A purification method and intelligent purification device for tert-butyl isocyanate

Abstract

The present invention relates to the technical field of isocyanate purification, and in particular to a purification method and intelligent purification device for tert-butyl isocyanate, comprising an intelligent fixed frame, a water bath, a loading assembly, a condensing assembly, a feed valve, a glass tube and a block; the intelligent fixed frame is provided with a water bath for heating tert-butyl isocyanate; the intelligent fixed frame is provided with a loading assembly for loading tert-butyl isocyanate; the intelligent fixed frame is provided with a condensing assembly for condensing and evaporating liquid; the condensing assembly is connected with a feed valve; the feed valve is connected with a glass tube for transmitting tert-butyl isocyanate; and a block for blocking the reflux of condensed liquid is provided on the outside of the glass tube. The present invention realizes that the condensed liquid on the glass tube is blocked by the block, and the condensed liquid is prevented from flowing back into the rotating bottle along the outside of the glass tube, so as to avoid reducing the collection effect of the purified tert-butyl isocyanate, and improve the purification efficiency of tert-butyl isocyanate.

Description

Technical Field

[0001] The present invention relates to the technical field of isocyanate purification, and in particular to a purification method and an intelligent purification device for tert-butyl isocyanate. Background Art

[0002] Tert-butyl isocyanate is an organic compound belonging to the isocyanate class of compounds. In order to effectively remove other solvents in tert-butyl isocyanate under relatively mild conditions and minimize the thermal sensitivity and potential side reactions of chemicals such as tert-butyl isocyanate, a rotary evaporator is required to purify tert-butyl isocyanate.

[0003] Since tert-butyl isocyanate is chemically unstable, when a rotary evaporator is used to purify it, the feeding pipe of the feed valve needs to be in an inclined state to pass through the interior of the condenser and extend into the rotary bottle. When tert-butyl isocyanate is purified, the volatilized tert-butyl isocyanate vapor is easy to condense on the feeding pipe. At the same time, the condensed tert-butyl isocyanate drips on the pipe while flowing downward along the inner wall of the condenser, causing the condensed and purified tert-butyl isocyanate to flow back into the rotary bottle along the feeding pipe, resulting in a reduced collection effect of the purified tert-butyl isocyanate and a reduced purification rate of the tert-butyl isocyanate. Summary of the invention

[0004] In order to overcome the disadvantage that when the existing rotary evaporator is used, tert-butyl isocyanate after condensation and purification is easy to flow back into the rotary bottle along the feeding tube, resulting in reduced collection effect of the purified tert-butyl isocyanate and reduced purification rate of the tert-butyl isocyanate, the present invention provides a purification method and an intelligent purification device for tert-butyl isocyanate.

[0005] The technical solution is: an intelligent purification device for tert-butyl isocyanate, including an intelligent fixing frame and a water bath; the intelligent fixing frame is provided with a water bath for heating tert-butyl isocyanate; it also includes a loading component, a condensing component, a feed valve, a glass tube and a baffle; the intelligent fixing frame is provided with a loading component for loading tert-butyl isocyanate; the intelligent fixing frame is provided with a condensing component for condensing and evaporating liquid; the condensing component is connected to the feed valve; the feed valve is connected to a glass tube for transmitting tert-butyl isocyanate; a baffle for blocking the reflux of condensed liquid is provided on the outside of the glass tube.

[0006] As a preferred technical solution of the present invention, the loading assembly includes a rotating shaft, a rotating bottle, a DD motor, a gear and a gear ring; the rotating shaft is rotatably connected to the intelligent fixing frame; the glass tube runs through the middle of the rotating shaft; the rotating shaft is connected to a rotating bottle for loading tert-butyl isocyanate; the DD motor is fixedly connected to the intelligent fixing frame; the gear is fixedly connected to the output end of the DD motor; the gear ring is fixedly connected to the outer side of the rotating shaft; the gear and the gear ring are meshed.

[0007] As a preferred technical solution of the present invention, the condensation component includes a condenser, a serpentine condenser, a collecting bottle and a guide ring; the condenser is connected to the intelligent fixing frame; the condenser is provided with a pipe insertion port; the feed valve is connected to the pipe insertion port; the condenser is provided with a connecting port; the connecting port is connected to the intelligent fixing frame; the condenser is provided with a suction port; the suction port is connected to an external vacuum pump; a serpentine condenser for condensing evaporated gas is fixedly connected inside the condenser; a collecting bottle for collecting condensate is connected to the lower side of the condenser; a guide ring for guiding the condensed liquid is fixedly connected to the lower inner side of the condenser; the guide ring is located on the upper side of the connecting port.

[0008] As a preferred technical solution of the present invention, the stopper is configured to be in the shape of a flying saucer.

[0009] As a preferred technical solution of the present invention, it also includes a spiral plate; a spiral plate for improving the recovery efficiency of condensed liquid is fixedly connected to the serpentine condenser tube; each circle layer on the spiral plate is located between two adjacent circles on the serpentine condenser tube.

[0010] As a preferred technical solution of the present invention, it also includes a driving unit, an outer scraper and an inner scraper; the condenser is composed of a top cover and a tank body; a reinforcement buckle is connected between the top cover and the tank body; the driving unit is connected to the reinforcement buckle; a number of outer scrapers are connected to the driving unit; the outer side of each outer scraper is in contact with the inner wall of the condenser; each outer scraper is in contact with the outer side of the serpentine condenser tube and the spiral plate; an inner scraper is fixed to each outer scraper; each inner scraper is in contact with the inner side of the serpentine condenser tube and the spiral plate; the outer scraper and the inner scraper are made of soft rubber on the side that contacts the serpentine condenser tube.

[0011] As a preferred technical solution of the present invention, the drive unit includes a fixing seat and a servo motor; the fixing seat is connected to the reinforcement buckle; the servo motor is fixedly connected to the fixing seat; and each outer scraper strip is fixedly connected to the output end of the servo motor.

[0012] As a preferred technical solution of the present invention, each outer scraper strip has an outer inclined portion at the bottom; each inner scraper strip has an inner inclined portion at the bottom; each outer inclined portion and the corresponding inner inclined portion form an eight-shaped shape.

[0013] As a preferred technical solution of the present invention, a sealing ring layer is provided at the connection between the top cover and the tank body.

[0014] A method for purifying tert-butyl isocyanate comprises the following steps:

[0015] S1: Assemble, install the condenser on the intelligent fixing frame, and then insert the feed valve and glass tube into the condenser;

[0016] S2: Purification by evaporation, the tert-butyl isocyanate in the rotating bottle is heated by hot water in a water bath, so that it evaporates and enters the condenser;

[0017] S3: Condensation and collection: cooling the condenser through a serpentine condenser tube to condense the tert-butyl isocyanate vapor and flow it into a collection bottle for collection;

[0018] S4: Anti-backflow, the condensed liquid flowing back on the glass tube is blocked by a block to prevent the condensed liquid from flowing back along the outer side of the glass tube into the rotating bottle;

[0019] S5: Accelerate recovery. The servo motor drives the outer scraper and the inner scraper to scrape and gather the condensed liquid on the inner wall of the condenser, the serpentine condenser tube and the spiral plate, thereby accelerating the recovery rate of the condensed liquid.

[0020] Beneficial effects: The present invention achieves the blocking of the condensed liquid on the glass tube by the block, preventing the condensed liquid from flowing back into the rotating bottle along the outer side of the glass tube, avoiding the reduction of the collection effect of the purified tert-butyl isocyanate, and improving the purification efficiency of tert-butyl isocyanate;

[0021] The guide ring is used to block the liquid flowing downward along the inner wall of the condenser, preventing the condensed liquid from flowing back into the rotating bottle from the connecting port, thereby avoiding a reduction in the collection effect of the purified tert-butyl isocyanate, and further improving the purification efficiency of tert-butyl isocyanate;

[0022] The spiral plate connects two adjacent circles on the serpentine condenser tube, so that the liquid hanging on the serpentine condenser tube can quickly flow downward through the spiral plate and pass through each circle of the serpentine condenser tube, so that the condensed liquid can quickly flow into the collection bottle for collection, further improving the recovery efficiency of the condensed liquid.

[0023] The condensed liquid on the inner wall of the condenser, the serpentine condenser tube and the spiral plate is scraped by the outer scraper and the inner scraper to accelerate the convergence of the condensed liquid, so that small droplets converge into large droplets and then flow downward rapidly, which is beneficial to accelerate the recovery efficiency of the condensed liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of a first viewing angle stereoscopic structure of the present invention;

[0025] Figure 2 It is a schematic diagram of a second viewing angle stereoscopic structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the three-dimensional structure of the loading assembly, condensing assembly, feed valve, glass tube and stopper assembly of the present invention;

[0027] Figure 4It is a schematic diagram of the three-dimensional structure of the loading assembly, the condensing assembly and the glass tube assembly of the present invention;

[0028] Figure 5 It is a schematic diagram of the three-dimensional structure of the glass tube, the block, the condenser and the guide ring combination of the present invention;

[0029] Figure 6 It is a schematic diagram of the three-dimensional structure of the condenser, serpentine condenser tube, spiral plate and external scraper assembly of the present invention;

[0030] Figure 7 It is a schematic diagram of the three-dimensional structure of the serpentine condenser tube, spiral plate, outer scraper strip and inner scraper strip combined according to the present invention;

[0031] Figure 8 It is an exploded view of the serpentine condenser tube, spiral plate and external scraper strip of the present invention.

[0032] Among them: 1-intelligent fixing frame, 2-water bath, 3-feeding valve, 4-glass tube, 5-block, 101-rotating shaft, 102-rotating bottle, 103-DD motor, 104-gear, 105-gear ring, 201-condenser, 20101-insertion port, 20102-connection port, 20103-suction port, 20104-top cover, 20105-tank body, 20106-reinforcement buckle, 202-snake condenser, 203-collecting bottle, 204-guide ring, 301-spiral plate, 302-external scraper, 30201-external inclined portion, 303-inner scraper, 30301-inner inclined portion, 304-fixed seat, 305-servo motor. DETAILED DESCRIPTION

[0033] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. Example

[0034] like Figure 1-Figure 5 As shown, an intelligent purification device for tert-butyl isocyanate includes an intelligent fixing frame 1 and a water bath 2; the water bath 2 is arranged on the intelligent fixing frame 1;

[0035] It also includes a loading component, a condensation component, a feed valve 3, a glass tube 4 and a stopper 5; the loading component is arranged on the intelligent fixing frame 1; the condensation component is arranged on the intelligent fixing frame 1; the feed valve 3 is connected to the condensation component; the feed valve 3 is connected to the glass tube 4; and the stopper 5 is arranged on the outside of the glass tube 4.

[0036] The loading assembly includes a rotating shaft 101, a rotating bottle 102, a DD motor 103, a gear 104 and a gear ring 105; the rotating shaft 101 is rotatably connected to the intelligent fixing frame 1; the glass tube 4 runs through the middle of the rotating shaft 101; the rotating bottle 102 is detachably connected to the rotating shaft 101; the DD motor 103 is fixedly connected to the intelligent fixing frame 1; the gear 104 is fixedly connected to the output end of the DD motor 103; the gear ring 105 is fixedly connected to the outer side of the rotating shaft 101; the gear 104 and the gear ring 105 are meshed.

[0037] The condensation component includes a condenser 201, a serpentine condenser tube 202, a collecting bottle 203 and a guide ring 204; the condenser 201 is detachably connected to the intelligent fixing frame 1; a pipe insertion port 20101 is provided on the condenser 201; the feed valve 3 is detachably connected to the pipe insertion port 20101; a connecting port 20102 is provided on the condenser 201; the connecting port 20102 is connected to the intelligent fixing frame 1; a suction port 20103 is provided on the condenser 201; the suction port 20103 is connected to an external vacuum pump; a serpentine condenser tube 202 is fixedly connected to the inside of the condenser 201; the collecting bottle 203 is detachably connected to the lower side of the condenser 201; a guide ring 204 is fixedly connected to the lower inner side of the condenser 201; the guide ring 204 is located on the upper side of the connecting port 20102.

[0038] Furthermore, in order to prevent the condensed tert-butyl isocyanate from remaining at the angle formed by the stopper 5 and the outer side of the glass tube 4, the stopper 5 is configured to be in the shape of a flying saucer.

[0039] The present invention blocks the condensed and purified tert-butyl isocyanate on the glass tube 4 by means of a block 5, and causes it to drip downward into the collecting bottle 203, thereby solving the problem that the condensed and purified tert-butyl isocyanate flows back into the rotating bottle 102 along the outer side of the glass tube 4, resulting in a reduced collection effect of the purified tert-butyl isocyanate and a reduced purification efficiency. The specific process is as follows:

[0040] It should be noted that the tert-butyl isocyanate after condensation and purification is referred to as condensed liquid below. Before purifying tert-butyl isocyanate, the staff first adds pure water into the water bath 2, and then installs the rotating bottle 102 containing tert-butyl isocyanate on the rotating shaft 101, so that the rotating bottle 102 is in an inclined state and contacts the water in the water bath 2, and then installs the collecting bottle 203 to the lower side of the condenser 201, and connects the vacuum pump to the suction port 20103, and at the same time connects the external condensate supply equipment to the two ends of the serpentine condenser 202, so that the condensate flows through the serpentine condenser 202, and then the staff holds the feed valve 3 to insert the glass tube 4 from the insertion port 20101 into the condenser 201, and the glass tube 4 enters the condenser 201 and moves toward the connecting port 20102 until it is inserted into the rotating bottle 102, and then the feed valve 3 is plugged into the insertion port 20101 to complete the preparation work before purification.

[0041] After the feed valve 3 is plugged into the insertion port 20101, the vacuum pump is controlled to suck the inside of the condenser 201 through the suction port 20103, so that the condenser 201, the rotating bottle 102 and the collecting bottle 203 are in a negative pressure state. Then the staff connects the container loaded with tert-butyl isocyanate with the feed valve 3, and opens the feed valve 3. The tert-butyl isocyanate in the container is sucked into the rotating bottle 102 through the glass tube 4 by the negative pressure inside the rotating bottle 102. After the rotating bottle 102 is filled with an appropriate amount of After the tert-butyl isocyanate is removed, the feed valve 3 is closed. At this time, the intelligent fixing frame 1 is controlled to heat the water in the water bath 2 to the evaporation temperature of the tert-butyl isocyanate. At the same time, the DD motor 103 is controlled to drive the gear 104 to rotate, so that the gear 104 drives the gear ring 105 and the rotating shaft 101 to rotate together, and then the rotating shaft 101 drives the rotating bottle 102 to rotate in the water bath 2. The rotation of the rotating bottle 102 spreads the tert-butyl isocyanate liquid inside the rotating bottle 102 on the bottle wall of the rotating bottle 102 to form a film, which increases the liquid The surface area of ​​the rotating bottle 102 in contact with the air increases, thereby accelerating the evaporation rate of tert-butyl isocyanate. The tert-butyl isocyanate vapor evaporated from the rotating bottle 102 enters the condenser 201 from the bottle mouth of the rotating bottle 102 along the rotating shaft 101 from the connecting port 20102. After entering the condenser 201, the vapor floats upward. In this process, the vapor contacts the inner wall of the condenser 201 and the serpentine condenser tube 202 and condenses into liquid on the surface thereof. The condensed liquid flows along the inner wall of the condenser 201 and the serpentine condenser tube 202 to the condenser 201. It flows downward to the collecting bottle 203 for collection. During this process, part of the tert-butyl isocyanate vapor condenses on the outside of the glass tube 4 and flows along the inclined glass tube 4 toward the rotating bottle 102. The condensed liquid on the glass tube 4 is blocked by the block 5 and drips downward into the collecting bottle 203 for collection, preventing the condensed liquid from flowing back along the outside of the glass tube 4 to the rotating bottle 102, thereby avoiding a reduction in the collection effect of the purified tert-butyl isocyanate and improving the purification efficiency of the tert-butyl isocyanate.

[0042] When the condensed liquid flows downward along the inner wall of the condenser 201 and the serpentine condenser tube 202, the guide ring 204 blocks the liquid flowing downward along the inner wall of the condenser 201 to prevent the condensed liquid from flowing back from the connecting port 20102 to the rotating bottle 102, thereby avoiding a reduction in the collection effect of the purified tert-butyl isocyanate and further improving the purification efficiency of tert-butyl isocyanate.

[0043] When the tert-butyl isocyanate in the rotating bottle 102 is evaporated and purified, the staff stops the vacuum pump and opens the feed valve 3 at the same time, allowing the external gas to enter the condenser 201, the rotating bottle 102 and the collecting bottle 203 through the feed valve 3, so that the internal pressure remains stable with the outside world. Then the staff removes the rotating bottle 102 and the collecting bottle 203 respectively to complete the purification of tert-butyl isocyanate. Example

[0044] On the basis of Example 1, Figure 1-Figure 3 and Figure 6-Figure 8 As shown, a spiral plate 301 is also included; the spiral plate 301 is fixedly connected to the serpentine condenser tube 202; each circle layer on the spiral plate 301 is located between two adjacent circles on the serpentine condenser tube 202.

[0045] It also includes a driving unit, an outer scraper 302 and an inner scraper 303; the condenser 201 is composed of a top cover 20104 and a tank body 20105; a reinforcing buckle 20106 is detachably connected between the top cover 20104 and the tank body 20105; the reinforcing buckle 20106 is connected to the driving unit; a plurality of outer scrapers 302 in a circular array are connected to the driving unit; the outer side of each outer scraper 302 is in contact with the inner wall of the condenser 201; each outer scraper 302 is in contact with the outer side of the serpentine condenser tube 202 and the spiral plate 301; an inner scraper 303 is fixedly connected to each outer scraper 302; each inner scraper 303 is in contact with the inner side of the serpentine condenser tube 202 and the spiral plate 301; the outer scraper 302 and the inner scraper 303 are made of soft rubber on the side in contact with the serpentine condenser tube 202.

[0046] The driving unit includes a fixing seat 304 and a servo motor 305 ; the fixing seat 304 is detachably connected to the reinforcing buckle 20106 ; the servo motor 305 is fixedly connected to the fixing seat 304 ; and each outer scraper strip 302 is fixedly connected to the output end of the servo motor 305 .

[0047] Each outer scraper strip 302 is provided with an outer inclined portion 30201 at the bottom; each inner scraper strip 303 is provided with an inner inclined portion 30301 at the bottom; each outer inclined portion 30201 and the corresponding inner inclined portion 30301 form an eight-shaped shape.

[0048] A sealing ring layer is provided at the connection between the top cover 20104 and the tank body 20105.

[0049] It is also considered that, due to the spacing between the coils of the serpentine condenser tube 202 inside the existing condenser 201, the liquid condensed on the serpentine condenser tube 202 can only flow downward in a spiral along the outside of the serpentine condenser tube 202. When the condensation amount is small, the condensed liquid can only form a sagging phenomenon on the lower side of each coil of the serpentine condenser tube 202, which reduces the recovery efficiency of the condensed liquid. The specific solution process is as follows:

[0050] When tert-butyl isocyanate is purified, the spiral plate 301 is used to connect two adjacent circles on the serpentine condenser 202, so that the liquid hanging on the serpentine condenser 202 can quickly flow downward through the spiral plate 301 and pass through each circle of the serpentine condenser 202, so that the condensed liquid can quickly flow into the collecting bottle 203 for collection, thereby further improving the recovery efficiency of the condensed liquid.

[0051] When the condensed liquid flows downward through the spiral plate 301, the servo motor 305 drives the outer scraper 302 and the inner scraper 303 to rotate reciprocatingly, so that the outer scraper 302 and the inner scraper 303 scrape the condensed liquid on the inner wall of the condenser 201, the serpentine condenser tube 202 and the spiral plate 301, thereby accelerating the convergence of the condensed liquid, causing small droplets to converge into large droplets and then flow rapidly downward. When the condensed liquid flows to the bottom of the outer scraper 302 and the inner scraper 303, the condensed liquid is converged again by the outer inclined portion 30201 and the inner inclined portion 30301 and then flows into the collection bottle 203 for collection, thereby preventing the condensed liquid from hanging at the bottom of the outer scraper 302 and the inner scraper 303, which is beneficial to accelerating the recovery efficiency of the condensed liquid.

[0052] It is also considered that when the outer scraper strip 302 and the inner scraper strip 303 are inserted into the condenser 201 equipped with the serpentine condenser tube 202, the serpentine condenser tube 202 is avoided by forming an eight-shaped outer inclined portion 30201 and an inner inclined portion 30301, which is beneficial to enhance the protection effect of the serpentine condenser tube 202 when assembling the outer scraper strip 302 and the inner scraper strip 303, while improving the convenience of assembly.

[0053] When the condenser 201 is disassembled after the experiment is completed, if the condenser 201 accidentally falls from the hands of the staff and knocks onto the laboratory table, the rubber layer on the outer scraper strip 302 and the inner scraper strip 303 provides buffer protection for the serpentine condenser tube 202, preventing the serpentine condenser tube 202 from being knocked and broken inside the condenser 201, thereby improving the protection effect of the serpentine condenser tube 202.

[0054] A method for purifying tert-butyl isocyanate comprises the following steps:

[0055] S1: Assembling, installing the condenser 201 on the intelligent fixing frame 1, and then inserting the feed valve 3 and the glass tube 4 into the condenser 201;

[0056] S2: Purification by evaporation, the tert-butyl isocyanate in the rotary bottle 102 is heated by hot water in the water bath 2, so that it evaporates and enters the condenser 201;

[0057] S3: Condensation and collection: the temperature in the condenser 201 is lowered by the serpentine condenser tube 202, so that the tert-butyl isocyanate vapor is condensed and flows into the collection bottle 203 for collection;

[0058] S4: Backflow prevention, the condensed liquid backflowing on the glass tube 4 is blocked by the block 5 to prevent the condensed liquid from backflowing along the outer side of the glass tube 4 into the rotating bottle 102;

[0059] S5: Accelerate the recovery. The servo motor 305 drives the outer scraper bar 302 and the inner scraper bar 303 to scrape and gather the condensed liquid on the inner wall of the condenser 201, the serpentine condenser tube 202 and the spiral plate 301, thereby accelerating the recovery rate of the condensed liquid.

[0060] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An intelligent purification device for tert-butyl isocyanate, comprising an intelligent fixing frame (1) and a water bath (2); the intelligent fixing frame (1) is provided with a water bath (2) for heating tert-butyl isocyanate; characterized in that: It also comprises a loading component, a condensing component, a feed valve (3), a glass tube (4) and a stopper (5); a loading component for loading tert-butyl isocyanate is arranged on the intelligent fixing frame (1); a condensing component for condensing evaporated liquid is arranged on the intelligent fixing frame (1); the condensing component is connected to the feed valve (3); the feed valve (3) is connected to the glass tube (4) for transmitting tert-butyl isocyanate; a stopper (5) for blocking the reflux of condensed liquid is arranged on the outer side of the glass tube (4); It also includes a spiral plate (301); the spiral plate (301) for improving the recovery efficiency of condensed liquid is fixedly connected to the serpentine condensing tube (202); each coil layer on the spiral plate (301) is located between two adjacent coil layers on the serpentine condensing tube (202); The invention also includes a drive unit, an outer scraper (302) and an inner scraper (303); the condenser (201) is composed of a top cover (20104) and a tank body (20105); a reinforcing buckle (20106) is connected between the top cover (20104) and the tank body (20105); the drive unit is connected to the reinforcing buckle (20106); the drive unit is connected to a plurality of outer scrapers (302); the outer side of each outer scraper (302) is connected to the condenser (201) is fitted with the inner wall; each outer scraper strip (302) is fitted with the outer side of the serpentine condenser tube (202) and the spiral plate (301); each outer scraper strip (302) is fixedly connected to an inner scraper strip (303); each inner scraper strip (303) is fitted with the inner side of the serpentine condenser tube (202) and the spiral plate (301); the sides of the outer scraper strip (302) and the inner scraper strip (303) that are in contact with the serpentine condenser tube (202) are made of soft rubber material.

2. The intelligent purification device for tert-butyl isocyanate according to claim 1, characterized in that: The loading assembly comprises a rotating shaft (101), a rotating bottle (102), a DD motor (103), a gear (104) and a toothed ring (105); the rotating shaft (101) is rotatably connected to the intelligent fixing frame (1); the glass tube (4) passes through the middle of the rotating shaft (101); the rotating bottle (102) for loading tert-butyl isocyanate is connected to the rotating shaft (101); the DD motor (103) is fixedly connected to the intelligent fixing frame (1); the gear (104) is fixedly connected to the output end of the DD motor (103); the toothed ring (105) is fixedly connected to the outer side of the rotating shaft (101); the gear (104) and the toothed ring (105) are meshed.

3. The intelligent purification device for tert-butyl isocyanate according to claim 2, characterized in that: The condensation assembly comprises a condenser (201), a serpentine condenser tube (202), a collection bottle (203) and a guide ring (204); the condenser (201) is connected to the intelligent fixing frame (1); a pipe insertion port (20101) is provided on the condenser (201); a feed valve (3) is connected to the pipe insertion port (20101); a connection port (20102) is provided on the condenser (201); the connection port (20102) is connected to the intelligent fixing frame (1); the condenser A suction port (20103) is provided on (201); the suction port (20103) is connected to an external vacuum pump; a serpentine condenser tube (202) for condensing evaporated gas is fixedly connected inside the condenser (201); a collecting bottle (203) for collecting condensed liquid is connected to the lower side of the condenser (201); a guide ring (204) for guiding condensed liquid is fixedly connected to the lower inner side of the condenser (201); the guide ring (204) is located on the upper side of the connection port (20102).

4. The intelligent purification device for tert-butyl isocyanate according to claim 1, characterized in that: The stopper (5) is arranged in a flying saucer shape.

5. The intelligent purification device for tert-butyl isocyanate according to claim 4, characterized in that: The drive unit comprises a fixing seat (304) and a servo motor (305); the fixing seat (304) is connected to the reinforcing buckle (20106); the servo motor (305) is fixedly connected to the fixing seat (304); and each outer scraper strip (302) is fixedly connected to the output end of the servo motor (305).

6. The intelligent purification device for tert-butyl isocyanate according to claim 5, characterized in that: Each outer scraper strip (302) is provided with an outer inclined portion (30201) at the bottom; each inner scraper strip (303) is provided with an inner inclined portion (30301) at the bottom; each outer inclined portion (30201) and the corresponding inner inclined portion (30301) form an eight-shaped shape.

7. An intelligent purification device for tert-butyl isocyanate according to any one of claims 5-6, characterized in that: A sealing ring layer is provided at the connection between the top cover (20104) and the tank body (20105).

8. A method for purifying tert-butyl isocyanate, characterized in that: The intelligent purification device for tert-butyl isocyanate according to claim 7 comprises the following working steps: S1: Assembling, installing the condenser (201) on the intelligent fixing frame (1), and then inserting the feed valve (3) and the glass tube (4) into the condenser (201); S2: Purification by evaporation, wherein the tert-butyl isocyanate in the rotary bottle (102) is heated by hot water in the water bath (2) to evaporate the tert-butyl isocyanate and enter the condenser (201); S3: condensation and collection, cooling the condenser (201) through the serpentine condenser tube (202) to condense the tert-butyl isocyanate vapor and flow it into the collection bottle (203) for collection; S4: backflow prevention, blocking the condensed liquid that flows back on the glass tube (4) by means of a block (5), thereby preventing the condensed liquid from flowing back along the outer side of the glass tube (4) into the rotating bottle (102); S5: Accelerating recovery, by driving the outer scraper (302) and the inner scraper (303) through the servo motor (305) to scrape and gather the condensed liquid on the inner wall of the condenser (201), the serpentine condenser tube (202) and the spiral plate (301), thereby accelerating the recovery rate of the condensed liquid.

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