Production equipment and preparation method of furanone

Abstract

The present invention provides a production device and a preparation method for furanone, including a drying box and a cover plate. A V-shaped sliding groove is provided in the inner cavity of the drying box. Fixed bars are symmetrically installed on both sliding shafts. A drying plate is installed between the two fixed bars. Drying holes are provided at the bottom of the drying plate. Horizontal linear sliding grooves are symmetrically provided on the drying box. A first slider is slidably connected to the horizontal linear sliding groove. A connecting shaft is installed between the two first sliders. A cleaning component for cleaning the drying holes is installed at the top of the connecting shaft. A reciprocating driving mechanism is installed at the bottom of the drying box. When the furanone is dried in the present invention, the reciprocating driving mechanism can drive the drying plate to slide back and forth reciprocally, causing the furanone in the drying plate to vibrate. At the same time, under the limiting action of the V-shaped sliding groove, the drying plate can also slide up and down synchronously, causing the furanone in the drying plate to jump up and down. Then, in cooperation with the drying device in the drying box, the furanone is fully dried, improving the drying efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt extraction, and specifically to a production device and preparation method of furanone. Background Technique

[0002] After furanone is prepared, it needs to be dried to evaporate the residual liquid in the finished furanone, so as to facilitate the storage of furanone. However, when the existing drying equipment is drying, it generally pours the drying raw materials onto the receiving tray and then puts them into the drying room for drying. This drying method is prone to uneven drying, and the furanone at some positions cannot be fully dried. Moreover, the accumulation of materials during drying will also affect the drying efficiency. Therefore, the present invention researches and develops a production device and preparation method of furanone to solve the above technical problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a production device and preparation method of furanone to solve the technical problems raised in the above background technique.

[0004] To achieve the above purpose, the first technical solution provided by the present invention is:

[0005] A production device of furanone, including a drying box, the top of the drying box is provided with a liftable and openable cover plate, and the top of the cover plate is communicated with a telescopic exhaust pipe. Opposite inner side walls of the drying box cavity are symmetrically provided with V-shaped chutes, and the bottom of the V-shaped chutes is provided with a horizontal section. Two V-shaped chutes are symmetrically slidably connected with sliding shafts. One ends of the two sliding shafts close to each other are symmetrically installed with fixing bars. A drying plate with a concave bottom is installed between the two fixing bars, and the drying plate is located above the V-shaped chutes. A plurality of drying holes are opened at the bottom of the drying plate. Opposite side walls of the drying box are symmetrically provided with horizontal linear chutes, and the horizontal linear chutes are located between the V-shaped chutes and the drying plate. The horizontal linear chutes are slidably connected with first sliders. One ends of the two first sliders close to each other are installed with a connecting shaft, and the connecting shaft passes through the two fixing bars and is slidably connected with the fixing bars. A cleaning component for cleaning the drying holes is installed at the top of the connecting shaft. When the sliding shaft slides to the horizontal section of the V-shaped chute, the top of the cleaning component penetrates out of the drying hole. When the sliding shaft slides to the inclined sections on both sides of the V-shaped chute, the cleaning component disengages from the drying hole. A reciprocating driving mechanism is installed at the bottom of the drying box, and the reciprocating driving mechanism is connected with the cleaning component and drives the cleaning component and the connecting shaft to slide back and forth along the horizontal linear chute.

[0006] Preferably, the cleaning component includes a plurality of fixing rods connected with the connecting shaft. The top of the fixing rods is fixedly connected with cleaning needles corresponding to the drying holes. At both ends of the bottom between the plurality of fixing rods, connecting rods are symmetrically installed, and the connecting rods are connected with the reciprocating driving mechanism.

[0007] Preferably, the drying holes are arranged in a rectangular array, the connecting shaft is a reciprocating screw, the connecting rod is slidably connected to the reciprocating driving mechanism, a threaded sleeve is threadedly connected to the outer wall of the connecting shaft, the fixing rod is fixedly connected to the threaded sleeve, symmetrically fixed on the opposite inner side walls of the inner cavity of the drying box are horizontally arranged racks, and the racks are located above one end of the horizontal linear sliding groove, and a rotating gear meshing with the rack is installed on the outer wall of the connecting shaft through a one-way bearing.

[0008] Preferably, the fixing strip is provided with a limiting groove through it, a second slider is slidably connected between the inner walls of the limiting groove, and the connecting shaft is rotatably connected to the second slider.

[0009] Preferably, the reciprocating driving mechanism includes a driving motor installed at the bottom of the drying box and sliding rods respectively slidably connected to the two connecting rods, the output end of the driving motor passes through the bottom of the drying box and is installed with a turntable, a pin shaft is installed on the top of the turntable, between the mutually close ends of the two sliding rods is installed a sliding strip cooperating with the pin shaft, and the sliding strip is provided with a strip-shaped groove cooperating with the pin shaft.

[0010] Preferably, an exhaust fan is fixedly connected to the outer wall of the output end of the driving motor, and the exhaust fan is located below the turntable, and a disk-shaped heating tube is installed between the inner side walls of the inner cavity of the drying box, and the disk-shaped heating tube is located between the exhaust fan and the turntable.

[0011] Preferably, the fixing strip and the drying plate are detachably connected, symmetrically fixed on the mutually close side faces of the two fixing strips are bearing plates, and the drying plate is placed across the two bearing plates, the top of the fixing strip is recessed inward to form a plug-in groove, slidably installed along the height direction on the side face of the plug-in groove close to the drying plate is an elastic positioning pin, the side wall of the drying plate is provided with a positioning hole cooperating with the elastic positioning pin, inserted inside the plug-in groove is an extrusion strip for ejecting the elastic positioning pin and inserting it into the positioning hole, and the top of the extrusion strip passes through the plug-in groove.

[0012] Preferably, the elastic positioning pin includes a positioning pin, a positioning block is installed at one end of the positioning pin located inside the plug-in groove, a spring is sleeved on the outer wall of the positioning pin, and the spring is located between the positioning block and the inner wall of the plug-in groove, and mutually cooperating inclined surfaces are arranged on the mutually close side faces of the positioning block and the bottom of the extrusion strip.

[0013] Preferably, the side wall of the drying plate is provided with a positioning groove cooperating with the fixing strip.

[0014] The second technical solution provided by the present invention is as follows:

[0015] A preparation method of furanone, comprising the following steps:

[0016] S1. Preparation of adipoyl solution: Quantitatively add methylglyoxal and acetic acid to a reaction kettle and stir to mix. After mixing, quantitatively add zinc powder to the reaction flask and stir to dissolve while adding. During the addition process, maintain the temperature of the reaction flask within the range of 25 - 40 °C. After the addition and dissolution are completed, obtain the intermediate product adipoyl solution;

[0017] S2. Purification of adipoyl: Add sodium sulfate to the adipoyl solution prepared in step S1, perform centrifugal separation. The separated liquid phase is added with ethyl acetate extractant for extraction. The extraction is carried out in an extraction device to obtain an extraction solution. Subsequently, the extraction solution is introduced into an evaporation and concentration device for evaporation and concentration of the oil phase, recovering ethyl acetate and distilled water to obtain an extraction concentrate; After the concentrate is subjected to freeze crystallization, centrifugal separation is carried out to obtain an adipoyl mother liquor and purified adipoyl;

[0018] S3. Preparation of furanone semi-finished product: Add the purified adipoyl to a sodium dihydrogen phosphate solution, stir to mix and dissolve, and add acetic acid to adjust the pH value of the solution. Then, after the cyclization reaction is complete, let it stand and cool at room temperature for a period of time, and separate the oil phase and the water phase; The oil phase is concentrated by an evaporation and concentration device to recover butyl acetate to obtain a liquid-phase furanone semi-finished product;

[0019] S4. Preparation of finished furanone: The liquid-phase furanone semi-finished product is subjected to freeze crystallization and centrifugal separation to obtain crude furanone. After the crude furanone is successively subjected to refined purification and drying, finished furanone is obtained, and the drying is carried out using the production equipment in the first solution.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. When the present invention conducts drying treatment on furanone, the reciprocating driving mechanism can drive the drying plate to slide back and forth reciprocally, causing the furanone in the drying plate to vibrate. At the same time, under the limiting action of the V-shaped chute, the drying plate can also slide up and down synchronously, causing the furanone in the drying plate to jump up and down. Then, in combination with the drying device in the drying box, full drying treatment is carried out on furanone, improving the drying efficiency.

[0022] 2. When the drying plate moves from the inclined section to the horizontal section of the V-shaped chute, its height gradually decreases, enabling the cleaning component to gradually insert into the drying holes and push out the blocked materials in the drying holes. In this way, the drying holes of the drying plate are cleaned intermittently and reciprocally, avoiding blockage of the drying holes and affecting the drying efficiency and drying effect. Description of the Drawings

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0024] Figure 1 Structural schematic diagram of the production equipment of the present invention;

[0025] Figure 2 Front sectional structural schematic diagram of the production equipment of the present invention;

[0026] Figure 3 Front sectional structural schematic diagram of the drying oven in the production equipment of the present invention;

[0027] Figure 4 Structural schematic diagram of the drying plate and its connecting components in the production equipment of the present invention;

[0028] Figure 5 Side sectional structural schematic diagram of the drying plate and its connecting components in the production equipment of the present invention;

[0029] Figure 6 For Figure 5 Enlarged structural schematic diagram of part A in;

[0030] Figure 7 First-angle structural schematic diagram of the cleaning component in the production equipment of the present invention;

[0031] Figure 8 Second-angle structural schematic diagram of the cleaning component in the production equipment of the present invention;

[0032] Figure 9 Structural schematic diagram of the driving mechanism in the production equipment of the present invention;

[0033] Figure 10 Exploded structural schematic diagram of the drying oven and the fixing strip in the production equipment of the present invention;

[0034] Figure 11 Structural cross-sectional view between the elastic positioning pin and the fixing strip in the production equipment of the present invention.

[0035] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0036] 1. Drying oven; 2. Cover plate; 3. Exhaust pipe; 4. V-shaped chute; 5. Sliding shaft; 6. Fixed strip; 61. Limit groove; 62. Second slider; 63. Bearing plate; 64. Insertion groove; 65. Elastic positioning pin; 651. Positioning pin; 652. Positioning block; 653. Spring; 66. Extrusion strip; 7. Drying plate; 71. Positioning hole; 72. Positioning groove; 8. Drying hole; 9. Horizontal linear chute; 10. First slider; 11. Connecting shaft; 111. Threaded sleeve; 112. Rotating gear; 12. Cleaning assembly; 121. Fixed rod; 122. Cleaning needle; 123. Connecting rod; 13. Reciprocating driving mechanism; 131. Driving motor; 132. Sliding rod; 133. Turntable; 134. Pin shaft; 135. Sliding strip; 136. Strip-shaped groove; 137. Exhaust fan; 14. Rack; 15. Disk heating tube. Detailed implementation mode

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0038] As Figures 1-11 shown: Embodiment 1 of the present invention is as follows:

[0039] A production device for furanone, including a drying oven 1, a cover plate 2 that can be lifted and opened is provided at the top of the drying oven 1, and a telescopic exhaust pipe 3 is connected to the top of the cover plate 2. V-shaped chutes 4 are symmetrically opened on the opposite inner side walls of the inner cavity of the drying oven 1, and a horizontal section is provided at the bottom of the V-shaped chutes 4. Two V-shaped chutes 4 are symmetrically slidably connected to a sliding shaft 5. Fixing strips 6 are symmetrically installed at the mutually approaching ends of the two sliding shafts 5. A drying plate 7 with a concave bottom is installed between the two fixing strips 6, and the drying plate 7 is located above the V-shaped chutes 4. A plurality of drying holes 8 are opened at the bottom of the drying plate 7. Horizontal linear chutes 9 are symmetrically opened on the opposite side walls of the drying oven 1, and the horizontal linear chutes 9 are located between the V-shaped chutes 4 and the drying plate 7. A first slider 10 is slidably connected to the horizontal linear chutes 9. A connecting shaft 11 is installed between the mutually approaching ends of the two first sliders 10, and the connecting shaft 11 passes through the two fixing strips 6 and is slidably connected to the fixing strips 6. A cleaning assembly 12 for cleaning the drying holes 8 is installed at the top of the connecting shaft 11. When the sliding shaft 5 slides to the horizontal section of the V-shaped chute 4, the top of the cleaning assembly 12 penetrates out of the drying holes 8. When the sliding shaft 5 slides to the inclined sections on both sides of the V-shaped chute 4, the cleaning assembly 12 disengages from the drying holes 8. A reciprocating driving mechanism 13 is installed at the bottom of the drying oven 1, and the reciprocating driving mechanism 13 is connected to the cleaning assembly 12 and drives the cleaning assembly 12 and the connecting shaft 11 to slide back and forth along the horizontal linear chutes 9.

[0040] In this embodiment, the cleaning component 12 includes several fixed rods 121 connected to the connecting shaft 11. A cleaning needle 122 corresponding to the drying holes 8 is fixedly connected to the top of the fixed rod 121. At both ends of the bottom between the several fixed rods 121, connecting rods 123 are symmetrically installed, and the connecting rods 123 are connected to the reciprocating driving mechanism 13.

[0041] In this embodiment, in order to avoid excessive number of cleaning needles causing difficulty in cleaning the interior of the device, the drying holes 8 are arranged in a rectangular array. The connecting shaft 11 is a reciprocating screw. The connecting rod 123 is slidably connected to the reciprocating driving mechanism 13. A threaded sleeve 111 is threadedly connected to the outer wall of the connecting shaft 11. The fixed rod 121 is fixedly connected to the threaded sleeve 111. On the opposite inner side walls of the drying box 1, horizontal racks 14 are symmetrically and fixedly connected, and the racks 14 are located above one end of the horizontal linear sliding groove 9. A rotating gear 112 meshing with the rack 14 is installed on the outer wall of the connecting shaft 11 through a one-way bearing. When the connecting shaft reciprocates under the drive of the reciprocating driving mechanism, when the rotating gear meshes with the rack in the forward direction, the rack can drive the rotating gear and the connecting shaft to rotate, so that the threaded sleeve, the fixed rod, and the cleaning needle slide, enabling the cleaning needle to clean the next column of drying holes. In this way, the drying holes arranged in a rectangular array are cleaned column by column. In this embodiment, the number of fixed rods can be half of the number of columns of the drying holes 8 arranged in a rectangular array and arranged at intervals. For example, if the drying holes are arranged in 8 columns, 4 fixed rods are arranged and arranged at intervals of one column of drying holes, so that when the rack drives the rotating gear to rotate once, the fixed rod is driven to slide to the position of the next column of drying holes.

[0042] In this embodiment, in order to enable the fixing strip to rotate and slide relative to the connecting shaft, a limiting groove 61 is formed through the fixing strip 6. A second slider 62 is slidably connected between the inner walls of the limiting groove 61, and the connecting shaft 11 is rotatably connected to the second slider 62. The second slider can slide up and down along the limiting groove, and the connecting shaft and the second slider are rotatably connected through a rotating bearing.

[0043] In this embodiment, in order to enable the drying plate to slide back and forth, the reciprocating driving mechanism 13 includes a driving motor 131 installed at the bottom of the drying box 1 and sliding rods 132 respectively slidably connected to the two connecting rods 123. The output end of the driving motor 131 passes through the bottom of the drying box 1 and is installed with a turntable 133. A pin shaft 134 is installed on the top of the turntable 133. A sliding strip 135 cooperating with the pin shaft 134 is installed between the mutually approaching ends of the two sliding rods 132. A strip-shaped groove 136 cooperating with the pin shaft 134 is formed in the sliding strip 135. When the driving motor rotates, it can drive the turntable and the pin shaft to rotate, thereby driving the sliding strip and the sliding rod to slide back and forth through the pin shaft, and further driving the drying plate to slide back and forth through the sliding rod.

[0044] In this embodiment, in order to make full use of the driving force of the driving motor, an exhaust fan 137 is fixedly connected to the outer wall of the output end of the driving motor 131, and the exhaust fan 137 is located below the turntable 133. A disk-shaped heating pipe 15 is installed between the inner cavity side walls of the drying box 1, and the disk-shaped heating pipe 15 is located between the exhaust fan 137 and the turntable 133. When the driving motor rotates, it can also drive the exhaust fan to rotate and exhaust air towards the exhaust pipe, forming air circulation, and blowing the heat generated by the disk-shaped heating pipe towards the drying plate to dry the material.

[0045] In this embodiment, in order to facilitate the taking and placing of the drying plate and thus facilitate the collection of materials, the fixing strip 6 and the drying plate 7 are detachably connected. On the symmetrically fixedly connected bearing plates 63 on the mutually close side surfaces of the two fixing strips 6, the drying plate 7 is placed across. A plugging groove 64 is formed by the inward depression of the top of the fixing strip 6. An elastic positioning pin 65 is slidably installed through the side surface of the plugging groove 64 close to the drying plate 7 along the height direction. A positioning hole 71 that cooperates with the elastic positioning pin 65 is formed on the side wall of the drying plate 7. An extrusion strip 66 for ejecting the elastic positioning pin 65 and inserting it into the positioning hole 71 is inserted into the plugging groove 64, and the top of the extrusion strip 66 penetrates out of the plugging groove 64. When drying is to be carried out, after pouring the material into the drying plate, the drying plate is placed across on the two bearing plates. After positioning the position of the drying box, then the extrusion strip is inserted into the plugging groove, and the elastic positioning pin is extruded by the extrusion strip and inserted into the positioning hole to complete the fixation of the drying plate. When the drying plate needs to be taken out, only the extrusion strip needs to be pulled out, and the elastic positioning pin returns to its original position under the action of the restoring force and disengages from the drying plate, and then the drying plate can be taken out.

[0046] In this embodiment, the elastic positioning pin 65 includes a positioning pin 651. A positioning block 652 is installed at one end of the positioning pin 651 located inside the plugging groove 64. A spring 653 is sleeved on the outer wall of the positioning pin 651, and the spring 653 is located between the positioning block 652 and the inner wall of the plugging groove 64. A mutually cooperating inclined surface is provided on the mutually close side surfaces of the positioning block 652 and the bottom of the extrusion strip 66. When the positioning pin penetrates out, the spring can generate deformation and store energy through the extrusion of the positioning block, and starts to recover after losing the external acting force, so that the positioning pin disengages from the positioning hole.

[0047] In this embodiment, in order to further position the installation position of the drying plate, a positioning groove 72 that cooperates with the fixing strip 6 is formed on the side wall of the drying plate 7. When the drying plate is placed, it can be aligned with the fixing strip and then placed, so as to realize the horizontal position positioning of the drying plate.

[0048] The specific drying working process of the above production device is as follows:

[0049] The furanone to be dried is poured into the drying plate 7 and spread flat, and then the drying plate 7 is placed and fixed on the fixing bar 6. The specific process is: first, the positioning grooves 72 on both sides of the drying plate 7 are aligned with the fixing bar 6 and the drying plate 7 is put down, so that the drying plate 7 is placed across the receiving plates 63 on both sides, and then the extrusion bar 66 is inserted from the top of the plug-in groove 64. The extrusion bar 66 sequentially extrude and insert the positioning pins 651 of different heights into the positioning holes 71 to complete the fixing of the drying plate 7.

[0050] Then the cover plate 2 is lowered and placed on the top of the drying box 1 (it can be driven by a lifting cylinder) to form a closed space, and then the driving motor 131 and the disc heating tube 15 are started respectively, and the driving motor 131 drives the exhaust fan 137 and the turntable 133 to rotate respectively, wherein the exhaust fan 137 rotates to transport the heat generated by the disc heating tube 15 to the drying plate 7 and through the drying hole 8 for drying, and the turntable 133 rotates to drive the pin 134 to rotate, so that the sliding bar 135 and the two sliding rods 132 slide back and forth, and the sliding rod 132 drives the fixed rod 112, the threaded sleeve 111, the connecting shaft 11, the fixed bar 6 and the drying plate 7 to slide back and forth, so that the material inside the drying plate 7 is shaken back and forth, thereby achieving shaking and drying, and avoiding material accumulation and affecting the drying efficiency;

[0051] At the same time, when the fixed bar 6 and the drying plate 7 slide, due to the mutual cooperation between the sliding shaft 5 and the V-shaped groove 4, the drying plate 7 can slide up and down while sliding back and forth, so that the material inside the drying plate 7 jumps up and down, further improving the drying efficiency, and when the sliding shaft 5 moves downward along the inclined section of the V-shaped groove 4, the height of the drying plate 7 can be gradually reduced, so that the cleaning needle 122 can be gradually inserted into the drying hole 8 (due to the synchronous sliding between the connecting shaft 11 and the drying plate 7, the cleaning needle 122 can also keep sliding synchronously with the drying plate 7), and the material blocked in the drying hole 8 is pushed out of the drying hole 8, so as to avoid the drying hole 8 being blocked and affecting the circulation of hot air, and when the sliding shaft 5 slides upward along the inclined section of the V-shaped groove 4, the height of the drying plate 7 gradually increases, and the cleaning needle 122 gradually separates from the drying plate 7.

[0052] When the drying plate 7 slides back and forth to one side of the V-shaped chute 4 (at this time, the cleaning needle 122 is separated from the drying hole 8), the rotating gear 112 gradually meshes with the rack 14, driving the rotating gear 112 and the connecting shaft 11 to rotate, thereby driving the threaded sleeve 111, the fixed rod 121, and the cleaning needle 122 to slide a certain distance. Then, the drying plate 7 continues to slide back. Since the rotating gear 112 and the connecting shaft 11 are connected by a one-way bearing, the rotating gear 112 will idle at this time. Then, the drying plate 7 gradually slides to the horizontal section of the V-shaped chute 4, so that the cleaning needle 122 is inserted into the drying holes 8 at different positions again and cleaned. In this way, the drying holes 8 of the drying plate 7 are continuously processed to avoid the phenomenon of blockage of the drying holes 8.

[0053] After drying is completed, the cover plate 2 is opened, and then the extrusion strip 66 on the plug-in groove 64 is taken out, so that the positioning pin 651 returns to its original position under the restoring force of the spring 653 and disengages from the positioning hole 71. Then, the drying plate 7 is taken out for material collection, and the drying treatment of furanone is completed.

[0054] Please refer to Figures 1-11 As shown in

[0055] A preparation method of furanone includes the following steps:

[0056] S1. Prepare adipic ketone solution: Add a certain amount of methylglyoxal and acetic acid to the reaction kettle in sequence and stir and mix. After mixing, add a certain amount of zinc powder to the reaction flask, and stir and dissolve while adding. At the same time, maintain the temperature of the reaction flask within the range of 30 °C during the addition process. After the addition and dissolution are completed, obtain the intermediate product adipic ketone solution;

[0057] And the specific process of adding zinc powder is as follows: After methylglyoxal and acetic acid are stirred and mixed for 15 min, add 1 / 3 amount of zinc powder and stir and mix until completely dissolved, then let stand for 8 min. Add another 1 / 3 amount of zinc powder and stir and mix until completely dissolved, then let stand for 10 min. Finally, add the remaining 1 / 3 amount of zinc powder, stir and mix until completely dissolved. At the same time, the temperature can be controlled by a water bath during the addition process of zinc powder;

[0058] S2. Purify adipic ketone: Add sodium sulfate to the adipic ketone solution prepared in step S1, and perform centrifugal separation. The separated liquid phase is added with ethyl acetate extractant for extraction. The extraction is carried out in an extraction device to obtain an extraction solution. Then, the extraction solution is introduced into the evaporation concentration device 1 for oil phase evaporation concentration to recover ethyl acetate and distilled water, and obtain an extraction concentrate; After the concentrate is subjected to freeze crystallization, centrifugal separation is carried out to obtain adipic ketone mother liquor and purified adipic ketone;

[0059] S3. Preparation of furanone semi-finished product: Add the purified adipodione into the sodium dihydrogen phosphate solution, stir and mix to dissolve, add acetic acid to adjust the pH value of the solution, and then after the cyclization reaction is complete, let it stand and cool at room temperature for a period of time, and separate the oil phase and the water phase; and concentrate and recover butyl acetate from the oil phase through the evaporation concentration device 1 to obtain the liquid-phase furanone semi-finished product;

[0060] S4. Preparation of finished furanone: Freeze-crystallize the liquid-phase furanone semi-finished product and centrifuge to separate to obtain crude furanone, and after refining and purifying the crude furanone, obtain the finished furanone;

[0061] Among them, the method for refining and purifying the crude furanone is specifically as follows: Put the crude furanone particles into the extraction kettle, cool CO2 and pressurize it to a predetermined pressure by a high-pressure pump, and set the extraction pressure of the extraction device, and separate through the extraction device to obtain refined furanone I. Then dissolve the refined furanone I with an ethanol-acetone mixture and crystallize and purify it, and then dry it using the production equipment in Example 1 to obtain the refined furanone.

[0062] In this embodiment, the structures and principles of the reaction kettle, centrifuge, extraction device, and cyclization reaction kettle can all adopt the same equipment in the existing preparation methods, and will not be described in detail in this embodiment.

[0063] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "setting", "connection", "fixation", "swivel connection" and the like shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that these embodiments can be modified without departing from the principles and spirits of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A furanone production device, comprising a drying box (1), wherein the top of the drying box (1) is provided with a cover plate (2) that can be raised and lowered, and the top of the cover plate (2) is connected to a telescopic exhaust pipe (3), characterized in that: The drying box (1) has two opposite side walls of the inner cavity symmetrically provided with V-shaped slide grooves (4), and the bottom of the V-shaped slide grooves (4) is provided with a horizontal section, two of the V-shaped slide grooves (4) are symmetrically slidably connected with sliding shafts (5), and the two sliding shafts (5) are symmetrically installed with fixing bars (6) at one end close to each other, and a drying plate (7) with a bottom recessed inwardly is installed between the two fixing bars (6), and the drying plate (7) is located above the V-shaped slide grooves (4), and a plurality of drying holes (8) are provided at the bottom of the drying plate (7), and the two opposite side walls of the drying box (1) are symmetrically provided with horizontal linear slide grooves (9), and the horizontal linear slide grooves (9) are located between the V-shaped slide grooves (4) and the drying plate (7), and the horizontal linear slide grooves (9) are slidably connected with a first sliding block (10), and the two first A connecting shaft (11) is installed between the ends of the sliders (10) that are close to each other, and the connecting shaft (11) passes through the two fixing bars (6) and is slidably connected to the fixing bars (6). A cleaning component (12) for cleaning the drying hole (8) is installed on the top of the connecting shaft (11). When the sliding shaft (5) slides to the horizontal section of the V-shaped slide groove (4), the top of the cleaning component (12) passes through the drying hole (8). When the sliding shaft (5) slides to the inclined sections on both sides of the V-shaped slide groove (4), the cleaning component (12) is separated from the drying hole (8). A reciprocating drive mechanism (13) is installed at the bottom of the drying box (1), and the reciprocating drive mechanism (13) is connected to the cleaning component (12) and drives the cleaning component (12) and the connecting shaft (11) to slide back and forth along the horizontal linear slide groove (9). The cleaning assembly (12) comprises a plurality of fixed rods (121) connected to the connecting shaft (11); a cleaning needle (122) arranged corresponding to the drying hole (8) is fixedly connected to the top of the fixed rod (121); connecting rods (123) are symmetrically installed at both ends of the bottom between the plurality of fixed rods (121); and the connecting rods (123) are connected to the reciprocating drive mechanism (13); The drying holes (8) are arranged in a rectangular array, the connecting shaft (11) is a reciprocating screw, the connecting rod (123) is slidably connected to the reciprocating drive mechanism (13), the outer wall of the connecting shaft (11) is threadedly connected to a threaded sleeve (111), the fixing rod (121) is fixedly connected to the threaded sleeve (111), the inner cavity walls of the drying box (1) are symmetrically fixed with horizontally arranged racks (14), and the racks (14) are located above one end of the horizontal linear slide groove (9), and the outer wall of the connecting shaft (11) is provided with a rotating gear (112) meshingly connected to the rack (14) via a one-way bearing; The fixing bar (6) is penetrated by a limiting groove (61), a second sliding block (62) is slidably connected between the inner walls of the limiting groove (61), and the connecting shaft (11) is rotationally connected to the second sliding block (62).

2. A furanone production equipment according to claim 1, characterized in that: The reciprocating drive mechanism (13) comprises a drive motor (131) mounted on the bottom of the drying box (1) and sliding rods (132) respectively connected in a sliding manner to two connecting rods (123); an output end of the drive motor (131) passes through the bottom of the drying box (1) and is mounted with a turntable (133); a pin (134) is mounted on the top of the turntable (133); a sliding bar (135) cooperating with the pin (134) is mounted between the ends of the two sliding rods (132) that are close to each other; and the sliding bar (135) is provided with a strip groove (136) cooperating with the pin (134).

3. A furanone production equipment according to claim 2, characterized in that: An exhaust fan (137) is fixedly connected to the outer wall of the output end of the drive motor (131), and the exhaust fan (137) is located below the turntable (133). A disc-type heating tube (15) is installed between the side walls of the inner cavity of the drying box (1), and the disc-type heating tube (15) is located between the exhaust fan (137) and the turntable (133).

4. A furanone production equipment according to claim 1, characterized in that: The fixing strip (6) and the drying plate (7) are detachably connected, and a receiving plate (63) is symmetrically fixedly connected to a side surface of the two fixing strips (6) close to each other, and the drying plate (7) is placed across the two receiving plates (63). The top of the fixing strip (6) is recessed inward to form a plug-in groove (64), and an elastic positioning pin (65) is slidably installed through the side surface of the plug-in groove (64) close to the drying plate (7) along the height direction. A positioning hole (71) that cooperates with the elastic positioning pin (65) is opened on the side wall of the drying plate (7), and an extrusion strip (66) for pushing out the elastic positioning pin (65) and inserting it into the positioning hole (71) is inserted into the plug-in groove (64), and the top of the extrusion strip (66) passes through the plug-in groove (64).

5. A furanone production equipment according to claim 4, characterized in that: The elastic positioning pin (65) comprises a positioning pin (651), one end of the positioning pin (651) located inside the plug-in slot (64) is provided with a positioning block (652), the outer wall of the positioning pin (651) is sleeved with a spring (653), and the spring (653) is located between the positioning block (652) and the inner wall of the plug-in slot (64), and a side surface of the positioning block (652) and the bottom of the extrusion strip (66) close to each other is provided with mutually matching inclined surfaces.

6. A furanone production equipment according to claim 4, characterized in that: The side wall of the drying plate (7) is provided with a positioning groove (72) that cooperates with the fixing strip (6).

Images