Electronic-grade potassium hydroxide ultrasonic production device
By using an ultrasonic generator and a stirring device in the potassium hydroxide crystallization process to control the crystallization process, the problem of traditional methods being difficult to achieve high purity and uniformity is solved, the production of high-purity potassium hydroxide with controllable particle size is achieved, and production costs are reduced.
Patent Information
- Application Number
- CN202422861579.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-11-22
AI Technical Summary
Traditional production methods have difficulty meeting the high purity and quality requirements of electronic-grade potassium hydroxide, especially the strict restrictions on metal ions and particulate matter.
An ultrasonic generator is used to adjust the power and frequency during the crystallization process. Combined with a stirring device and a cooling system, the potassium hydroxide crystallization process is controlled, and excessive crystal growth is reduced through heterogeneous nucleation, thereby improving purity and uniformity.
The potassium hydroxide crystal size is controllable, the particle size distribution is narrow and the purity is high, which reduces production energy consumption and meets the needs of the electronics industry.
Smart Images
Figure CN223404912U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic-grade potassium hydroxide, in particular to an ultrasonic production device for electronic-grade potassium hydroxide. Background Art
[0002] Electronic-grade potassium hydroxide (KOH) is a high-purity chemical primarily used in semiconductor manufacturing, flat-panel displays, solar cells, and other high-tech applications. With the rapid development of the electronics industry, the purity and quality requirements for electronic-grade potassium hydroxide are becoming increasingly stringent. Purity levels typically exceed 99.99%, with strict limits on metal ion and particulate matter content. Traditional production methods struggle to meet these stringent requirements.
[0003] Ultrasonic crystallization technology utilizes the mechanical and cavitation effects of ultrasound to promote crystal nucleation and growth, significantly improving the efficiency of the crystallization process and the purity of the product. The application of ultrasound helps: by providing additional energy, ultrasound can promote the nucleation process, resulting in finer crystals and improved product uniformity. By adjusting the ultrasonic parameters, the growth rate and size distribution of the crystals can be precisely controlled. The mechanical action of ultrasound helps remove impurities and encapsulated solvents from the crystal surface, thereby improving product purity. In view of this, the utility model provides an ultrasonic production device for electronic-grade potassium hydroxide. Utility Model Content
[0004] The primary purpose of this utility model is to provide an ultrasonic production device for electronic-grade potassium hydroxide. By providing an ultrasonic generator and adjusting its power and frequency, the crystallization process of potassium hydroxide can be controlled, resulting in a controlled size of the produced potassium hydroxide crystals, a narrow crystal size distribution, and high purity. This utility model significantly improves the purity and quality of electronic-grade potassium hydroxide, meeting the needs of the electronics industry.
[0005] An ultrasonic production device for electronic grade potassium hydroxide comprises a crystallization device and a centrifugal device, wherein the feed port of the crystallization device is connected to a material delivery pump through a pipeline.
[0006] The discharge port of the crystallization device is connected to the centrifugal device through a pipeline, and the pipeline extends into the interior of the centrifugal device and is connected to the inner tank of the centrifugal device;
[0007] A stirring device is provided at the top of the crystallization device for stirring the input saturated potassium hydroxide solution;
[0008] An ultrasonic generator is provided inside the crystallization device for ultrasonically treating the saturated potassium hydroxide solvent;
[0009] A distribution disk is provided inside the centrifugal device, and a pure water spraying device is provided on the top of the centrifugal device.
[0010] Preferably, the ultrasonic generator is vertically arranged in a ring-shaped manner in the middle and upper part of the crystallization device.
[0011] Preferably, the stirring device includes a stirring motor, a rotating shaft and a stirring paddle. The stirring motor is located at the top center of the crystallization device and is connected to the stirring paddle through the rotating shaft.
[0012] Preferably, the stirring paddle is located in the lower middle part of the crystallization device, and the stirring paddle is a frame-type stirring paddle.
[0013] More preferably, the shape of the bottom of the stirring paddle is consistent with the shape of the bottom of the crystallizer.
[0014] Preferably, the vertical distance between the stirring paddle and the ultrasonic generator is 5-20 cm.
[0015] More preferably, the vertical distance between the stirring paddle and the ultrasonic generator is 8-12 cm.
[0016] Preferably, a manual valve is provided on the pipeline connecting the crystallization device and the centrifugal device.
[0017] Preferably, a jacket is provided on the outside of the crystallization device, a cooling water outlet is provided on the top of the crystallization device, and a cooling water inlet is provided on the bottom of the crystallization device, and the crystallization device is cooled by passing cooling water into the jacket.
[0018] Preferably, the distribution tray is located directly below the feed port of the centrifugal device and is connected to the feed port, and the distribution tray is set in an inclined state.
[0019] More preferably, the inclination angle of the distribution tray is 45°.
[0020] Preferably, the pure water spraying device includes a pure water spraying port, which penetrates 5-10 cm into the interior of the centrifugal device. The pure water spraying port is connected to the pure water outlet through a pipe. The pure water outlet is evenly distributed with spray holes, and the diameter of the spray hole outlet is 0.5-2 mm, and the optimal diameter is 0.5-1 mm.
[0021] Preferably, a liquid outlet pipe is provided at a lower portion of the centrifugal device near the bottom for separating the centrifuge liquid.
[0022] Preferably, a support is fixedly connected to the middle of the outer side of the crystallization device, and the bottom of the centrifugal device is supported by legs.
[0023] Compared with the prior art, the present invention has the following beneficial effects:
[0024] 1. The ultrasonic production device for electronic-grade potassium hydroxide of this utility model produces potassium hydroxide crystals with controllable size, narrow crystal size distribution, and high purity. The introduction of an ultrasonic generator changes the solution crystallization nucleation mechanism from homogeneous nucleation to heterogeneous nucleation, significantly reducing the critical nucleation work, allowing the solution to nucleate and grow at lower supersaturation levels, and avoiding explosive nucleation and excessive crystal growth caused by artificially adding seed crystals that cause a sudden change in supersaturation in the solution system.
[0025] 2. The ultrasonic production device and process control of the utility model are simple. By adjusting the power and frequency of the ultrasonic generator, the potassium hydroxide crystallization process can be controlled. Compared with the traditional cooling crystallization process, the abnormal growth of crystals in the system can be greatly reduced.
[0026] 3. The ultrasonic production device of the present invention effectively improves the heat transfer effect of the cooling crystallization device, reduces the energy consumption of the production device, and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is a schematic structural diagram of an ultrasonic production device for electronic grade potassium hydroxide according to the present invention;
[0028] Figure 2 This is a schematic diagram of a stirring frame of an ultrasonic production device for electronic grade potassium hydroxide of the utility model;
[0029] Figure 3 This is a schematic diagram of an ultrasonic generator of an ultrasonic production device for electronic grade potassium hydroxide of the utility model;
[0030] Figure 4 This is a schematic diagram of a spray hole of a pure water spray port of an ultrasonic production device for electronic grade potassium hydroxide according to the present invention;
[0031] In the figure: 1 support leg, 2 centrifuge liner, 3 centrifuge, 4 distribution plate, 5 crystal paddle conveying pipe, 6 distribution plate motor, 7 manual valve, 8 jacket, 9 stirring paddle, 10 support, 11 cooling water outlet, 12 material delivery pump, 13 stirring motor, 14 ultrasonic generator, 15 crystallization device, 16 cooling water inlet, 17 pure water spray port, 18 pure water outlet, 19 centrifuge outer wall, 20 spray hole, 21 liquid outlet pipe. DETAILED DESCRIPTION
[0032] The technical solution of the present utility model is further described in detail below with reference to the accompanying drawings.
[0033] like Figure 1As shown, an electronic grade potassium hydroxide ultrasonic production device includes a crystallization device 15 and a centrifugal device 3, wherein the feed port of the crystallization device 15 is connected to the material delivery pump 12 through a pipeline; the discharge port of the crystallization device 15 is connected to the centrifugal device 3 through a pipeline, and the pipeline extends to the inside of the centrifugal device 3 and is connected to the centrifugal device liner 2; a stirring device is provided at the top position of the crystallization device 15 for stirring the input saturated potassium hydroxide solution; an ultrasonic generator 14 is provided inside the crystallization device 15 for ultrasonically treating the saturated potassium hydroxide solvent; a distribution disk 4 is provided inside the centrifugal device 15, and a pure water spraying device is provided on the top of the centrifugal device.
[0034] As a preferred embodiment, the ultrasonic generator 14 is vertically arranged in an annular manner in the middle and upper part of the crystallization device 15. The annular ultrasonic generator can provide uniform ultrasonic energy distribution, enhance mass transfer and heat transfer inside the solution, and improve the quality of potassium hydroxide crystals.
[0035] As a preferred solution, the stirring device includes a stirring motor 13, a rotating shaft and a stirring paddle 9. The stirring motor 13 is located at the top center of the crystallization device 15 and is connected to the stirring paddle 9 through the rotating shaft.
[0036] As a preferred solution, the stirring paddle 9 is located in the lower middle part of the crystallization device. The stirring paddle 9 is a frame-type stirring paddle, which can better promote the mixing and mass transfer of the solution and help prevent local oversaturation and uneven crystallization.
[0037] As a preferred solution, the shape of the bottom of the stirring paddle 9 is consistent with the shape of the bottom of the crystallization device 15, and the vertical distance between the stirring paddle 9 and the ultrasonic generator 14 is 5-20 cm.
[0038] As a preferred solution, the vertical distance between the stirring paddle 9 and the ultrasonic generator 14 is 8-12 cm, which ensures the synergistic effect of stirring and ultrasonic treatment and improves the uniformity of crystal nucleation and growth.
[0039] As a preferred solution, a manual valve 7 is provided on the pipeline connecting the crystallization device 15 and the centrifugal device 3 to control the potassium hydroxide solution after ultrasonic treatment to enter the centrifugal device 3.
[0040] As a preferred embodiment, a jacket 8 is provided on the outside of the crystallization device 15, a cooling water outlet 11 is provided on the upper part of the crystallization device 15, and a cooling water inlet 16 is provided on the bottom of the crystallization device. The crystallization device 15 is cooled by passing cooling water into the jacket 8 to achieve precise temperature reduction rate control, thereby affecting the crystallization process of potassium hydroxide.
[0041] As a preferred embodiment, the distribution tray 4 is located directly below the feed port of the centrifugal device 3 and is connected to the feed port, and the distribution tray 4 is in an inclined state; more preferably, the inclination angle of the distribution tray 4 is 45°, so that the ultrasonically treated potassium hydroxide solution evenly enters the material of the centrifugal device.
[0042] As a preferred solution, a liquid outlet pipe 21 is provided at the lower portion of the centrifugal device near the bottom for separating the centrifuge liquid.
[0043] As a preferred embodiment, the pure water spraying device includes a pure water spraying port 17, which is 5-10 cm deep into the interior of the centrifugal device 3 to ensure that pure water directly acts on the separated potassium hydroxide crystals, thereby improving the cleaning efficiency; the pure water spraying port 17 is connected to the pure water outlet 18 through a pipe, and the pure water outlet 18 is evenly distributed with spray holes 20, so that pure water is evenly covered on the crystal surface in the form of a fine stream or mist, thereby improving the cleaning effect and reducing water waste; the diameter of the spray hole 20 is 0.5-2 mm, and the optimal diameter is 0.5-1 mm, which improves the uniformity of cleaning.
[0044] As a preferred solution, a support 10 is fixedly connected to the middle of the outer side of the crystallization device 3, and there are two supports 10; the bottom of the centrifugal device is supported by legs 1, and there are three legs 1.
[0045] The working principle of the utility model is as follows: when in use, a high-temperature saturated potassium hydroxide solution is conveyed to a crystallization device 15 by a material conveying pump 12, a stirring device is turned on, and the saturated potassium hydroxide solution is ultrasonically treated by an ultrasonic generator 14; cooling water is introduced into a jacket 8 outside the crystallization device to cool the crystallization device, the cooling rate of the potassium hydroxide is regulated by adjusting the temperature and flow of the cooling water, the heat transfer and cooling of the potassium hydroxide solution are adjusted by adjusting the speed of the stirrer to obtain a supersaturated potassium hydroxide solution, the intensity and frequency of the ultrasonic generator 14 are adjusted, the supersaturated potassium hydroxide solution generates potassium hydroxide crystals, the generation rate, crystal size and morphology of the potassium hydroxide crystals are adjusted, and a potassium hydroxide mixed solution containing potassium hydroxide crystals with moderate crystal size and good uniformity can be obtained; then the potassium hydroxide mixed solution is conveyed to a centrifugal device 6 through a discharge pipe at the bottom of the crystallization device 15, and the crystals are separated from the solution. Pure water is continuously sprayed during the separation process to remove impurities that may be attached to the crystal surface to obtain high-purity potassium hydroxide crystals. The crystals are collected and dissolved in pure water to obtain an electronic grade potassium hydroxide solution.
[0046] The utility model regulates the size and crystallization rate of potassium hydroxide crystals by an ultrasonic generator to obtain a mixed solution containing potassium hydroxide crystals with moderate crystal size and good uniformity; separates the crystals from the solution by a centrifugal device; and adds pure water to dissolve the obtained crystals to obtain an electronic grade potassium hydroxide solution.
[0047] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.
Claims
1. An ultrasonic production device for electronic grade potassium hydroxide, characterized in that: It comprises a crystallization device (15) and a centrifugal device (3), wherein the feed port of the crystallization device (15) is connected to a material delivery pump (12) via a pipeline; The discharge port of the crystallization device (15) is connected to the centrifugal device (3) via a pipeline, and the pipeline extends into the interior of the centrifugal device and is connected to the inner container of the centrifugal device; A stirring device is provided at the top of the crystallization device (15) for stirring the input saturated potassium hydroxide solution; An ultrasonic generator (14) is provided inside the crystallization device (15) for ultrasonically treating the saturated potassium hydroxide solvent; A distribution disc (4) is provided inside the centrifugal device (3), and a pure water spraying device is provided on the top of the centrifugal device (3).
2. A kind of electronic grade potassium hydroxide ultrasonic production device according to claim 1, it is characterized in that: The ultrasonic generator (14) is vertically arranged in a ring-shaped manner in the middle and upper part of the crystallization device (15).
3. A kind of electronic grade potassium hydroxide ultrasonic production device according to claim 1, it is characterized in that: The stirring device comprises a stirring motor (13), a rotating shaft and a stirring paddle (9); the stirring motor (13) is located at the top center of the crystallization device (15) and is connected to the stirring paddle (9) via the rotating shaft.
4. A kind of electronic grade potassium hydroxide ultrasonic production device according to claim 3, it is characterized in that: The stirring paddle (9) is located in the middle and lower part of the crystallization device (15), and the stirring paddle (9) is a frame-type stirring paddle.
5. A kind of electronic grade potassium hydroxide ultrasonic production device according to claim 3, it is characterized in that: The vertical distance between the stirring paddle (9) and the ultrasonic generator (14) is 5-20 cm.
6. A kind of electronic grade potassium hydroxide ultrasonic production device according to claim 1, it is characterized in that: A manual valve (7) is provided on the pipeline connecting the crystallization device (15) and the centrifugal device (3).
7. A kind of electronic grade potassium hydroxide ultrasonic production device according to claim 1, it is characterized in that: The crystallization device (15) is provided with a jacket (8) on the outside, a cooling water outlet (11) is provided on the top of the crystallization device, and a cooling water inlet (16) is provided on the bottom of the crystallization device.
8. A kind of electronic grade potassium hydroxide ultrasonic production device according to claim 1, it is characterized in that: The distribution plate (4) is located directly below the feed port of the centrifugal device (3) and is connected to the feed port. The distribution plate (4) is arranged in an inclined state.
9. A kind of electronic grade potassium hydroxide ultrasonic production device according to claim 1, it is characterized in that: The pure water spraying device comprises a pure water spraying port (17), which is connected to a pure water outlet (18) via a pipe. Spray holes (20) are evenly distributed on the pure water outlet (18), and the diameter of the spray hole outlet is 0.5-2 mm.
10. An electronic grade potassium hydroxide ultrasonic production device according to claim 9, characterized in that: The pure water spray port (17) is 5-10 cm deep into the interior of the centrifugal device (3).