the rear end of the protruding rod. A corrugated hose is fixedly connected to the top end of the outer wall of the lower liquid pipe b. The lower liquid pipe a is fixedly connected to the top end of the outer wall of the corrugated hose. A stirring blade assembly is provided on the outer sidewall of the rotating shaft.

[0009] Preferably, the top of the outer wall of the sliding plate is fixedly connected to two sets of racks, and the outer walls of the two sets of racks are meshed with gears. The rotation center axis of the gear is fixedly connected to a connecting shaft, and a rotary valve plate is rotatably connected to the rotation center axis at the end of the connecting shaft away from the gear.

[0010] Preferably, the stirring blade assembly includes a protrusion, a connecting block is hinged to the inner sidewall of the protrusion, a stirring blade is fixedly connected to the end of the connecting block away from the protrusion, and multiple sets of through grooves are formed on the surface of the stirring blade, with a liquid separating rod fixedly connected to the inner wall of the through groove of the stirring blade.

[0011] Preferably, the motor a is fixedly connected to the center of the top surface of the reaction vessel, and the rotating shaft is rotatably connected to the center of the inner sidewall of the reaction vessel.

[0012] Preferably, a slot is provided at the center of the sliding plate, and the inner wall of the slot is in contact with the outer surface of the rotating shaft.

[0013] Preferably, the top end of the outer wall of the filter cylinder contacts the bottom end of the outer wall of the top cover, the outer arc surface of the filter cylinder contacts the inner side wall of the centrifuge tank, and the positioning shaft is rotatably connected to the center of the bottom end of the centrifuge tank.

[0014] Preferably, the lower liquid pipe a is fixedly connected to the top of the inner wall of the reaction vessel, the rotating block is rotatably connected to the outer side wall of the bottom end of the lower liquid pipe a, a set of booster pump A is provided between the reaction vessel and the heating and concentrating vessel, and another set of booster pump B is provided between the heating and concentrating vessel and the centrifuge vessel.

[0015] Preferably, the inner wall of the top of the reaction vessel is provided with a guide groove, the rack passes through and is slidably connected to the inner wall of the guide groove at the top of the reaction vessel, the connecting shaft passes through and is rotatably connected to the inner side wall of the raw material storage tank, and the outer side wall of the rotary valve plate is in contact with the inner side wall of the raw material storage tank.

[0016] Preferably, multiple sets of bumps are provided, and the bumps are fixedly connected to the outer arc surface of the rotating shaft.

[0017] A method for producing sodium trifluoroacetate includes the following steps:

[0018] S1: Raw material mixing reaction. Trifluoroacetic acid and sodium hydroxide are placed in two sets of raw material storage tanks at the top of the reaction tank. The motor a at the top of the reaction tank is started. Its output shaft drives the rotating shaft to rotate. The annular corrugated groove on the outer arc surface of the rotating shaft drives the cylindrical block to slide up and down back and forth, thereby driving the sliding plate to move up and down synchronously along the rotating shaft. The two sets of racks at the top of the sliding plate slide in the guide groove on the inner wall of the top of the reaction tank, providing guidance for the movement of the sliding plate.

[0019] When the rack moves up and down, it meshes with the gear and rotates. The gear drives the rotary valve plate in the raw material storage tank to rotate through the connecting shaft, realizing the quantitative feeding of raw materials. The raw materials enter the lower liquid pipe b through the lower liquid pipe a and the corrugated hose. At the same time, as the sliding plate moves up and down, the slider moves in its groove. Through the connecting rod a, the rotating block rotates, and the rotating block drives the connecting rod b to rotate, so that the convex rod slides in the groove of the connecting rod b, thereby driving the lower liquid pipe b to swing back and forth, and spraying the raw materials evenly on the inner side wall of the reaction tank.

[0020] The stirring blade assembly on the outside of the rotating shaft works synchronously. The protrusion rotates with the rotating shaft, causing the connecting block to swing up and down, so that the inclined stirring blade swings up and down while rotating. Together with the liquid separator in the stirring blade groove, the sprayed raw material is fully mixed with the liquid in the reaction tank, accelerating the reaction of trifluoroacetic acid and sodium hydroxide to generate sodium trifluoroacetate solution.

[0021] S2: Heating and Concentration. After the raw materials in the reaction tank have been mixed and reacted, start the booster pump A between the reaction tank and the heating and concentration tank to transport the mixed liquid after the reaction to the heating and concentration tank. Heat the mixed liquid in the heating and concentration tank to evaporate the water in the mixed liquid and form steam. At this time, open the exhaust valve at the top of the heating and concentration tank to discharge the steam in time to maintain the pressure inside the tank. Continue heating to concentrate the mixed liquid and finally form a thick liquid containing sodium trifluoroacetate crystals.

[0022] S3: After centrifugal separation and concentration, start the booster pump B between the heating concentration tank and the centrifuge tank to transport the concentrated liquid to the filter cartridge inside the centrifuge tank. Close the top cover of the centrifuge tank and fix it to the top of the outer wall of the centrifuge tank with bolts. Start the motor b at the bottom of the outer wall of the centrifuge tank. Its output shaft drives the positioning shaft to rotate. Since the cross groove at the bottom of the filter cartridge matches the top of the positioning shaft, the positioning shaft will drive the filter cartridge to rotate synchronously.

[0023] Under the action of centrifugal force, the mother liquor in the thick liquid is thrown to the inner side wall of the centrifuge tank through the pores of the filter cartridge. Then, the drain valve at the bottom of the outer wall of the centrifuge tank is opened to drain the mother liquor. After centrifugation, the bolts connecting the top cover and the centrifuge tank are removed using a special tool, the top cover is removed, and then the filter cartridge is taken out of the centrifuge tank to obtain sodium trifluoroacetate crystals.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. This invention uses a sliding plate to drive a rack and gear linkage, which drives a rotary valve to quantitatively control the amount of raw material stored in the tank. This avoids the proportional errors of traditional manual feeding and ensures that trifluoroacetic acid and sodium hydroxide react in the optimal ratio. At the same time, the liquid discharge pipe b achieves reciprocating oscillation through a connecting rod assembly. Combined with the flexible deformation of the corrugated hose, the raw material is evenly sprayed onto the inner wall of the reaction tank, avoiding splashing caused by direct impact on the liquid surface, which would lead to volatilization and violent exothermic reaction.

[0026] 2. The present invention achieves up-and-down oscillation of the stirring blade during rotation through the hinge structure of the protrusion and the connecting block of the stirring blade assembly. Combined with the liquid-diverting effect of the liquid-diverting rod, the mixing uniformity is greatly improved.

[0027] 3. This invention uses a heated concentration tank and a vent valve to precisely control steam emission, maintaining stable pressure inside the tank. Combined with the quantitative delivery of two sets of booster pumps, it ensures that the solution concentration rises uniformly and the crystal particles are of consistent size during the concentration process. In the centrifugal separation stage, the filter cartridge is precisely engaged with the positioning shaft through a cross groove, and high-speed stable rotation is achieved under the drive of motor b. The mother liquor is quickly separated through the filter cartridge pores and discharged centrally through the drain valve. The independent design of the detachable top cover and the filter cartridge facilitates the rapid removal of crystals and reduces impurity contamination.

[0028] 4. The present invention has a production method that connects each step of the process, from raw material mixing and heating concentration to centrifugal separation, and completes the process automatically, reducing manual intervention and improving the stability and consistency of production. At the same time, the equipment can be adjusted according to different production needs, and has strong adaptability, which can meet the production of sodium trifluoroacetate of different scales and purity requirements. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the device in this invention;

[0030] Figure 2 This is a partial cross-sectional view of the centrifuge tank in the device of the present invention;

[0031] Figure 3 This is a partial cross-sectional view of the reaction vessel in the device of the present invention;

[0032] Figure 4 This is a partial cross-sectional view of the reaction tank and raw material storage tank of the equipment in this invention;

[0033] Figure 5 This is a schematic diagram of the structure of the device in the present invention with the sliding plate and the rotating shaft separated.

[0034] Figure 6 This is a top view of the sliding plate structure of the device in this invention;

[0035] Figure 7 This is a partial cross-sectional view of the raw material storage tank in the device of the present invention;

[0036] Figure 8 This is a three-dimensional structural diagram of the stirring blade assembly of the device in this invention.

[0037] The components are as follows: 1. Base plate; 2. Reaction vessel; 3. Heating and concentrating vessel; 4. Exhaust valve; 5. Centrifuge tank; 6. Drain valve; 7. Top cover; 8. Booster pump A; 9. High-efficiency mixing mechanism; 901. Motor a; 902. Rotating shaft; 903. Annular corrugated groove; 904. Stirring blade assembly; 9041. Protrusion; 9042. Connecting block; 9043. Stirring blade; 9044. Separating rod; 905. Sliding plate. 906. Rack; 907. Slider; 908. Connecting rod a; 909. Lower liquid pipe a; 910. Corrugated hose; 911. Lower liquid pipe b; 912. Protruding rod; 913. Rotary block; 914. Connecting rod b; 915. Cylindrical block; 916. Rotary valve plate; 917. Connecting shaft; 918. Gear; 10. Motor b; 11. Positioning shaft; 12. Filter cartridge; 13. Raw material storage tank; 14. Booster pump B. Detailed Implementation

[0038] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0039] like Figures 1-3 As shown, one embodiment of the present invention provides a sodium trifluoroacetate production device, including a base plate 1. A reaction tank 2 is fixedly connected to the top left side of the base plate 1, a heating and concentrating tank 3 is fixedly connected to the surface at the center of the base plate 1, and a centrifuge tank 5 is fixedly connected to the surface on the right side of the base plate 1. By setting the base plate 1, the reaction tank 2, the heating and concentrating tank 3, and the centrifuge tank 5 can be stably supported for the production of sodium trifluoroacetate. A set of booster pumps A8 is set between the reaction tank 2 and the heating and concentrating tank 3, and another set of booster pumps B14 is set between the heating and concentrating tank 3 and the centrifuge tank 5. By setting two sets of booster pumps A8 and B14, the raw materials after the reaction in the reaction tank 2 are transported to the interior of the heating and concentrating tank 3 for heating and concentration. After concentration, the raw materials are transported by the right-side booster pump B14 to the interior of the centrifuge tank 5 for centrifugation and drying to separate the mother liquor from the crystals.

[0040] like Figure 1 and Figure 2 and Figure 5As shown, a drain valve 6 is provided at the bottom of the outer wall of the centrifuge tank 5. By opening the drain valve 6, the mother liquor after centrifugation inside the centrifuge tank 5 can be discharged. An exhaust valve 4 is provided at the top of the heating and concentrating tank 3. The steam generated after heating the original liquid inside the heating and concentrating tank 3 is discharged. A top cover 7 is detachably installed at the top of the outer wall of the centrifuge tank 5 by bolts. The top cover 7 can be removed by repeatedly rotating the bolts with a special tool, so as to facilitate the removal of the crystals inside the filter cylinder 12 after centrifugation and filtration. A motor b10 is fixedly connected to the bottom of the outer wall of the centrifuge tank 5. The output shaft of the motor b10 is fixedly connected to a positioning shaft 11. The positioning shaft 11 is rotatably connected to the center of the bottom of the centrifuge tank 5. The outer wall of the top of the positioning shaft 11 contacts the filter cylinder 12. The bottom of the filter cylinder 12 is provided with a fitting part for the positioning shaft 11. The cross groove of filter cylinder 12 allows it to contact the top of positioning shaft 11 when it is installed inside centrifuge tank 5. This causes the positioning shaft 11 to rotate synchronously with the filter cylinder 12, thereby centrifuging and drying the raw liquid inside to separate the mother liquor from the crystals. The top of the outer wall of filter cylinder 12 contacts the bottom of the outer wall of top cover 7, and the outer arc surface of filter cylinder 12 contacts the inner side wall of centrifuge tank 5. The inner wall of the top of reaction tank 2 is equipped with a high-efficiency mixing mechanism 9. The top of the outer wall of reaction tank 2 is fixedly connected to two sets of raw material storage tanks 13. By setting two sets of raw material storage tanks 13, the two raw materials of sodium trifluoroacetate, trifluoroacetic acid and sodium hydroxide, can be conveniently placed separately. The top of reaction tank 2 is provided with a feed inlet, which is connected to the bottom of the raw material storage tank 13 and the liquid outlet pipe a909.

[0041] like Figures 4-6As shown, the high-efficiency mixing mechanism 9 includes a motor a901. The output shaft of the motor a901 is fixedly connected to a rotating shaft 902. The motor a901 is fixedly connected to the center of the top surface of the reaction vessel 2. The rotating shaft 902 is rotatably connected to the center of the inner sidewall of the reaction vessel 2. When the motor a901 starts, it drives the rotating shaft 902 to rotate synchronously. An annular corrugated groove 903 is formed on the outer arc surface of the top of the rotating shaft 902. A cylindrical block 915 is slidably connected to the inner wall of the annular corrugated groove 903. The inner diameter of the annular corrugated groove 903 matches the outer diameter of the cylindrical block 915, so that when the rotating shaft 902 rotates, it drives the cylindrical block 915 to slide back and forth inside the annular corrugated groove 903. The cylindrical block 915 moves away from the inner side of the annular corrugated groove 903. A sliding plate 905 is fixedly connected to one end of an annular corrugated groove 903. A slot is formed at the center of the sliding plate 905. The inner wall of the slot is in contact with the outer surface of the rotating shaft 902. When the cylindrical block 915 slides back and forth inside the annular corrugated groove 903, it also drives the sliding plate 905 to move up and down synchronously on the outer surface of the rotating shaft 902. Two sets of sliding grooves are formed on the front surface of the sliding plate 905. A slider 907 is slidably connected to the inner wall of the sliding groove of the sliding plate 905. A connecting rod a908 is hinged to the surface of the slider 907. A rotating block 913 is fixedly connected to the end of the connecting rod a908 away from the slider 907. A connecting rod b914 is fixedly connected to the bottom end of the outer wall of the rotating block 913. A groove is provided on the surface of the sliding plate 905. The inner wall of the groove of the connecting rod b914 contacts the protruding rod 912. The rear end of the protruding rod 912 is fixedly connected to the lower liquid pipe b911. During the up-and-down movement of the sliding plate 905, the rotating block 913 is hinged to the outer diameter of the lower liquid pipe a909. As the sliding plate 905 descends, the slider 907 moves within its groove. At the same time, the connecting rod a908 hinged to the surface of the slider 907 drives the rotating block 913 to rotate. During the rotation of the rotating block 913, the connecting rod b914 fixed at its bottom end rotates synchronously around the rotation center point of the rotating block 913. This causes the protruding rod 912 to slide on the inner wall of the groove of the connecting rod b914, thereby causing the lower liquid pipe b911 to reciprocate. This allows the original liquid inside to be sprayed back and forth on the inner sidewall of the reaction tank 2, avoiding direct splashing contact with the original liquid inside, thus preventing a reaction. A corrugated hose 910 is fixedly connected to the top of the outer wall of the lower liquid pipe b911, and a lower liquid pipe a909 is fixedly connected to the top of the outer wall of the corrugated hose 910. The corrugated hose 910 is made of metal braided mesh, which has a deformation effect, so that when the protruding rod 912 drives the lower liquid pipe b911 to swing back and forth, the corrugated hose 910 will bend. The lower liquid pipe a909 is fixedly connected to the top of the inner wall of the reaction tank 2, and the rotating block 913 is rotatably connected to the outer sidewall of the bottom end of the lower liquid pipe a909. A stirring blade assembly 904 is provided on the outer sidewall of the rotating shaft 902.

[0042] like Figure 4 , Figure 5 and Figure 7 As shown, two sets of racks 906 are fixedly connected to the top of the outer wall of the sliding plate 905. A guide groove is provided on the inner wall of the top of the reaction vessel 2. The racks 906 pass through and are slidably connected to the inner wall of the guide groove at the top of the reaction vessel 2. By fixing two sets of racks 906 to the top of the sliding plate 905, and allowing them to slide up and down only on the inner wall of the top of the reaction vessel 2, the up and down movement of the sliding plate 905 can be guided. Gears 918 are meshed on the outer walls of both sets of racks 906. A connecting shaft 917 is fixedly connected to the rotation center axis of the gears 918. When the racks 906 reciprocate up and down with the sliding plate 905, they mesh with the gears. Gear 918 rotates, and a rotary valve plate 916 is rotatably connected to the central axis of the connecting shaft 917 away from gear 918. The connecting shaft 917 passes through and is rotatably connected to the inner side wall of the raw material storage tank 13. The outer side wall of the rotary valve plate 916 is in contact with the inner side wall of the raw material storage tank 13. When gear 918 is reciprocated up and down by rack 906, it will drive the connecting shaft 917 to rotate, thereby driving the rotary valve plate 916 to rotate inside the raw material storage tank 13, thereby quantitatively dispensing the raw liquid inside, avoiding excessive material dispensing at one time, which would lead to errors in the mixing ratio and low processing efficiency.

[0043] like Figure 3 and Figure 8 As shown, the stirring blade assembly 904 includes a protrusion 9041, and multiple sets of protrusions 9041 are provided. The protrusions 9041 are fixedly connected to the outer arc surface of the rotating shaft 902. A connecting block 9042 is hinged to the inner sidewall of the protrusion 9041. The connecting block 9042 can only rotate up and down on the inner sidewall of the protrusion 9041. A stirring blade 9043 is fixedly connected to the end of the connecting block 9042 away from the protrusion 9041. The stirring blade 9043 is fixedly fixed to the surface of the connecting block 9042 in an inclined manner. The surface of the stirring blade 9043 is open. Multiple sets of through grooves are provided. A liquid separating rod 9044 is fixedly connected to the inner wall of the through groove of the stirring blade 9043. When the rotating shaft 902 rotates, it will drive multiple sets of protrusions 9041 to rotate synchronously. At the same time, the connecting block 9042 can only swing up and down on the inner side of the protrusion 9041, thereby driving multiple sets of inclined stirring blades 9043 to rotate and swing up and down at the same time. Furthermore, the liquid separating rod 9044 is installed in the through groove on the surface of the stirring blade 9043, which makes the mixing effect of trifluoroacetic acid and sodium hydroxide better.

[0044] Working principle: The base plate 1 serves as the supporting foundation of the equipment. The reaction tank 2 is fixed at the top left, the heating and concentrating tank 3 is fixed at the center, and the centrifuge tank 5 is fixed on the right surface, providing stable support for the three and ensuring the stability of the equipment structure during production. Booster pumps A8 and B14 are installed between the reaction tank 2 and the heating and concentrating tank 3, and between the heating and concentrating tank 3 and the centrifuge tank 5. The two sets together constitute the power core for material transportation: the left booster pump A8 pumps the raw materials mixed and reacted in the reaction tank 2 into the heating and concentrating tank 3, while the right booster pump B14 transports the concentrated raw materials to the centrifuge tank 5, realizing the orderly flow of materials between each process.

[0045] Two sets of raw material storage tanks 13 on the outer wall of the top of the reaction tank 2 store trifluoroacetic acid and sodium hydroxide respectively. They are connected to the bottom of the raw material storage tanks 13 through the feed inlet at the top of the reaction tank 2, providing a channel for the input of raw materials. The efficient mixing mechanism 9 inside achieves precise mixing.

[0046] After the motor a901 starts, it drives the rotating shaft 902 to rotate. The annular corrugated groove 903 on the outer arc surface of the top of the rotating shaft 902 drives the cylindrical block 915 to slide up and down reciprocally, thereby causing the sliding plate 905 to move up and down synchronously along the rotating shaft 902. The central slot of the sliding plate 905 contacts the outer surface of the rotating shaft 902, and in conjunction with the rack 906 at its top that penetrates the guide groove of the reaction vessel 2, it provides guidance for the movement of the sliding plate 905 and ensures the stability of the movement. When the sliding plate 905 moves up and down, the slider 907 in the front sliding groove drives the connecting rod a908 to swing, causing the rotating block 913 to rotate at the bottom of the lower liquid pipe a909, and then through the connecting rod The cooperation between b914 and the protruding rod 912 drives the lower liquid pipe b911 to swing back and forth. The corrugated hose 910 at the top of the lower liquid pipe b911 is made of metal braided mesh and can bend with the swing, so that the raw material is sprayed back and forth on the inner side wall of the reaction tank 2 through the lower liquid pipe b911, avoiding direct impact on the liquid in the tank and causing splashing. At the same time, the rack 906 at the top of the sliding plate 905 meshes with the gear 918 to rotate. The gear 918 drives the rotary valve plate 916 in the raw material storage tank 13 to rotate through the connecting shaft 917. The rotary valve plate 916 contacts the inner side wall of the raw material storage tank 13, and its rotation realizes the quantitative feeding of raw materials and avoids the imbalance of proportion.

[0047] The stirring blade assembly 904 on the outside of the rotating shaft 902 enhances mixing: the protrusion 9041 rotates with the rotating shaft 902, driving the connecting block 9042 to swing up and down, so that the inclined stirring blade 9043 swings up and down while rotating. In conjunction with the liquid separating rod 9044 in the channel of the stirring blade 9043, the sprayed raw material is fully mixed with the liquid in the tank, accelerating the reaction to generate sodium trifluoroacetate solution.

[0048] The mixture after the reaction is completed enters the heating and concentrating tank 3 via the booster pump A8 on the left. The mixture is heated inside the tank, causing the water to evaporate and form steam. The exhaust valve 4 at the top of the heating and concentrating tank 3 can release the steam in time, maintain the pressure inside the tank, and promote the concentration of the mixture into a thick liquid containing sodium trifluoroacetate crystals.

[0049] The concentrated liquid is fed into the filter cartridge 12 inside the centrifuge tank 5 by the booster pump B14 on the right. The motor b10 at the bottom of the centrifuge tank 5 is started, and the output shaft drives the filter cartridge 12 to rotate through the positioning shaft 11. The cross groove at the bottom of the filter cartridge 12 fits with the top of the positioning shaft 11 to ensure synchronous rotation. Under the action of centrifugal force, the mother liquor is thrown to the inner wall of the centrifuge tank 5 through the pores of the filter cartridge 12 and finally discharged through the bottom drain valve 6. Sodium trifluoroacetate crystals remain in the filter cartridge 12. After centrifugation, the top cover 7 bolt connection at the top of the centrifuge tank 5 is removed with a special tool to take out the crystals in the filter cartridge 12, thus completing the separation.

[0050] This embodiment also provides a method for producing sodium trifluoroacetate, including the following steps:

[0051] S1: Raw material mixing reaction. Trifluoroacetic acid and sodium hydroxide are placed in two sets of raw material storage tanks 13 at the top of the reaction tank 2. The motor a901 at the top of the reaction tank 2 is started. Its output shaft drives the rotating shaft 902 to rotate. The annular corrugated groove 903 on the outer arc surface at the top of the rotating shaft 902 drives the cylindrical block 915 to slide up and down repeatedly, thereby driving the sliding plate 905 to move up and down synchronously along the rotating shaft 902. The two sets of racks 906 at the top of the sliding plate 905 slide in the guide groove on the inner wall of the top of the reaction tank 2, providing guidance for the movement of the sliding plate 905.

[0052] When the rack 906 moves up and down, it meshes with the gear 918 to rotate. The gear 918 drives the rotary valve plate 916 in the raw material storage tank 13 to rotate through the connecting shaft 917, so as to realize the quantitative feeding of raw materials. The raw materials enter the lower liquid pipe b911 through the lower liquid pipe a909 and the corrugated hose 910. At the same time, during the up and down movement of the sliding plate 905, the slider 907 moves in its groove, which drives the rotating block 913 to rotate through the connecting rod a908. The rotating block 913 drives the connecting rod b914 to rotate, so that the convex rod 912 slides in the groove of the connecting rod b914, thereby driving the lower liquid pipe b911 to swing back and forth, so as to spray the raw materials evenly on the inner side wall of the reaction tank 2.

[0053] The stirring blade assembly 904 on the outside of the rotating shaft 902 works synchronously. The protrusion 9041 rotates with the rotating shaft 902, driving the connecting block 9042 to swing up and down, so that the inclined stirring blade 9043 swings up and down while rotating. In conjunction with the liquid separating rod 9044 in the channel of the stirring blade 9043, the sprayed raw material is fully mixed with the liquid in the reaction tank 2, accelerating the reaction of trifluoroacetic acid and sodium hydroxide to generate sodium trifluoroacetate solution.

[0054] S2: Heating and Concentration. After the raw materials in the reaction tank 2 have been mixed and reacted, the booster pump A8 between the reaction tank 2 and the heating and concentration tank 3 is started to transport the mixed liquid after the reaction to the heating and concentration tank 3. The mixed liquid in the heating and concentration tank 3 is heated to evaporate the water in the mixed liquid and form steam. At this time, the exhaust valve 4 at the top of the heating and concentration tank 3 is opened to release the steam in time to maintain the pressure inside the tank. The heating continues to concentrate the mixed liquid and finally forms a thick liquid containing sodium trifluoroacetate crystals.

[0055] S3: After centrifugal separation and concentration, start the booster pump B14 between the heating concentration tank 3 and the centrifuge tank 5 to transport the concentrated liquid to the filter cartridge 12 inside the centrifuge tank 5. Close the top cover 7 of the centrifuge tank 5 and fix it to the top of the outer wall of the centrifuge tank 5 with bolts. Start the motor b10 at the bottom of the outer wall of the centrifuge tank 5. Its output shaft drives the positioning shaft 11 to rotate. Since the cross groove at the bottom of the filter cartridge 12 fits with the top of the positioning shaft 11, the positioning shaft 11 will drive the filter cartridge 12 to rotate synchronously.

[0056] Under the action of centrifugal force, the mother liquor in the thick liquid is thrown to the inner side wall of the centrifuge tank 5 through the pores of the filter cylinder 12. Then, the drain valve 6 at the bottom of the outer wall of the centrifuge tank 5 is opened to drain the mother liquor. After centrifugation, the bolts connecting the top cover 7 and the centrifuge tank 5 are removed using a special tool. The top cover 7 is then removed, and the filter cylinder 12 is taken out of the centrifuge tank 5 to obtain sodium trifluoroacetate crystals.

[0057] In the description of this invention, the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only to describe the invention and not to require the invention to be constructed or operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected" and "linked" in this invention should be interpreted broadly. For example, they can refer to a connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms based on the specific circumstances.

[0058] The above description represents the preferred mode of operation of the present invention. The specific operational modes are provided solely for a better understanding of the invention's concept. Those skilled in the art can make various improvements or equivalent substitutions based on the principles of this invention, and these improvements or equivalent substitutions are also considered to fall within the scope of protection of this invention.

Claims

1. A production apparatus for sodium trifluoroacetate, comprising a base plate, characterized in that: A reaction vessel is fixedly connected to the top left side of the base plate, a heating and concentrating vessel is fixedly connected to the middle surface of the base plate, a centrifuge vessel is fixedly connected to the right side surface of the base plate, a high-efficiency mixing mechanism is provided on the inner wall of the top of the reaction vessel, and two sets of raw material storage tanks are fixedly connected to the top of the outer wall of the reaction vessel. The high-efficiency mixing mechanism includes a motor a, the output shaft of which is fixedly connected to a rotating shaft. An annular corrugated groove is formed on the outer arc surface of the top end of the rotating shaft. A cylindrical block is slidably connected to the inner wall of the annular corrugated groove. A sliding plate is fixedly connected to the end of the cylindrical block away from the annular corrugated groove. Two sets of sliding grooves are formed on the front surface of the sliding plate. A slider is slidably connected to the inner wall of the sliding groove. A connecting rod a is hinged to the surface of the slider. A rotating block is fixedly connected to the end of the connecting rod a away from the slider. A connecting rod b is fixedly connected to the bottom end of the outer wall of the rotating block. A sliding groove is formed on the surface of the connecting rod b. The inner wall of the connecting rod b slide groove contacts a protruding rod, the rear end of the protruding rod is fixedly connected to a lower liquid pipe b, the top end of the outer wall of the lower liquid pipe b is fixedly connected to a corrugated hose, the top end of the outer wall of the corrugated hose is fixedly connected to a lower liquid pipe a, and the outer side wall of the rotating shaft is provided with a stirring blade assembly; the bottom end of the outer wall of the centrifuge tank is provided with a drain valve, the top end of the heating concentration tank is provided with an exhaust valve, the top end of the outer wall of the centrifuge tank is provided with a top cover, the bottom end of the outer wall of the centrifuge tank is fixedly connected to a motor b, the output shaft of the motor b is fixedly connected to a positioning shaft, and a filter cylinder is provided on the outer side of the top end of the positioning shaft; Two sets of racks are fixedly connected to the top of the outer wall of the sliding plate. Gears mesh on the outer walls of both sets of racks. A connecting shaft is fixedly connected to the rotation center axis of the gears. A rotary valve plate is rotatably connected to the end of the connecting shaft away from the gear at the rotation center axis. The stirring blade assembly includes a protrusion. A connecting block is hinged to the inner side wall of the protrusion. A stirring blade is fixedly connected to the end of the connecting block away from the protrusion. Multiple through grooves are formed on the surface of the stirring blade. A liquid separator is fixedly connected to the inner wall of the through groove. A slot is formed at the center of the sliding plate. The inner wall of the slot is in contact with the outer surface of the rotating shaft. A guide groove is formed on the inner wall of the top of the reaction tank. The rack passes through and is slidably connected to the inner wall of the guide groove at the top of the reaction tank. The connecting shaft passes through and is rotatably connected to the inner side wall of the raw material storage tank. The outer side wall of the rotary valve plate is in contact with the inner side wall of the raw material storage tank.

2. The sodium trifluoroacetate production equipment according to claim 1, characterized in that: The motor a is fixedly connected to the center of the top surface of the reaction vessel, and the rotating shaft is rotatably connected to the center of the inner sidewall of the reaction vessel.

3. The sodium trifluoroacetate production equipment according to claim 1, characterized in that: The top of the outer wall of the filter cylinder contacts the bottom of the outer wall of the top cover, the outer arc surface of the filter cylinder contacts the inner side wall of the centrifuge tank, and the positioning shaft is rotatably connected to the center of the bottom of the centrifuge tank.

4. The sodium trifluoroacetate production equipment according to claim 1, characterized in that: The lower liquid pipe a is fixedly connected to the top of the inner wall of the reaction vessel, and the rotating block is rotatably connected to the outer side wall of the bottom end of the lower liquid pipe a. A set of booster pump A is provided between the reaction vessel and the heating and concentrating vessel, and another set of booster pump B is provided between the heating and concentrating vessel and the centrifuge vessel.

5. The sodium trifluoroacetate production equipment according to claim 1, characterized in that: The bumps are provided in multiple sets, and the bumps are fixedly connected to the outer arc surface of the rotating shaft.

6. A method for producing sodium trifluoroacetate, based on the equipment for producing sodium trifluoroacetate according to any one of claims 1-5, characterized in that, Includes the following steps: S1: Raw material mixing reaction. First, trifluoroacetic acid and sodium hydroxide are placed in two sets of raw material storage tanks at the top of the reaction tank. The motor a at the top of the reaction tank is started. Its output shaft drives the rotating shaft to rotate. The annular corrugated groove on the outer arc surface of the rotating shaft drives the cylindrical block to slide up and down back and forth, thereby driving the sliding plate to move up and down synchronously along the rotating shaft. The two sets of racks at the top of the sliding plate slide in the guide groove on the inner wall of the top of the reaction tank, providing guidance for the movement of the sliding plate. When the rack moves up and down, it meshes with the gear and rotates. The gear drives the rotary valve plate in the raw material storage tank to rotate through the connecting shaft, realizing the quantitative feeding of raw materials. The raw materials enter the lower liquid pipe b through the lower liquid pipe a and the corrugated hose. At the same time, as the sliding plate moves up and down, the slider moves in its groove. Through the connecting rod a, the rotating block rotates, and the rotating block drives the connecting rod b to rotate, so that the convex rod slides in the groove of the connecting rod b, thereby driving the lower liquid pipe b to swing back and forth, and spraying the raw materials evenly on the inner side wall of the reaction tank. The stirring blade assembly on the outside of the rotating shaft works synchronously. The protrusion rotates with the rotating shaft, causing the connecting block to swing up and down, so that the inclined stirring blade swings up and down while rotating. Together with the liquid separator in the stirring blade groove, the sprayed raw material is fully mixed with the liquid in the reaction tank, accelerating the reaction of trifluoroacetic acid and sodium hydroxide to generate sodium trifluoroacetate solution. S2: Heating and Concentration. After the raw materials in the reaction tank have been mixed and reacted, start the booster pump A between the reaction tank and the heating and concentration tank to transport the mixed liquid after the reaction to the heating and concentration tank. Heat the mixed liquid in the heating and concentration tank to evaporate the water in the mixed liquid and form steam. At this time, open the exhaust valve at the top of the heating and concentration tank to discharge the steam in time to maintain the pressure inside the tank. Continue heating to concentrate the mixed liquid and finally form a thick liquid containing sodium trifluoroacetate crystals. S3: After centrifugal separation and concentration, start the booster pump B between the heating concentration tank and the centrifuge tank to transport the concentrated liquid to the filter cartridge inside the centrifuge tank. Close the top cover of the centrifuge tank and fix it to the top of the outer wall of the centrifuge tank with bolts. Start the motor b at the bottom of the outer wall of the centrifuge tank. Its output shaft drives the positioning shaft to rotate. Since the cross groove at the bottom of the filter cartridge matches the top of the positioning shaft, the positioning shaft will drive the filter cartridge to rotate synchronously. Under the action of centrifugal force, the mother liquor in the thick liquid is thrown to the inner side wall of the centrifuge tank through the pores of the filter cartridge. Then, the drain valve at the bottom of the outer wall of the centrifuge tank is opened to drain the mother liquor. After centrifugation, the bolts connecting the top cover and the centrifuge tank are removed using a special tool, the top cover is removed, and then the filter cartridge is taken out of the centrifuge tank to obtain sodium trifluoroacetate crystals.

Images