A holding vessel for heat treatment of noble metal catalysts

Abstract

The embodiment of the specification provides a containing vessel for noble metal catalyst heat treatment, which comprises a container body, the container body comprises a first cavity and a second cavity which are integrally formed, the inner diameter of the smallest part of the first cavity is larger than the inner diameter of the second cavity, a gas guide pipe is arranged at the connection part of the first cavity and the second cavity, the first end of the gas guide pipe is communicated with the first cavity, the second end of the gas guide pipe is closed, and a plurality of first air permeation holes are arranged on the closed second end of the gas guide pipe. The container body is formed by the first cavity and the second cavity with different inner diameters, the material is in the first cavity with a larger inner diameter, by arranging the second cavity with a smaller inner diameter, most of the material can be prevented from splashing, the problem that the material is scattered with the airflow is solved, the effect of reducing or avoiding the overflow of the material with the airflow is achieved, and meanwhile, by arranging the gas guide pipe and the first air permeation holes on the gas guide pipe, the airflow can be guided out, and the problem of insufficient airflow of the second cavity is solved.

Description

Technical Field

[0001] This specification relates to the field of heat treatment technology for precious metal catalysts, and specifically to a container for heat treatment of precious metal catalysts. Background Technology

[0002] In the preparation of precious metal catalysts, the catalysts typically undergo a heat treatment process. This process generally involves: 1. Placing the material in a crucible and placing the crucible inside the chamber of a heat treatment apparatus; 2. Evacuating the chamber of the heat treatment apparatus to remove air; 3. Introducing an inert gas and then heat treating.

[0003] General-purpose crucibles are usually open containers. If the material surface itself contains moisture, or if additional gas is generated when it interacts with the reactant gas in step 3, the material will splash in the vacuum chamber. Summary of the Invention

[0004] In view of this, the embodiments of this specification provide a container for heat treatment of precious metal catalysts. The container body is composed of a first cavity and a second cavity with different inner diameters. The material is placed in the first cavity with a larger inner diameter. By setting the second cavity with a smaller inner diameter, most of the material splashing can be prevented. At the same time, by setting a gas guide pipe and opening a first vent hole on the gas guide pipe, the airflow can be increased.

[0005] This specification provides the following technical solution in its embodiments: a container for heat treatment of precious metal catalysts, comprising: a container body, the container body including an integrally formed first cavity and a second cavity, the inner diameter of the smallest part of the first cavity being larger than the inner diameter of the second cavity, a gas guide pipe being provided at the connection between the first cavity and the second cavity, the first end of the gas guide pipe being connected to the first cavity, the second end of the gas guide pipe being closed, and the closed second end of the gas guide pipe having a plurality of first vent holes.

[0006] Preferably, the first cavity is a frustum-shaped cavity;

[0007] And / or, the second cavity is a cylindrical cavity.

[0008] Preferably, the larger end of the frustum cavity is closed, the smaller end of the frustum cavity is open, and the smaller end of the frustum cavity is connected to the cylindrical cavity.

[0009] Preferably, the inner diameter of the smaller end opening of the frustum is larger than the inner diameter of the cylindrical cavity.

[0010] Preferably, the air guide tube is inclined upward, and the second end of the air guide tube is in the same plane as the top end of the second cavity.

[0011] Preferably, the container further includes a cover, which is disposed on the end face of the second cavity away from the first cavity.

[0012] Preferably, the cover has a plurality of second ventilation holes.

[0013] Preferably, the cover is made of quartz sand core, the thickness of the top of the cover is 2-5 mm, and the diameter of the second vent hole is 20-30 μm, or 10-15 μm, or 4.5-9 μm, or 3-4 μm.

[0014] Preferably, the first cavity and the second cavity are bonded together by sintering.

[0015] Preferably, the container further includes a handle, the two ends of which are connected to the outer walls of the first cavity and the second cavity, respectively.

[0016] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least:

[0017] The container body is composed of a first cavity and a second cavity with different inner diameters. The material is placed in the first cavity with a larger inner diameter. By setting the second cavity with a smaller inner diameter, most of the material splashes out, which solves the problem of material drifting with the airflow and achieves the effect of reducing or avoiding material overflow with the airflow. At the same time, by setting the air guide pipe and opening the first vent hole on the air guide pipe, the airflow can be increased, which solves the problem of insufficient airflow in the second cavity. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the container for heat treatment of precious metal catalysts provided by the present invention.

[0020] Figure 2 This is a partial cross-sectional view of the container for heat treatment of precious metal catalysts provided by the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the cover of the container for heat treatment of precious metal catalysts provided by the present invention.

[0022] In the figure, 1 is the first cavity, 11 is the frustum cavity, 2 is the second cavity, 21 is the cylindrical cavity, 3 is the air duct, 4 is the first vent, 5 is the handle, 6 is the cover, and 7 is the second vent. Detailed Implementation

[0023] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0024] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0026] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0027] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0028] In the existing technology, crucibles are generally used to hold materials in the preparation process of precious metal catalysts. However, most crucibles are open containers. During the heat treatment process, when the gas reacts with the material, the material is prone to splashing in the vacuum chamber.

[0029] After extensive and in-depth experiments, the inventors designed a container for heat treatment of precious metal catalysts.

[0030] The technical problem solved by this invention is to avoid material splashing during the heat treatment of precious metal catalysts.

[0031] More specifically, the solution adopted in this invention includes: the container body is formed by a first cavity and a second cavity with different inner diameters. The material is placed in the first cavity with a larger inner diameter. By setting the second cavity with a smaller inner diameter, most of the material splashing can be prevented, thereby reducing or avoiding the overflow of material with the airflow. At the same time, by setting an air guide pipe and opening a first vent hole on the air guide pipe, the airflow can be increased.

[0032] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0033] like Figures 1-2 As shown, a container for heat treatment of precious metal catalysts includes: a container body, the container body including an integrally formed first cavity 1 and a second cavity 2, the first cavity 1 and the second cavity 2 being connected, the inner diameter of the smallest part of the first cavity 1 being larger than the inner diameter of the second cavity 2, a gas guide pipe 3 being provided at the connection between the first cavity 1 and the second cavity 2, the first end of the gas guide pipe 3 being connected to the first cavity 1, the second end of the gas guide pipe 3 being closed, and the second end of the closed gas guide pipe 3 having a plurality of first vent holes 4.

[0034] The container body is formed by a first cavity 1 and a second cavity 2 with different inner diameters. After the material is put into the container body, the material is in the first cavity 1. When the container body is in the vacuum chamber, the material or adsorbed gas is released. Since the inner diameter of the second cavity 2 is smaller than the inner diameter of the first cavity 1, when the material splashes, it will be blocked by the second cavity 2. The second cavity 2 can prevent most of the material from splashing. At the same time, a gas guide pipe 3 is set at the connection between the first cavity 1 and the second cavity 2, and several first vent holes 4 are opened on the closed end of the gas guide pipe 3. The first vent holes 4 connect the gas guide pipe 3 to the vacuum chamber, which can increase the airflow output in the container body.

[0035] It should be noted that the end of the first cavity 1 away from the second cavity 2 is closed. The first cavity 1 can be configured such that the inner diameter gradually decreases from the end away from the second cavity 2 to the end closer to the second cavity 2, so as to ensure that the inner wall of the first cavity 1 can block the material. At the same time, the inner diameter of the second cavity 2 is smaller than the minimum inner diameter of the first cavity 1, thereby preventing most of the material from splashing.

[0036] It should also be noted that the container body can be a crucible composed of a first cavity 1 and a second cavity 2 with different inner diameters, so as to ensure the effectiveness of the heat treatment process for the catalyst.

[0037] like Figures 1-2 As shown, in some embodiments, the first cavity 1 is a frustum cavity 11; the second cavity 2 is a cylindrical cavity 21. By setting the first cavity 1 as a frustum cavity 11, the inner diameter of the frustum cavity 11 gradually decreases from the large end to the small end. The second cavity 2 is set as a cylindrical cavity 21, and the inner diameter of the smaller end of the frustum cavity 11 is not less than the inner diameter of the cylindrical cavity 21. When the material is heat-treated, the container body is in a vacuum chamber, and the material is in the frustum cavity 11. Since the diameter of the upper cylindrical cavity 21 is smaller than that of the frustum cavity, it can prevent most of the material from splashing, thereby preventing the material from entering the vacuum chamber.

[0038] Furthermore, the larger end of the frustum cavity 11 is closed, and the smaller end of the frustum cavity 11 is open. The smaller end of the frustum cavity 11 is connected to the cylindrical cavity 21. By closing the larger end of the frustum cavity 11 and connecting the smaller end to the cylindrical cavity 21, the material is located at the closed end of the frustum cavity 11. When the material splashes upward, because the inner diameter of the frustum cavity 11 gradually decreases from bottom to top, and the smallest end of the frustum cavity 11 is connected to the cylindrical cavity 21, it can greatly prevent the material from splashing out of the container body and entering the vacuum chamber.

[0039] Furthermore, the inner diameter of the smaller end opening of the frustum is larger than the inner diameter of the cylindrical cavity 21. By setting the inner diameter of the cylindrical cavity 21 to be smaller than the inner diameter of the frustum cavity 11, the cylindrical cavity 21 can prevent the material inside the frustum cavity 11 from splashing out while ensuring gas flow.

[0040] like Figures 1-2 As shown, in some embodiments, the air guide pipe 3 is inclined upwards, and the second end of the air guide pipe 3 is in the same plane as the top end of the second cavity 2. By inclining the air guide pipe 3 upwards and making the top end of the air guide pipe 3 flush with the top end of the second cavity 2, splashed material can be prevented from blocking the first vent hole 4 at the second end of the air guide pipe 3.

[0041] It should be noted that in other embodiments, the top of the air duct 3 may be slightly higher than the top of the second cavity 2, and can be set according to the actual situation.

[0042] like Figures 1-3 As shown, in some embodiments, the container further includes a cover 6, which is disposed at the end face of the second cavity 2 away from the first cavity 1. By providing the cover 6, the cover 6 covers the top of the second cavity 2 and cooperates with it. When the material splashes to the top of the second cavity 2, the cover 6 can block the material, prevent the material from entering the vacuum cavity, completely prevent the material from overflowing with the airflow, and achieve complete non-splashing of the material.

[0043] like Figure 3 As shown, the cover 6 is further provided with a number of second vent holes 7. By providing second vent holes 7 on the cover 6, it is easy for gas inside the container to overflow. At the same time, the cover 6 can block the material and prevent the material from overflowing into the vacuum chamber with the airflow.

[0044] In some embodiments, the cover 6 is made of a quartz sand core, the thickness of the top of the cover 6 is 2-5 mm, and the pore size of the quartz sand core is 20-30 μm, or 10-15 μm, or 4.5-9 μm, or 3-4 μm, to adapt to retaining catalyst particles of different sizes during drying.

[0045] In some embodiments, the first cavity 1 and the second cavity 2 are bonded together by sintering. By bonding the first cavity 1 and the second cavity 2 together by sintering, a tight connection between the first cavity 1 and the second cavity 2 can be achieved, and the connection process between the first cavity 1 and the second cavity 2 is relatively convenient.

[0046] like Figures 1-2 As shown, in some embodiments, the container further includes a handle 5, the two ends of which are connected to the outer walls of the first cavity 1 and the second cavity 2, respectively. By providing the handle 5, the staff can hold the container through the handle 5, making it more convenient to hold the container.

[0047] Please see Figures 1-3 The specific usage of the container of this application will be described below:

[0048] In use, remove the cover 6, place the material into the container body, and the material falls to the bottom of the frustum cavity 11. Place the container body containing the material into the vacuum chamber of the vacuum furnace, evacuate the vacuum chamber to remove air, introduce an inert atmosphere into the vacuum chamber, and perform heat treatment. During the heat treatment of the material, the material or adsorbed gas is released, and the material splashes. Because the inner diameter of the frustum cavity 11 gradually decreases from bottom to top, and the smallest end of the frustum cavity 11 is connected to the cylindrical cavity 21, it can prevent most of the material from splashing. Material splashing is prevented from entering the vacuum chamber. For other small amounts of material, when the material splashes to the top of the second cavity 2, the cover 6 can block the material, preventing it from entering the vacuum chamber and completely preventing the material from overflowing with the airflow, thus achieving complete non-splashing. Several first vent holes 4 are opened on the closed end of the air guide pipe 3. The first vent holes 4 connect the air guide pipe 3 to the vacuum chamber, which can increase the airflow output from the container body. At the same time, the second vent holes 7 on the cover 6 can facilitate the overflow of gas from the container body.

[0049] The various embodiments in this specification can be referred to interchangeably for the same or similar parts. Each embodiment focuses on describing the differences from other embodiments. In particular, the method embodiments described later are relatively simple in description since they correspond to the system, and relevant parts can be referred to the descriptions in the system embodiments.

[0050] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A container for heat treatment of precious metal catalysts, characterized in that, include: The container body includes an integrally formed first cavity and a second cavity. A venting pipe is provided at the connection between the first cavity and the second cavity. The first end of the venting pipe is connected to the first cavity, and the second end of the venting pipe is closed. A plurality of first vent holes are provided at the closed second end of the venting pipe. The first cavity is a frustum-shaped cavity; the second cavity is a cylindrical cavity; The larger end of the frustum cavity is closed, the smaller end of the frustum cavity is open, and the smaller end of the frustum cavity is connected to the cylindrical cavity. The inner diameter of the smaller end opening of the frustum is larger than the inner diameter of the cylindrical cavity, which can prevent the material inside the frustum cavity from splashing out while ensuring gas flow. The air guide tube is inclined upward, and the second end of the air guide tube is in the same plane as the top end of the second cavity.

2. The container for heat treatment of precious metal catalysts according to claim 1, characterized in that, The container also includes a cover, which is disposed on the end face of the second cavity away from the first cavity.

3. The container for heat treatment of precious metal catalysts according to claim 2, characterized in that, The cover has several second ventilation holes.

4. The container for heat treatment of precious metal catalysts according to claim 3, characterized in that, The cover is made of quartz sand core, the thickness of the top of the cover is 2~5mm, and the diameter of the second vent hole is 20-30µm, or 10-15µm, or 4.5-9µm, or 3-4µm.

5. The container for heat treatment of precious metal catalysts according to claim 1, characterized in that, The first cavity and the second cavity are bonded together by sintering.

6. The container for heat treatment of precious metal catalysts according to claim 1, characterized in that, The container also includes a handle, the two ends of which are connected to the outer walls of the first cavity and the second cavity, respectively.

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