Reactor for preparing high-purity n-octylamine by using high selective hydrogenation catalyst

Abstract

The invention discloses a reactor for preparing high-purity n-octylamine by using a highly selective hydrogenation catalyst, and relates to the technical field of chemical reactors. Comprising a frame body which is fixedly connected with a reaction tank; the lead screw is rotationally connected to the reaction tank in a sealed manner, and the lead screw is fixedly connected with connecting pieces which are arranged in a mirror image manner; the movable shell is connected to the reaction tank in a sliding mode, the movable shell is rotationally connected with a rotating shell arranged in a mirror image mode, a first stirring frame arranged in a mirror image mode is rotationally connected between the rotating shell and the adjacent connecting piece, and the first stirring frame has flexibility. The first stirring frame is extruded by the rotating shell, the first stirring frame is compressed and deflected, and the angle between the first stirring frame and the horizontal plane is gradually reduced, so that the stirring area of the first stirring frame in the reaction tank is dynamically changed, the contact probability of different materials is improved, and the reaction (preparation) rate is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of chemical reactors, in particular to a reactor for preparing high-purity n-octylamine using a highly selective hydrogenation catalyst. Background Art

[0002] n-Octylamine is a saturated aliphatic amine compound, in the form of a colorless to pale yellow liquid, stable at room temperature, but flammable when exposed to open flames or high temperatures. n-Octylamine is widely used in organic synthesis, dye industry, rubber additives, surfactants and other fields. n-Octylamine is usually prepared by reductive amination of cyclooctanone and ammonia in a hydrogen environment. This process also requires the help of a catalyst to improve the reaction efficiency and selectivity.

[0003] In the process of preparing n-octylamine, in order to break the interface layer between the liquid phases, increase the contact area between the reactants and improve the mass transfer rate, the reactants usually need to be continuously stirred. However, in the existing preparation process, only a single stirring rod is used for stirring, and the resulting stirring area is small, making it difficult to fully contact the materials. In addition, due to the viscous texture of cyclooctanone, the insufficient contact between cyclooctanone and ammonia water is aggravated, resulting in low preparation efficiency of n-octylamine. Summary of the invention

[0004] In order to overcome the shortcomings mentioned in the above technical background, the present invention provides a reactor for preparing high-purity n-octylamine using a highly selective hydrogenation catalyst.

[0005] The technical solution is: a reactor for preparing high-purity n-octylamine with a highly selective hydrogenation catalyst, comprising: a frame, the frame is fixedly connected to a reaction tank, the reaction tank is provided with a feed pipe and a discharge pipe, and the reaction tank is fixedly connected to a distribution plate; a screw, sealed and rotatably connected to the reaction tank, the screw is rotatably connected to the distribution plate, the screw is fixedly connected to a connecting piece arranged in a mirror image, and the screw is slidably connected to a sliding sleeve arranged in a mirror image; a moving shell, slidably connected to the reaction tank, the moving shell is used to hold the catalyst, the moving shell is rotatably connected to a rotating shell arranged in a mirror image, a first stirring frame arranged in a mirror image is rotatably connected between the rotating shell and the adjacent connecting piece, the first stirring frame is retractable, and the first stirring frame is rotatably connected to the adjacent sliding sleeve; a power mechanism is arranged at the lower part of the reaction tank, used to make the moving shell and the reaction tank move relative to each other; a gas distribution mechanism is arranged at the lower part of the reaction tank, used to introduce hydrogen into the reaction tank to provide a reaction environment.

[0006] Further description, the power mechanism includes: a motor, installed on the reaction tank, the output shaft of the motor is fixedly connected to the screw, and the screw passes through the reaction tank; a sliding block, fixedly connected to the moving shell, and the screw is used to move the sliding block; a limiting protrusion, fixedly connected to the moving shell, and the reaction tank is provided with a first limiting groove, and the first limiting groove is used to limit the limiting protrusion.

[0007] It is further explained that the first limiting groove is a threaded groove, and the pitch of the first limiting groove is greater than the pitch of the thread groove on the lead screw, so as to enable the movable shell to rotate.

[0008] To further explain, the gas distribution mechanism includes: a gas transmission shell, rotatably connected to the reaction tank, the gas transmission shell is slidably connected and communicated with a circumferentially arranged gas separation shell, and the gas separation shell is provided with spaced gas outlet holes; a connecting pipe, fixedly connected to the reaction tank, the connecting pipe is communicated with the gas transmission shell, and the connecting pipe is connected to an external gas storage device; a limiting assembly is arranged on the lower side of the reaction tank, and is used to make the gas separation shell and the gas transmission shell slide relative to each other.

[0009] Further description, the limiting assembly includes: a limiting ring fixedly connected to the reaction tank, the limiting ring is provided with a second limiting groove, and the second limiting groove is used to extrude the gas separation shell.

[0010] It is further explained that the projection of the second limiting groove on the horizontal plane is a closed wave shape, which is used to enable the gas separation shell and the gas passing shell to slide continuously relative to each other.

[0011] It is further explained that the sliding sleeve is fixedly connected to a guide shell arranged in a mirror image, the guide shell is slidably connected to a moving part, the connecting part and the rotating shell and the adjacent moving part are all rotatably connected to a second stirring frame, and the second stirring frame is retractable.

[0012] Further description, there is also a spoiler mechanism, the number of which is the same as the number of the guide shells, and they are respectively arranged in adjacent guide shells. The spoiler mechanism includes: a first elastic sleeve, fixedly connected between the guide shell and the moving part, a second elastic sleeve fixedly connected between the guide shell and the moving part, the first elastic sleeve and the second elastic sleeve are respectively located on both sides of the moving part, and the guide shell is provided with a first hole and a second hole.

[0013] It is further specified that the first hole and the second hole on the same guide shell face opposite directions.

[0014] Further description, the connecting member is fixedly connected to the first guide plate and the second guide plate, the screw is provided with a liquid passage and a third hole arranged at intervals, the third hole is connected to the liquid passage, the first guide plate and the second guide plate are both arranged inclined, and the inclination directions of the two are opposite.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present invention squeezes the first stirring frame by rotating the shell, the first stirring frame is compressed and deflected, and the angle between the first stirring frame and the horizontal plane gradually decreases, thereby (dynamically) changing the stirring area of ​​the first stirring frame in the reaction tank, increasing the contact probability between different materials, and thus increasing the reaction (preparation) rate; at the same time, the relative deflection of the two first stirring frames is used to shear the materials in the adjacent areas, thereby forcibly dispersing the relatively viscous and difficult to disperse materials, and further increasing the reaction (preparation) rate; the rotating shell is used to drive the carrier balls therein to move together, so that the carrier balls are affected by the material resistance. The first elastic sleeve and the second elastic sleeve are used to stretch and reset the first elastic sleeve to generate a torrent in the reaction tank, which impacts the material in the reaction tank and improves the dispersion effect of viscous and difficult-to-disperse materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention when the movable shell and the rotating shell rotate relative to each other; Figure 3 It is a sectional view of the three-dimensional structure of the first stirring frame of the present invention during the contraction process; Figure 4 It is a three-dimensional structural cross-sectional view of the reaction tank of the present invention; Figure 5 It is a sectional view of the three-dimensional structure when the gas shell and the reaction tank of the present invention rotate relative to each other; Figure 6 It is a three-dimensional structural cross-sectional view of the gas-transmitting shell and the limiting ring of the present invention; Figure 7 It is a three-dimensional structural cross-sectional view of the lead screw and the guide housing of the present invention; Figure 8 It is a three-dimensional structural exploded view of the lead screw and the parts thereon of the present invention.

[0017] The meanings of the reference numerals in the figure are: 1-frame, 2-reaction tank, 3-material dividing plate, 4-screw, 5-connecting piece, 6-sliding sleeve, 7-movable shell, 8-rotating shell, 9-first stirring frame, 1001-motor, 1002-sliding block, 1003-limiting protrusion, 1004-first limiting groove, 1101-gas shell, 1102-gas dividing shell, 1103-gas outlet, 1104-connecting pipe, 1201-limiting ring, 1202-second limiting groove, 1301-guide shell, 1302-moving piece, 1303-second stirring frame, 1401-first elastic sleeve, 1402-second elastic sleeve, 1403-first hole, 1404-second hole, 1501-first guide plate, 1502-second guide plate, 1503-liquid passage, 1504-third hole. DETAILED DESCRIPTION

[0018] The present invention will now be described more fully below with reference to the accompanying drawings, in which currently preferred embodiments of the present invention are shown. However, the present invention may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness, and these embodiments fully convey the scope of the present invention to the skilled person.

[0019] like Figure 1-Figure 3 As shown, it is an embodiment of the present invention, which proposes a reactor for preparing high-purity n-octylamine with a highly selective hydrogenation catalyst, so as to solve the problem that the existing reactor has a single stirring means, a small stirring area, and it is difficult to fully stir the material, resulting in low preparation efficiency, comprising: a frame 1, the frame 1 is fixedly connected to a reaction tank 2, the reaction tank 2 is provided with a feed pipe and a discharge pipe, the reaction tank 2 is fixedly connected to a distribution plate 3; a screw 4, which is sealed and rotatably connected to the reaction tank 2, the screw 4 is rotatably connected to the distribution plate 3, the screw 4 is fixedly connected to a connector 5 arranged in a mirror image, and the screw 4 is slidably connected to the reaction tank 2. A sliding sleeve 6 is arranged in a mirror image; a moving shell 7 is slidably connected to the reaction tank 2, the moving shell 7 is used to hold the catalyst, the moving shell 7 is rotatably connected to a rotating shell 8 arranged in a mirror image, a first stirring frame 9 arranged in a mirror image is rotatably connected between the rotating shell 8 and the adjacent connecting piece 5, the first stirring frame 9 is retractable, and the first stirring frame 9 is rotatably connected to the adjacent sliding sleeve 6; a power mechanism is arranged at the lower part of the reaction tank 2, and is used to make the moving shell 7 and the reaction tank 2 move relative to each other; a gas distribution mechanism is arranged at the lower part of the reaction tank 2, and is used to introduce hydrogen into the reaction tank 2, thereby providing a reaction environment.

[0020] In the above scheme, the frame 1 is welded by steel sections, the feed pipe and the discharge pipe on the reaction tank 2 are respectively located on the upper and lower sides of the reaction tank 2, the feed pipe on the reaction tank 2 is connected to the external storage equipment, and the discharge pipe on the reaction tank 2 is connected to the external receiving equipment, and valves are provided at the above two connections, the dividing plate 3 is conical, and the cone head faces upward, and evenly arranged feeding holes are provided thereon, and the feeding holes on the dividing plate 3 are used to evenly arrange the materials, the catalyst in the moving shell 7 is attached to the carrier ball, that is, the moving shell 7 is provided with a carrier ball, and the carrier ball is made of non-metallic material, the stirring frame 9 is a rectangular frame, and is composed of two guide parts and a U-shaped rod, and the guide part The U-shaped rod is rotatably connected to the sliding sleeve 6, and the U-shaped rod is rotatably connected to the adjacent connecting piece 5. The mirror-arranged first stirring frames 9 are staggered with each other. When using the present invention, the staff adds materials (including cyclooctanone and ammonia water, and n-octylamine is prepared by the reaction of the two) into the feed pipe on the reaction tank 2. After the materials enter the reaction tank 2, they fall downward onto the dividing plate 3. The materials flow outward along the upper side of the dividing plate 3. When the materials pass through the feed holes on the dividing plate 3, the materials continue to fall downward through the feed holes on the dividing plate 3. The materials are gradually accumulated in the reaction tank 2 until the liquid level of the materials in the reaction tank 2 is about to contact the lower side of the dividing plate 3. The materials are stopped from being added, and the power mechanism is used to rotate the lead screw 4 counterclockwise (such as Figure 2 Taking the top view as an example), the lead screw 4 drives the connecting piece 5 to rotate counterclockwise, and the connecting piece 5 drives the first stirring frame 9 to rotate counterclockwise (the first stirring frame 9 drives the sliding sleeve 6 to rotate counterclockwise), so as to stir the material in the reaction tank 2. During the process, the power mechanism also drives the movable shell 7 to drive the rotating shell 8 to move upward (for the convenience of description, the action of the movable shell 7 and its upper parts is taken as an example), and the rotating shell 8 squeezes the two first stirring frames 9. The two first stirring frames 9 are compressed and deflected, and the angle (included angle) between the two first stirring frames 9 gradually decreases, thereby (dynamically) changing the stirring area of ​​the first stirring frame 9 in the reaction tank 2, increasing the contact probability between different materials, and thereby increasing the reaction (preparation) rate. At the same time, the relative deflection of the two first stirring frames 9 is used to shear the materials in the adjacent areas, so as to forcibly disperse the more viscous and difficult to disperse materials, thereby further increasing the reaction (preparation) rate.

[0021] As the screw 4 continues to rotate counterclockwise, the movable shell 7 drives the rotating shell 8 to move continuously upward. When the rotating shell 8 moves upward to the limit position, the screw 4 starts to move the movable shell 7 downward through the power mechanism. The movable shell 7 drives the rotating shell 8 to move downward together, and the first stirring frame 9 gradually resets. This reciprocating cycle is repeated until the preparation of n-octylamine is completed. During the process, the gas distribution mechanism continuously fills hydrogen into the reaction tank 2, and the movable shell 7 also drives the carrier balls therein to move up and down. During the process, the carrier balls move up and down due to the resistance of the material and collide with each other. In this way, the material adhered to the surface of the carrier balls is removed to prevent the material from covering the carrier balls, thereby causing uneven contact between the material and the catalyst and reducing the preparation rate.

[0022] like Figure 1-Figure 4 As shown, the power mechanism includes: a motor 1001, which is installed on the reaction tank 2, and the output shaft of the motor 1001 is fixedly connected to the screw 4, and the screw 4 passes through the reaction tank 2; a sliding block 1002, which is fixedly connected to the moving shell 7, and the screw 4 is used to move the sliding block 1002; a limiting protrusion 1003, which is fixedly connected to the moving shell 7, and the reaction tank 2 is provided with a first limiting groove 1004, and the first limiting groove 1004 is used to limit the limiting protrusion 1003, and the first limiting groove 1004 is a threaded groove, and the pitch of the first limiting groove 1004 is greater than the pitch of the thread groove on the screw 4, which is used to rotate the moving shell 7.

[0023] In the above scheme, the lead screw 4 is a prior art (there is a spiral groove on it), and its detailed working principle is not described in detail here. During the counterclockwise rotation of the lead screw 4, the lead screw 4 drives the sliding block 1002 to move upward, and the sliding block 1002 drives the rotating shell 8 to move upward together through the moving shell 7, and the moving shell 7 drives the limiting protrusion 1003 to move upward together, and the limiting protrusion 1003 begins to slide in the first limiting groove 1004. During the process, the limiting protrusion 1003 drives the moving shell 7 to rotate counterclockwise, and the moving shell 7 and the rotating shell 8 rotate relative to each other. The carrier balls in the movable shell 7 also move in the horizontal direction, increasing the movement diversity of the carrier balls, further improving the removal effect of the materials adhering to the carrier balls, and at the same time disturbing the materials in the adjacent areas, thereby increasing the preparation rate. After the rotating shell 8 moves upward to the limit position, the output shaft of the motor 1001 drives the lead screw 4 to rotate in the opposite direction (clockwise), so that the movable shell 7 moves downward again. After the movable shell 7 is completely reset, the output shaft of the motor 1001 is reversed, so that the movable shell 7 moves up and down reciprocatingly until the preparation of n-octylamine is completed.

[0024] like Figure 2 , Figure 3 and Figure 5-Figure 8As shown, the gas distribution mechanism includes: a gas shell 1101, which is rotatably connected to the reaction tank 2, and the gas shell 1101 is slidably connected and communicated with a circumferentially arranged gas separation shell 1102, and the gas separation shell 1102 is provided with spaced gas outlet holes 1103; a connecting pipe 1104, which is fixedly connected to the reaction tank 2, and the connecting pipe 1104 is communicated with the gas shell 1101, and the connecting pipe 1104 is communicated with an external gas storage device; a limiting component, which is arranged on the lower side of the reaction tank 2, and is used to make the gas separation shell 1102 and the gas shell 1101 slide relative to each other; the limiting component includes: a limiting ring 1201, which is fixedly connected to the reaction tank 2, and the limiting ring 1201 is arranged There is a second limiting groove 1202, which is used to squeeze the gas separation shell 1102. The projection of the second limiting groove 1202 on the horizontal plane is a closed wave shape, which is used to make the gas separation shell 1102 and the gas passing shell 1101 continuously slide relative to each other. The sliding sleeve 6 is fixedly connected to a guide shell 1301 arranged in a mirror image. The guide shell 1301 is slidably connected to a moving part 1302. The guide shell 1301 is provided with a mirror image arrangement of notches for the moving part 1302 to slide. The connecting part 5 and the rotating shell 8 are rotatably connected to the adjacent moving part 1302 with a second stirring frame 1303, and the second stirring frame 1303 is retractable.

[0025] In the above scheme, the second stirring frame 1303 is a U-shaped frame, and is composed of a U-shaped frame and two telescopic rods. The U-shaped frame is rotatably connected to the adjacent connecting member 5, and the telescopic rod is rotatably connected to the adjacent moving member 1302. Gas is blown into the gas shell 1101 through an external gas storage device and a connecting pipe 1104 (the gas is hydrogen, which provides the required environment for the reaction, thereby activating the catalyst, increasing the activity of the catalyst and improving the selectivity of the catalyst for the characteristic structure, thereby increasing the preparation rate and the purity of the prepared n-octylamine), and hydrogen enters the gas separation shell 1102 from the gas shell 1101, and then the hydrogen is discharged from the gas outlet 1103 into the reaction tank 2. The hydrogen moves upward under the action of buoyancy, and then the hydrogen contacts the catalyst to improve the activity of the catalyst.

[0026] During the counterclockwise rotation of the screw 4, the screw 4 drives the gas shell 1101 to rotate counterclockwise together, and the gas shell 1101 and the reaction tank 2 rotate relative to each other, and the gas shell 1101 drives the gas separation shell 1102 to rotate together, thereby changing the position of the hydrogen when it enters the reaction tank 2, so that the hydrogen is evenly distributed circumferentially in the reaction tank 2. During the process, the gas separation shell 1102 slides in the second limiting groove 1202, and the second limiting groove 1202 limits the gas separation shell 1102, so that the gas separation shell 1102 moves back and forth along its own radial direction, thereby further changing the initial position of the hydrogen in the reaction tank 2, and continuously changing the stirring state of the gas separation shell 1102 on the material in the reaction tank 2, thereby increasing the disturbance degree of all materials in the reaction tank 2, and thereby improving the preparation efficiency.

[0027] During the counterclockwise rotation of the sliding sleeve 6 (connecting member 5), the sliding sleeve 6 drives the guide shell 1301 to rotate counterclockwise, and the guide shell 1301 drives the moving member 1302 to rotate counterclockwise. During the upward movement of the rotating shell 8, the rotating shell 8 squeezes the second stirring frame 1303, and the second stirring frame 1303 is deflected and compressed, thereby further enhancing the stirring degree of the material in the reaction tank 2 and further improving the preparation efficiency.

[0028] like Figure 5 , Figure 7 and Figure 8 As shown, a spoiler mechanism is also included, the number of which is the same as the number of guide shells 1301, and they are respectively arranged in adjacent guide shells 1301, and the spoiler mechanism includes: a first elastic sleeve 1401, fixedly connected between the guide shell 1301 and the moving part 1302, a second elastic sleeve 1402 is fixedly connected between the guide shell 1301 and the moving part 1302, the first elastic sleeve 1401 and the second elastic sleeve 1402 are respectively located on both sides of the moving part 1302, the guide shell 1301 is provided with a first hole 1403 and a second hole 1404, the first hole 1403 and the second hole 1404 on the same guide shell 1301 face oppositely, and are used to disturb the material in the reaction tank 2.

[0029] In the above scheme, the first elastic sleeve 1401 and the second elastic sleeve 1402 are both made of elastic rubber. The first elastic sleeve 1401 is initially in a stretched state. One side of the first elastic sleeve 1401 is fixedly connected to the side of the guide shell 1301 close to the sliding sleeve 6, and the other side of the first elastic sleeve 1401 is fixedly connected to the moving part 1302, and the guide shell 1301 is located between the moving part 1302 and the second hole 1404. One side of the second elastic sleeve 1402 is fixedly connected to the moving part 1302, and the other side of the second elastic sleeve 1402 is fixedly connected to the side of the guide shell 1301 away from the sliding sleeve 6, and the second elastic sleeve 1402 is located between the moving part 1302 and the first hole 1403. The first elastic sleeve 1401 (the second elastic sleeve 1402) is used to block adjacent notches on the guide shell 1301. During the upward movement of the rotating shell 8 (the process of two adjacent second stirring frames 1303 approaching each other), the moving part 1302 slides to the right along the guide shell 1301 (now with Figure 7 Taking the movement of the middle guide shell 1301 and the parts thereon as an example), the moving part 1302 stretches the second elastic sleeve 1402 and extracts the material in the adjacent area of ​​the reaction tank 2 into the guide shell 1301 through the first hole 1403. During the process, the first elastic sleeve 1401 is gradually reset and the material inside is discharged through the second hole 1404, so that a torrent is generated in the reaction tank 2, which impacts the material in the reaction tank 2 and improves the dispersion effect of viscous materials that are difficult to disperse.

[0030] like Figure 5, Figure 7 and Figure 8 As shown, the connecting member 5 is fixedly connected to the first guide plate 1501 and the second guide plate 1502, the screw 4 is provided with a liquid passage 1503 and a third hole 1504 arranged at intervals, the third hole 1504 is connected to the liquid passage 1503, the first guide plate 1501 and the second guide plate 1502 are both arranged inclined, and the inclination directions of the two are opposite.

[0031] In the above scheme, there are multiple third holes 1504, which are respectively arranged on the upper and lower sides of the lead screw 4. The multiple third holes 1504 are divided into two groups, and the two groups of third holes 1504 are respectively located on the upper and lower sides of the liquid passage 1503, and each third hole 1504 corresponds to a first guide plate 1501 (second guide plate 1502). During the counterclockwise rotation of the lead screw 4, the lead screw 4 drives the first guide plate 1501 and the second guide plate 1502 to rotate counterclockwise together. The second guide plate 1502 squeezes the material in the adjacent area into the third hole 1504 on the lower side, and the first guide plate 1501 squeezes the material in the adjacent area to its outside, so that the material moves from bottom to top in the liquid passage 1503, and the material circulates up and down in the reaction tank 2, thereby improving the fluidity of the material and the contact degree between the material and the carrier balls, thereby improving the efficiency of preparing n-octylamine.

[0032] The above description is only an example of the present invention and is not intended to limit the present invention. Any equivalent substitutions made within the principles of the present invention should be included in the protection scope of the present invention. The contents not elaborated in detail in the present invention belong to the existing technologies known to those skilled in the art.

Claims

1. A reactor for preparing high-purity n-octylamine using a highly selective hydrogenation catalyst, characterized in that: Included are: A frame (1), the frame (1) being fixedly connected to a reaction tank (2), the reaction tank (2) being provided with a feed pipe and a discharge pipe, and the reaction tank (2) being fixedly connected to a material distribution plate (3); A lead screw (4) is sealingly rotatably connected to the reaction tank (2), the lead screw (4) is rotatably connected to the material distribution plate (3), the lead screw (4) is fixedly connected to a connecting piece (5) arranged in a mirror image, and the lead screw (4) is slidably connected to a sliding sleeve (6) arranged in a mirror image; A movable shell (7) is slidably connected to the reaction tank (2), the movable shell (7) is used to contain the catalyst, the movable shell (7) is rotatably connected to a rotating shell (8) arranged in a mirror image, a first stirring frame (9) arranged in a mirror image is rotatably connected between the rotating shell (8) and the adjacent connecting member (5), the first stirring frame (9) is retractable, and the first stirring frame (9) is rotatably connected to the adjacent sliding sleeve (6); A power mechanism, arranged at the lower part of the reaction tank (2), and used for causing the movable shell (7) and the reaction tank (2) to move relative to each other; The gas distribution mechanism is arranged at the lower part of the reaction tank (2) and is used to introduce hydrogen into the reaction tank (2) to provide a reaction environment.

2. The reactor for preparing high-purity n-octylamine using a highly selective hydrogenation catalyst according to claim 1, characterized in that: The power mechanism comprises: A motor (1001) is mounted on the reaction tank (2); an output shaft of the motor (1001) is fixedly connected to the lead screw (4); and the lead screw (4) passes through the reaction tank (2); A sliding block (1002) is fixedly connected to the moving shell (7), and the lead screw (4) is used to move the sliding block (1002); The limiting protrusion (1003) is fixedly connected to the movable shell (7), and the reaction tank (2) is provided with a first limiting groove (1004), and the first limiting groove (1004) is used to limit the limiting protrusion (1003).

3. A reactor for preparing high-purity n-octylamine using a highly selective hydrogenation catalyst according to claim 2, characterized in that: The first limiting groove (1004) is a threaded groove, and the pitch of the first limiting groove (1004) is greater than the pitch of the thread groove on the lead screw (4), and is used to cause the movable shell (7) to rotate.

4. The reactor for preparing high-purity n-octylamine using a highly selective hydrogenation catalyst according to claim 1, characterized in that: The air distribution mechanism comprises: A gas-transmitting shell (1101) is rotatably connected to the reaction tank (2); the gas-transmitting shell (1101) is slidably connected to and communicates with a circumferentially arranged gas-dividing shell (1102); the gas-dividing shell (1102) is provided with gas outlet holes (1103) arranged at intervals; A connecting pipe (1104) is fixedly connected to the reaction tank (2), the connecting pipe (1104) is in communication with the gas shell (1101), and the connecting pipe (1104) is in communication with an external gas storage device; A limit assembly is arranged at the lower side of the reaction tank (2) and is used to enable the gas separation shell (1102) and the gas passing shell (1101) to slide relative to each other.

5. The reactor for preparing high-purity n-octylamine using a highly selective hydrogenation catalyst according to claim 4, characterized in that: The limit assembly includes: A limiting ring (1201) is fixedly connected to the reaction tank (2); the limiting ring (1201) is provided with a second limiting groove (1202); the second limiting groove (1202) is used to squeeze the gas separation shell (1102).

6. The reactor for preparing high-purity n-octylamine using a highly selective hydrogenation catalyst according to claim 5, characterized in that: The projection of the second limiting groove (1202) on the horizontal plane is a closed wave shape, which is used to enable the gas separation shell (1102) and the gas passing shell (1101) to slide continuously relative to each other.

7. The reactor for preparing high-purity n-octylamine using a highly selective hydrogenation catalyst according to claim 1, characterized in that: The sliding sleeve (6) is fixedly connected to a guide shell (1301) arranged in a mirror image, the guide shell (1301) is slidably connected to a moving member (1302), the connecting member (5) and the rotating shell (8) are rotatably connected to a second stirring frame (1303) between the adjacent moving member (1302), and the second stirring frame (1303) is retractable.

8. The reactor for preparing high-purity n-octylamine using a highly selective hydrogenation catalyst according to claim 7, characterized in that: It also includes a spoiler mechanism, the number of which is the same as the number of the guide shells (1301), which are respectively arranged in adjacent guide shells (1301), and the spoiler mechanism includes: A first elastic sleeve (1401) is fixedly connected between the guide shell (1301) and the moving part (1302); a second elastic sleeve (1402) is fixedly connected between the guide shell (1301) and the moving part (1302); the first elastic sleeve (1401) and the second elastic sleeve (1402) are respectively located on both sides of the moving part (1302); and the guide shell (1301) is provided with a first hole (1403) and a second hole (1404).

9. The reactor for preparing high-purity n-octylamine using a highly selective hydrogenation catalyst according to claim 8, characterized in that: The first hole (1403) and the second hole (1404) on the same guide shell (1301) face in opposite directions.

10. The reactor for preparing high-purity n-octylamine using a highly selective hydrogenation catalyst according to claim 7, characterized in that: The connecting member (5) is fixedly connected to a first guide plate (1501) and a second guide plate (1502); the lead screw (4) is provided with a liquid passage (1503) and third holes (1504) arranged at intervals; the third holes (1504) are in communication with the liquid passage (1503); the first guide plate (1501) and the second guide plate (1502) are both arranged in an inclined manner, and the inclination directions of the two are opposite.

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