A processing and synthesizing device for lithium hexafluorophosphate

Abstract

The application relates to the technical field of chemical substance synthesis, in particular to a processing and synthesizing device for lithium hexafluorophosphate, which comprises a synthesizing container, the outer surface of the synthesizing container is symmetrically provided with lifting driving elements, the upper end of each lifting driving element is provided with a power connecting element, and two power connecting elements commonly support a pressurizing element; the pressurizing element is coaxially arranged with the synthesizing container, the diameter of the pressurizing element is matched with the inner diameter of the synthesizing container, and the pressurizing element is provided with a gas feeding element; the lifting driving element is used for driving the pressurizing element to enter the inside of the synthesizing container, compressing the space inside the synthesizing container and increasing the pressure. When used, the lifting driving element and the pressurizing element are connected through the power connecting element; when the lithium hexafluorophosphate synthesis reaction is carried out, the lifting driving element drives the pressurizing element to move downwards to compress the space inside the synthesizing container, increase the pressure inside the synthesizing container and improve the reaction speed between the LiF.HF solution and the PF5 gas.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical substance synthesis, in particular to a processing and synthesis device for lithium hexafluorophosphate. Background Art

[0002] Lithium hexafluorophosphate is an inorganic compound with the chemical formula LiPF6. It is a white crystalline powder that is easily soluble in water and organic solvents such as low-concentration methanol, ethanol, acetone, and carbonates. It is mainly used as an electrolyte material for lithium-ion batteries.

[0003] Lithium hexafluorophosphate (LFP) processing techniques include the hydrofluoric acid solvent method, the organic solvent method, and the gas-solid reaction method. The hydrofluoric acid solvent method is mature and suitable for large-scale production, and is currently the mainstream process for producing LFP.

[0004] The hydrofluoric acid solvent method is to dissolve lithium halide in anhydrous hydrogen fluoride, then introduce high-purity PF5 gas to react to generate lithium hexafluorophosphate crystals, which are then separated and dried to obtain the lithium hexafluorophosphate product.

[0005] Patent publication number: CN111871357B, entitled "An efficient synthesis device for synthesizing lithium hexafluorophosphate," states that ensuring a sufficient reaction between the LiF·HF solution formed by dissolving lithium salt in anhydrous hydrogen fluoride and PF5 gas is key to the efficiency of lithium hexafluorophosphate synthesis. Existing methods for introducing PF5 gas mostly involve introducing PF5 gas into the solution through an aeration tube, or installing the aeration tube inside a stirring device to allow aeration during stirring to increase the contact between the gas and the solution, thereby performing an aeration operation. However, this method still does not provide a large enough contact area between the PF5 gas and the solution, and the aeration device is prone to repeated contact with localized solutions, while reducing the contact with solutions in other areas. This results in an insufficient reaction and reduces the efficiency of lithium hexafluorophosphate synthesis.

[0006] The above-mentioned prior art utilizes a gas supply flange and a gas delivery device provided on the side wall of the reaction chamber to perform gas delivery operations, allowing PF5 gas to be uniformly introduced from all angles of the reaction chamber side wall. This increases the contact points and contact area between the solution and the gas at the introduction end. In conjunction with the provision of a stirring device, the lithium salt is fully dissolved in the anhydrous hydrofluoric acid. Driven by the stirring device, the LiF·HF solution rotates and produces a water pumping effect, thereby increasing the water pumping height. The LiF·HF solution is lifted upward along the side wall of the reaction chamber and fully contacts the PF5 gas output by the one-way gas delivery valve on the gas supply flange of the reaction chamber side wall. Compared with the conventional method of introducing PF5 gas into the solution through an aeration pipe, or installing the aeration pipe inside the stirring device to ventilate during stirring to increase the contact opportunity between the gas and the solution, this method significantly increases the contact area between the gas and the solution and makes the contact between the gas and the solution more uniform in position. This solves the problem that the gas in the existing ventilation method is prone to repeated contact with localized solution, while reducing the contact opportunity with other parts of the solution, resulting in insufficient reaction and reduced lithium hexafluorophosphate synthesis efficiency.

[0007] However, the inventors discovered the following problem during use: the gas supply convex plate and gas delivery device on the side wall of the reaction chamber are also based on the principle of aeration and stirring, which can only increase the contact area between PF5 gas and LiF·HF solution, but does not change the reaction rate of PF5 gas and LiF·HF solution, and the reaction speed improvement is limited.

[0008] To this end, the present application proposes a processing and synthesis device for lithium hexafluorophosphate, which is used to further increase the reaction rate of PF5 gas and LiF·HF solution. Summary of the Invention

[0009] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a processing and synthesis device for lithium hexafluorophosphate, which is used to solve the problem in the prior art that the reaction efficiency of the aeration and stirring method is not significantly improved.

[0010] To achieve the above-mentioned and other related objects, the present invention provides a processing and synthesis device for lithium hexafluorophosphate, comprising a synthesis container, wherein the outer surface of the synthesis container is symmetrically provided with lifting drive members, the upper end of each lifting drive member is provided with a power connection member, and the two power connections jointly support a pressurizing member;

[0011] The pressure member is coaxially arranged with the synthesis container, the diameter of the pressure member is adapted to the inner diameter of the synthesis container, and the pressure member is provided with an air supply member;

[0012] The lifting drive member is used to drive the pressurizing member to enter the interior of the synthesis container to compress the space inside the synthesis container and increase the pressure;

[0013] The inner bottom of the synthesis container is provided with a crystallization attachment piece, and the crystallization attachment piece can be taken out from the interior of the synthesis container.

[0014] Preferably, the pressure member includes a piston disc, the edge of the top of the piston disc is symmetrically provided with connecting grooves, the depth of the connecting grooves does not exceed half the thickness of the piston disc, and the bottom of the connecting groove is provided with a locking hole that does not penetrate the piston disc;

[0015] The outer surface of the piston disc is a smooth surface, and the outer surface of the piston disc is in contact with the inner wall of the synthesis container.

[0016] Preferably, the power connecting member is Z-shaped, the upper portion of the power connecting member is connected to the top of the lifting drive member through a locking device, and the lower portion of the power connecting member is connected to the inside of the connecting groove through a locking device.

[0017] Preferably, the air delivery member includes an air delivery pipe, the air delivery pipe is in fluid communication with the bottom of the pressurizing member, and a one-way valve ball is provided inside the air delivery pipe.

[0018] Preferably, the crystal attachment member includes a support and a crystal attachment body, the support body is placed on the inner bottom of the synthesis container, and the outer surface of the support body is in contact with the inner wall of the synthesis container, and the crystal attachment body is arranged above the support body.

[0019] Preferably, the support body comprises a support plate, the bottom of the support plate is provided with a mounting groove, and the top of the support plate is provided with a plurality of limiting holes penetrating into the interior of the mounting groove;

[0020] The crystal attachment body includes a sheet connection plate, which is placed inside the mounting groove, and the thickness of the sheet connection plate does not exceed the depth of the mounting groove. A crystal attachment plate that matches the number and position of the limiting holes is provided on the top of the sheet connection plate, and the crystal attachment plate passes through the limiting holes to the top of the support plate.

[0021] Preferably, the bottom of the sheet connecting plate is provided with a plurality of equally spaced magnetic strips;

[0022] A driving motor is provided at the bottom of the synthesis container, and a magnetic coupling member is provided at the output end of the driving motor. The magnetic coupling member is magnetically coupled to the magnetic strip.

[0023] Preferably, the magnetic coupling member includes a transmission disk, a plurality of driving magnets are provided on the top of the transmission disk, and the driving magnets are magnetically connected to the magnetic strip.

[0024] Preferably, a cavity is provided inside the transmission disc, and two power extraction slots of different diameters but arranged concentrically are provided at the bottom of the transmission disc, and the power extraction slots are connected to the cavity inside the transmission disc;

[0025] The driving magnet includes an electromagnetic generator and a driving magnetic strip. The electromagnetic generator is arranged inside the cavity of the transmission disk. The positive and negative poles of the transmission disk are respectively connected to electrode plates. The two electrode plates are annular and are respectively located inside the two power extraction slots.

[0026] The driving magnetic strip is arranged on the top of the transmission disc, and the driving magnetic strip is magnetically connected to the electromagnetic generator;

[0027] The electrode plate is electrically connected to an external power supply.

[0028] Preferably, the power supply component includes an electrode positive-negative converter, and the positive and negative poles of the electrode positive-negative converter respectively extend two power supply tentacles, and the ends of the two power supply tentacles respectively extend into the interior of the power supply slot to contact and electrically connect with the two electrode plates.

[0029] As described above, the processing and synthesis device for lithium hexafluorophosphate of the present invention has the following beneficial effects:

[0030] The present invention provides a lifting drive member on the outer surface of a synthesis container, and connects the lifting drive member and a pressurizing member via a power connecting member. When a lithium hexafluorophosphate synthesis reaction is carried out, the lifting drive member drives the pressurizing member to move downward to compress the space inside the synthesis container, thereby increasing the pressure inside the synthesis container, improving the solubility of the LiF·HF solution, and accelerating the reaction speed between the LiF·HF solution and PF5 gas.

[0031] At the same time, increasing the pressure inside the synthesis container by compressing the space with a pressure member consumes less energy than using a pressure pump to inject pressure into the synthesis container. Moreover, after the PF5 gas is partially consumed, further compressing the space inside the synthesis container allows the remaining PF5 gas to continue to react with the LiF·HF solution, thereby improving the completeness of the synthesis.

[0032] The present invention provides a gas pipe on the pressurizing member and a one-way valve ball inside the gas pipe. When lithium hexafluorophosphate synthesis is carried out, PF5 gas can be injected into the interior of the synthesis container at any time through the gas pipe. The gas pipe is kept away from the solution in the synthesis container, and the gas injection pipeline can be prevented from being blocked by crystals and corroded by anhydrous hydrogen fluoride.

[0033] At the same time, when the gas consumption inside the synthesis container is low, the pressure inside the synthesis container is greater than the pressure of the external PF5 gas injection, and the one-way valve ball will be in a locked state to prevent the gas from continuing to enter the interior of the synthesis container, causing the internal pressure of the synthesis container to overload, thereby protecting the equipment.

[0034] The present invention arranges a support body and a crystal attachment body made of Hastelloy at the inner bottom of a synthesis container. When PF5 gas reacts with a LiF·HF solution to generate lithium hexafluorophosphate crystals, the crystals adhere to the outer surface of the protruding crystal attachment body and the top of the support body. After the crystal attachment body is removed, the crystals can be separated. In addition, the edge of the support body can scrape off the crystals attached to the inner wall of the synthesis container, thereby improving the cleanliness of the interior of the synthesis container.

[0035] At the same time, when the crystal attachment sheet is pulled out of the limiting hole through the sheet connecting plate, the crystal attached to the outer surface of the crystal attachment sheet will be scraped off due to the fit between the limiting hole and the crystal attachment sheet, thereby improving the convenience of crystal recovery.

[0036] The present invention provides a magnetic strip at the bottom of the sheet connecting disk and a driving motor at the bottom of the synthesis container to drive the magnetic coupling to rotate, thereby driving the sheet connecting disk to rotate through magnetic coupling, thereby stirring the solution in the synthesis container through the crystal attachment sheet, further improving the synthesis efficiency. Moreover, the driving motor and the magnetic coupling are both located outside the synthesis container, which can effectively avoid corrosion.

[0037] At the same time, the drive motor and magnetic coupling parts can be made of ordinary materials, without the need to use corrosion-resistant Hastelloy, thus saving equipment preparation costs.

[0038] 5. The present invention provides an electrode positive-negative converter and a power supply antenna to power the electromagnetic generator, so that the electromagnetic generator generates a magnetic magnetization drive magnetic strip. When the electrode positive-negative converter changes the direction of the current, the direction of the magnetic pole generated by the electromagnetic generator will change. Through the principle of like charges repel and opposite charges attract, the sheet connecting disk is suspended in the middle of the synthesis container or sinks to the bottom of the synthesis container. The up and down floating of the sheet connecting disk can improve the stirring effect of the solution and improve the synthesis efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Shown is a schematic structural diagram of the present invention.

[0040] Figure 2 Shown as the present invention Figure 1 A magnified schematic diagram of the structure at point A.

[0041] Figure 3 Shown is a schematic diagram of the installation of the crystal attachment of the present invention.

[0042] Figure 4 Shown is a structural cross-sectional view of the pressurizing member and the air supply member of the present invention.

[0043] Figure 5 Shown is a schematic structural diagram of the crystal attachment of the present invention.

[0044] Figure 6 Shown is a structural assembly diagram of the crystal attachment of the present invention.

[0045] Figure 7 Shown is a bottom view of the structure of the present invention.

[0046] Figure 8 Shown is a schematic structural diagram of the magnetic coupling component of the present invention.

[0047] Figure 9 Shown is a bottom view of the structure of the magnetic coupling component of the present invention.

[0048] Figure 10 Shown is a cross-sectional view of the structure of the magnetic coupling of the present invention.

[0049] Component number description:

[0050] 1. Synthesis container; 2. Lifting drive component; 3. Power connection component; 4. Pressurizing component; 401. Piston disc; 402. Connecting groove; 403. Locking hole; 5. Air supply component; 501. Air pipe; 502. One-way valve ball; 6. Crystal attachment component; 601. Support body; 6011. Support disc; 6012. Mounting groove; 6013. Limiting hole; 602. Crystal attachment body; 6021. Crystal attachment sheet; 6022. Sheet connecting disc; 6023. Magnetic strip; 7. Driving motor; 8. Magnetic coupling component; 801. Transmission disc; 802. Driving magnet; 8021. Electromagnetic generator; 8022. Electrode plate; 8023. Driving magnetic strip; 803. Power supply slot; 9. Power supply component; 901. Electrode positive and negative converter; 902. Power supply antenna. DETAILED DESCRIPTION

[0051] The following describes the implementation of the present invention through specific embodiments. People skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0052] See also Figures 1 to 10 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0053] like Figure 1 and Figure 3 As shown, the present invention provides a processing and synthesis device for lithium hexafluorophosphate, comprising a synthesis vessel 1. The interior of the synthesis vessel 1 is used to store a LiF·HF solution and provide a reaction zone for the solution. The main body of the synthesis vessel 1 is made of corrosion-resistant Hastelloy. Elevating actuators 2 are symmetrically arranged on the outer surface of the synthesis vessel 1. These actuators 2 are electrically or hydraulically operated and controllable by connecting to an external power source. Each elevating actuator 2 is provided with a power connector 3 at its upper end. The two power connectors 3 jointly support a pressurizing element 4. Both ends of the power connectors 3 are secured with bolts to facilitate removal of the pressurizing element 4 for maintenance. The pressurizing element 4 is coaxially arranged with the synthesis vessel 1, and its diameter matches the inner diameter of the synthesis vessel 1. The elevating actuator 2 is used to drive the pressurizing element 4 into the synthesis vessel 1, compressing the interior of the synthesis vessel 1 and increasing the pressure and temperature. When both pressure and temperature are increased, the molecular motion of the LiF·HF solution and PF5 gas is intensified, increasing the frequency and intensity of intermolecular collisions, thereby increasing the rate of the synthesis reaction in a non-stirring state. A gas delivery member 5 is mounted on the pressure member 4. After the pressure member 4 seals the opening of the synthesis vessel 1, PF5 gas can be injected into the synthesis vessel 1 through the gas delivery member 5. PF5 gas can be replenished as the reaction progresses. Furthermore, because the gas delivery member 5 is positioned above the synthesis vessel 1 and away from the LiF·HF solution, it is unlikely to become clogged by crystallization during the reaction and will not be corroded by the anhydrous hydrofluoric acid in the LiF·HF solution.

[0054] Increasing the pressure by compressing the internal space of the synthesis container 1 by the pressure member 4 has the following advantages compared to applying pressure directly by a pressure pump:

[0055] The energy consumed by the hydraulically or electrically driven lifting drive member 2 to compress the interior space of the synthesis container 1 is less than the energy consumed by the pressure pump pressurization. The pressure pump pressurization requires the pressure pump to always work to maintain the pressure.

[0056] Maintaining pressure with a pressure pump requires constant injection of PF5 gas into synthesis vessel 1. Once the LiF·HF solution in synthesis vessel 1 has fully reacted, excess PF5 gas is present. Recovering the lithium hexafluorophosphate crystals requires either recovering the PF5 gas or discharging it to relieve the pressure, which increases the gas recovery process, wastes resources, and pollutes the environment. However, using a pressure element 4 to compress the space allows the amount of PF5 gas injected to be adjusted based on the required reaction volume of the LiF·HF solution. After the synthesis reaction is complete, the remaining PF5 gas is minimal, eliminating the need for recovery and minimizing waste and pollution.

[0057] The inner bottom of the synthesis vessel 1 is equipped with a crystallization attachment 6, which increases the contact area with the LiF·HF solution. When the LiF·HF solution reacts with PF5 gas to produce lithium hexafluorophosphate crystals, the crystals preferentially condense on the protruding crystallization attachment 6. After the synthesis reaction is complete, the crystallization attachment 6 is removed from the synthesis vessel 1 to facilitate recovery of the crystals. This prevents crystals from settling at the bottom of the synthesis vessel 1, making it difficult to clean and preventing them from clogging the discharge port on the side of the synthesis vessel 1.

[0058] like Figure 2 and Figure 4 As shown, in some embodiments, the pressure member 4 of the present invention includes a piston disc 401, which is a piston body made of Hastelloy alloy. The outer surface of the piston disc 401 is smooth and conforms to the inner wall of the synthesis container 1. This allows the piston disc 401 to seal the interior of the synthesis container 1 while also allowing it to slide up and down. Connecting grooves 402 are symmetrically arranged along the top edge of the piston disc 401 to define the installation position of the power connector 3, thereby ensuring the stability of the pressure member 4 after installation. The depth of the connecting grooves 402 does not exceed half the thickness of the piston disc 401, which is used to limit the installation position of the power connector 3 while preventing excessive reduction in the strength of the piston disc 401. The bottom of the connecting groove 402 is provided with a locking hole 403 that does not penetrate the piston disc 401 and is used to cooperate with a bolt to secure the power connector 3. Furthermore, the locking hole 403 does not penetrate the piston disc 401, which improves the sealing performance of the piston disc 401 and prevents corrosion at the bolt connection point from gas or liquid in the synthesis container 1.

[0059] like Figure 1 and Figure 2 As shown, in some embodiments, the power connector 3 of the present invention is Z-shaped, allowing the power connector 3 to span the inner and outer walls of the synthesis container 1, allowing the lifting drive 2 to drive the pressure member 4 from the side to enter the interior of the synthesis container 1. This reduces the height of the equipment, lowers the center of gravity of the equipment, and improves the stability of the equipment. The upper portion of the power connector 3 is connected to the top of the lifting drive 2 by a locking device such as a bolt, and the lower portion of the power connector 3 is connected to the interior of the connecting groove 402 by a locking device. The lifting drive 2, power connector 3, and pressure member 4 can be disassembled from each other, facilitating subsequent maintenance and servicing of the equipment. The refinement of the components also reduces the cost of replacing the equipment later.

[0060] like Figure 4As shown, in some embodiments, the gas delivery member 5 of the present invention includes a gas pipe 501, the outer surface of which is provided with a quick-connect groove for connecting to an external pipeline. The gas pipe 501 is in fluid communication with the bottom of the pressurizing member 4. At this time, the PF5 gas input from the outside will be filled into the interior of the synthesis container 1 through the gas pipe 501 to undergo a chemical synthesis reaction with the LiF·HF solution. The channel inside the gas pipe 501 is a tapered channel with a smaller diameter at the top and larger at the bottom. A one-way valve ball 502 is provided inside the gas pipe 501. The one-way valve ball 502 includes a ball for blocking the internal channel of the gas pipe 501 and an elastic device supporting the ball. When gas is injected through the gas pipe 501, the ball moves downward under the action of the gas pressure, thereby allowing the channel inside the gas pipe 501 to be connected. When the gas input stops or the pressure inside the synthesis container 1 is too high, the air pressure inside the synthesis container 1 and the elastic device work together to move the ball upward to block the channel inside the gas pipe 501, so as to maintain the pressure inside the synthesis container 1 and prevent gas leakage.

[0061] like Figure 5 As shown, in some embodiments, the crystal attachment member 6 of the present invention includes a support 601 and a crystal attachment member 602. The support 601 is placed on the inner bottom of the synthesis vessel 1 to isolate the crystals generated during the synthesis reaction and prevent them from settling on the bottom. After the synthesis reaction is completed, the generated crystals can be removed from the interior of the synthesis vessel 1 by removing the support 601, facilitating the recovery of the lithium hexafluorophosphate crystals. Furthermore, the outer surface of the support 601 is aligned with the inner wall of the synthesis vessel 1. Upon removal of the support 601, the support 601 scrapes off any lithium hexafluorophosphate crystals adhering to the inner wall of the synthesis vessel 1, further facilitating crystal recovery and ensuring the cleanliness of the interior of the synthesis vessel 1. The crystal attachment member 602 is positioned above the support 601, protruding above the support 601 to increase the contact area with the LiF·HF solution. This provides attachment points for the lithium hexafluorophosphate crystals generated during the synthesis reaction, thereby improving the consistency of the lithium hexafluorophosphate crystal formation.

[0062] like Figure 6 As shown, in some embodiments, the support body 601 of the present invention includes a support plate 6011 , a mounting groove 6012 is provided at the bottom of the support plate 6011 , and a plurality of limiting holes 6013 are provided on the top of the support plate 6011 extending into the interior of the mounting groove 6012 .

[0063] The crystal attachment body 602 includes a sheet connection plate 6022, which is positioned within the mounting groove 6012. The thickness of the sheet connection plate 6022 does not exceed the depth of the mounting groove 6012. This allows the bottom of the support plate 6011 to completely align with the inner bottom of the synthesis container 1 after the sheet connection plate 6022 is positioned within the mounting groove 6012. A crystal attachment sheet 6021 is positioned on top of the sheet connection plate 6022, matching the number and position of the limiting holes 6013. The crystal attachment sheet 6021 extends through the limiting holes 6013 to the top of the support plate 6011, serving as an attachment for the lithium hexafluorophosphate crystals. After the lithium hexafluorophosphate crystals are processed and synthesized, the entire crystal attachment body 6 can be removed from the synthesis container 1 by extracting the crystal attachment sheet 6021 for lithium hexafluorophosphate crystal recovery. After the crystal attachment 6 is removed, the limiting hole 6013 will scrape off the lithium hexafluorophosphate crystals attached to the surface of the crystal attachment sheet 6021 during the process of separating the crystal attachment sheet 6021 from the limiting hole 6013, thereby improving the convenience of lithium hexafluorophosphate crystal recovery. There is no need to clean the crystals on the crystal attachment sheet 6021 individually, thereby improving the recovery efficiency.

[0064] like Figure 1 、 Figure 6 In some embodiments, a plurality of equally spaced magnetic strips 6023 are provided at the bottom of the wafer connection plate 6022 of the present invention.

[0065] A driving motor 7 is provided at the bottom of the synthesis container 1 , and a magnetic coupling member 8 is provided at the output end of the driving motor 7 . The magnetic coupling member 8 is magnetically coupled to the magnetic strip 6023 .

[0066] Through the above technical solution, when the drive motor 7 drives the magnetic coupling member 8 to rotate, the magnetic coupling member 8 cooperates with the magnetic strip 6023 under the action of magnetism to drive the sheet connecting plate 6022 to rotate, thereby causing the crystal attachment sheet 6021 to stir the LiF·HF solution in the synthesis container 1, thereby further improving the efficiency of the lithium hexafluorophosphate synthesis reaction.

[0067] Because magnetic coupling is used, the bottom of the synthesis vessel 1 does not need to worry about corrosion from the LiF·HF solution at the drive connection. Furthermore, the drive motor 7 and magnetic coupling 8 are located outside the synthesis vessel 1, away from corrosive substances. Therefore, the drive motor 7 and magnetic coupling 8 can be made of lower-cost conventional materials, and the drive motor 7 also achieves better heat dissipation.

[0068] like Figure 8As shown, in some embodiments, the magnetic coupling member 8 of the present invention includes a transmission disk 801. The axis of the bottom of the transmission disk 801 is connected to the output shaft of the drive motor 7, and is driven to rotate by the drive motor 7. A plurality of drive magnets 802 are disposed on the top of the transmission disk 801. The drive magnets 802 are magnetically connected to the magnetic strip 6023. When the transmission disk 801 rotates, the magnetic strip 6023 is pulled by the drive magnets 802, causing the wafer connection disk 6022 to rotate, thereby driving the crystal attachment plate 6021 and the support plate 6011 to rotate.

[0069] like Figure 7 、 Figure 9 and Figure 10 As shown, in some embodiments, a cavity is provided inside the transmission disc 801 of the present invention, and two power extraction slots 803 of different diameters but concentrically arranged are provided at the bottom of the transmission disc 801. The power extraction slots 803 are in communication with the cavity inside the transmission disc 801.

[0070] The driving magnet 802 is an electromagnet, specifically comprising an electromagnetic generator 8021 and a driving magnetic strip 8023. The electromagnetic generator 8021 is located within the cavity of the transmission disc 801. The positive and negative poles of the transmission disc 801 are connected to electrode plates 8022, respectively. The two annular electrode plates 8022 are located within the two power extraction slots 803. The electrode plates 8022 are electrically connected to an external power supply 9. By connecting an external power source to the power supply 9, and then electrically connecting the power supply 9 to the electrode plates 8022, the electromagnetic generator 8021 is powered, thereby generating magnetism.

[0071] The driving magnetic strip 8023 is set on the top of the transmission disk 801. The electromagnetic generator 8021 that generates magnetism when powered on comes into contact with the driving magnetic strip 8023, thereby magnetizing the driving magnetic strip 8023 to generate magnetism, thereby driving the sheet connecting disk 6022 to rotate with the rotation of the driving magnetic strip 8023.

[0072] like Figure 7 As shown, in some embodiments, the power supply 9 of the present invention includes an electrode positive-negative converter 901, and the positive and negative electrodes of the electrode positive-negative converter 901 respectively extend into two power supply antennae 902. The ends of the two power supply antennae 902 respectively extend into the interior of the power extraction slot 803 and contact and electrically connect with the two electrode plates 8022. When the transmission disk 801 rotates, the power supply antennae 902 can continuously contact the electrode plates 8022 to supply power. In order to improve safety, the main body of the power supply antennae 902 is insulated except for the joints.

[0073] Through the above technical solution, after the electrode positive and negative converter 901 is connected to an external power supply, the current passes through the two power supply antennae 902 and contacts the two electrode plates 8022 respectively to power the electromagnetic generator 8021, causing the electromagnetic generator 8021 to generate magnetism. The magnetism generated by the electromagnetic generator 8021 cooperates with the magnetic strip 6023 to pull the sheet connecting disk 6022 to move;

[0074] The electrode positive / negative converter 901 houses a thyristor (SCR). The PN junction on the SCR conducts only when a sufficient trigger voltage is applied to the control terminal; otherwise, it remains off. The SCR has unidirectional conduction characteristics: current from the input terminal flows through the SCR to the output terminal. When the SCR conducts, the voltage polarity at the output terminal is opposite to that at the input terminal. When the electrode positive / negative converter 901 changes direction, the magnetic poles of the electromagnetic generator 8021 also change accordingly. Depending on the change in the magnetic poles of the electromagnetic generator 8021, the wafer connecting plate 6022 may sink to the bottom or float in the air due to attraction or repulsion between the magnetic poles, depending on the change in the magnetic poles. At this point, the driving magnetic strip 8023 drives the wafer connecting plate 6022 to rotate, achieving different levels of agitation for the LiF·HF solution within the synthesis container 1, further enhancing the synthesis reaction.

[0075] The specific use process of the present invention is as follows:

[0076] The lifting member 2 drives the pressurizing member 4 upward, exposing the opening of the synthesis vessel 1. A lithium salt dissolved in anhydrous hydrogen fluoride to form a LiF·HF solution is then metered in through the opening of the synthesis vessel 1, either directly or via the injection port. The lifting member 2 then drives the pressurizing member 4 into the interior of the synthesis vessel 1, sealing it. Simultaneously, the gas delivery member 5 injects a metered amount of PF5 gas into the synthesis vessel 1, initiating a synthesis reaction between the LiF·HF solution and the PF5 gas. While the synthesis reaction is ongoing, the lifting member 2 continues to drive the pressurizing member 4 downward, reducing the internal volume of the synthesis vessel 1 and increasing the internal pressure. This further activates the molecules of the LiF·HF solution and the PF5 gas, accelerating the synthesis reaction.

[0077] At this time, the drive motor 7 provided at the bottom of the synthesis container 1 drives the magnetic coupling member 8 to rotate, causing the crystal attachment member 6 inside the synthesis container 1 to rotate accordingly to stir the LiF·HF solution, thereby increasing the rate of the synthesis reaction and the uniformity of the fusion of the LiF·HF solution and the PF5 gas. The positive and negative poles of the current are changed at any time by the electrode positive and negative converter 901 to change the direction of the magnetic pole of the electromagnetic generator 8021, causing the sheet connecting plate 6022 to float up and down inside the synthesis container 1, thereby further improving the uniformity of stirring.

[0078] In summary, the processing and synthesis device for lithium hexafluorophosphate of the present invention is provided with a lifting drive member 2 on the outer surface of the synthesis container 1, and the lifting drive member 2 and the pressurizing member 4 are connected by a power connecting member 3. When the lithium hexafluorophosphate synthesis reaction is carried out, the lifting drive member 2 drives the pressurizing member 4 to move downward to compress the space inside the synthesis container 1, thereby increasing the pressure inside the synthesis container 1, improving the solubility of the LiF·HF solution, and accelerating the reaction rate between the LiF·HF solution and the PF5 gas.

[0079] At the same time, increasing the pressure inside the synthesis container 1 by compressing the space through the pressure member 4 consumes less energy than using a pressure pump to inject pressure into the synthesis container 1. Moreover, after the PF5 gas is partially consumed, the space inside the synthesis container 1 can be further compressed to allow the remaining PF5 gas to continue to react with the LiF·HF solution, thereby improving the completeness of the synthesis.

[0080] The present invention provides a gas pipe 501 on the pressure member 4 and a one-way valve ball 502 inside the gas pipe 501. When lithium hexafluorophosphate synthesis is performed, PF5 gas can be injected into the interior of the synthesis container 1 at any time through the gas pipe 501. The gas pipe 501 is kept away from the solution in the synthesis container 1, and the gas injection pipeline can be prevented from being blocked by crystals and corroded by anhydrous hydrogen fluoride.

[0081] At the same time, when the gas consumption inside the synthesis container 1 is low, the pressure inside the synthesis container 1 is greater than the pressure of the external PF5 gas injection, and the one-way valve ball 502 will be in a locked state, preventing the gas from continuing to enter the interior of the synthesis container 1, causing the internal pressure of the synthesis container 1 to overload, thereby protecting the equipment.

[0082] The present invention provides a support body 601 and a crystal attachment body 602 made of Hastelloy at the inner bottom of the synthesis container 1. When PF5 gas reacts with LiF·HF solution to generate lithium hexafluorophosphate crystals, the crystals adhere to the protruding outer surface of the crystal attachment body 602 and the top of the support body 601. After the crystal attachment body 6 is removed, the crystals can be separated. The edge of the support body 601 can also scrape off the crystals attached to the inner wall of the synthesis container 1, thereby improving the cleanliness of the interior of the synthesis container 1.

[0083] At the same time, when the crystal attachment sheet 6021 is pulled out of the limiting hole 6013 through the sheet connecting plate 6022, the crystals attached to the outer surface of the crystal attachment sheet 6021 will be scraped off due to the fit between the limiting hole 6013 and the crystal attachment sheet 6021, thereby improving the convenience of crystal recovery.

[0084] The present invention provides a magnetic strip 6023 at the bottom of the sheet connecting disk 6022 and a drive motor 7 at the bottom of the synthesis container 1 to drive the magnetic coupling member 8 to rotate, thereby driving the sheet connecting disk 6022 to rotate through magnetic coupling, thereby stirring the solution in the synthesis container 1 through the crystal attachment sheet 6021, further improving the synthesis efficiency. In addition, the drive motor 7 and the magnetic coupling member 8 are both located outside the synthesis container 1, which can effectively avoid corrosion.

[0085] At the same time, the drive motor 7 and the magnetic coupling member 8 can be made of common materials without the need to use corrosion-resistant Hastelloy, thereby achieving the effect of saving equipment preparation costs.

[0086] The present invention provides an electrode positive-negative converter 901 and a power supply antenna 902 to cooperate with the electromagnetic generator 8021 to power the electromagnetic generator 8021, so that the electromagnetic generator 8021 generates magnetic magnetization to drive the magnetic strip 8023. When the electrode positive-negative converter 901 changes the direction of the current, the direction of the magnetic pole generated by the electromagnetic generator 8021 will change. Through the principle of like charges repel and opposite charges attract, the sheet connecting disk 6022 is suspended in the middle of the synthesis container 1 or sinks to the bottom of the synthesis container 1. The up and down floating of the sheet connecting disk 6022 improves the stirring effect of the solution and improves the synthesis efficiency.

[0087] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A processing and synthesis device for lithium hexafluorophosphate, characterized in that: The invention comprises a synthesis container (1), wherein the outer surface of the synthesis container (1) is symmetrically provided with lifting drive members (2), the upper end of each lifting drive member (2) is provided with a power connection member (3), and the two power connection members (3) jointly support a pressurizing member (4); The pressurizing member (4) is coaxially arranged with the synthesis container (1), the diameter of the pressurizing member (4) is adapted to the inner diameter of the synthesis container (1), and an air supply member (5) is provided on the pressurizing member (4); The lifting drive member (2) is used to drive the pressurizing member (4) to enter the interior of the synthesis container (1) to compress the space inside the synthesis container (1) and increase the pressure; The inner bottom of the synthesis container (1) is provided with a crystallization attachment piece (6), and the crystallization attachment piece (6) can be taken out from the interior of the synthesis container (1).

2. The processing and synthesis device for lithium hexafluorophosphate according to claim 1, characterized in that: The pressure member (4) includes a piston disc (401), the top edge of the piston disc (401) is symmetrically provided with a connecting groove (402), the depth of the connecting groove (402) does not exceed half the thickness of the piston disc (401), and the bottom of the connecting groove (402) is provided with a locking hole (403) that does not penetrate the piston disc (401); The outer surface of the piston disc (401) is a smooth surface, and the outer surface of the piston disc (401) is in contact with the inner wall of the synthesis container (1).

3. The processing and synthesis device for lithium hexafluorophosphate according to claim 2, characterized in that: The power connecting member (3) is Z-shaped, the upper portion of the power connecting member (3) is connected to the top of the lifting drive member (2) via a locking device, and the lower portion of the power connecting member (3) is connected to the interior of the connecting groove (402) via a locking device.

4. The processing and synthesis device for lithium hexafluorophosphate according to claim 1, characterized in that: The air delivery member (5) comprises an air delivery pipe (501), the air delivery pipe (501) is in fluid communication with the bottom of the pressurizing member (4), and a one-way valve ball (502) is provided inside the air delivery pipe (501).

5. The processing and synthesis device for lithium hexafluorophosphate according to claim 1, characterized in that: The crystallization attachment (6) comprises a support (601) and a crystallization attachment (602), wherein the support (601) is placed on the inner bottom of the synthesis container (1), and the outer surface of the support (601) is in contact with the inner wall of the synthesis container (1), and the crystallization attachment (602) is arranged above the support (601).

6. The processing and synthesis device for lithium hexafluorophosphate according to claim 5, characterized in that: The support body (601) comprises a support plate (6011), a mounting groove (6012) is provided at the bottom of the support plate (6011), and a plurality of limiting holes (6013) are provided at the top of the support plate (6011) and extend through the interior of the mounting groove (6012); The crystal attachment body (602) includes a sheet connection plate (6022), which is placed inside the mounting groove (6012), and the thickness of the sheet connection plate (6022) does not exceed the depth of the mounting groove (6012). The top of the sheet connection plate (6022) is provided with a crystal attachment plate (6021) that matches the number and position of the limiting holes (6013), and the crystal attachment plate (6021) passes through the limiting holes (6013) to the top of the support plate (6011).

7. The processing and synthesis device for lithium hexafluorophosphate according to claim 6, characterized in that: The bottom of the sheet connecting disk (6022) is provided with a plurality of equally spaced magnetic strips (6023); A driving motor (7) is provided at the bottom of the synthesis container (1), and a magnetic coupling member (8) is provided at the output end of the driving motor (7), wherein the magnetic coupling member (8) is magnetically coupled to the magnetic strip (6023).

8. The processing and synthesis device for lithium hexafluorophosphate according to claim 7, characterized in that: The magnetic coupling member (8) comprises a transmission disk (801), a plurality of driving magnets (802) are provided on the top of the transmission disk (801), and the driving magnets (802) are magnetically connected to the magnetic strip (6023).

9. The processing and synthesis device for lithium hexafluorophosphate according to claim 8, characterized in that: The transmission disc (801) is provided with a cavity inside, and the bottom of the transmission disc (801) is provided with two power extraction grooves (803) of different diameters but arranged concentrically, and the power extraction grooves (803) are connected to the cavity inside the transmission disc (801); The driving magnet (802) comprises an electromagnetic generator (8021) and a driving magnetic strip (8023); the electromagnetic generator (8021) is arranged inside the cavity of the transmission disk (801); the positive and negative poles of the transmission disk (801) are respectively connected to electrode plates (8022); the two electrode plates (8022) are annular and are respectively located inside the two power extraction slots (803); The driving magnetic strip (8023) is arranged on the top of the transmission disk (801), and the driving magnetic strip (8023) is magnetically connected to the electromagnetic generator (8021); The electrode plate (8022) is electrically connected to an external power supply (9).

10. The processing and synthesis device for lithium hexafluorophosphate according to claim 9, characterized in that: The power supply component (9) includes an electrode positive-negative converter (901), and the positive and negative electrodes of the electrode positive-negative converter (901) respectively extend into two power supply antennae (902), and the ends of the two power supply antennae (902) respectively extend into the interior of the power extraction slot (803) to contact and electrically connect with the two electrode plates (8022).

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