High-pressure hydrogenation kettle for preparing platinum-carbon catalyst
By introducing a hydrogen circulation mechanism and a sampling mechanism into the high-pressure hydrogenation reactor, the problems of insufficient contact between hydrogen and materials and difficulty in sampling are solved, realizing full utilization of hydrogen and efficient sampling, and ensuring the normal progress of the reaction.
Patent Information
- Application Number
- CN202423303512.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The existing high-pressure hydrogenation reactors suffer from insufficient contact between hydrogen and materials, as well as difficulties in sampling.
A high-pressure hydrogenation reactor was designed, which includes a hydrogen circulation mechanism and a sampling mechanism. The hydrogen is recycled through the coordinated movement of the stirring shaft and the piston, and the sampling plug is sealed and sampled by an electric push rod.
This method achieves full contact between hydrogen and materials, saving hydrogen consumption, while ensuring sealed sampling under high pressure, thus not affecting the reaction process.
Smart Images
Figure CN223811018U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to reaction kettle equipment technical field, concretely for the high pressure hydrogenation kettle for preparing platinum carbon catalyst. BACKGROUND
[0002] The preparation method of platinum carbon catalyst mainly includes impregnation method, precipitation method, chemical reduction method and gas phase deposition method etc. Among them, the chemical reduction method is often combined with high pressure hydrogenation technology to improve the dispersion of platinum and the overall performance of the catalyst. In the high pressure hydrogenation kettle, the platinum precursor (such as platinum chloride or platinic acid salt) is converted into metallic platinum in the reducing environment of hydrogen, and is uniformly loaded on the carbon carrier. Hydrogen is generally added from the bottom, so that hydrogen can contact with the material when moving upward, and only part of the hydrogen can contact with the surface material after the excess hydrogen moves to the top of the inside of the high pressure hydrogenation kettle, and the rest of the hydrogen cannot contact with the material, which has the problem of insufficient contact, and also has the problem of difficult sampling due to the high pressure state inside the kettle body. SUMMARY
[0003] In view of the defects of the prior art, the utility model provides a high pressure hydrogenation kettle for preparing platinum carbon catalyst, which solves the technical problems of incomplete contact of hydrogen with the material and difficult sampling.
[0004] To solve the above technical problems, the utility model provides the following technical scheme: a high pressure hydrogenation kettle for preparing platinum carbon catalyst, comprising a kettle body, a motor is installed at the top of the kettle body, a bevel gear one is fixed on the output shaft of the motor, a bevel gear two is meshed on one side of the bevel gear one, the bevel gear two is fixed at the top of the stirring shaft, the stirring shaft extends into the kettle body and is fixed with stirring blades at the bottom thereof, a hydrogen circulation mechanism connected with the motor is installed on the outside of the kettle body, and a sampling mechanism is fixed on the outer wall of the kettle body.
[0005] The hydrogen circulation mechanism comprises a transmission assembly connected with the motor, a piston rod is connected with the transmission assembly, a piston is fixed at the bottom of the piston rod, the piston is movably connected in the cylinder, the cylinder is installed on the outside of the kettle body, the bottom of the cylinder is connected with an upper communication pipe and a lower communication pipe, a one-way valve is installed on the upper communication pipe and the lower communication pipe, and the upper communication pipe and the lower communication pipe are connected to the top and the bottom of the inside of the kettle body respectively.
[0006] Preferably, the transmission assembly comprises a driving wheel fixed on the output shaft of the motor, the driving wheel is in transmission connection with a driven wheel through a belt, the driven wheel is rotatably connected to a fixed frame through a rotating shaft, the fixed frame is fixed on the kettle body, a rotating block is further fixed at one end of the rotating shaft, and the rotating block is hingedly connected to the top of the piston rod through a connecting rod.
[0007] Preferably, the sampling mechanism comprises a sampling tube fixed to the outer wall of the kettle body, an electric push rod is installed at one end of the sampling tube, a movable sampling plug is fixed to the telescopic shaft of the electric push rod and movably connected in the sampling tube, a sampling hole is formed in the sampling plug, and a sampling bottle is detachably connected to the bottom of the sampling tube.
[0008] Preferably, the outer wall of the kettle body is connected with a feeding pipe and a discharging pipe.
[0009] Preferably, the bottom of the kettle body is connected with an air inlet pipe, one end of the air inlet pipe is connected with an annular pipe in the kettle body, and a plurality of air holes are arranged on the annular pipe and the lower communication pipe.
[0010] Preferably, the top of the kettle body is provided with a thermometer and a pressure gauge.
[0011] By the above technical scheme, the high-pressure hydrogenation kettle for preparing platinum-carbon catalyst is provided, and at least has the following beneficial effects:
[0012] 1. The high-pressure hydrogenation kettle for preparing platinum-carbon catalyst, by setting the hydrogen circulation mechanism, when the motor operates and stirs the materials in the kettle body, the hydrogen at the top of the kettle body is re-pumped into the bottom of the kettle body by the up-down reciprocating movement of the piston, and then the hydrogen contacts with the materials along the upward movement route again, so that the full contact is realized and the hydrogen consumption is saved.
[0013] 2. The high-pressure hydrogenation kettle for preparing platinum-carbon catalyst, by setting the sampling mechanism, the electric push rod drives the sampling plug to move, because the sampling hole is arranged on the sampling plug, when the sampling hole is exposed to the sampling tube, the materials in the kettle body enter into the sampling hole, and when the sampling plug is reset, the materials in the sampling hole can enter into the sampling bottle, so that the sealed sampling is realized, the high-pressure environment in the kettle body is not changed, and the normal reaction is not affected. BRIEF DESCRIPTION OF DRAWINGS
[0014] The drawings described herein are used to provide further understanding of the present application and form a part of the present application:
[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present application;
[0016] Figure 2 It is a schematic diagram of the structure inside the kettle body of the present application;
[0017] Figure 3 It is a schematic diagram of the structure of the hydrogen circulation mechanism of the present application;
[0018] Figure 4 It is a schematic diagram of the structure of the sampling mechanism of the present application;
[0019] Reference signs:
[0020] 1, kettle body; 2, motor; 3, bevel gear one; 4, bevel gear two; 5, stirring shaft; 6, stirring blade; 7, hydrogen circulation mechanism; 701, transmission assembly; 7011, driving wheel; 7012, belt; 7013, driven wheel; 7014, fixed frame; 7015, rotating block; 7016, connecting rod; 702, piston rod; 703, piston; 704, cylinder; 705, upper communication pipe; 706, lower communication pipe; 707, check valve; 8, sampling mechanism; 801, sampling tube; 802, electric push rod; 803, sampling plug; 8031, sampling hole; 804, sampling bottle; 9, air inlet pipe; 10, annular pipe; 11, feed pipe; 12, discharge pipe; 13, thermometer; 14, pressure gauge. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0022] Platinum carbon catalyst has wide application in catalytic reaction, especially in chemical synthesis, petroleum refining and environmental protection catalysis and other fields. Platinum, as a kind of noble metal catalyst, is widely used in hydrogenation, oxidation and isomerization reaction due to its excellent catalytic activity and stability. In the preparation process of platinum catalyst, the loading, dispersion and metal particle size control of platinum are the key factors to determine the performance of the catalyst.
[0023] Example one:
[0024] Based on the technical defects that hydrogen cannot be fully contacted with materials and sampling is difficult in the prior art, please refer to Figures 1-4The high-pressure hydrogenation kettle for preparing platinum carbon catalyst can realize full contact of materials and hydrogen and can save hydrogen consumption, the high-pressure hydrogenation kettle comprises a kettle body 1, a motor 2 is installed at the top of the kettle body 1, a bevel gear one 3 is fixed on the output shaft of the motor 2, a bevel gear two 4 is meshed with one side of the bevel gear one 3, the bevel gear two 4 is fixedly connected to the top of a stirring shaft 5, the stirring shaft 5 extends into the kettle body 1 and is fixedly provided with stirring blades 6 at the bottom thereof, a hydrogen circulation mechanism 7 connected with the motor 2 is installed on the outside of the kettle body 1, and a sampling mechanism 8 is fixedly arranged on the outer wall of the kettle body 1; in use, hydrogen is first introduced into the kettle body 1, the motor 2 is operated and the bevel gear one 3 and the bevel gear two 4 are meshed, so that the stirring shaft 5 and the stirring blades 6 are driven to rotate, thereby stirring work is carried out, at the same time, under the action of the hydrogen circulation mechanism 7, hydrogen at the top of the kettle body 1 is returned to the bottom, so that the recycling of hydrogen is realized, and finally, under the action of the sampling mechanism 8, sampling detection work can be carried out during operation.
[0025] Generally, hydrogen is added from the bottom, so that the hydrogen can contact the materials when moving upwards, and after the excess hydrogen moves to the top of the inside of the high-pressure hydrogenation kettle, only part of the hydrogen contacts the materials on the surface, and the rest of the hydrogen cannot contact the materials, and the problem of insufficient contact exists, in order to solve the problem, please refer to Figure 3 The hydrogen circulation mechanism 7 comprises a transmission assembly 701 connected with the motor 2, a piston rod 702 is connected to the transmission assembly 701, a piston 703 is fixedly arranged at the bottom of the piston rod 702, the piston 703 is movably connected in a cylinder body 704, the cylinder body 704 is installed on the outside of the kettle body 1, an upper communication pipe 705 and a lower communication pipe 706 are connected to the bottom of the cylinder body 704, one-way valves 707 are installed on the upper communication pipe 705 and the lower communication pipe 706, and the upper communication pipe 705 and the lower communication pipe 706 are connected to the top and the bottom of the inside of the kettle body 1 respectively; under the action of the transmission assembly 701, the motor 2 can drive the piston rod 702 to move up and down synchronously, the piston rod 702 drives the piston 703 to move up and down, and under the action of the upper communication pipe 705 and the lower communication pipe 706, since the one-way valves 707 are arranged on the upper communication pipe 705 and the lower communication pipe 706, the hydrogen at the top of the kettle body 1 can be drawn into the bottom of the kettle body 1 through the reciprocating movement of the piston 703, and then the hydrogen contacts the materials along the upward movement route again, so that full contact of the hydrogen and the materials can be realized.
[0026] When the hydrogen is recycled, the hydrogen recycling mechanism 7 needs to be powered, and in order to solve the power problem thereof, please refer to 3, the transmission assembly 701 includes a driving wheel 7011 fixed on the output shaft of the motor 2, the driving wheel 7011 is in transmission connection with a driven wheel 7013 through a belt 7012, the driven wheel 7013 is rotatably connected to a fixed frame 7014 through a rotating shaft, the fixed frame 7014 is fixedly arranged on the kettle body 1, one end of the rotating shaft is also fixedly provided with a rotating block 7015, the rotating block 7015 is hingedly connected to the top of the piston rod 702 through a connecting rod 7016; the motor 2 can drive the rotating block 7015 to rotate through the transmission action of the driving wheel 7011 and the driven wheel 7013, and the rotating block 7015 can drive the piston rod 702 to move up and down through the connecting rod 7016, thereby providing power for the movement of the piston 703.
[0027] In order to facilitate feeding and discharging, a feeding pipe 11 and a discharging pipe 12 are connected to the outer wall of the kettle body 1.
[0028] When the hydrogen is introduced into the kettle body 1, the hydrogen has a small contact area with the material after coming out of the gas inlet pipe 9, thereby affecting the reaction process, in order to avoid this problem, the gas inlet pipe 9 is connected to the bottom of the kettle body 1, one end of the gas inlet pipe 9 is connected to the annular pipe 10 inside the kettle body 1, and a plurality of gas holes are arranged on the annular pipe 10 and the lower communication pipe 706; through the arrangement of the annular pipe 10 and the plurality of gas holes arranged on the annular pipe 10, the hydrogen can be discharged through the plurality of gas holes, and the contact area of the hydrogen with the material can be increased.
[0029] The accurate control of the reaction temperature, pressure and time is crucial for the reduction and dispersion of platinum, therefore, a thermometer 13 and a pressure gauge 14 are installed on the top of the kettle body 1, the temperature and pressure inside the kettle body 1 are monitored in real time through the thermometer 13 and the pressure gauge 14, so as to ensure the normal progress of the reaction.
[0030] Example two:
[0031] During operation, the kettle body 1 is in a high-pressure state, so that the high-pressure state inside the kettle body 1 is destroyed by opening for sampling, thereby affecting the normal work of the kettle body 1, in order to avoid this problem, please refer to Figure 4The sampling mechanism 8 comprises a sampling tube 801 fixed on the outer wall of the kettle body 1, an electric push rod 802 is installed at one end of the sampling tube 801, a movable sampling plug 803 is movably connected in the sampling tube 801 on the telescopic shaft of the electric push rod 802, a sampling hole 8031 is formed in the sampling plug 803, and a sampling bottle 804 is detachably connected to the bottom of the sampling tube 801; when sampling detection is needed, the electric push rod 802 drives the sampling plug 803 to move, since the sampling hole 8031 is formed in the sampling plug 803, after the sampling hole 8031 is exposed from the sampling tube 801, the material in the kettle body 1 enters the sampling hole 8031, with the reset of the sampling plug 803, the material in the sampling hole 8031 can enter the sampling bottle 804, the sealed sampling can be realized, the high-pressure environment inside the kettle body 1 is not changed, and the normal reaction is not affected.
[0032] It should be noted that the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that comprise a list of elements not only include those elements, but also include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses.
[0033] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A high pressure hydrogenation autoclave for the preparation of platinum on carbon catalyst comprising an autoclave body (1), characterized in that: The top of the kettle body (1) is provided with a motor (2), a bevel gear one (3) is fixedly arranged on the output shaft of the motor (2), one side of the bevel gear one (3) is engaged with a bevel gear two (4), the bevel gear two (4) is fixedly connected to the top of the stirring shaft (5), the stirring shaft (5) extends into the kettle body (1) and is fixedly provided with stirring blades (6) at the bottom, the outer side of the kettle body (1) is provided with a hydrogen circulation mechanism (7) connected with the motor (2), and the outer wall of the kettle body (1) is fixedly provided with a sampling mechanism (8). The hydrogen circulation mechanism (7) comprises a transmission assembly (701) connected with the motor (2), a piston rod (702) connected with the transmission assembly (701), a piston (703) fixedly arranged at the bottom of the piston rod (702), the piston (703) movably connected in a cylinder (704), the cylinder (704) is installed on the outer side of the kettle body (1), the bottom of the cylinder (704) is connected with an upper communication pipe (705) and a lower communication pipe (706), the upper communication pipe (705) and the lower communication pipe (706) are both provided with a one-way valve (707), and the upper communication pipe (705) and the lower communication pipe (706) are connected to the top and the bottom of the inner side of the kettle body (1) respectively.
2. The high-pressure hydrothermal reactor for preparing a platinum carbon catalyst according to claim 1, characterized in that: The transmission assembly (701) comprises a driving wheel (7011) fixedly connected to the output shaft of the motor (2), the driving wheel (7011) is in transmission connection with a driven wheel (7013) through a belt (7012), the driven wheel (7013) is rotatably connected to a fixed frame (7014) through a rotating shaft, the fixed frame (7014) is fixedly arranged on the kettle body (1), one end of the rotating shaft is also fixedly provided with a rotating block (7015), and the rotating block (7015) is hingedly connected to the top of the piston rod (702) through a connecting rod (7016).
3. The high-pressure hydrothermal reactor for preparing platinum carbon catalyst according to claim 1, characterized in that: The sampling mechanism (8) comprises a sampling pipe (801) fixedly connected to the outer wall of the kettle body (1), a motorized push rod (802) mounted at one end of the sampling pipe (801), a sampling plug (803) fixedly arranged on the telescopic shaft of the motorized push rod (802) and movably connected in the sampling pipe (801), a sampling hole (8031) formed in the sampling plug (803), and a sampling bottle (804) detachably connected to the bottom of the sampling pipe (801).
4. The high-pressure hydrothermal reactor for preparing platinum-charcoal catalyst according to claim 1, characterized in that: The outer wall of the kettle body (1) is connected with a feeding pipe (11) and a discharging pipe (12).
5. The high-pressure hydrothrasher for preparing platinum-charcoal catalyst according to claim 1, characterized in that: The bottom of the kettle body (1) is connected with an air inlet pipe (9), one end of the air inlet pipe (9) is connected with an annular pipe (10) inside the kettle body (1), and the annular pipe (10) and the lower communication pipe (706) are both provided with a plurality of equidistantly distributed air holes.
6. The high-pressure hydrothrasher for preparing platinum-charcoal catalyst according to claim 1, characterized in that: The top of the kettle body (1) is provided with a thermometer (13) and a pressure gauge (14).