Acetoacetanilide refining equipment and process thereof

Abstract

The invention discloses acetoacetanilide refining equipment and a process thereof. The acetoacetanilide refining equipment comprises a mounting platform, a control module, a reaction mechanism, an injection module, an accurate dropwise adding module and a material adding module, the control module is mounted at the top of the mounting platform; the reaction mechanism is embedded in the middle of the inner side of the mounting platform; the injection module is arranged at the top end of the mounting platform and located on the right side of the reaction mechanism, and the injection module is electrically connected with the control module; the accurate dripping module is arranged at the top end of the mounting platform and is positioned on the rear side of the reaction mechanism; according to the acetoacetanilide refining equipment and the acetoacetanilide refining process, the reaction container is movably connected with the heating part, so that the reaction container and a heat source can be quickly separated from each other when the acetoacetanilide is heated and then cooled in the acetoacetanilide refining process; the temperature in the reaction container is quickly reduced, and the acetoacetanilide refining efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of acetoacetanilide, in particular to an acetoacetanilide refining equipment and process thereof. BACKGROUND

[0002] Acetoacetanilide, also known as acetoacetanilide, has a molecular weight of 177.2, is a white or slightly yellow powder, is soluble in ethanol, chloroform, diethyl ether, hot benzene, hot petroleum ether, acid and hydroxide solution, slightly soluble in water, turns purple when encountering ferric dichloride, is flammable, decomposes upon heating to release toxic nitrogen oxide smoke, is mainly used for manufacturing sun-resistant yellow and biphenyl yellow organic pigments, and is used for organic synthesis, is an important intermediate for dyes, organic pigments, pesticides and fungicides; The existing acetoacetanilide refining process uses the invention with the application publication number CN113979883A, which discloses an acetoacetanilide refining process and equipment. The acetoacetanilide refining process includes the following steps: step one, preparing raw materials; step two, synthesis reaction; step three, cooling; and step four, refining the finished product. In step one, 46-53 kg of aniline, 38-43 kg of divinyl ketone, and 10-16 kg of ethanol are prepared. In step two, the aniline and divinyl ketone are subjected to diacetylation reaction in a reaction kettle. The present application has a simple acetoacetanilide refining process, is easy to operate, and has good product refining effect. The temperature adjusting assembly is provided, the reaction kettle body is heated by the spiral heating pipe, the heating effect is good, the heating is uniform, the catalyst is provided to improve the reaction speed of the chemicals, the stirring assembly is provided to stir the chemicals in the reaction kettle, the stirring effect is good, the chemicals can be fully reacted, and the working efficiency is effectively improved. However, the above-mentioned device and the reaction kettle on the market have the same shortcomings, that is, the reaction vessel heating device is fixed, and when rapid cooling is required after heating during the acetoacetanilide refining process, the reaction vessel needs to be quickly separated from the heat source, so that the heat in the heater and the reaction vessel itself cannot be quickly discharged, and rapid cooling cannot be achieved. SUMMARY

[0003] The present application aims to provide an acetoacetanilide refining equipment and process thereof to solve the problems in the above background.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solution: an acetoacetanilide refining equipment, comprising: a mounting platform; a control module installed on the top of the mounting platform; a reaction mechanism embedded in the middle of the inner side of the mounting platform; An injection module is arranged at the top end of the mounting platform and located at the right side of the reaction mechanism, and the injection module is electrically connected with the control module; A precise dropwise adding module is arranged at the top end of the mounting platform and located at the back side of the reaction mechanism, and the precise dropwise adding module is electrically connected with the control module; A material adding module is arranged at the top end of the mounting platform and located outside the reaction mechanism, and the material adding module is electrically connected with the control module.

[0005] Preferably, the reaction mechanism comprises a heat preservation shell, a sealing ring, a reaction tank, a stirring module, a solenoid valve, a discharge pump, a refrigerator and a rapid heating module; the heat preservation shell is arranged at the bottom of the mounting platform, a through hole is formed in the middle of the top end of the inner cavity of the heat preservation shell, the sealing ring is arranged at the bottom of the inner cavity of the heat preservation shell and located below the opening of the top end of the inner cavity of the heat preservation shell, the reaction tank is arranged at the inner side of the sealing ring, a plurality of feeding valve ports are formed in the top end of the reaction tank and connected with the discharge ports of the precise dropwise adding module and the material adding module respectively, the stirring module is arranged at the middle of the inner side of the reaction tank and electrically connected with the control module, the solenoid valve is arranged at the top of the inner cavity of the reaction tank and electrically connected with the control module, the discharge pump is arranged at the bottom of the inner cavity of the reaction tank and connected with the solenoid valve, the discharge pump is electrically connected with the control module, the refrigerator is embedded in the front side of the inner cavity of the heat preservation shell and electrically connected with the control module, and the rapid heating module is arranged in the inner cavity of the heat preservation shell and located outside the reaction tank.

[0006] Preferably, the rapid heating module comprises a mounting frame, a mounting base, a top plate, a rotating shaft seat, an electric push rod and a connecting rod; the mounting frame is arranged along the front-rear direction on the inner wall of the heat preservation shell; the mounting base is arranged along the up-down direction at the top end of the rear side of the mounting frame; the top plate is arranged at the top end of the mounting base and fixedly connected with the inner wall of the mounting frame; the rotating shaft seat is rotatably connected with the top end of the outer wall of the mounting base through a bearing, and the top end of the rotating shaft seat extends out of the upper surface of the top plate; one end of the electric push rod is rotatably connected with the bottom end of the top plate through a rotating seat, and the electric push rod is electrically connected with the control module; one end of the connecting rod is rotatably connected with the other end of the electric push rod through a pin shaft, and the other end of the connecting rod is rotatably connected with the other end of the electric push rod through a pin shaft.

[0007] Preferably, the connecting rod is in the shape of an arc.

[0008] Preferably, the rapid heating module further comprises a limiting sliding groove, a cross rail frame, a limiting sliding seat, a heating assembly and a limiting sliding block. The number of limiting slide grooves is four, and the four limiting slide grooves are respectively opened at 90-degree intervals along the circumferential direction on the top surface of the top plate from the outside to the inside; the cross guide rail frame is keyed to the top of the rotating shaft seat; the number of limiting sliding seats is four, and the four limiting sliding seats are respectively sleeved on the four sides of the outer wall of the cross guide rail frame; the number of heating components is four, and the four heating components are respectively installed on the top of the four limiting sliding seats; the number of limiting sliders is four, and the four limiting sliders are respectively installed on the bottom of the four limiting sliding seats, and the four limiting sliders are respectively adapted to and inserted into the inner cavity of the four limiting slide grooves.

[0009] Preferably, the heating assembly includes: a heating assembly shell, a heater, a mounting groove, a sealing plate, a miniature electric actuator, and a mounting plate; the heating assembly shell is disposed at the top of the limiting sliding seat along the vertical direction; the heater is embedded inside the heating assembly shell, and the heater is electrically connected to the control module; the mounting groove is formed through the outer side of the inner cavity of the heating assembly shell; there are two sealing plates, which are respectively hinged to the left and right sides of the inner cavity of the mounting groove; there are two sets of mounting plates, each set containing two miniature electric actuators, which are respectively disposed at the left and right ends of the outer side of the inner cavity of the sealing plate, and the outer sides of the two sets of miniature electric actuators are respectively fixedly connected to the inner sides of the left and right sealing plates, and the miniature electric actuators are electrically connected to the control module; the mounting plate is disposed in the middle of the inner cavity of the mounting groove along the left and right direction; wherein, auxiliary heating assemblies are disposed on both the left and right sides of the inner cavity of the mounting groove.

[0010] Preferably, the auxiliary heating assembly includes: a rotating drum, a micro motor, a worm gear, a worm, a movable base, a micro multi-stage electric actuator, a limiting rod, a rotating rod, and an arc-shaped heating plate; the rotating drum is rotatably connected to the inner side of the mounting plate via bearings in the vertical direction; the micro motor is located at the top center of the mounting plate, and the micro motor is electrically connected to the control module; the worm gear is keyed to the outer wall of the rotating drum; the worm screw is connected to one output end of the micro motor, and the worm meshes with the worm gear; there are two movable bases, which are respectively inserted into the upper and lower sides of the inner cavity of the rotating drum; there are two micro multi-stage electric actuators, which are respectively positioned in the vertical direction... On the upper and lower sides of the inner cavity of the rotating drum, the telescopic ends of the two miniature multi-stage electric actuators are fixedly connected to the inner side of the moving base, and the miniature multi-stage electric actuators are electrically connected to the control module; there are two limiting rods, one end of which is rotatably connected to the upper and lower sides of the outer wall of the rotating drum via pins; there are two rotating rods, one end of which is rotatably connected to the other end of the upper and lower limiting rods via pins, and one end of which is rotatably connected to the outer side of the upper and lower moving bases via pins; there are two arc-shaped heating plates, which are respectively disposed on the inner side of the other end of the upper and lower rotating rods, and the arc-shaped heating plates are electrically connected to the control module.

[0011] Compared with the prior art, the beneficial effects of the present invention are: the acetoacetanilide refining equipment and process: 1. By extending and retracting the electric actuator, the rotating shaft seat is driven to rotate in cooperation with the connecting rod. This causes the rotating shaft seat to drive the cross guide rail frame to rotate, and the cross guide rail frame to drive the upper limit sliding seat at the corresponding position to move along the outside of the cross guide rail frame. At the same time, the limiting slider moves along the inner cavity of the upper limit sliding groove at the corresponding position. Under the limiting action of the limiting slider, the limiting sliding seat drives the heating component at the corresponding position to move inward or outward.

[0012] 2. By shortening the inner length of the two miniature multi-stage electric actuators, the moving seat at the corresponding position is driven to move inward. The moving seat drives the rotating rod to rotate to a horizontal state. The miniature motor drives the worm gear to rotate. Under the action of the worm gear's rotational force, the worm wheel drives the rotating drum to rotate, and the arc-shaped heating plate is brought into contact with the outer wall of the reaction vessel. The heater and the arc-shaped heating plate generate heat, which is passed through the outer wall of the reaction vessel to heat the reaction solution inside the reaction vessel, thus raising the internal temperature of the reaction vessel.

[0013] 3. The stirring module agitates the solution and catalyst inside the reaction vessel, while the refrigeration unit maintains the internal temperature of the reaction vessel at [temperature value missing] degrees Celsius, ensuring a complete reaction between aniline and catalyst. The four-sided heating components move outwards, disengaging from the outer wall of the reaction vessel, thus ceasing heating. The refrigeration unit cools the interior of the insulation shell to [temperature value missing] degrees Celsius, and a precise dripping module slowly adds diketene into the reaction vessel over a controlled time of [time value missing]. The reactants are then refluxed for [time value missing] hours, while the four-sided heating components move inwards again to re-engage with the outer wall of the reaction vessel, maintaining the internal temperature at [temperature value missing] degrees Celsius. The stirring module agitates the reaction solution inside the reaction vessel for [time value missing]. After agitation, the four-sided heating components move outwards, disengaging from the outer wall of the reaction vessel, thus ceasing heating. The refrigeration unit cools the inner cavity of the insulation shell, rapidly reducing the internal temperature of the reaction vessel to [temperature value missing] degrees Celsius within [time value missing]. The discharge pump removes the crystals precipitated inside the reaction vessel, which are then filtered and dried externally to obtain the refined finished product.

[0014] In summary, this invention enables the reaction vessel and the heating part to be connected in a movable manner, allowing the reaction vessel to quickly separate from the heat source during the cooling process after heating in the acetoacetanilide refining process. This results in a rapid decrease in the internal temperature of the reaction vessel and improves the refining efficiency of acetoacetanilide. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Structural diagram; Figure 3 for Figure 1 Exploded view of the rapid heating module; Figure 4 for Figure 3 A schematic diagram of the heating component structure; Figure 5 for Figure 4 Exploded view of the heating components.

[0016] In the diagram: 1. Mounting platform; 2. Control module; 3. Reaction mechanism; 31. Insulation shell; 32. Sealing ring; 33. Reaction tank; 34. Stirring module; 35. Solenoid valve; 36. Discharge pump; 37. Refrigeration unit; 4. Injection module; 5. Precision dripping module; 6. Material feeding module; 7. Rapid heating module; 71. Mounting bracket; 72. Mounting base; 73. Top plate; 74. Rotary shaft seat; 75. Electric actuator; 76. Connecting rod; 77. Limiting slide. 78. Groove; 79. Cross guide rail frame; 710. Limiting sliding seat; 8. Limiting slider; 8. Heating assembly; 81. Heating assembly housing; 82. Heater; 83. Mounting groove; 84. Sealing plate; 85. Miniature electric actuator; 86. Mounting plate; 87. Rotary drum; 88. Miniature motor; 89. Worm gear; 810. Worm; 811. Moving seat; 812. Miniature multi-stage electric actuator; 813. Limiting rod; 814. Rotating rod; 815. Arc-shaped heating plate. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-5 This invention provides a technical solution: an acetoacetanilide refining device, comprising: an installation platform 1, a control module 2, a reaction mechanism 3, an injection module 4, a precision dripping module 5, and a feeding module 6; the control module 2 is installed on the top of the installation platform 1, and can be controlled manually by the operator or by an internally preset logic program; the reaction mechanism 3 is embedded in the inner middle of the installation platform 1; the injection module 4 is located at the top of the installation platform 1 and to the right of the reaction mechanism 3, the injection module 4 and the control module 2 are electrically connected, and the injection module 4 can be controlled by the control module 2, and the injection module 4 can supply material to the reaction tank 33 via an external solenoid valve 35. The internal injection solution; the precise dripping module 5 is located at the top of the mounting platform 1 and behind the reaction mechanism 3. The precise dripping module 5 is electrically connected to the control module 2. The feeding module 6 can be controlled by the control module 2. The feeding module 6 can inject solid powder into the reaction tank 33 through the external feed valve port. The feeding module 6 is located at the top of the mounting platform 1 and outside the reaction mechanism 3. The feeding module 6 is electrically connected to the control module 2. The feeding module 6 can be controlled by the control module 2. The feeding module 6 can inject solid powder into the reaction tank 33 through the external feed valve port.

[0019] As a preferred option, further, such as Figure 2 As shown, the reaction mechanism 3 includes: an insulating shell 31, a sealing ring 32, a reaction vessel 33, a stirring module 34, a solenoid valve 35, a discharge pump 36, a chiller 37, and a rapid heating module 7. The insulating shell 31 is located at the bottom of the mounting platform 1, and a through hole is opened in the middle of the top of the inner cavity of the insulating shell 31. The sealing ring 32 is installed at the bottom of the inner cavity of the insulating shell 31 and is located below the opening at the top of the inner cavity of the insulating shell 31. The sealing ring 32 serves to insulate the connection between the reaction vessel 33 and the insulating shell 31. The reaction vessel 33 is located inside the sealing ring 32. Several feed valve ports are opened at the top of the reaction vessel 33 and are respectively connected to the discharge ports of the precision dripping module 5 and the feeding module 6. The reaction vessel 33 is made of a thermally conductive material. The stirring module 34 is installed in the middle of the inner side of the reaction vessel 33. The stirring module 34 is electrically connected to the control module 2. The stirring module 34 can be controlled by the control module 2. Block 2 controls the stirring inside the reaction vessel 33; Solenoid valve 35 is located at the top of the inner cavity of the reaction vessel 33, and is electrically connected to control module 2. Solenoid valve 35 can be opened and closed by control module 2; Discharge pump 36 is located at the bottom of the inner cavity of the reaction vessel 33, and is connected to solenoid valve 35. Discharge pump 36 is electrically connected to control module 2. Discharge pump 36 can be controlled by control module 2 and can discharge the crystals precipitated inside the reaction vessel 33; Cooler 37 is embedded in the front of the inner cavity of the insulation shell 31, and is electrically connected to control module 2. Cooler 37 can be controlled by control module 2 and can achieve rapid cooling of the reaction vessel 33 by cooling the entire inner cavity of the insulation shell 31; Rapid heating module 7 is installed in the inner cavity of the insulation shell 31 and located on the outside of the reaction vessel 33.

[0020] As a preferred option, further, such as Figure 3As shown, the rapid heating module 7 includes: a mounting bracket 71, a mounting base 72, a top plate 73, a rotating shaft seat 74, an electric push rod 75, a connecting rod 76, a limiting slide groove 77, a cross guide rail 78, a limiting sliding seat 79, a heating component 8, and a limiting slider 710; the mounting bracket 71 is installed on the inner wall of the insulation shell 31 in the front-to-back direction; the mounting base 72 is located at the rear top of the mounting bracket 71 in the up-down direction; the top plate 73 is located at the top of the mounting base 72 and is fixedly connected to the inner wall of the mounting bracket 71; the rotating shaft seat 74 is rotatably connected to the top of the outer wall of the mounting base 72 via a bearing, and the top of the rotating shaft seat 74 extends out of the upper surface of the top plate 73; one end of the electric push rod 75 is rotatably connected to the bottom end of the top plate 73 via a rotating seat, the electric push rod 75 is electrically connected to the control module 2, and the electric push rod 75 can be controlled by the control module 2; the electric push rod 75 can drive the connecting rod 76 to rotate by its own extension and retraction; one end of the connecting rod 76 rotates via a pin. The other end of the connecting rod 76 is connected to the other end of the electric push rod 75 via a pin; there are four limiting slide grooves 77, which are opened at 90-degree intervals along the circumferential direction from the outside to the inside on the upper surface of the top plate 73; the cross guide rail frame 78 is keyed to the top of the rotating shaft seat 74; there are four limiting sliding seats 79, which are respectively sleeved on the four sides of the outer wall of the cross guide rail frame 78, and the limiting sliding seats 79 can move inward or outward on the outer wall of the cross guide rail frame 78; there are four heating components 8, which are respectively installed on the top of the four limiting sliding seats 79; there are four limiting sliders 710, which are respectively installed on the bottom of the four limiting sliding seats 79, and the four limiting sliders 710 are respectively adapted to and inserted into the inner cavity of the four limiting slide grooves 77, and the limiting sliders 710 can move inward and outward along the inner cavity of the limiting slide grooves 77.

[0021] As a preferred embodiment, the connecting rod 76 is further arc-shaped, and the electric actuator 75 extends and retracts to drive the rotating shaft seat 74 to rotate clockwise or counterclockwise in cooperation with the connecting rod 76.

[0022] As a preferred option, further, such as Figure 4As shown, the heating assembly 8 includes: a heating assembly housing 81, a heater 82, a mounting groove 83, a sealing plate 84, a miniature electric actuator 85, and a mounting plate 86; the heating assembly housing 81 is disposed at the top of the limiting sliding seat 79 in the vertical direction; the heater 82 is embedded inside the heating assembly housing 81, and the heater 82 is electrically connected to the control module 2. The heater 82 can be controlled to open and close by the control module 2 to achieve contact with the outer wall of the reaction vessel 33 while heating the inside of the reaction vessel 33; the mounting groove 83 is formed through the outer side of the inner cavity of the heating assembly housing 81; there are two sealing plates 84, which are respectively hinged to the left and right sides of the inner cavity of the mounting groove 83, and the sealing plates 84 can be hinged to the mounting groove 83. The position can rotate outwards or inwards; there are two sets of mounting plates 86, each set containing two miniature electric actuators 85. The two miniature electric actuators 85 are respectively located at the left and right ends of the outer side of the inner cavity of the sealing plate 84. The outer sides of the two sets of miniature electric actuators 85 are fixedly connected to the inner sides of the left and right sealing plates 84, respectively. The miniature electric actuators 85 are electrically connected to the control module 2, and the extension and retraction of the miniature electric actuators 85 can be controlled by the control module 2; the mounting plates 86 are located in the middle of the inner cavity of the mounting groove 83 along the left and right directions; auxiliary heating components are provided on both the left and right sides of the inner cavity of the mounting groove 83, and the auxiliary heating components include: a rotating drum 87, a miniature motor 88, a worm gear 89, a worm 810, a moving seat 811, and a miniature multi-stage electric actuator 81. 2. Limiting rod 813, rotating rod 814, and arc-shaped heating plate 815; the rotating drum 87 is rotatably connected to the inner side of the mounting plate 86 via bearings in the vertical direction; the micro motor 88 is located at the top center of the mounting plate 86, and is electrically connected to the control module 2. The micro motor 88 can be controlled by the control module 2 to drive the worm gear 810 to rotate clockwise or counterclockwise; the worm wheel 89 is keyed to the outer wall of the rotating drum 87; the worm gear 810 is screwed to one side of the output end of the micro motor 88, and the worm gear 810 meshes with the worm wheel 89; there are two moving seats 811, which are respectively inserted into the upper and lower sides of the inner cavity of the rotating drum 87; there are two micro multi-stage electric actuators 812, which are two micro Multi-stage electric actuators 812 are respectively arranged on the upper and lower sides of the inner cavity of the rotating drum 87 along the vertical direction. The telescopic ends of the two miniature multi-stage electric actuators 812 are fixedly connected to the inner side of the moving base 811. The miniature multi-stage electric actuators 812 are electrically connected to the control module 2. The miniature multi-stage electric actuators 812 can be controlled by the control module 2 to achieve multi-stage telescopic movement. There are two limit rods 813. One end of the two limit rods 813 is rotatably connected to the upper and lower sides of the outer wall of the rotating drum 87 by a pin. There are two rotating rods 814. The two rotating rods 814 are rotatably connected to the other ends of the upper and lower limit rods 813 by a pin. One end of the two rotating rods 814 is rotatably connected to the outer side of the upper and lower moving bases 811 by a pin.Two arc-shaped heating plates 815 are provided, each positioned inside the other end of one of the upper or lower rotating rods 814. The arc-shaped heating plates 815 are electrically connected to the control module 2. The control module 2 controls the opening and closing of the arc-shaped heating plates 815 to achieve contact with the outer wall of the reaction vessel 33 while simultaneously heating the interior of the reaction vessel 33.

[0023] A refining process for acetoacetanilide refining equipment, the specific steps of which are as follows: Step 1: Aniline, diketene, ethanol, aqueous solution and catalyst are quantitatively added into the reaction vessel 33 through the feeding module 6 and the injection module 4, respectively; Step 2: Control the extension and retraction of the electric actuator 75 to drive the rotating shaft seat 74 to rotate clockwise or counterclockwise in cooperation with the connecting rod 76. The rotating shaft seat 74 drives the cross guide frame 78 to rotate clockwise or counterclockwise above the top plate 73. At the same time, the cross guide frame 78 drives the corresponding upper limit sliding seat 79 to move along the outside of the cross guide frame 78, and the limiting slider 710 moves along the inner cavity of the corresponding upper limit sliding groove 77. Under the limiting action of the limiting slider 710, the limiting sliding seat 79 drives the heating component 8 at the corresponding position to move inward or outward, so as to achieve rapid separation from the external heat source of the reaction vessel 33. Step 3: Control the extension of the micro electric actuator 85 to drive the sealing plate 84 at the corresponding position to rotate outward at the hinge position with the mounting groove 83, causing the sealing plate 84 to release the seal on the inner cavity of the mounting groove 83. The upper and lower micro multi-stage electric actuators 812 shorten inward to drive the moving seat 811 at the corresponding position to move inward, thereby causing the moving seat 811 to drive the rotating rod 814 to rotate to a horizontal state with the pin connection point with the moving seat 811 as the vertex. Step 4: The micro motor 88 in the auxiliary heating components on both sides drives the worm gear 810 to rotate. The worm wheel 89 drives the rotating drum 87 to rotate under the rotational force of the worm gear 810. In turn, the rotating drum 87 drives the arc-shaped heating plate 815 to rotate inward under the cooperation of the upper limit rod 813 and the rotating rod 814 at the corresponding position, so that the arc-shaped heating plate 815 is in contact with the outer wall of the reaction vessel 33. Step 5: Heat generated inside heater 82 and arc heating plate 815 is passed through the outer wall of reaction vessel 33 to heat the reaction solution inside reaction vessel 33, raising the internal temperature of reaction vessel 33 to 65 degrees Celsius. Stirring module 34 stirs the solution and catalyst inside reaction vessel 33 to ensure that aniline and catalyst react fully in the solution. Step Six: With the cooperation of connecting rod 76, rotating shaft seat 74, cross guide rail frame 78 and limiting sliding seat 79, electric push rod 75 moves the four-sided heating components 8 outward to disengage from the outer wall of reaction vessel 33, so as to stop heating the inside of reaction vessel 33. Cooler 37 cools the inside of insulation shell 31 by 15 degrees Celsius, and diketene is slowly added into reaction vessel 33 by precision dripping module 5, with the dripping time controlled at 0.5 hours. Step 7: Recirculate the reactants for 1 hour, while the four-sided heating components 8 move inward to contact the outer wall of the reaction vessel 33 again for heating, keeping the internal temperature of the reaction vessel 33 at 45 degrees Celsius, and the stirring module 34 stirs the reaction solution inside the reaction vessel 33 for 2 hours. Step 8: After stirring is complete, the four heating components 8 move outward to detach from the outer wall of the reaction vessel 33 so that they stop heating it. The refrigeration unit 37 cools the inner cavity of the insulation shell 31 so that the internal temperature of the reaction vessel 33 drops rapidly to 2 degrees Celsius within 10 minutes. Step 9: Discharge pump 36 discharges the crystals precipitated inside reaction tank 33, and obtains the refined finished product through external filtration and drying.

[0024] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A purification apparatus for acetoacetanilide, characterized in that, include: Installation platform (1); The control module (2) is installed on top of the mounting platform (1); The reaction mechanism (3) is embedded in the middle of the inner side of the mounting platform (1); An injection module (4) is disposed at the top of the mounting platform (1) and located to the right of the reaction mechanism (3). The injection module (4) and the control module (2) are electrically connected. A precision dripping module (5) is set at the top of the mounting platform (1) and located behind the reaction mechanism (3). The precision dripping module (5) and the control module (2) are electrically connected. The feeding module (6) is located at the top of the mounting platform (1) and outside the reaction mechanism (3). The feeding module (6) and the control module (2) are electrically connected.

2. The acetoacetanilide refining equipment according to claim 1, characterized in that, The reaction mechanism (3) includes: An insulating shell (31) is disposed at the bottom of the mounting platform (1), and a through hole is provided at the top center of the inner cavity of the insulating shell (31); A sealing ring (32) is installed at the bottom of the inner cavity of the insulation shell (31) and located below the top opening of the inner cavity of the insulation shell (31); The reaction vessel (33) is located inside the sealing ring (32). The top of the reaction vessel (33) is provided with several feed valve ports, which are respectively connected to the discharge ports of the precision dripping module (5) and the feeding module (6). A stirring module (34) is installed in the middle of the inner side of the reaction vessel (33), and the stirring module (34) and the control module (2) are electrically connected; A solenoid valve (35) is disposed at the top of the inner cavity of the reaction vessel (33), and the solenoid valve (35) is electrically connected to the control module (2); A discharge pump (36) is installed at the bottom of the inner cavity of the reaction vessel (33). The discharge pump (36) is connected to a solenoid valve (35) and is electrically connected to the control module (2). A refrigeration unit (37) is embedded in the front side of the inner cavity of the heat-insulating shell (31), and the refrigeration unit (37) and the control module (2) are electrically connected; The rapid heating module (7) is installed in the inner cavity of the heat-insulating shell (31) and located on the outside of the reaction vessel (33).

3. The acetoacetanilide refining equipment according to claim 2, characterized in that, The rapid heating module (7) includes: The mounting bracket (71) is installed on the inner wall of the thermal insulation shell (31) in the front-to-back direction; The mounting base (72) is disposed at the rear top of the mounting bracket (71) in the vertical direction; The top plate (73) is disposed at the top of the mounting base (72) and fixedly connected to the inner wall of the mounting bracket (71); A pivot seat (74) is rotatably connected to the top of the outer wall of the mounting base (72) via a bearing, and the top of the pivot seat (74) extends out of the upper surface of the top plate (73); An electric actuator (75) is rotatably connected at one end to the bottom end of the top plate (73) via a rotating seat. The electric actuator (75) is electrically connected to the control module (2). One end of the connecting rod (76) is rotatably connected to the other end of the electric push rod (75) via a pin, and the other end of the connecting rod (76) is rotatably connected to the other end of the electric push rod (75) via a pin.

4. The acetoacetanilide refining equipment according to claim 3, characterized in that, The connecting rod (76) is arc-shaped.

5. The acetoacetanilide refining equipment according to claim 4, characterized in that, The rapid heating module (7) also includes: The limiting slide groove (77) has four sections, which are respectively opened at 90-degree intervals along the circumferential direction from the outside to the inside on the upper surface of the top plate (73); A cross guide rail (78) is keyed to the top of the pivot seat (74); The limiting sliding seat (79) has four positions, and the four limiting sliding seats (79) are respectively sleeved on the four sides of the outer wall of the cross guide rail frame (78); The number of heating components (8) is four, and the four heating components (8) are respectively installed on the top of four limiting sliding seats (79); The number of limit sliders (710) is four, and the four limit sliders (710) are respectively installed at the bottom of the four limit sliding seats (79).

6. The acetoacetanilide refining equipment according to claim 5, characterized in that, The four limiting sliders (710) are respectively adapted to be inserted into the inner cavity of the four limiting grooves (77).

7. The acetoacetanilide refining equipment according to claim 6, characterized in that, The heating assembly (8) includes: The heating component housing (81) is disposed at the top of the limiting slide seat (79) in the vertical direction; A heater (82) is embedded inside the heating assembly housing (81), and the heater (82) is electrically connected to the control module (2); The mounting groove (83) is formed through the outer side of the inner cavity of the heating component housing (81); The sealing plate (84) is two in number, and the two sealing plates (84) are respectively hinged to the left and right sides of the inner cavity of the mounting groove (83); The number of mounting plates (86) is two sets, and the number of micro electric actuators (85) in each set is two. The two micro electric actuators (85) are respectively set on the left and right ends of the inner cavity of the sealing plate (84). The outer sides of the two sets of micro electric actuators (85) are respectively fixedly connected to the inner sides of the left and right sealing plates (84). The micro electric actuators (85) are electrically connected to the control module (2). The mounting plate (86) is disposed in the middle of the inner cavity of the mounting groove (83) in the left-right direction; Auxiliary heating components are provided on both the left and right sides of the inner cavity of the mounting groove (83).

8. The acetoacetanilide refining equipment according to claim 7, characterized in that, The auxiliary heating component includes: The rotating drum (87) is rotatably connected to the inner side of the mounting plate (86) via bearings in the up-down direction; A micro motor (88) is disposed at the top center of the mounting plate (86), and the micro motor (88) is electrically connected to the control module (2); The worm gear (89) is keyed to the outer wall of the rotating drum (87); A worm (810) is screwed to one side of the output end of the micro motor (88), and the worm (810) meshes with a worm wheel (89); The number of movable seats (811) is two, and the two movable seats (811) are respectively inserted into the upper and lower sides of the inner cavity of the rotating cylinder (87); Miniature multi-stage electric actuator (812), the number of miniature multi-stage electric actuator (812) is two, the two miniature multi-stage electric actuators (812) are respectively arranged on the upper and lower sides of the inner cavity of the rotating cylinder (87) along the vertical direction, the telescopic ends of the two miniature multi-stage electric actuators (812) are respectively fixedly connected to the inner side of the moving seat (811), and the miniature multi-stage electric actuator (812) is electrically connected to the control module (2); Limiting rod (813), there are two limiting rods (813), one end of each limiting rod (813) is rotatably connected to the upper and lower sides of the outer wall of the rotating drum (87) by a pin; Rotating rod (814), there are two rotating rods (814), the two rotating rods (814) are respectively rotatably connected to the other end of the upper and lower limiting rods (813) by pins, and one end of the two rotating rods (814) is respectively rotatably connected to the outside of the upper and lower moving seats (811) by pins. The arc-shaped heating plate (815) has two components. The two arc-shaped heating plates (815) are respectively located on the inner side of the other end of the upper and lower rotating rods (814). The arc-shaped heating plate (815) is electrically connected to the control module (2).

9. A refining process for acetoacetanilide, applied in the acetoacetanilide refining equipment as described in claim 8, characterized in that, Includes the following steps: Step 1: Aniline, diketene, ethanol, aqueous solution and catalyst are quantitatively added into the reaction vessel (33) by the feeding module (6) and the injection module (4), respectively; Step 2: Control the extension and retraction of the electric push rod (75) to drive the rotating shaft seat (74) to rotate clockwise or counterclockwise in cooperation with the connecting rod (76). The rotating shaft seat (74) drives the cross guide frame (78) to rotate clockwise or counterclockwise above the top plate (73). The cross guide frame (78) drives the corresponding upper limit sliding seat (79) to move along the outside of the cross guide frame (78). At the same time, the limiting slider (710) moves along the inner cavity of the corresponding upper limit sliding groove (77). The limiting sliding seat (79) drives the heating component (8) at the corresponding position to move inward or outward under the limiting action of the limiting slider (710) so as to achieve rapid separation of the external heat source from the reaction vessel (33). Step 3: Control the micro electric actuator (85) to extend and drive the sealing plate (84) at the corresponding position to rotate outward at the hinge position with the mounting groove (83), causing the sealing plate (84) to release the seal on the inner cavity of the mounting groove (83), and the two micro multi-stage electric actuators (812) to shorten inward to drive the moving seat (811) at the corresponding position to move inward, thereby causing the moving seat (811) to drive the rotating rod (814) to rotate to a horizontal state with the pin joint of the moving seat (811) as the vertex; Step 4: The micro motor (88) in the auxiliary heating components on both sides drives the worm (810) to rotate. The worm wheel (89) drives the rotating drum (87) to rotate under the rotational force of the worm (810). In turn, the rotating drum (87) drives the arc-shaped heating plate (815) to rotate inward under the cooperation of the upper limit rod (813) and the rotating rod (814) at the corresponding position, so that the arc-shaped heating plate (815) is in contact with the outer wall of the reaction vessel (33). Step 5: Heat generated inside the heater (82) and the arc heating plate (815) is passed through the outer wall of the reaction vessel (33) to heat the reaction solution inside the reaction vessel (33) to raise the internal temperature of the reaction vessel (33) to 65 degrees Celsius. The stirring module (34) stirs the solution and catalyst inside the reaction vessel (33) to ensure that the aniline and catalyst inside the solution react fully. Step 6: With the cooperation of the connecting rod (76), the rotating shaft seat (74), the cross guide rail frame (78) and the limiting sliding seat (79), the electric push rod (75) moves the four-sided heating components (8) outward to disengage from the outer wall of the reaction vessel (33), so that it stops heating the inside of the reaction vessel (33). The refrigerator (37) cools the inside of the heat insulation shell (31) by 15 degrees Celsius, and the precision dripping module (5) slowly drips diketene into the inside of the reaction vessel (33) for 0.5 hours. Step 7: Recirculate the reactants for 1 hour, while the four-sided heating components (8) move inward to contact the outer wall of the reaction vessel (33) again for heating, keeping the internal temperature of the reaction vessel (33) at 45 degrees Celsius, and the stirring module (34) stirs the reaction solution inside the reaction vessel (33) for 2 hours. Step 8: After stirring is complete, the four heating components (8) move outward to detach from the outer wall of the reaction vessel (33) so that they stop heating it. The refrigerator (37) cools the inner cavity of the heat-insulating shell (31) so that the internal temperature of the reaction vessel (33) drops rapidly to 2 degrees Celsius within 10 minutes. Step 9: The discharge pump (36) discharges the crystals precipitated inside the reaction tank (33) and obtains the refined finished product by external filtration and drying.

Images