Reduced pressure distillation device for preparing trimesoyl chloride

Abstract

The utility model discloses a reduced pressure distillation device for preparing trimesoyl chloride, which comprises a manufacturing table, a raw material furnace is mounted on the left side of the manufacturing table, a distillation kettle is arranged in the middle of the manufacturing table, and a booster pump is arranged between the raw material furnace and the distillation kettle. The rotatable rotating sleeve is installed on the right side of the manufacturing table, the containing sleeves capable of containing the collecting barrels are installed on the two sides of the rotating sleeve, connection between the cooling barrel and the collecting barrels can be rapidly removed through the telescopic sleeve head at the bottom end of the cooling barrel, then the rotating sleeve outside the rotating shaft base is rotated, and the rotating sleeve drives the two containing sleeves to rotate by 180 degrees; the two sets of containing sleeves can rapidly drive the two sets of collecting barrels to be exchanged in position, so that the full collecting barrels can rapidly leave the position below the telescopic sleeve heads, the empty collecting barrels can accurately move to the position below the telescopic sleeve heads, butt joint between the collecting barrels and the cooling barrel is completed, the time needed for replacing the collecting barrels is shortened, the operation difficulty is reduced, and the working efficiency is improved. And the use convenience of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of organic synthesis, in particular to a vacuum distillation device for preparing trimellitic acid trichloride. Background Technique

[0002] Trimellitic acid trichloride is a light yellow solid powder at room temperature, with a pungent odor, and can be obtained by reacting triphosgene with trimellitic acid under the catalysis of a base. It belongs to a kind of acyl chloride and is a commonly used monomer in the preparation of polyamide reverse osmosis membranes and nanofiltration membranes. In addition, trimellitic acid trichloride can also be used to synthesize organic compounds such as photosensitive materials and dyes. During the preparation process of trimellitic acid trichloride, it is necessary to perform vacuum distillation on its raw materials. Currently, the existing vacuum distillation devices for preparing trimellitic acid trichloride can basically meet the daily use requirements, but there are still some deficiencies that need to be improved.

[0003] When the widely used vacuum distillation device for preparing trimellitic acid trichloride on the market is in use, trimellitic acid and thionyl chloride are used as raw materials for vacuum distillation in a distillation kettle to remove the excess solvent and thionyl chloride in the raw materials, and high-purity trimellitic acid trichloride is obtained. The distilled solvent and thionyl chloride will enter a collection bucket through a diversion pipe for collection, which is convenient for subsequent utilization. However, in the actual use process, once the collection bucket is full, in order to replace the collection bucket, not only does it take a long time to disassemble the collection bucket, but also it is necessary to reposition the position of the collection bucket, which takes a long time and is likely to cause the temperature inside the device to drop too much. Therefore, we propose a vacuum distillation device for preparing trimellitic acid trichloride to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide a vacuum distillation device for preparing trimellitic acid trichloride to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A vacuum distillation device for preparing trimellitic acid trichloride, including a manufacturing table, a raw material furnace is installed on the left side of the manufacturing table, a distillation kettle is arranged in the middle of the manufacturing table, a booster pump is arranged between the raw material furnace and the distillation kettle, the top of the distillation kettle is connected to a cooling cylinder through a diversion pipe, a telescopic socket is arranged at the bottom right of the cooling cylinder, a collection bucket is arranged on the right side of the manufacturing table, a liquid inlet is arranged on the collection bucket, a rotating shaft seat is installed on the right side of the manufacturing table, a rotating sleeve is rotatably connected to the rotating shaft seat, placing sleeves are connected to the outer walls on both sides of the rotating sleeve through connecting brackets, and a steering limit component is arranged at the top of the rotating sleeve.

[0006] As a further optimization of this technical solution, the steering limit assembly includes a sleeve, an active inner cavity, an active plate, positioning insertion rods, positioning holes, a connecting rod, a pull handle, and a return spring. A sleeve is fixed to the top end of the rotating shaft seat. An active inner cavity is provided inside the sleeve. An active plate is arranged inside the active inner cavity. Positioning insertion rods are fixed to both sides of the bottom end of the active plate. Two groups of positioning holes are provided at the top end of the rotating sleeve. The bottom ends of the two groups of positioning insertion rods can be inserted into the positioning holes. The outer wall of the top end of the active plate is connected to the pull handle through the connecting rod, and a return spring is wound around the outside of the connecting rod.

[0007] As a further optimization of this technical solution, the outer wall of the active plate is fully attached to the inner wall of the active inner cavity, and the active plate is slidably connected to the active inner cavity.

[0008] As a further optimization of this technical solution, the two ends of the return spring are respectively connected to the inner wall of the active inner cavity and the outer wall of the active plate, and the active plate forms an elastic connection with the inner wall of the active inner cavity through the return spring.

[0009] As a further optimization of this technical solution, a chute is provided at the top end of the rotating sleeve, and the two groups of positioning holes are both located in the chute.

[0010] As a further optimization of this technical solution, anti-slip patterns are provided on the outer wall of the pull handle.

[0011] As a further optimization of this technical solution, the outer walls of the bottom ends of the two groups of positioning insertion rods are polished.

[0012] The utility model provides a vacuum distillation device for preparing trimellitic acid trichloride, which has the following beneficial effects:

[0013] 1. By installing a rotatable rotating sleeve on the right side of the manufacturing table and placing sleeves for placing collection barrels on both sides of the rotating sleeve, the utility model can quickly release the connection between the cooling cylinder and the collection barrel through the telescopic sleeve head at the bottom end of the cooling cylinder. Subsequently, rotate the rotating sleeve outside the rotating shaft seat to drive the two groups of placing sleeves to rotate 180 degrees, so that the two groups of placing sleeves can quickly drive the two groups of collection barrels to exchange positions, facilitating the full collection barrel to quickly move away from below the telescopic sleeve head and enabling the empty collection barrel to accurately move below the telescopic sleeve head to complete the docking with the cooling cylinder. This shortens the time required for replacing the collection barrel, reduces the operation difficulty, and improves the convenience of using the device.

[0014] 2. The utility model installs a liftable movable plate at the top of the rotating shaft seat. When it is necessary to rotate the rotating sleeve, after the rotating sleeve drives the collection barrels in the two placement sleeves to exchange positions, the reset spring releases elastic force to push the movable plate to move downward along the movable inner cavity in the sleeve, so that the movable plate drives the two positioning insertion rods to quickly insert into the two positioning holes on the rotating sleeve, quickly forming a steering limit function for the rotating sleeve, effectively preventing the rotating sleeve from accidentally rotating under the influence of the outside during the filling process of the collection barrel, and improving the stability of the device during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 is a partial cross-sectional structural schematic diagram of the utility model;

[0017] Figure 3 is of the utility model Figure 1 enlarged structural schematic diagram at A;

[0018] Figure 4 is of the utility model Figure 2 enlarged structural schematic diagram at B.

[0019] In the figure: 1, manufacturing table; 2, raw material furnace; 3, distillation kettle; 4, diversion pipe; 5, cooling cylinder; 6, telescopic socket head; 7, booster pump; 8, collection barrel; 9, liquid inlet; 10, rotating shaft seat; 11, rotating sleeve; 12, connecting bracket; 13, placement sleeve; 14, sleeve; 15, movable inner cavity; 16, movable plate; 17, positioning insertion rod; 18, positioning hole; 19, connecting rod; 20, pull handle; 21, reset spring; 22, chute. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0021] The present utility model provides a technical solution: As Figures 1 to 4 shown, in this embodiment, a vacuum distillation device for the preparation of trimellitic acid chloride includes a manufacturing table 1, a raw material furnace 2 is installed on the left side of the manufacturing table 1, a distillation kettle 3 is arranged in the middle of the manufacturing table 1, a booster pump 7 is arranged between the raw material furnace 2 and the distillation kettle 3, the top of the distillation kettle 3 is connected to a cooling cylinder 5 through a diversion pipe 4, a telescopic socket head 6 is arranged at the bottom right of the cooling cylinder 5, a collection barrel 8 is arranged on the right side of the manufacturing table 1, a liquid inlet 9 is arranged on the collection barrel 8, a rotating shaft seat 10 is installed on the right side of the manufacturing table 1, a rotating sleeve 11 is rotatably connected to the rotating shaft seat 10, both outer walls of the rotating sleeve 11 are connected to a placement sleeve 13 through a connecting bracket 12, and a steering limit component is arranged at the top of the rotating sleeve 11.

[0022] By installing a rotatable sleeve 11 on the right side of the manufacturing table 1 and placing sleeves 13 for placing the collection buckets 8 on both sides of the sleeve 11, when it is necessary to replace the collection bucket 8, the connection between the cooling cylinder 5 and the collection bucket 8 can be quickly released by the telescopic sleeve head 6 at the bottom of the cooling cylinder 5. Subsequently, rotate the sleeve 11 outside the rotating shaft seat 10 to drive the two placing sleeves 13 to rotate 180 degrees, so that the two placing sleeves 13 can quickly drive the two collection buckets 8 to exchange positions, facilitating the full collection bucket 8 to quickly move away from below the telescopic sleeve head 6 and allowing the empty collection bucket 8 to accurately move below the telescopic sleeve head 6 to complete the docking with the cooling cylinder 5, shortening the time required for replacing the collection bucket 8, reducing the operation difficulty, and improving the convenience of the device during use.

[0023] In other embodiments, the steering limit component includes a sleeve 14, a movable inner cavity 15, a movable plate 16, a positioning plug 17, a positioning hole 18, a connecting rod 19, a pull handle 20, and a return spring 21. A sleeve 14 is fixed to the top of the rotating shaft seat 10. A movable inner cavity 15 is provided inside the sleeve 14. A movable plate 16 is arranged inside the movable inner cavity 15. Positioning plugs 17 are fixed to both sides of the bottom end of the movable plate 16. Two positioning holes 18 are provided at the top of the sleeve 11. The bottom ends of the two positioning plugs 17 can be inserted into the positioning holes 18. The outer wall of the top end of the movable plate 16 is connected to a pull handle 20 through a connecting rod 19. A return spring 21 is wound around the connecting rod 19.

[0024] By installing a liftable movable plate 16 on the top of the rotating shaft seat 10, when it is necessary to rotate the sleeve 11, first pull up the pull handle 20 to drive the movable plate 16 to slide upward along the movable inner cavity 15 inside the sleeve 14 by the connecting rod 19, and the return spring 21 is deformed and stores energy under the extrusion of the movable plate 16. When the two positioning plugs 17 are completely pulled out of the two positioning holes 18 under the drive of the movable plate 16, the rotational limit of the sleeve 11 can be released, and then the sleeve 11 can be rotated 180 degrees. After the sleeve 11 drives the collection buckets 8 in the two placing sleeves 13 to exchange positions, release the upward pulling force on the pull handle 20 to allow the return spring 21 to release its elastic force to push the movable plate 16 to move downward along the movable inner cavity 15 inside the sleeve 14, and the movable plate 16 drives the two positioning plugs 17 to quickly insert into the two positioning holes 18 on the sleeve 11, quickly forming a steering limit for the sleeve 11, effectively preventing the sleeve 11 from accidentally rotating under the influence of the outside during the filling process of the collection bucket 8, and improving the stability of the device during use.

[0025] In other embodiments, the outer wall of the movable plate 16 is fully attached to the inner wall of the movable inner cavity 15, and the movable plate 16 is slidably connected to the movable inner cavity 15.

[0026] With this design, when the movable plate 16 moves up and down along the inner wall of the movable inner cavity 15, it is possible to prevent the movable plate 16 from shaking greatly during the movement, thereby improving the stability of the device when in use.

[0027] In other embodiments, the two ends of the return spring 21 are respectively connected to the inner wall of the movable inner cavity 15 and the outer wall of the movable plate 16, and the movable plate 16 is elastically connected to the inner wall of the movable inner cavity 15 through the return spring 21;

[0028] With this design, the return spring 21 applies a continuous downward elastic force to the movable plate 16 , so that the movable plate 16 can drive the two groups of positioning rods 17 to quickly insert into the two groups of positioning holes 18 .

[0029] In other embodiments, a slide groove 22 is formed at the top of the rotating sleeve 11, and both sets of positioning holes 18 are located in the slide groove 22;

[0030] Through this design, when it is necessary to rotate the rotating sleeve 11, the upward pulling force on the pull handle 20 can be released, allowing the movable plate 16 to drive the two sets of positioning rods 17 to be inserted into the slide groove 22 on the rotating sleeve 11, and allowing the rotating sleeve 11 to drive the slide groove 22 to rotate along the bottom ends of the two sets of positioning rods 17. When the rotating sleeve 11 is rotated one hundred and eighty degrees, the positions of the two sets of positioning holes 18 in the slide groove 22 can be interchanged, allowing the two sets of positioning rods 17 to be inserted into the slide groove 22 again. In the process of rotating the rotating sleeve 11, there is no need to continuously pull the pull handle 20, thereby improving the convenience of using the device.

[0031] In other embodiments, the outer wall of the handle 20 is provided with anti-slip textures;

[0032] Through this design, when the handle 20 needs to be pulled, the friction between the handle 20 and the user's hand can be effectively increased, thereby preventing the handle 20 from accidentally falling out of the user's hand during the pulling process.

[0033] In other embodiments, the outer walls of the bottom ends of the two sets of positioning rods 17 are polished;

[0034] Through this design, when the two sets of positioning rods 17 move into the slide groove 22, the friction between the outer wall of the bottom end of the positioning rods 17 and the inner wall of the slide groove 22 can be effectively reduced, making it easier for the rotating sleeve 11 to drive the slide groove 22 to rotate along the bottom ends of the two sets of positioning rods 17.

[0035] The electrical components mentioned in this article are all connected to an external main controller and industrial power supply, and the main controller can be a conventional known device for control such as a computer.

[0036] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A vacuum distillation apparatus for preparing trimesoyl chloride, comprising a production platform (1), a raw material furnace (2) is installed on the left side of the production platform (1), and a distillation kettle (3) is arranged in the middle of the production platform (1), characterized in that: A booster pump (7) is provided between the raw material furnace (2) and the distillation kettle (3); the top of the distillation kettle (3) is connected to a cooling cylinder (5) via a guide tube (4); a telescopic sleeve (6) is provided at the bottom right of the cooling cylinder (5); a collecting bucket (8) is provided on the right side of the manufacturing platform (1); a liquid inlet (9) is provided on the collecting bucket (8); a rotating shaft seat (10) is installed on the right side of the manufacturing platform (1); a rotating sleeve (11) is rotatably connected to the rotating shaft seat (10); both outer walls of the rotating sleeve (11) are connected to a placement sleeve (13) via a connecting bracket (12); a steering limit assembly is provided at the top of the rotating sleeve (11).

2. A vacuum distillation apparatus for preparing trimesoyl chloride according to claim 1, characterized in that: The steering limit assembly comprises a sleeve (14), a movable inner cavity (15), a movable plate (16), a positioning rod (17), a positioning hole (18), a connecting rod (19), a handle (20), and a reset spring (21). The sleeve (14) is fixed on the top of the rotating shaft seat (10). The sleeve (14) is provided with a movable inner cavity (15). The movable plate (16) is arranged in the movable inner cavity (15). Positioning rods (17) are fixed on both sides of the bottom of the movable plate (16). Two groups of positioning holes (18) are provided on the top of the rotating sleeve (11). The bottom ends of the two groups of positioning rods (17) can be inserted into the positioning holes (18). The outer wall of the top of the movable plate (16) is connected to the handle (20) through a connecting rod (19). The outside of the connecting rod (19) is wound with a reset spring (21).

3. A vacuum distillation apparatus for preparing trimesoyl chloride according to claim 2, characterized in that: The outer wall of the movable plate (16) is fully fitted with the inner wall of the movable inner cavity (15), and the movable plate (16) and the movable inner cavity (15) are slidably connected.

4. A vacuum distillation apparatus for preparing trimesoyl chloride according to claim 2, characterized in that: The two ends of the return spring (21) are respectively connected to the inner wall of the movable inner cavity (15) and the outer wall of the movable plate (16); the movable plate (16) is elastically connected to the inner wall of the movable inner cavity (15) via the return spring (21).

5. A vacuum distillation apparatus for preparing trimesoyl chloride according to claim 2, characterized in that: A slide groove (22) is provided at the top of the rotating sleeve (11), and the two groups of positioning holes (18) are both located in the slide groove (22).

6. A vacuum distillation apparatus for preparing trimesoyl chloride according to claim 2, characterized in that: The outer wall of the handle (20) is provided with anti-slip patterns.

7. A vacuum distillation apparatus for preparing trimesoyl chloride according to claim 2, characterized in that: The outer walls of the bottom ends of the two groups of positioning rods (17) are polished.

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