Device for converting high-purity yellow phosphorus into electronic-grade high-purity red phosphorus

Abstract

The utility model discloses a device for converting high-purity yellow phosphorus into electronic-grade high-purity red phosphorus, which relates to the technical field of yellow phosphorus conversion devices, solves the problem of low yellow phosphorus conversion efficiency, and comprises a conversion furnace, the conversion furnace comprises a conversion furnace cover and a conversion furnace base, and a sealing rubber ring is arranged at the bottom of the conversion furnace cover. One side of the top end of the converter cover is connected with a converter cover lifting device, the converter cover lifting device is mounted on one side of an operating table, a converter base is mounted on the operating table through a bracket, a converter heating device is mounted on the converter base, and a converter temperature monitoring and converter argon filling interface is further arranged on the converter base. And a yellow phosphorus conversion container is mounted at the top end of the converter heating device. According to the utility model, high-purity yellow phosphorus is placed in an open container under the protection of pure water, a closed conversion device taking argon as shielding gas is placed in the open container, a closed space is formed through a metal outer cover, and the high-purity yellow phosphorus is converted into electronic-grade high-purity red phosphorus by pressurizing and heating in a high-pressure inert gas environment.

Description

Technical Field

[0001] This utility model relates to the technical field of yellow phosphorus conversion devices, specifically a device for converting high-purity yellow phosphorus into electronic-grade high-purity red phosphorus. Background Technology

[0002] Electronic-grade high-purity red phosphorus, typically referring to dense red phosphorus with a purity of 99.99995% or higher, has crucial applications in numerous fields. In the semiconductor industry, it is primarily used to prepare III-V compound semiconductor materials such as InP, GaP, and GaAsP, and is also a dopant for silicon and germanium single crystals. Furthermore, electronic-grade high-purity red phosphorus plays a vital role in integrated circuit and optoelectronic device manufacturing; for example, red phosphorus vapor phase epitaxy (VPE) is one of the important processes for achieving high-quality growth of advanced semiconductor materials. In the electronics and electrical appliance fields, high-purity phosphorus is an important raw material for manufacturing high-definition display devices such as cathode ray tubes (CRTs) and field emission displays (FEDs), and is also used in the manufacture of magnetic materials, such as high-temperature ceramics.

[0003] Currently, there are two main methods for converting yellow phosphorus to red phosphorus: atmospheric pressure conversion and pressurized conversion. Atmospheric pressure conversion requires cooling and depressurizing the conversion vessel and releasing the exhaust gas during the heating process to maintain atmospheric pressure throughout the conversion. However, this method has significant drawbacks: the conversion process is time-consuming, energy-intensive, and the product particle size and conversion rate are unsatisfactory. Pressurized conversion, on the other hand, uses nitrogen or argon as a protective gas during the heating process to maintain a certain pressure, allowing yellow phosphorus to convert to red phosphorus in the container. This method is carried out in a closed container, making the conversion of yellow phosphorus safer under the protection of an inert gas. The resulting red phosphorus product is more thorough and denser than that obtained through atmospheric pressure conversion, with a shorter conversion cycle and lower energy consumption, making it a more ideal conversion method.

[0004] Regarding related patents, patent publication number CN207030952U discloses a device for converting yellow phosphorus to red phosphorus, which uses an atmospheric pressure conversion vessel to control the conversion temperature by controlling the temperature of the inner jacket. Patent publication number CN212655473U discloses a yellow phosphorus conversion furnace, also an atmospheric pressure conversion furnace. This furnace body consists of an upper section, a middle section, and a lower section connected sequentially from top to bottom, solving the problem of exhaust port blockage and eliminating safety hazards. However, atmospheric pressure conversion equipment generally has defects; during the heating and conversion process, some yellow phosphorus vaporizes and escapes with the exhaust gas, making it difficult to guarantee the particle size and conversion rate of the converted red phosphorus product. A system for converting high-purity yellow phosphorus to red phosphorus, with patent authorization announcement number CN220788063U, is a closed pressurized conversion system. Its conversion container is a quartz container. Although it can achieve the goals of low energy consumption, high yield, and clean and environmentally friendly, the quartz container needs to maintain a balance between the external and internal pressures when sealing the raw material conversion. Moreover, the quartz material has poor pressure resistance, and it may rupture if the internal and external pressure difference is too large, causing the conversion process to fail.

[0005] In summary, existing technologies and equipment for converting yellow phosphorus to red phosphorus have many shortcomings, and there is an urgent need to develop a more efficient, safe, and stable method and apparatus for converting yellow phosphorus to red phosphorus. Utility Model Content

[0006] To address the aforementioned problems, specifically those raised in the background section, this invention proposes a device for converting high-purity yellow phosphorus into electronic-grade high-purity red phosphorus. The device includes a conversion furnace, comprising a furnace hood and a furnace base. A sealing ring is installed at the bottom of the furnace hood, and a furnace hood lifting device is connected to one side of the top of the furnace hood. The furnace hood lifting device is mounted on one side of an operating platform. The furnace base is mounted on the operating platform via a bracket, and a conversion furnace heating device is installed on the furnace base. The furnace base also includes a conversion furnace temperature monitoring and conversion... The furnace has an argon gas charging port, and a yellow phosphorus conversion container is installed at the top of the furnace heating device. The furnace hood lifting device includes a furnace lifting motor, which is connected to a lifting arm via a transmission component. One end of the lifting arm is slidably connected to a lifting shaft via a sliding device, and the other end of the lifting arm is connected to the furnace hood. A furnace gas venting port is provided on one side of the top of the furnace hood. The furnace gas venting port is connected to a furnace negative pressure vacuum pump via a venting pipeline. The furnace negative pressure vacuum pump is connected to a tail gas alkaline solution absorption device via a recovery pipeline.

[0007] A further feature of this invention is that a wiring point for the converter heating device is provided on one side of the converter heating device.

[0008] A further feature of this invention is that the venting pipeline is equipped with a converter vacuum pressure monitoring system and a converter negative pressure venting valve.

[0009] A further feature of this invention is that the argon gas charging port of the converter is connected to an argon gas inlet port via an argon gas charging pipeline, and the argon gas charging pipeline is equipped with an argon gas inlet pressure monitor and an argon gas inlet valve.

[0010] A further feature of this invention is that the converter lifting motor is electrically connected to a converter lifting motor control cabinet, and the converter lifting motor control cabinet is installed on one side of the bottom of the operating platform.

[0011] The beneficial technical effects of this invention are as follows: High-purity yellow phosphorus is placed in an open container under pure water protection, and then placed in a closed conversion device with argon as the protective gas. A sealed space is formed by a metal outer casing. Under high pressure and inert gas conditions, the high-purity yellow phosphorus is pressurized and heated, converting it into electronic-grade high-purity red phosphorus. The heating and conversion process is automatic and reliable, directly pressurizing the material without pressure difference, avoiding container rupture, improving raw material utilization and conversion rate, shortening conversion time, reducing energy consumption, and ensuring that the gas after conversion is absorbed by alkaline solution without pollution emissions. This achieves safety, environmental protection, and energy saving, and the produced electronic-grade red phosphorus is of higher quality. Attached Figure Description

[0012] Figure 1 A schematic diagram of the furnace cover lifting structure of this utility model is shown.

[0013] Figure 2 The front view of the converter furnace hood of this utility model being lowered is shown.

[0014] Figure 3 The diagram shows a side view of the converter furnace hood of this invention in a lowered position.

[0015] Figure 4 A bottom view of the converter furnace hood is shown.

[0016] Reference numerals: 1. Furnace hood; 2. Lifting arm; 3. Furnace lifting motor; 4. Argon gas inlet pressure monitoring; 5. Argon gas inlet valve; 6. Argon gas inlet interface; 7. Yellow phosphorus conversion container; 8. Furnace heating device; 9. Furnace base; 10. Furnace gas venting interface; 11. Furnace vacuum pressure monitoring; 12. Furnace negative pressure venting valve; 13. Furnace temperature monitoring; 14. Furnace argon gas charging interface; 15. Furnace negative pressure vacuum pump; 16. Tail gas alkali absorption device; 17. Furnace lifting motor control cabinet; 18. Furnace heating device wiring point; 19. Sealing ring. Detailed Implementation

[0017] The following is a reference to the appendix. Figure 1-4The preferred embodiments of this utility model are described below. Those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this utility model and are not intended to limit the scope of protection of this utility model.

[0018] This invention proposes a device for converting high-purity yellow phosphorus into electronic-grade high-purity red phosphorus, including a conversion furnace. High-purity yellow phosphorus in an open container is placed inside a high-pressure conversion hood and converted into dense, blocky electronic-grade high-purity red phosphorus under the protection of high-pressure gas. The conversion furnace includes a furnace cover 1 and a furnace base 9. A sealing ring 19 is provided at the bottom of the furnace cover 1. After lowering, it is fastened to the furnace base 9 to form a sealed conversion space. Simultaneously, the furnace cover 1 uses a metal outer cover, which isolates the high-temperature and high-pressure environment. When the furnace cover 1 is lowered, two detachable C-shaped clamps are also provided on its outer wall for a tighter sealing effect.

[0019] A furnace cover lifting device is connected to one side of the top of the furnace cover 1. The furnace cover lifting device is installed on one side of the operating table. A furnace base 9 is installed on the operating table via a bracket. A furnace heating device 8 is installed on the furnace base 9. A furnace temperature monitoring device 13 and a furnace argon gas charging interface 14 are also provided on the furnace base 9. The furnace temperature monitoring device 13 can monitor the internal temperature of the furnace in real time and control the temperature within a suitable range. The furnace argon gas charging interface 14 facilitates the charging of argon gas into the furnace, allowing high-pressure inert gas to be charged into the furnace. Under high pressure, only a small amount of yellow phosphorus molecules escape from the liquid phase into the gas phase, improving the utilization rate of raw materials.

[0020] The top of the heating device 8 of the conversion furnace is equipped with a yellow phosphorus conversion container 7. High-purity yellow phosphorus is placed in the yellow phosphorus conversion container 7 and transferred to the inside for conversion. During the conversion process, the material is pressurized as a whole without generating a pressure difference, so that the conversion process will not fail due to container rupture. The conversion process is safe and efficient.

[0021] The furnace hood lifting device includes a converter lifting motor 3, which serves as the power source for the entire lifting device. The converter lifting motor 3 is connected to the lifting arm 2 via a transmission component, specifically a gear. A drive gear is fixedly mounted on the output shaft of the converter lifting motor 3, and a driven gear is positioned at a matching location. The driven gear is mounted on the lifting shaft via a key connection or other fixing method. The drive gear and driven gear mesh with each other, thereby transmitting power from the motor to the lifting shaft. One end of the lifting arm 2 is slidably connected to the lifting shaft via a sliding device, allowing the lifting arm 2 to slide up and down along the axial direction of the lifting shaft.

[0022] The other end of the lifting arm 2 is connected to the furnace hood 1, allowing the furnace hood 1 to be freely raised and lowered, facilitating the convenient and quick loading and unloading of materials. A furnace gas venting port 10 is located on one side of the top of the furnace hood 1. This port 10 functions to vent internal gas and create negative pressure within the furnace. The furnace gas venting port 10 is connected to a furnace negative pressure vacuum pump 15 via a venting pipeline. The furnace negative pressure vacuum pump 15 is connected to a tail gas alkali absorption device 16 via a recovery pipeline. The tail gas alkali absorption device 16 absorbs phosphorus vapor from the discharged tail gas, ensuring a safe and environmentally friendly conversion process.

[0023] A conversion furnace heating device 8 is provided with a conversion furnace heating device connection point 18 on one side. The conversion furnace heating device connection point 18 realizes the heating function of the conversion furnace heating device 8. The conversion furnace heating device connection point 18 is interlocked with the conversion furnace temperature monitoring 13 to control the output power of the conversion furnace heating device 8. The automatic temperature control device enables the conversion furnace to accurately heat up according to the set temperature curve. The precise conversion temperature control ensures higher product conversion rate and product quality, while achieving energy-saving and high-efficiency effects and making it more economical.

[0024] The venting pipeline is equipped with a converter vacuum pressure monitoring system 11 and a converter negative pressure venting valve 12. By observing the converter vacuum pressure monitoring system 11 and adjusting the converter negative pressure venting valve 12, the negative pressure value inside the converter can be controlled within a suitable range.

[0025] Argon gas charging port 14 of the converter is connected to argon gas inlet port 6 via an argon gas charging pipeline. The argon gas charging pipeline is equipped with argon gas inlet pressure monitoring 4 and argon gas inlet valve 5. Argon gas inlet pressure monitoring 4 and argon gas inlet valve 5 are interlocked. By observing argon gas inlet pressure monitoring 4 and adjusting argon gas inlet valve 5, the pressure value inside the converter can be controlled within a suitable range.

[0026] The converter lifting motor 3 is electrically connected to the converter lifting motor control cabinet 17. The converter lifting motor control cabinet 17 controls the converter lifting motor 3 to lift the lifting arm 2 to a suitable position, so that materials can be loaded or removed from the converter. The converter lifting motor control cabinet 17 is installed on one side of the bottom of the operating table.

[0027] Operating steps:

[0028] S1. The converter hood 1 is raised to a certain height under the control of the lifting arm 2;

[0029] S2. Place the cooled yellow phosphorus into the yellow phosphorus conversion container 7 under the protection of pure water;

[0030] S3. Control the lifting arm 2 to descend, so that the converter cover 1 and the converter base 9 form a sealed space and turn on the converter negative pressure vacuum pump 15. Under the monitoring of the converter vacuum pressure monitoring 11, the air in the converter is extracted to a negative pressure of -0.098Mpa.

[0031] S4. After the gas extraction is completed, close the negative pressure vent valve 12 and the negative pressure vacuum pump 15 of the converter, open the argon inlet valve 5, and under the monitoring of the argon inlet pressure monitor 4, charge 0.2 MPa of argon into the converter through the argon inlet port 6. After reaching the pressure, turn on the converter heating device 8 to raise the temperature to 110°C and maintain it for 1 hour; charge 0.1 MPa of argon again, set the converter heating curve and start the second heating. The entire temperature rise process takes about 5 hours, and the temperature is raised to 280°C according to the preset time; after maintaining the temperature at 280°C for 5 hours, charge 0.3 MPa of argon again, raise the temperature to 360°C, maintain the temperature for 2 hours, and then cool down.

[0032] S5. After the temperature drops to room temperature, the pressure inside the converter is gradually released to atmospheric pressure through the negative pressure vent valve 12 of the converter.

[0033] S6. Control the lifting arm 2 to lift the conversion furnace cover 1 and remove the blocky electronic-grade red phosphorus from the yellow phosphorus conversion container 7.

[0034] Existing equipment manufacturers and models

[0035] Existing equipment factory model lifting arm DUFF NORTON LCM1801 Conversion furnace lifting motor BALDOR L3504 Conversion furnace heating device Higer Instruments XMTF-8411 Conversion furnace negative pressure vacuum pump Hiron fluid 2X-8 Conversion furnace lifting motor control cabinet B-LINE, INC 70706

[0036] Although the present invention has been described with reference to preferred embodiments, various modifications can be made to it and components can be replaced with equivalents without departing from the scope of the present invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0037] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0040] The technical solution of this utility model has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. An apparatus for converting high-purity yellow phosphorus into electronic-grade high-purity red phosphorus, comprising a conversion furnace, characterized in that: The converter includes a converter cover (1) and a converter base (9). A sealing ring (19) is provided at the bottom of the converter cover (1). A converter cover lifting device is connected to one side of the top of the converter cover (1). The converter cover lifting device is installed on one side of the operating table. The converter base (9) is installed on the operating table by a bracket. A converter heating device (8) is installed on the converter base (9). A converter temperature monitoring device (13) and a converter argon gas charging interface (14) are also provided on the converter base (9). A yellow phosphorus conversion container (7) is installed at the top of the converter heating device (8). The furnace hood lifting device includes a converter lifting motor (3), which is connected to a lifting arm (2) via a transmission component. One end of the lifting arm (2) is slidably connected to the lifting shaft via a sliding device, and the other end of the lifting arm (2) is connected to a converter hood (1). A converter gas venting port (10) is provided on one side of the top of the converter hood (1). The converter gas venting port (10) is connected to a converter negative pressure vacuum pump (15) via a venting pipe. The converter negative pressure vacuum pump (15) is connected to a tail gas alkaline solution absorption device (16) via a recovery pipe.

2. The apparatus for converting high-purity yellow phosphorus into electronic-grade high-purity red phosphorus according to claim 1, characterized in that: A converter heating device connection point (18) is provided on one side of the converter heating device (8).

3. The apparatus for converting high-purity yellow phosphorus into electronic-grade high-purity red phosphorus according to claim 1, characterized in that: The venting pipeline is equipped with a converter vacuum pressure monitoring (11) and a converter negative pressure venting valve (12).

4. The apparatus for converting high-purity yellow phosphorus into electronic-grade high-purity red phosphorus according to claim 1, characterized in that: The argon gas charging port (14) of the converter is connected to the argon gas inlet port (6) through the argon charging pipeline. The argon charging pipeline is equipped with argon gas inlet pressure monitoring (4) and argon gas inlet valve (5).

5. The apparatus for converting high-purity yellow phosphorus into electronic-grade high-purity red phosphorus according to claim 1, characterized in that: The converter lifting motor (3) is electrically connected to the converter lifting motor control cabinet (17), which is installed on one side of the bottom of the operating table.

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