Reaction equipment and reaction method for preparing low-sodium aluminum sol

Abstract

The invention discloses reaction equipment for preparing low-sodium aluminum sol, and relates to the technical field of chemical equipment, the reaction equipment comprises a reaction kettle, and the reaction kettle is internally provided with an inner cavity for aluminum sol preparation reaction. The invention further discloses a reaction method of the reaction equipment for preparing the low-sodium aluminum sol. The reaction method comprises the following steps of aluminum sol generation, aluminum sol transfer, product discharge and back flushing. The reaction kettle, the fixed cover and the annular cover are arranged, metal aluminum and hydrochloric acid react in the reaction kettle to generate a colloidal solution of aluminum sol, the colloidal solution of the aluminum sol is in a nano-particle state after generation, and the colloidal solution of the aluminum sol is directly transferred into the annular cover at the moment; the aluminum sol colloidal solution in the nano-particle state passes through the ion exchange column in the annular cover, sodium ions in the aluminum sol colloidal solution are adsorbed and separated by the strong-acid cation exchange resin in the ion exchange column, and therefore the low-sodium aluminum sol can be obtained.

Description

Technical Field

[0001] This invention relates to the field of chemical equipment technology, and in particular to a reaction apparatus and reaction method for preparing low-sodium aluminum sol. Background Technology

[0002] Aluminum sol is an important inorganic colloidal material widely used in catalyst supports, ceramic binders, refractory material binders, paper sizing agents, and textile auxiliaries. Its core function lies in converting aluminum compounds into stable, dispersed nano- or submicron-sized hydrated alumina colloidal particles.

[0003] In existing technologies, aluminum sol is prepared by a continuous reaction of hydrochloric acid and metallic aluminum. The aluminum reacts with hydrochloric acid to produce aluminum chloride, which then hydrolyzes and polymerizes to form an aluminum sol colloid. However, during the preparation of aluminum sol by reacting hydrochloric acid with metallic aluminum, sodium impurities in the raw aluminum, sodium hydroxide used for acid-base adjustment, and sodium salts in the process water all carry sodium ions. These sodium ions mix with the aluminum sol colloid during its formation due to charge adsorption. For applications such as electronic packaging and high-temperature bonding, the migration of sodium ions within the aluminum sol can lead to performance degradation. Therefore, removing sodium ions from the aluminum sol during its preparation by reacting hydrochloric acid with metallic aluminum is crucial.

[0004] In existing technologies, sodium ions in alumina sol are generally removed by electrodialysis or resin adsorption. However, removing sodium ions from alumina sol by electrodialysis is costly, and the electrodialysis membrane needs to be cleaned regularly, resulting in high maintenance costs. When using resin adsorption to remove sodium ions from alumina sol, the alumina sol needs to be transported separately to the ion exchange column where the resin is stored after it is formed. During the transport process, the alumina sol colloids aggregate due to aging. After the agglomerates aggregate, they can easily clog the resin in the ion exchange column, causing irreversible damage to the ion exchange column.

[0005] Therefore, it is necessary to invent a reaction apparatus and reaction method for preparing low-sodium aluminum sol to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a reaction apparatus and method for preparing low-sodium aluminum sol, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a reaction apparatus for preparing low-sodium aluminum sol, comprising: A reaction vessel, wherein the interior of the reaction vessel is provided with an inner cavity for the aluminum sol preparation reaction; A fixed cover is provided at the top of the reactor and communicates with the inner cavity of the reactor. An annular cover is fixedly provided in the middle of the fixed cover. Multiple processing tanks are arranged around the inside of the annular cover. Circular through slots are provided at both ends of each processing tank. An ion exchange column is provided inside each processing tank. The two ends of each ion exchange column are respectively connected to two circular through slots. A transition cavity is provided at the top of the annular cover. The circular through slots at the top of the multiple processing tanks are connected to the transition cavity. Multiple extraction pipes are arranged around the inside of the annular cover, and the bottom ends of the extraction pipes are located inside the reactor. A return pipe is fixedly provided on the outside of the annular cover. One end of the return pipe is connected to the extraction pipe, and the other end of the return pipe is connected to the transition cavity. The aluminum sol colloidal solution generated in the reactor can enter the ion exchange column through the extraction pipe and the return pipe to complete the adsorption and desorption of sodium ions.

[0008] Preferably, a material pump is fixedly installed at the top of the outer wall of the fixed cover, a connecting pipe is fixedly installed at the input end of the material pump, multiple extraction pipes are connected to the connecting pipe, and the output end of the material pump is connected to the return pipe.

[0009] Preferably, the stirring rod is rotatably located at the top center of the fixed cover, and the top of the stirring rod is equipped with a forward and reverse motor. The forward and reverse motor is used to drive the stirring rod to rotate forward in the early stage of the reaction to complete the solution stirring, and the forward and reverse motor is used to drive the stirring rod to rotate in reverse in the later stage of the reaction to complete the colloid aggregation. The bottom end of the stirring rod is fixedly equipped with stirring blades, which are provided in two sets, upper and lower, and both sets of stirring blades are designed with an inclined structure. The guide plate is provided in multiple sets and arranged around the inside of the reactor. The guide plate is used in conjunction with the stirring rod to collect the aggregated aluminum sol colloidal particles.

[0010] Preferably, an extension plate is fixedly provided on the side of the guide plate away from the inner wall of the reactor, and an inclination angle is provided between the extension plate and the guide plate. An ear plate is fixedly provided on the side of the extension plate away from the guide plate, and an inclination angle is provided between the ear plate and the extension plate. Multiple material passage grooves are sequentially provided through the middle of the extension plate from bottom to top.

[0011] Preferably, a support rod is fixedly provided on the side of the guide plate near the reactor, and a positioning ring is sleeved on both ends of the support rod and fixed to the inner wall of the reactor. Multiple support blocks are fixedly provided on the side of the guide plate near the reactor. The support blocks are designed with an arc shape and are located on the side of the guide plate away from the extension plate.

[0012] Preferably, a cooling jacket is fixedly disposed inside the annular cover and is connected to the interior of the annular cover. Multiple material extraction tubes are disposed through the interior of the cooling jacket, and a second jacket nozzle is fixedly disposed on both sides of the top end of the cooling jacket.

[0013] Preferably, a plurality of heat-conducting fins are fixedly provided in the middle of the material extraction pipe, the plurality of heat-conducting fins are spiral structures, and the plurality of heat-conducting fins are all located inside the cooling jacket.

[0014] Preferably, a temperature control jacket is located on the outside of the reactor. The temperature control jacket is used to control the reaction temperature inside the reactor. First jacket nozzles are fixed on both sides of the temperature control jacket.

[0015] Preferably, a fixing seat is inserted into the opening of the treatment tank, and a circular slot is provided through the middle of the fixing seat. The ion exchange column is detachably inserted into the circular slot, and an observation window is provided through the outer side of the fixing seat. The fixing seat is used to install and fix the ion exchange column in the treatment tank. The bottom end of the annular cover is fixedly provided with a material storage chamber, the bottom end of the material storage chamber is fixedly provided with a discharge valve and a backflushing valve, and the bottom end of the outer wall of the transition chamber is fixedly provided with a waste discharge valve.

[0016] A reaction method for preparing low-sodium aluminum sol using a reaction apparatus includes the following steps: Step 1: Aluminum sol formation. Raw aluminum and hydrochloric acid are injected into the reaction vessel. The raw aluminum dissolves in the hydrochloric acid to form aluminum chloride. Water is then injected into the reaction vessel. The aluminum chloride undergoes hydrolysis and polymerization to form aluminum sol colloid. Sodium ion salts are mixed in the aluminum sol colloid formed during this process. Sodium hydroxide is added to the mixed solution to control the pH value between 2 and 3. Step 2: Aluminum sol transfer. The initially formed aluminum sol colloid is transported to the transition chamber through the extraction and return pipes. The aluminum sol colloid mixed solution in the transition chamber passes through multiple ion exchange columns. The sodium ion salt in the aluminum sol colloid solution is adsorbed by the strong acid cation exchange resin in the ion exchange column, so that the aluminum sol colloid solution is transformed into a low sodium aluminum sol colloid solution. Step 3: Product discharge. The low-sodium aluminum sol colloidal solution is discharged and guided to the aging tank for aging treatment. Step 4: Backflushing. Use dilute hydrochloric acid to backflush the ion exchange column to regenerate the strongly acidic cation exchange resin, thus completing one preparation cycle of low-sodium aluminum sol.

[0017] The technical effects and advantages of this invention are as follows: 1. This invention, through the setup of a reaction vessel, a fixed cover, and an annular cover, allows metallic aluminum and hydrochloric acid to react within the reaction vessel to generate a colloidal solution of aluminum sol. The aluminum sol colloid is in a nanoparticle state after generation. This solution is then directly transferred to the annular cover. The nanoparticle-state aluminum sol colloid solution passes through an ion exchange column within the annular cover, where sodium ions are adsorbed and separated by a strongly acidic cation exchange resin. This yields low-sodium aluminum sol. Compared to existing technologies, this solution achieves continuous aluminum sol preparation and sodium ion removal, preventing resin blockage in the ion exchange column due to aging and aggregation of the aluminum sol colloid during transport. This increases the yield of aluminum sol colloid while ensuring effective sodium ion removal. Furthermore, the device boasts high integration and low cost. 2. By setting up a cooling jacket, the aluminum sol colloidal solution passes through the cooling jacket during the transfer process. The refrigerant injected into the cooling jacket can quickly cool the aluminum sol colloidal solution, thereby inhibiting the aging of the aluminum sol colloidal solution. At the same time, the refrigerant jacket can also control the temperature of the environment where the ion exchange column is located, so as to ensure the working environment when the strongly acidic cation exchange resin adsorbs sodium ions, thus ensuring the removal effect of sodium ions in the aluminum sol colloidal solution. 3. This invention, by setting up an annular cover, a transition chamber, and a storage chamber, together form a transport channel for the aluminum sol colloid. When the aluminum sol colloid is transferred after its formation, some undissolved impurities are drawn into the transition chamber under centrifugal force. Undissolved impurities remain in the transition chamber because they cannot pass through the ion exchange column. After sodium ions are removed from the aluminum sol colloid, dilute hydrochloric acid can be injected through the storage chamber to backwash and regenerate the ion exchange column. During this process, the undissolved impurities remaining in the transition chamber can be discharged along with the backwash solution, thereby achieving simultaneous cleaning of residual impurities during the reaction process, facilitating continuous operation and production of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention.

[0020] Figure 3 This is a schematic diagram of the movement trajectory of the aluminum sol colloidal solution of the present invention.

[0021] Figure 4 This is a schematic diagram of the internal structure of the fixed cover of the present invention.

[0022] Figure 5 This is a cross-sectional schematic diagram of the fixed cover structure of the present invention.

[0023] Figure 6This is a schematic diagram of the internal structure of the reactor of the present invention.

[0024] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point A in the middle.

[0025] Figure 8 This is a schematic diagram of the guide plate structure of the present invention.

[0026] Figure 9 This is a schematic diagram of the ion exchange column and fixture structure of the present invention.

[0027] In the diagram: 1. Reactor; 2. Fixed cover; 3. Annular cover; 31. Processing tank; 32. Circular through-slot; 33. Ion exchange column; 3301. Fixed base; 3302. Circular slot; 3303. Observation window; 34. Transition chamber; 341. Waste discharge valve; 35. Feed pipe; 3501. Heat-conducting fins; 351. Connecting pipe; 352. Material pump; 36. Return pipe; 37. Storage chamber; 371. Discharge valve; 372. Backflush valve; 4. Cooling jacket; 41. Second jacket nozzle; 5. Stirring rod; 51. Forward and reverse motor; 52. Stirring blade; 6. Guide plate; 601. Support rod; 602. Positioning ring; 61. Extension plate; 611. Feed trough; 62. Ear plate; 63. Support block; 7. Temperature control jacket; 71. First jacket nozzle. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0029] like Figures 1 to 3 As shown, the reaction apparatus for preparing low-sodium aluminum sol provided by the present invention is essentially a reaction apparatus that can continuously carry out the preparation of aluminum sol colloid and the removal of sodium ion salt. By setting up a reaction vessel 1, a fixed cover 2 and an annular cover 3, metallic aluminum and hydrochloric acid react in the reaction vessel 1 to generate a colloidal solution of aluminum sol. After the aluminum sol colloid is generated, it is in a nanoparticle state. At this time, the aluminum sol colloidal solution is directly transferred into the annular cover 3. The aluminum sol colloidal solution in the nanoparticle state passes through the ion exchange column 33 in the annular cover 3. The sodium ions in the aluminum sol colloidal solution are adsorbed and separated by the strong acid cation exchange resin in the ion exchange column 33, thereby obtaining low-sodium aluminum sol.

[0030] In terms of specific structural installation, the structural body can be constructed according to the inventive concept of this embodiment. In this embodiment, no special limitations are imposed.

[0031] In this embodiment, a reaction apparatus for preparing low-sodium aluminum sol includes: Reactor 1, with an internal cavity for the aluminum sol preparation reaction; A fixed cover 2 is located at the top of the reactor 1 and communicates with the inner cavity of the reactor 1. An annular cover 3 is fixedly installed in the middle of the fixed cover 2. Multiple processing tanks 31 are arranged around the inside of the annular cover 3. Circular through-slots 32 are provided at both ends of each processing tank 31. An ion exchange column 33 is provided inside the processing tank 31. The two ends of the ion exchange column 33 are respectively connected to the two circular through-slots 32. A transition cavity 34 is provided at the top of the annular cover 3. The circular through-slots 32 at the top of the multiple processing tanks 31 are all connected to the transition cavity 34. Multiple extraction pipes 35 are arranged around the inside of the annular cover 3, and the bottom end of the extraction pipes 35 is located inside the reactor 1. A return pipe 36 is fixedly installed on the outside of the annular cover 3. One end of the return pipe 36 is connected to the extraction pipe 35, and the other end of the return pipe 36 is connected to the transition cavity 34. The aluminum sol colloidal solution generated in the reactor 1 can enter the ion exchange column 33 through the extraction pipe 35 and the return pipe 36 to complete the adsorption and desorption of sodium ions. The bottom end of the annular cover 3 is fixedly provided with a storage chamber 37, and the bottom end of the storage chamber 37 is fixedly provided with a discharge valve 371 and a backflushing valve 372. The bottom end of the outer wall of the transition chamber 34 is fixedly provided with a waste discharge valve 341, which is used to discharge the solution backflushed from the ion exchange column 33. A material pump 352 is fixedly installed at the top of the outer wall of the fixed cover 2. A connecting pipe 351 is fixedly installed at the input end of the material pump 352. Multiple extraction pipes 35 are connected to the connecting pipe 351. The output end of the material pump 352 is connected to the return pipe 36. The material pump 352 is used to realize the transfer of aluminum sol colloidal solution. A fixing seat 3301 is inserted into the slot of the treatment tank 31. A circular slot 3302 is provided through the middle of the fixing seat 3301. The ion exchange column 33 is detachably inserted into the circular slot 3302. An observation window 3303 is provided through the outer side of the fixing seat 3301. The fixing seat 3301 is used to install and fix the ion exchange column 33 in the treatment tank 31. Temperature control jacket 7 is located outside the reactor 1. Temperature control jacket 7 is used to control the reaction temperature inside the reactor 1. First jacket nozzles 71 are fixed on both sides of temperature control jacket 7. First jacket nozzles 71 are used to connect heat medium pipelines to achieve control of the internal temperature of reactor 1.

[0032] This embodiment also provides a reaction method for preparing low-sodium aluminum sol using reaction equipment, including the following steps: Step 1: Aluminum sol formation. Raw aluminum and hydrochloric acid are injected into reactor 1. The raw aluminum dissolves in the hydrochloric acid to form aluminum chloride. Water is injected into reactor 1. The aluminum chloride undergoes hydrolysis and polymerization to form aluminum sol colloid. Sodium ion salts are mixed in the aluminum sol colloid formed during this process. Sodium hydroxide is added to the mixed solution to control the pH value between 2 and 3. During this process, the heat medium is delivered to the temperature control jacket 7 through the first jacket nozzle 71, so that the internal temperature of the reactor 1 is maintained between 85-95℃ to ensure the normal progress of the reaction. The aluminum sol colloidal particles generated by the reaction are suspended in the solution. Step 2: Aluminum sol transfer. The initially formed aluminum sol colloid is transported to the transition chamber 34 through the extraction pipe 35 and the return pipe 36. The aluminum sol colloid mixed solution in the transition chamber 34 passes through multiple ion exchange columns 33. The sodium ion salt in the aluminum sol colloid solution is adsorbed by the strong acid cation exchange resin in the ion exchange column 33, so that the aluminum sol colloid solution is transformed into a low sodium aluminum sol colloid solution. After the aluminum sol colloidal particles are generated, the aluminum sol colloidal solution generated in the reactor 1 is extracted by the material pump 352, the connecting pipe 351 and the extraction pipe 35. The aluminum sol colloidal solution is injected into the transition chamber 34 through the material pump 352 and the return pipe 36. Then, it is evenly dispersed in the transition chamber 34 and enters multiple ion exchange columns 33. The strong acid cation exchange resin in the ion exchange column 33 reacts with sodium ions to remove sodium ions. During this process, the aluminum sol colloidal particles move downward through the ion exchange column 33 and enter the storage chamber 37. During the exchange reaction between the strong acid cation exchange resin and sodium ions, the hydrogen ions displaced by the exchange reaction cause a local increase in pH. When the aluminum sol colloidal solution is extracted from the reactor 1, the sodium hydroxide originally added to the reactor 1 is also extracted into the transition chamber 34 along with the aluminum sol colloidal solution. The sodium hydroxide solution can undergo an acid-base neutralization reaction with the hydrogen ions displaced by the exchange reaction to generate water. During this process, the unreacted sodium hydroxide solution in the reactor 1 can be treated, and the unreacted sodium hydroxide solution can be used to control the pH value of the aluminum sol colloidal solution during the exchange reaction to ensure the stability of the aluminum sol colloidal solution. It should be noted that when the aluminum sol colloidal solution and sodium hydroxide solution are not extracted from the reactor 1, in order to ensure that the pH value is maintained between 2 and 3 during the preparation of the aluminum sol colloidal solution, and because the acidification reaction continuously generates dilute hydrochloric acid during the preparation of the aluminum sol colloidal solution, the addition of sodium hydroxide solution is carried out continuously. After the preparation of the aluminum sol colloidal solution is completed, there is a surplus of sodium hydroxide solution because the addition is not stopped in time. At this time, the aluminum sol colloidal solution and sodium hydroxide solution are quickly extracted into the transition chamber 34 for sodium ion removal, which can realize the reuse of excess sodium hydroxide solution. It should be further noted that the transfer of the aluminum sol colloidal solution should be carried out within 10 minutes after the aluminum sol colloid is formed. At this time, the aluminum sol colloid is in a nanoparticle state. The aluminum sol colloid in the nanoparticle state will not cause blockage of the strongly acidic cation exchange resin. The formation of the aluminum sol colloid can be monitored by detecting the pH change in reaction vessel 1. When the pH value in reaction vessel 1 increases, it indicates that the reaction has stopped and the generated hydrogen ions are insufficient to react with the continuously added sodium hydroxide solution. This indicates that the reaction between the raw material aluminum and hydrochloric acid has stopped, and the aluminum sol colloid is formed. Once completed, the aluminum sol colloid can pass through the ion exchange column 33 under normal pressure. If the required standard for sodium ion content in the aluminum sol colloid is relatively high, an air compressor can be used to pressurize the transition chamber 34, allowing the aluminum sol colloid to pass through the ion exchange column 33 under pressure. The aluminum sol colloid under pressure can pass through the ion exchange column faster, thereby improving the preparation efficiency of the aluminum sol colloid. Correspondingly, the sodium ion content in the aluminum sol colloid will increase. The choice between normal pressure and pressurization can be made according to the standard for sodium ion content in the aluminum sol colloid. Step 3: Product discharge. The low-sodium aluminum sol colloidal solution is discharged and guided to the aging tank for aging treatment. The low-sodium aluminum sol colloidal solution can be discharged through the discharge valve 371 and guided to the aging tank for aging treatment to complete the preparation of low-sodium aluminum sol; Step 4: Backflushing. Use dilute hydrochloric acid to backflush the ion exchange column 33 to regenerate the strongly acidic cation exchange resin, thus completing one preparation cycle of low-sodium aluminum sol. After the low-sodium aluminum sol colloidal solution is completely discharged, the discharge valve 371 is closed. Then, dilute hydrochloric acid is injected into the storage chamber 37 through the backflushing valve 372. The dilute hydrochloric acid then passes through the ion exchange column 33 under pressure. The dilute hydrochloric acid reacts with the strongly acidic cation exchange resin that has undergone an exchange reaction in the ion exchange column 33 to regenerate the exchange resin. After passing through the ion exchange column 33, the dilute hydrochloric acid enters the transition chamber 34 and is then discharged through the waste discharge valve 341. During this process, the regeneration effect of the exchange resin is judged by measuring the pH value of the discharged solution at the waste discharge valve 341. When the pH value of the discharged solution is 2.5, the injection of dilute hydrochloric acid is stopped, and the excess dilute hydrochloric acid is discharged from the discharge valve 371. Example 2

[0033] This embodiment is a supplement to Embodiment 1. It takes into account that the reaction temperature is high during the preparation of aluminum sol colloid, while the temperature required for the aluminum sol colloid solution to remove sodium ions is low when passing through ion exchange column 33. like Figures 4 to 5As shown, the reaction apparatus for preparing low-sodium aluminum sol provided by the present invention is essentially a reaction apparatus that can control the temperature of the aluminum sol colloidal solution during the transfer process. By setting a cooling jacket 4, the aluminum sol colloidal solution passes through the cooling jacket 4 during the transfer process. The refrigerant injected into the cooling jacket 4 can achieve rapid cooling of the aluminum sol colloidal solution, thereby achieving the effect of inhibiting the aging of the aluminum sol colloid. At the same time, the cooling jacket 4 can also control the temperature of the environment where the ion exchange column 33 is located, so as to ensure the working environment when the strongly acidic cation exchange resin adsorbs sodium ions, thereby ensuring the removal effect of sodium ions in the aluminum sol colloidal solution.

[0034] In terms of specific structural installation, the structural body can be constructed according to the inventive concept of this embodiment. In this embodiment, no special limitations are imposed.

[0035] In this embodiment, a reaction apparatus for preparing low-sodium aluminum sol includes: Cooling jacket 4 is fixedly installed inside the annular cover 3 and is connected to the interior of the annular cover 3. Multiple material extraction pipes 35 are installed through the interior of the cooling jacket 4. Second jacket nozzles 41 are fixedly installed on both sides of the top of the cooling jacket 4. The second jacket nozzles 41 are used to connect to the refrigerant inlet. Multiple heat-conducting fins 3501 are fixedly provided in the middle of the feed tube 35. The multiple heat-conducting fins 3501 have a spiral structure and are all located inside the cooling jacket 4. The spiral structure of the heat-conducting fins 3501 can guide the flow of refrigerant to improve the heat exchange efficiency between the refrigerant and the feed tube 35.

[0036] When using the reaction apparatus for preparing low-sodium aluminum sol in this embodiment, the refrigerant is injected into the cooling jacket 4 through the second jacket nozzle 41, and the interior of the cooling jacket 4 is filled with refrigerant. At this time, the refrigerant is in contact with the interior of the heat-conducting fins 3501 and the annular cover 3. When the aluminum sol colloidal solution is drawn through the extraction pipe 35, the extraction pipe 35 exchanges heat with the refrigerant through the heat-conducting fins 3501, thereby achieving the cooling treatment of the aluminum sol colloidal solution. At the same time, the refrigerant exchanges heat with the annular cover 3, so that the temperature of the environment where the ion exchange column 33 is located is controlled. The aluminum sol colloidal solution after the temperature is reduced enters the ion exchange column 33 through the transition chamber 34 and removes sodium ions. Example 3

[0037] This embodiment is a supplement to Embodiment 1 and Embodiment 2. Considering that the aluminum sol colloid is suspended in the mixed solution after it is generated, the extraction tube 35 may easily extract the remaining solution at the same time when extracting the aluminum sol colloid, which will waste the raw materials and affect the removal of sodium ions by the ion exchange column 33. In addition, some undissolved impurities remain in the mixed solution during the reaction, which will affect the subsequent reaction. like Figures 6 to 8 As shown, the reaction apparatus for preparing low-sodium aluminum sol according to the present invention is essentially a reaction apparatus that can guide the separation of aluminum sol colloid from the mixed solution to reduce the waste of raw material solution. When the aluminum sol colloid is transferred after its formation, some undissolved impurities are drawn into the transition chamber 34 under the action of centrifugal force. The undissolved impurities remain in the transition chamber 34 because they cannot pass through the ion exchange column 33. After the aluminum sol colloid removes sodium ions, dilute hydrochloric acid can be injected through the storage chamber 37 to achieve backflushing regeneration of the ion exchange column 33. During this process, the undissolved impurities remaining in the transition chamber 34 can be discharged together with the backflushing solution, thereby achieving synchronous cleaning of residual impurities during the reaction process, so as to facilitate continuous operation and production of the apparatus.

[0038] In terms of specific structural installation, the structural body can be constructed according to the inventive concept of this embodiment. In this embodiment, no special limitations are imposed.

[0039] In this embodiment, a reaction apparatus for preparing low-sodium aluminum sol includes: A stirring rod 5 is rotatably mounted at the top center of the fixed cover 2. A forward and reverse motor 51 is mounted at the top of the stirring rod 5. The forward and reverse motor 51 is used to drive the stirring rod 5 to rotate forward in the early stage of the reaction to complete the solution stirring. The forward and reverse motor 51 is used to drive the stirring rod 5 to rotate in reverse in the later stage of the reaction to complete the colloid aggregation. A stirring blade 52 is fixedly mounted at the bottom of the stirring rod 5. The stirring blade 52 has two sets, upper and lower, and both sets of stirring blades 52 are inclined. The guide plate 6 is provided in multiple sets and is arranged around the inside of the reactor 1. The guide plate 6 is used in conjunction with the stirring rod 5 to collect the aggregated aluminum sol colloidal particles. An extension plate 61 is fixedly provided on the side of the guide plate 6 away from the inner wall of the reactor 1. An angle is provided between the extension plate 61 and the guide plate 6. An ear plate 62 is fixedly provided on the side of the extension plate 61 away from the guide plate 6. An angle is provided between the ear plate 62 and the extension plate 61. Multiple feed grooves 611 are sequentially provided through the middle of the extension plate 61 from bottom to top. Since the ear plate 62 and the extension plate 61 are both inclined relative to the guide plate 6, when the guide plate 6 and the extension plate 61 are in contact with the inner wall of the reactor 1, there is an angle between the ear plate 62 and the inner wall of the reactor 1. In this state, the reversed solution can push the guide plate 6 to rotate through the ear plate 62. A support rod 601 is fixedly provided on the side of the guide plate 6 near the reactor 1. Both ends of the support rod 601 are fitted with positioning rings 602, and the positioning rings 602 are fixedly provided on the inner wall of the reactor 1. Multiple support blocks 63 are fixedly provided on the side of the guide plate 6 near the reactor 1. The support blocks 63 are designed with an arc-shaped structure and are located on the side of the guide plate 6 away from the extension plate 61.

[0040] When using the reaction apparatus for preparing low-sodium aluminum sol in this embodiment, during the aluminum sol colloid formation reaction, the forward and reverse motor 51 drives the stirring rod 5 to rotate forward, and the stirring rod 5 drives the stirring blade 52 to rotate counterclockwise. At this time, the mixed solution rotates counterclockwise under the push of the stirring blade 52. The counterclockwise rotation of the mixed solution pushes the guide plate 6 and the extension plate 61, so that the guide plate 6 flips relative to the reaction vessel 1 until the guide plate 6, the extension plate 61 and the ear plate 62 are attached to the inner wall of the reaction vessel 1. During this process, the mixed solution between the guide plate 6 and the inner wall of the reaction vessel 1 is discharged through the feed trough 611 to ensure the reaction effect of the mixed solution. After the aluminum sol colloid formation reaction stops, the forward and reverse motor 51 drives the stirring rod 5 to reverse, and the stirring rod 5 drives the stirring blade 52 to rotate clockwise. At this time, the mixed solution and aluminum sol colloid rotate clockwise under the guidance of the stirring blade 52. At this time, the ear plate 62 is pushed by the mixed solution and flips over. The ear plate 62 drives the extension plate 61 and the guide plate 6 to flip over until the support block 63 on the outside of the guide plate 6 is in close contact with the inner wall of the reactor 1. At this time, a storage space is formed between the guide plate 6 and the inner wall of the reactor 1. During this process, the aluminum sol colloid and undissolved impurities gradually approach the inner wall of the reactor 1 under the action of centrifugal force and stay between the guide plate 6 and the reactor 1. At this time, the extraction pipe 35 can extract the aluminum sol colloid and undissolved impurities between the guide plate 6 and the reactor 1, thereby achieving the effect of avoiding the extraction of the raw material solution.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A reaction apparatus for preparing low-sodium aluminum sol, characterized in that, include: The reactor (1) has an internal cavity for the aluminum sol preparation reaction; A fixed cover (2) is provided at the top of the reactor (1) and communicates with the inner cavity of the reactor (1). An annular cover (3) is fixedly provided in the middle of the fixed cover (2). Multiple processing tanks (31) are arranged around the inside of the annular cover (3). Circular through slots (32) are provided at both ends of each processing tank (31). Ion exchange columns (33) are provided inside each processing tank (31). The two ends of each ion exchange column (33) are respectively connected to two circular through slots (32). A transition cavity (34) is provided at the top of the annular cover (3). The tops of the multiple processing tanks (31) are... All circular channels (32) are connected to the transition chamber (34). The annular cover (3) is surrounded by multiple material extraction pipes (35), and the bottom end of the material extraction pipes (35) is located inside the reactor (1). The annular cover (3) is fixedly provided with a return pipe (36). One end of the return pipe (36) is connected to the material extraction pipe (35), and the other end of the return pipe (36) is connected to the transition chamber (34). The aluminum sol colloidal solution generated in the reactor (1) can enter the ion exchange column (33) through the material extraction pipe (35) and the return pipe (36) to complete the adsorption and detachment of sodium ions.

2. The reaction apparatus for preparing low-sodium aluminum sol according to claim 1, characterized in that, Also includes: A material pump (352) is fixedly installed on the top of the outer wall of the fixed cover (2). A connecting pipe (351) is fixedly installed at the input end of the material pump (352). Multiple material extraction pipes (35) are connected to the connecting pipe (351). The output end of the material pump (352) is connected to the return pipe (36).

3. The reaction apparatus for preparing low-sodium aluminum sol according to claim 1, characterized in that, Also includes: A stirring rod (5) is rotatably located at the top center of a fixed cover (2), and a forward and reverse motor (51) is provided at the top of the stirring rod (5). The forward and reverse motor (51) is used to drive the stirring rod (5) to rotate forward in the early stage of the reaction to complete the solution stirring. The forward and reverse motor (51) is used to drive the stirring rod (5) to rotate in reverse in the later stage of the reaction to complete the colloid aggregation. A stirring blade (52) is fixedly provided at the bottom of the stirring rod (5). The stirring blade (52) is provided in two sets, and both sets of stirring blades (52) are inclined. The guide plate (6) is provided in multiple sets and is arranged around the inside of the reactor (1). The guide plate (6) is used in conjunction with the stirring rod (5) to collect the aggregated aluminum sol colloidal particles.

4. The reaction apparatus for preparing low-sodium aluminum sol according to claim 3, characterized in that, Also includes: An extension plate (61) is fixedly provided on the side of the guide plate (6) away from the inner wall of the reactor (1). An inclination angle is provided between the extension plate (61) and the guide plate (6). An ear plate (62) is fixedly provided on the side of the extension plate (61) away from the guide plate (6). An inclination angle is provided between the ear plate (62) and the extension plate (61). Multiple material passage grooves (611) are sequentially provided through the middle of the extension plate (61) from bottom to top.

5. The reaction apparatus for preparing low-sodium aluminum sol according to claim 4, characterized in that, Also includes: The guide plate (6) is fixedly provided with a support rod (601) on the side near the reactor (1). Both ends of the support rod (601) are fitted with positioning rings (602), and the positioning rings (602) are fixedly provided on the inner wall of the reactor (1). The guide plate (6) is fixedly provided with multiple support blocks (63) on the side near the reactor (1). The support blocks (63) are designed with an arc shape, and the support blocks (63) are located on the side of the guide plate (6) away from the extension plate (61).

6. The reaction apparatus for preparing low-sodium aluminum sol according to claim 1, characterized in that, Also includes: Cooling jacket (4) is fixedly disposed on the inner side of the annular cover (3) and the cooling jacket (4) is connected to the interior of the annular cover (3). Multiple material extraction tubes (35) are disposed through the interior of the cooling jacket (4). The top two sides of the cooling jacket (4) are fixedly provided with second jacket nozzles (41).

7. The reaction apparatus for preparing low-sodium aluminum sol according to claim 1, characterized in that, Also includes: The middle part of the feed tube (35) is fixedly provided with multiple heat-conducting fins (3501), the multiple heat-conducting fins (3501) are spiral structures, and the multiple heat-conducting fins (3501) are all located inside the cooling jacket (4).

8. The reaction apparatus for preparing low-sodium aluminum sol according to claim 1, characterized in that, Also includes: Temperature control jacket (7) is located on the outside of the reactor (1). The temperature control jacket (7) is used to control the reaction temperature inside the reactor (1). The temperature control jacket (7) has a first jacket nozzle (71) fixed on both sides.

9. The reaction apparatus for preparing low-sodium aluminum sol according to claim 1, characterized in that, Also includes: A fixing seat (3301) is inserted into the groove of the treatment tank (31). A circular slot (3302) is provided through the middle of the fixing seat (3301). The ion exchange column (33) is detachably inserted into the circular slot (3302). An observation window (3303) is provided through the outside of the fixing seat (3301). The fixing seat (3301) is used to install and fix the ion exchange column (33) in the treatment tank (31). The bottom end of the annular cover (3) is fixedly provided with a storage chamber (37), the bottom end of the storage chamber (37) is fixedly provided with a discharge valve (371) and a backflushing valve (372), and the bottom end of the outer wall of the transition chamber (34) is fixedly provided with a waste discharge valve (341).

10. A reaction method for a reaction apparatus for preparing low-sodium aluminum sol according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Aluminum sol generation. Raw aluminum and hydrochloric acid are injected into the reaction vessel (1). The raw aluminum dissolves in the hydrochloric acid to form aluminum chloride. Water is injected into the reaction vessel (1). The aluminum chloride undergoes hydrolysis and polymerization to generate aluminum sol colloid. Sodium ion salts are mixed in the aluminum sol colloid generated during this process. Sodium hydroxide is added to the mixed solution to control the pH value between 2 and 3. Step 2: Aluminum sol transfer. The initially formed aluminum sol colloid is transported to the transition chamber (34) through the extraction pipe (35) and the return pipe (36). The aluminum sol colloid mixed solution in the transition chamber (34) passes through multiple ion exchange columns (33). The sodium ion salt in the aluminum sol colloid solution is adsorbed by the strong acid cation exchange resin in the ion exchange column (33), so that the aluminum sol colloid solution is converted into a low sodium aluminum sol colloid solution. Step 3: Product discharge. The low-sodium aluminum sol colloidal solution is discharged and guided to the aging tank for aging treatment. Step 4: Backflushing. Use dilute hydrochloric acid to backflush the ion exchange column (33) to regenerate the strongly acidic cation exchange resin, thus completing a low-sodium aluminum sol preparation cycle.

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