A catalytic method and catalytic device for ethylene carbonate

Abstract

The present invention relates to the technical field of ethylene carbonate preparation, and discloses a catalytic method and catalytic equipment for ethylene carbonate, including a mounting plate and a support plate, wherein a sealing mechanism is provided at the bottom of the mounting plate, and the sealing mechanism includes a sealing cover; a holding device is provided at the bottom of the support plate, and the holding device includes a filter cartridge, a support cylinder is provided at the top of the inner wall of the filter cartridge, and a plurality of equally spaced partitions are provided between the support cylinder and the filter cartridge; a spiral rotating mechanism is provided on the support plate, and the spiral rotating mechanism includes a support column, and a spiral rod is movably connected through the support column. The present invention realizes the rotation of the filter cartridge during the ascending process through the cooperation of the spiral rod and the support column, thereby drying a large amount of water on the catalyst, and realizes timely sealing of the reaction vessel by automatically closing the sealing cover when the filter cartridge is taken out, thereby avoiding a significant reduction in the pressure in the reaction vessel.

Description

Technical Field

[0001] The invention belongs to the technical field of ethylene carbonate preparation, and in particular relates to a catalytic method and catalytic equipment for ethylene carbonate. Background Art

[0002] Ethylene carbonate is an important organic chemical widely used in plastics, coatings, fibers and other fields. Its production process mainly includes two steps: esterification reaction and dehydration reaction.

[0003] Esterification is the first step in the production of ethylene carbonate. The raw materials are ethylene glycol and carbon dioxide. In a reactor, ethylene glycol and carbon dioxide are added in a certain proportion, and a catalyst is added to carry out the esterification reaction. The catalyst is usually an organic tin compound, such as diethylstannic acid, etc. The reaction temperature is generally between 150-200 degrees Celsius, and the reaction time is 2-4 hours. After the reaction is completed, ethylene carbonate is obtained.

[0004] Dehydration reaction is the second step in the production of ethylene carbonate. Its raw materials are ethylene carbonate and ethylene. In a reactor, ethylene carbonate and ethylene are added in a certain proportion, and a catalyst is added to carry out a dehydration reaction. The catalyst is usually an oxide or carbonate of an alkali metal or alkaline earth metal, such as sodium hydroxide, potassium hydroxide, sodium carbonate, etc. The reaction temperature is generally between 100-150°C, and the reaction time is 2-4 hours. After the reaction is completed, ethylene carbonate is obtained.

[0005] During the preparation of ethylene carbonate, the reaction environment needs to maintain a high pressure. During the reaction, the material may contain impurities, which may react with the catalyst and reduce the catalytic effect of the catalyst. The catalyst needs to be replaced in time. When replacing the catalyst, the reaction vessel needs to be opened, which causes the pressure inside the reaction vessel to decrease, which is not conducive to the reaction. At the same time, a large amount of reagents will adhere to the catalyst when it is taken out, and it will drip onto the ground after being taken out, which is easy to cause pollution. Summary of the invention

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0007] A catalytic device for ethylene carbonate, comprising a mounting plate and a support plate, wherein a sealing mechanism is arranged at the bottom of the mounting plate, wherein the sealing mechanism comprises a sealing cover, wherein the sealing cover is provided with two symmetrically distributed sealing covers, and the tops of the two sealing covers are rotatably connected to the bottom of the mounting plate;

[0008] A holding device is provided at the bottom of the support plate, and the holding device includes a filter cartridge, the opening end of the filter cartridge faces downward, a support cylinder is installed on the top of the inner wall of the filter cartridge, and a plurality of partitions with equal spacing are installed between the support cylinder and the filter cartridge;

[0009] The support plate is provided with a spiral rotating mechanism, which includes a support column, the bottom of which is fixedly mounted on the top of the support plate, and a spiral rod is movably connected through the support column, and the spiral rod is adapted to the support column.

[0010] As a preferred embodiment of the present invention, the inner wall of the sealing cover is semicircular, a sealing barrel is installed at the bottom of the support plate, the outer diameter of the sealing barrel is adapted to the semicircular diameter of the inner wall of the sealing cover, the inner diameter of the sealing barrel is adapted to the outer diameter of the filter cartridge, a guide slope is arranged inside the sealing cover, fixed plates are installed on both sides of the sealing cover, and a first spring is installed between two fixed plates on opposite sides of the sealing cover.

[0011] As a preferred embodiment of the present invention, the side surface of the sealing cover is rotatably connected with a hook tooth, and a torsion spring is installed at the rotatable connection between the hook tooth and the sealing cover.

[0012] As a preferred embodiment of the present invention, a first groove is opened on both sides of the mounting plate, a connecting plate is slidably connected to the first groove, a baffle rod is installed at the bottom of the connecting plate, the baffle rod and the hook teeth are adapted to each other, two sealing plates are installed on the connecting plate, and the two sealing plates are respectively located at the top and bottom of the mounting plate, the length and width of the sealing plate are both greater than the length and width of the first groove, a baffle is installed on the top of the sealing plate located above the mounting plate, second fixing blocks are installed on both sides of the top of the mounting plate, a rubber band is installed at one end of the second fixing block, and the other end of the rubber band is installed at one end of the top sealing plate.

[0013] As a preferred embodiment of the present invention, two first fixed blocks are installed on both sides of the support plate, a sliding rod is installed between the two first fixed blocks on each side, a shift rod is movably sleeved on the sliding rod, a second spring is movably sleeved on the sliding rod, and two ends of the second spring are respectively fixedly mounted on one end of the shift rod and one end of the first fixed block.

[0014] As a preferred embodiment of the present invention, the lever is rotatably connected to a pull rod at one end close to the center of the support plate, and a pull ring is rotatably connected between the pull rods on both sides, and four equally spaced top rods are installed at the bottom of the pull ring, and the bottom of the top rod movably passes through the support plate and extends to the bottom of the support plate, and a top ring is installed at the bottom of the four top rods, and the outer diameter of the top ring is adapted to the inner diameter of the sealing barrel.

[0015] As a preferred embodiment of the present invention, a telescopic rod is rotatably connected on both sides of the two sealing covers, a pressure plate is installed on one side of the telescopic rod, two support shafts are installed on the top of one end of the pressure plate, the top of the support shaft movably passes through the mounting plate and extends to the top, a push rod is fixedly installed between the tops of the two support shafts, buckle rods are rotatably connected on both sides of the top of the mounting plate, the top of the buckle rod is adapted to the support plate, a through second groove is opened on the side of the buckle rod, and the push rod movably passes through the inside of the second groove.

[0016] As a preferred embodiment of the present invention, two plug rods are installed on both sides of the bottom of the mounting plate, a limit rod is movably sleeved between the plug rods on both sides, a limit groove is provided on the side of the limit rod, short shafts are installed on both sides of the sealing cover, the cross-sectional diameter of the short shaft is adapted to the width of the limit groove, and the short shaft is movably connected inside the limit groove.

[0017] As a preferred embodiment of the present invention, a cover plate is provided at the open end of the filter cartridge, a slot is provided on the side of the cover plate, a buckle ring is installed on the bottom side of the filter cartridge, and the buckle ring is matched with the slot.

[0018] The present invention also discloses a catalytic method for a catalytic device for ethylene carbonate, and the steps of the catalytic method for a catalytic device for ethylene carbonate are as follows:

[0019] S1. During installation, turn the cover to unlock the buckle and the slot, then open the cover and add the catalyst inside the filter cartridge. After closing the cover, hold the handle and put the device into the installation plate. At this time, the support plate and the sealing barrel seal the installation plate.

[0020] S2. Continue to push the handle to drive the spiral rod down, and the spiral rod drives the filter cartridge down. The filter cartridge opens the sealing cover to both sides through the guide slope, so that the filter cartridge can smoothly reach the bottom of the container;

[0021] S3, when the sealing cover opens to both sides, the hook teeth are driven to move, and the hook teeth are pressed against the blocking rod while moving, and rotate under the reaction force of the blocking rod. When the blocking rod and the hook teeth are staggered, the torsion force of the torsion spring drives the hook teeth to reset and lock the blocking rod, so that the sealing cover remains in the open state;

[0022] S4, the process of opening the sealing cover drives the short shaft to move, and the short shaft drives the limit rod to slide on the insertion rod through the limit groove. Since the short shafts on both sides are movably connected to the same limit rod, the movement state of the short shafts is consistent, so that the sealing covers on both sides move synchronously;

[0023] S5, when the sealing cover is opened, both ends of the telescopic rod are synchronously lowered, thereby driving the telescopic rod to lower, and the telescopic rod drives the push rod to lower through the pressure plate and the support shaft, and the push rod is lowered and drives the buckle rod to rotate through the second groove, thereby locking the support plate;

[0024] S6. When the catalyst needs to be replaced, the handle is pulled, and the handle drives the filter cartridge to rise through the spiral rod. At the same time, the cooperation between the spiral rod and the support column makes the spiral rod rotate during the rising process, and drives the filter cartridge to rotate, so as to dry the liquid in the catalyst to a certain extent;

[0025] S7. When the filter cartridge moves to the top, the filter cartridge presses against the top ring, the top ring rises and drives the pull ring to rise through the top rod, the pull ring drives the lever to move horizontally through the pull rod, thereby pressing against the baffle plate, the baffle plate moves and drives the baffle rod to move through the connecting plate, so that the baffle rod is separated from the hook teeth, and at this time, the tension of the first spring pulls the two sealing covers, thereby realizing the closing of the two sealing covers;

[0026] S8. During the closing process of the sealing cover, the telescopic rod is raised, and the telescopic rod drives the push rod to rise through the pressure plate and the support shaft, and lifts the buckle rod to rotate it, so as to unlock the support plate and the mounting plate, and replace the catalyst by opening the cover plate;

[0027] S9. After the device is taken out, the tension of the rubber band drives the sealing plate and the connecting plate to reset, thereby realizing the reset of the blocking rod, pushing the handle to move the filter cartridge a certain distance, so that the second spring can drive the lever to reset.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention realizes the rotation of the filter cartridge during the ascending process by the cooperation of the spiral rod and the support column, thereby drying a large amount of moisture on the catalyst, and automatically closing the sealing cover when the filter cartridge is taken out to achieve timely sealing of the reaction container and avoid a significant reduction in the pressure in the reaction container.

[0030] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In the attached picture:

[0032] Figure 1 It is a schematic diagram of the structure of the present invention;

[0033] Figure 2 It is a structural schematic diagram of the filter cartridge of the present invention;

[0034] Figure 3 This is a schematic diagram of the top structure of the mounting plate of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of the top ring of the present invention;

[0036] Figure 5 This is a schematic diagram of the structure of the first spring of the present invention;

[0037] Figure 6 This is a schematic diagram of the structure of the first groove of the present invention;

[0038] Figure 7 This is a schematic diagram of the buckle rod structure of the present invention;

[0039] Figure 8 It is a schematic diagram of the structure of the hook teeth of the present invention;

[0040] Fig. 9 It is a schematic diagram of the structure of the limit rod of the present invention;

[0041] Fig.10 It is a schematic diagram of the structure of the guiding inclined surface of the present invention.

[0042] In the figure:

[0043] 100, mounting plate; 101, sealing cover; 102, guide slope; 103, fixing plate; 104, first spring;

[0044] 200, support plate; 201, support column; 202, spiral rod; 203, filter cartridge; 204, partition plate; 205, support cartridge; 206, buckle ring; 207, cover plate; 208, slot; 209, sealing barrel;

[0045] 300, top ring; 301, top rod; 302, pull ring; 303, pull rod; 304, lever; 305, slide rod; 306, second spring; 307, first fixing block;

[0046] 400, first groove; 401, connecting plate; 402, sealing plate; 403, baffle plate; 404, rubber band; 405, second fixing block; 406, baffle rod; 407, hook tooth; 408, torsion spring;

[0047] 500, telescopic rod; 501, pressing plate; 502, supporting shaft; 503, pushing rod; 504, buckle rod; 505, second groove;

[0048] 600, short shaft; 601, limiting rod; 602, limiting groove; 603, insert rod. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0050] Embodiment 1:

[0051] like Figures 1 to 10 As shown, a catalytic device for ethylene carbonate comprises a mounting plate 100 and a support plate 200. A sealing mechanism is provided at the bottom of the mounting plate 100. The sealing mechanism comprises a sealing cover 101. The sealing cover 101 is provided with two symmetrically distributed ones, and the tops of the two sealing covers 101 are rotatably connected to the bottom of the mounting plate 100.

[0052] A holding device is provided at the bottom of the support plate 200, and the holding device includes a filter cartridge 203, the opening end of the filter cartridge 203 faces downward, a support cartridge 205 is installed on the top of the inner wall of the filter cartridge 203, and a plurality of equally spaced partitions 204 are installed between the support cartridge 205 and the filter cartridge 203;

[0053] A spiral rotating mechanism is provided on the support plate 200 , and the spiral rotating mechanism includes a support column 201 , the bottom of the support column 201 is fixedly installed on the top of the support plate 200 , and a spiral rod 202 is movably connected through the support column 201 , and the spiral rod 202 is adapted to the support column 201 .

[0054] like Figures 1 to 10 As shown, in a specific embodiment, the inner wall of the sealing cover 101 is semicircular, a sealing barrel 209 is installed at the bottom of the support plate 200, the outer diameter of the sealing barrel 209 is adapted to the semicircular diameter of the inner wall of the sealing cover 101, the inner diameter of the sealing barrel 209 is adapted to the outer diameter of the filter cartridge 203, a guide slope 102 is arranged inside the sealing cover 101, fixing plates 103 are installed on both sides of the sealing cover 101, a first spring 104 is installed between the two fixing plates 103 on the opposite sides of the two sealing covers 101, a hook tooth 407 is rotatably connected to the side of the sealing cover 101, and a torsion spring 408 is installed at the rotatable connection between the hook tooth 407 and the sealing cover 101. In this arrangement, the filter cartridge 203 opens the sealing cover 101 to both sides through the guiding slope 102, so that the filter cartridge 203 can smoothly reach the bottom of the container. When the sealing cover 101 opens to both sides, it drives the hook teeth 407 to move. While moving, the hook teeth 407 resist the blocking rod 406 and rotate under the reaction force of the blocking rod 406. When the blocking rod 406 and the hook teeth 407 are offset, the torsion force of the torsion spring 408 drives the hook teeth 407 to reset and lock the blocking rod 406, so that the sealing cover 101 remains in an open state.

[0055] like Figures 1 to 10As shown, further, first grooves 400 are opened on both sides of the mounting plate 100, and a connecting plate 401 is slidably connected to the first groove 400, and a baffle 406 is installed at the bottom of the connecting plate 401, and the baffle 406 and the hook tooth 407 are adapted to each other, and two sealing plates 402 are installed on the connecting plate 401, and the two sealing plates 402 are respectively located at the top and bottom of the mounting plate 100, and the length and width of the sealing plate 402 are both greater than the length and width of the first groove 400, and a baffle 403 is installed on the top of the sealing plate 402 located above the mounting plate 100, and second fixing blocks 405 are installed on both sides of the top of the mounting plate 100, and a rubber band 404 is installed at one end of the second fixing block 405, and the other end of the rubber band 404 is installed at one end of the top sealing plate 402. In this configuration, the baffle plate 403 moves and drives the baffle rod 406 to move through the connecting plate 401, thereby disengaging the baffle rod 406 from the hook teeth 407, and the rubber band 404 is used to drive the sealing plate 402 and the connecting plate 401 to reset.

[0056] Embodiment 2:

[0057] like Figures 1 to 10 As shown, in a specific embodiment, two first fixing blocks 307 are installed on both sides of the support plate 200, a slide bar 305 is installed between the two first fixing blocks 307 on each side, a lever 304 is movably sleeved on the slide bar 305, a second spring 306 is movably sleeved on the slide bar 305, and two ends of the second spring 306 are respectively fixedly installed on one end of the lever 304 and one end of the first fixing block 307. In this configuration, the second spring 306 can drive the lever 304 to reset.

[0058] like Figures 1 to 10 As shown, further, the lever 304 is rotatably connected to a pull rod 303 at one end near the center of the support plate 200, and a pull ring 302 is rotatably connected between the pull rods 303 on both sides, and four equally spaced top rods 301 are installed at the bottom of the pull ring 302, and the bottom of the top rod 301 movably penetrates the support plate 200 and extends to the bottom of the support plate 200, and a top ring 300 is installed at the bottom of the four top rods 301, and the outer diameter of the top ring 300 is adapted to the inner diameter of the sealing barrel 209. In this setting, when the filter cartridge 203 moves to the top, the filter cartridge 203 abuts against the top ring 300, the top ring 300 rises and drives the pull ring 302 to rise through the top rod 301, and the pull ring 302 drives the lever 304 to move horizontally through the pull rod 303, thereby abutting against the baffle 403.

[0059] like Figures 1 to 10As shown, further, a telescopic rod 500 is rotatably connected to both sides of the two sealing covers 101, a pressure plate 501 is installed on one side of the telescopic rod 500, and two support shafts 502 are installed on the top of one end of the pressure plate 501. The top of the support shaft 502 movably passes through the mounting plate 100 and extends to the top, and a push rod 503 is fixedly installed between the tops of the two support shafts 502. Buckle rods 504 are rotatably connected to both sides of the top of the mounting plate 100, and the top of the buckle rod 504 is adapted to the support plate 200. A through second groove 505 is opened on the side of the buckle rod 504, and the push rod 503 movably passes through the inside of the second groove 505. In this arrangement, when the sealing cover 101 is opened, both ends of the telescopic rod 500 are synchronously lowered, thereby driving the telescopic rod 500 to descend, and the telescopic rod 500 drives the push rod 503 to descend through the pressure plate 501 and the support shaft 502, and the push rod 503 descends and drives the buckle rod 504 to rotate through the second groove 505, thereby locking the support plate 200. During the closing process of the sealing cover 101, the telescopic rod 500 is raised, and the telescopic rod 500 drives the push rod 503 to rise through the pressure plate 501 and the support shaft 502, and lifts up the buckle rod 504 to rotate it, thereby unlocking the support plate 200 and the mounting plate 100.

[0060] Embodiment three:

[0061] like Figures 1 to 10 As shown, in a specific embodiment, two plug rods 603 are installed on both sides of the bottom of the mounting plate 100, and a limit rod 601 is movably sleeved between the plug rods 603 on both sides, and a limit slot 602 is provided on the side of the limit rod 601. Short shafts 600 are installed on both sides of the sealing cover 101, and the cross-sectional diameter of the short shaft 600 is adapted to the width of the limit slot 602. The short shaft 600 is movably connected inside the limit slot 602. In this setting, the process of opening the sealing cover 101 drives the short shaft 600 to move, and the short shaft 600 drives the limit rod 601 to slide on the plug rod 603 through the limit slot 602. Since the short shafts 600 on both sides are movably connected to the same limit rod 601, the movement state of the short shaft 600 is consistent, so that the sealing covers 101 on both sides move synchronously.

[0062] like Figures 1 to 10 As shown, further, a cover plate 207 is provided at the open end of the filter cartridge 203, a slot 208 is provided on the side of the cover plate 207, and a buckle ring 206 is installed on the bottom side of the filter cartridge 203, and the buckle ring 206 is adapted to the slot 208. In this configuration, the cover plate 207 is rotated to unlock the buckle ring 206 and the slot 208, and at this time, the cover plate 207 is opened and the catalyst is added inside the filter cartridge 203.

[0063] The implementation principle of a catalytic device for ethylene carbonate in this embodiment is as follows: when installing, rotate the cover plate 207 to unlock the buckle ring 206 and the slot 208, then open the cover plate 207 and add the catalyst inside the filter cartridge 203, close the cover plate 207 and hold the handle to put the device into the mounting plate 100, at this time, the support plate 200 and the sealing barrel 209 seal the mounting plate 100, continue to push the handle to drive the spiral rod 202 to descend, the spiral rod 202 drives the filter cartridge 203 to descend, the filter cartridge 203 opens the sealing cover 101 to both sides through the guide slope 102, so that the filter cartridge 203 can smoothly reach the bottom of the container, and the sealing cover 101 opens to both sides, driving the hook teeth 407 to move, and the hook teeth 407 move while resisting the blocking rod 406, and rotate under the reaction force of the blocking rod 406. When the blocking rod 40 6 is staggered with the hook teeth 407, the torsion force of the torsion spring 408 drives the hook teeth 407 to reset and lock the blocking rod 406, so that the sealing cover 101 remains in the open state. The process of opening the sealing cover 101 drives the short shaft 600 to move, and the short shaft 600 drives the limiting rod 601 to slide on the insertion rod 603 through the limiting groove 602. Since the short shafts 600 on both sides are movably connected to the same limiting rod 601, the movement state of the short shaft 600 is consistent, so that the sealing covers 101 on both sides move synchronously. When the sealing cover 101 is opened, the two ends of the telescopic rod 500 are synchronously lowered, thereby driving the telescopic rod 500 to lower. The telescopic rod 500 drives the push rod 503 to lower through the pressing plate 501 and the support shaft 502. The push rod 503 drops and drives the buckle rod 504 to rotate through the second groove 505, thereby locking the support plate 200.

[0064] When the catalyst needs to be replaced, the handle is pulled, and the handle drives the filter cartridge 203 to rise through the spiral rod 202. At the same time, the cooperation between the spiral rod 202 and the support column 201 makes the spiral rod 202 rotate during the rising process, and drives the filter cartridge 203 to rotate, so that the liquid in the catalyst is dried to a certain extent. When the filter cartridge 203 moves to the top, the filter cartridge 203 abuts against the top ring 300, the top ring 300 rises and drives the pull ring 302 to rise through the top rod 301, and the pull ring 302 drives the lever 304 to move horizontally through the pull rod 303, thereby abutting against the baffle plate 403, the baffle plate 403 moves and drives the baffle rod 406 to move through the connecting plate 401, so that the baffle rod 406 and the hook teeth 404 are connected. 07 is disengaged, at which time the tension of the first spring 104 pulls the two sealing covers 101, thereby achieving the closure of the two sealing covers 101. During the closing process of the sealing covers 101, the telescopic rod 500 rises, and the telescopic rod 500 drives the push rod 503 to rise through the pressure plate 501 and the support shaft 502, and lifts the buckle rod 504 to rotate it, thereby achieving the unlocking of the support plate 200 and the mounting plate 100, and the catalyst is replaced by opening the cover plate 207. After the device is taken out, the tension of the rubber band 404 drives the sealing plate 402 and the connecting plate 401 to reset, thereby achieving the reset of the blocking rod 406, and pushing the handle to move the filter cartridge 203 for a distance, so that the second spring 306 can drive the lever 304 to reset.

Claims

1. A catalytic device for ethylene carbonate, comprising a mounting plate (100) and a support plate (200), characterized in that: A sealing mechanism is provided at the bottom of the mounting plate (100), the sealing mechanism comprising a sealing cover (101), the sealing cover (101) being provided with two symmetrically distributed ones, and the tops of the two sealing covers (101) are rotatably connected to the bottom of the mounting plate (100); A containing device is provided at the bottom of the support plate (200), the containing device comprising a filter cartridge (203), the open end of the filter cartridge (203) facing downwards, a supporting cylinder (205) is installed at the top of the inner wall of the filter cartridge (203), and a plurality of partitions (204) distributed at equal intervals are installed between the supporting cylinder (205) and the filter cartridge (203); The support plate (200) is provided with a spiral rotating mechanism, the spiral rotating mechanism comprising a support column (201), the bottom of the support column (201) is fixedly mounted on the top of the support plate (200), a spiral rod (202) is movably connected through the support column (201), and the spiral rod (202) and the support column (201) are mutually adapted; The inner wall of the sealing cover (101) is semicircular, a sealing barrel (209) is installed at the bottom of the support plate (200), the outer diameter of the sealing barrel (209) is matched with the semicircular diameter of the inner wall of the sealing cover (101), the inner diameter of the sealing barrel (209) is matched with the outer diameter of the filter cartridge (203), a guiding inclined surface (102) is arranged inside the sealing cover (101), fixing plates (103) are installed on both sides of the sealing cover (101), and a first spring (104) is installed between two fixing plates (103) on opposite sides of the two sealing covers (101); A hook tooth (407) is rotatably connected to the side of the sealing cover (101), and a torsion spring (408) is installed at the rotatable connection between the hook tooth (407) and the sealing cover (101); First grooves (400) are provided on both sides of the mounting plate (100), a connecting plate (401) is slidably connected to the first groove (400), a blocking rod (406) is installed at the bottom of the connecting plate (401), the blocking rod (406) and the hook teeth (407) are adapted to each other, two sealing plates (402) are installed on the connecting plate (401), and the two sealing plates (402) are respectively located at the top and bottom of the mounting plate (100), the length and width of the sealing plates (402) are greater than the length and width of the first groove (400), a blocking plate (403) is installed at the top of the sealing plate (402) located above the mounting plate (100), second fixing blocks (405) are installed on both sides of the top of the mounting plate (100), a rubber band (404) is installed at one end of the second fixing block (405), and the other end of the rubber band (404) is installed at one end of the sealing plate (402) at the top; During installation, the spiral rod (202) drives the filter cartridge (203) to descend, and the filter cartridge (203) causes the sealing cover (101) to open to both sides via the guide inclined surface (102). When the sealing cover (101) opens to both sides, the hook teeth (407) are driven to move. While the hook teeth (407) move, they abut against the stop rod (406) and rotate under the reaction force of the stop rod (406). When the stop rod (406) and the hook teeth (407) are offset, the torsion force of the torsion spring (408) drives the hook teeth (407) to reset and lock the stop rod (406), thereby keeping the sealing cover (101) in an open state. Two first fixed blocks (307) are installed on both sides of the support plate (200), a sliding rod (305) is installed between the two first fixed blocks (307) on each side, a shifting rod (304) is movably sleeved on the sliding rod (305), a second spring (306) is movably sleeved on the sliding rod (305), and two ends of the second spring (306) are respectively fixedly installed on one end of the shifting rod (304) and one end of the first fixed block (307); The lever (304) is rotatably connected to a pull rod (303) at one end near the center of the support plate (200), and a pull ring (302) is rotatably connected between the pull rods (303) on both sides, and four equally spaced top rods (301) are installed at the bottom of the pull ring (302), and the bottom of the top rod (301) movably passes through the support plate (200) and extends to the bottom of the support plate (200), and a top ring (300) is installed at the bottom of the four top rods (301), and the outer diameter of the top ring (300) is adapted to the inner diameter of the sealing barrel (209); A telescopic rod (500) is rotatably connected to both sides of the two sealing covers (101), a pressure plate (501) is installed on one side of the telescopic rod (500), two support shafts (502) are installed on the top of one end of the pressure plate (501), the top of the support shaft (502) movably passes through the mounting plate (100) and extends to the top, a push rod (503) is fixedly installed between the tops of the two support shafts (502), buckle rods (504) are rotatably connected to both sides of the top of the mounting plate (100), the top of the buckle rod (504) is adapted to the support plate (200), a through second groove (505) is opened on the side of the buckle rod (504), and the push rod (503) movably passes through the inside of the second groove (505); When the sealing cover (101) is opened, both ends of the telescopic rod (500) are synchronously lowered, the telescopic rod (500) drives the push rod (503) to lower through the pressing plate (501) and the support shaft (502), the push rod (503) lowers and drives the buckle rod (504) to rotate through the second groove (505), thereby locking the support plate (200); The handle drives the filter cartridge (203) to rise via the spiral rod (202), and the spiral rod (202) cooperates with the support column (201) so that the spiral rod (202) rotates during the rising process, and drives the filter cartridge (203) to rotate. When the filter cartridge (203) moves to the top, the filter cartridge (203) abuts against the top ring (300), the top ring (300) rises and drives the pull ring (302) to rise via the top rod (301), the pull ring (302) drives the lever (304) to move horizontally via the pull rod (303), abuts against the baffle plate (403), the baffle plate (403) moves and passes through the connecting plate (4 01) drives the blocking rod (406) to move, so that the blocking rod (406) is disengaged from the hook tooth (407). At this time, the pulling force of the first spring (104) pulls the two sealing covers (101) to achieve the closure of the two sealing covers (101). During the closing process of the sealing covers (101), the telescopic rod (500) rises. The telescopic rod (500) drives the push rod (503) to rise through the pressure plate (501) and the support shaft (502), and lifts the buckle rod (504) to rotate it, thereby unlocking the support plate (200) and the mounting plate (100), and replacing the catalyst is achieved by opening the cover plate (207).

2. A catalytic device for ethylene carbonate according to claim 1, characterized in that: Two insertion rods (603) are installed on both sides of the bottom of the installation plate (100), and a limiting rod (601) is movably sleeved between the insertion rods (603) on both sides, and a limiting groove (602) is provided on the side of the limiting rod (601). Short shafts (600) are installed on both sides of the sealing cover (101), and the cross-sectional diameter of the short shaft (600) is adapted to the width of the limiting groove (602), and the short shaft (600) is movably connected inside the limiting groove (602).

3. A catalytic device for ethylene carbonate according to claim 1, characterized in that: The open end of the filter cartridge (203) is provided with a cover plate (207), a side surface of the cover plate (207) is provided with a slot (208), and a buckle ring (206) is installed on the bottom side surface of the filter cartridge (203), and the buckle ring (206) is adapted to fit the slot (208).

4. A catalytic method for ethylene carbonate, characterized in that: Utilizing the catalytic device for ethylene carbonate as claimed in any one of claims 1 to 3, the steps of the catalytic method of the catalytic device for ethylene carbonate are as follows: S1. During installation, the cover plate (207) is rotated to unlock the buckle ring (206) and the card slot (208). At this time, the cover plate (207) is opened and a catalyst is added into the filter cartridge (203). After closing the cover plate (207), the device is placed on the mounting plate (100) by holding the handle. At this time, the support plate (200) and the sealing barrel (209) seal the mounting plate (100); S2. Continue to push the handle to drive the spiral rod (202) to descend, and the spiral rod (202) drives the filter cartridge (203) to descend. The filter cartridge (203) causes the sealing cover (101) to open to both sides through the guide inclined surface (102), so that the filter cartridge (203) can smoothly reach the bottom of the container; S3, when the sealing cover (101) opens to both sides, the hook teeth (407) are driven to move, and the hook teeth (407) are pressed against the blocking rod (406) while moving, and rotate under the reaction force of the blocking rod (406), and when the blocking rod (406) and the hook teeth (407) are offset, the torsion force of the torsion spring (408) drives the hook teeth (407) to reset and lock the blocking rod (406), so that the sealing cover (101) remains in the open state; S4, the process of opening the sealing cover (101) causes the short shaft (600) to move, and the short shaft (600) drives the limiting rod (601) to slide on the insertion rod (603) through the limiting groove (602). Since the short shafts (600) on both sides are movably connected to the same limiting rod (601), the movement state of the short shaft (600) is consistent, so that the sealing covers (101) on both sides move synchronously; S5, when the sealing cover (101) is opened, both ends of the telescopic rod (500) are synchronously lowered, thereby driving the telescopic rod (500) to lower, and the telescopic rod (500) drives the push rod (503) to lower through the pressing plate (501) and the support shaft (502), and the push rod (503) is lowered and drives the buckle rod (504) to rotate through the second groove (505), thereby locking the support plate (200); S6. When the catalyst needs to be replaced, the handle is pulled, and the handle drives the filter cartridge (203) to rise via the spiral rod (202). At the same time, the spiral rod (202) cooperates with the support column (201) so that the spiral rod (202) rotates during the rising process, and drives the filter cartridge (203) to rotate, thereby drying the liquid in the catalyst to a certain extent; S7. When the filter cartridge (203) moves to the top, the filter cartridge (203) abuts against the top ring (300), the top ring (300) rises and drives the pull ring (302) to rise through the top rod (301), the pull ring (302) drives the lever (304) to move horizontally through the pull rod (303), thereby abutting against the baffle plate (403), the baffle plate (403) moves and drives the baffle rod (406) to move through the connecting plate (401), thereby disengaging the baffle rod (406) from the hook tooth (407), and at this time, the pulling force of the first spring (104) pulls the two sealing covers (101), thereby achieving the closure of the two sealing covers (101); S8, when the sealing cover (101) is closed, the telescopic rod (500) is raised, and the telescopic rod (500) drives the push rod (503) to rise through the pressing plate (501) and the supporting shaft (502), and lifts the buckle rod (504) to rotate, thereby unlocking the supporting plate (200) and the mounting plate (100), and replacing the catalyst by opening the cover plate (207); S9. After the device is taken out, the pulling force of the rubber band (404) drives the sealing plate (402) and the connecting plate (401) to reset, thereby achieving the reset of the blocking rod (406), pushing the handle to move the filter cartridge (203) a certain distance, so that the second spring (306) can drive the lever (304) to reset.

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