Preparation device of 4-chloromethyl-5-methyl-1, 3-dioxole-2-ketone

Abstract

The utility model provides a 4-chloromethyl-5-methyl-1, 3-dioxole-2-ketone preparation device, which relates to the technical field of 4-chloromethyl-5-methyl-1, 3-dioxole-2-ketone preparation devices, and comprises a preparation table and a gas absorption bottle arranged on one side of the table top of the preparation table, a switch valve penetrating through the surface of the preparation table is mounted at the bottom of the gas absorption bottle, an evaporation box communicated with the switch valve is fixedly mounted at the bottom of the preparation table, a heating plate for solvent evaporation is fixedly mounted in the evaporation box, and the switch valve is connected with the evaporation box, so that saturated solvent evaporation in the gas absorption bottle is realized; and the solvent in the solvent box can be timely supplemented into the gas absorption bottle by utilizing the pump body, so that the solvent in the gas absorption bottle can be automatically supplemented, discharged and evaporated, and the preparation efficiency is conveniently ensured.

Description

Technical Field

[0001] This utility model relates to the field of 4-chloromethyl-5-methyl-1,3-dioxacyclopenten-2-one preparation technology, and in particular to an apparatus for preparing 4-chloromethyl-5-methyl-1,3-dioxacyclopenten-2-one. Background Technology

[0002] 4-Chloromethyl-5-methyl-1,3-dioxacyclopenten-2-one is an organic compound. Its preparation requires specialized equipment, such as a prior art apparatus (publication number CN208378760U). In this apparatus, the second and third inlet ports of a three-necked flask are connected to a gas delivery tube and a constant-pressure dropping funnel via a connecting structure. The gas delivery tube and the constant-pressure dropping funnel are then sealed and reinforced with fastening strips. After this, dichloromethane, p-methylphenyl selenide chloride, and DMDO are added to the three-necked flask through the first inlet port. The reaction mixture is stirred with a magnetic stirrer, and sulfonyl chloride is added dropwise through the constant-pressure dropping funnel. The gas generated during the reaction is introduced into a gas absorption bottle through the gas delivery tube for absorption. After reacting for a certain period based on the amount of reactants added, the solvent is evaporated to obtain the desired synthetic product. The process is simple and convenient.

[0003] However, the raw materials added at the first injection port and the materials added by the constant pressure dropping funnel in this scheme can be automatically controlled by known related equipment, such as pumps and multi-way valves, so that the addition can be carried out for a long time without interruption. However, as the end of the reaction, the gas absorption bottle needs to be replaced by personnel after a period of use. The process of manually replacing the gas absorption bottle will affect the preparation efficiency. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a device for preparing 4-chloromethyl-5-methyl-1,3-dioxane-2-one.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a preparation apparatus for 4-chloromethyl-5-methyl-1,3-dioxane-2-one, comprising a preparation platform and a gas absorption bottle disposed on one side of the preparation platform surface. A switching valve is installed at the bottom of the gas absorption bottle and penetrates the preparation platform surface. An evaporation chamber connected to the switching valve is fixedly installed at the bottom of the preparation platform. A heating plate for solvent evaporation is fixedly installed inside the evaporation chamber. A solvent tank is disposed on one side of the bottom of the preparation platform, and a pump body for connecting the solvent tank and the gas absorption bottle is disposed on the preparation platform surface. A condenser for connecting the evaporation chamber and the solvent tank is disposed at the bottom of the preparation platform.

[0006] Preferably, a connecting pipe is integrally formed on the body of the gas absorption bottle near the bottle opening, and the connecting pipe is connected to the liquid outlet end of the pump body via a flange.

[0007] Preferably, the condenser inlet extends into the evaporator and the condenser outlet extends into the solvent tank.

[0008] Preferably, scrapers are inserted into the two side walls of the evaporator near the top edge, and the bottom edge and two sides of the scrapers are slidably connected to the upper surface of the heating plate and the inner side wall of the evaporator, respectively.

[0009] Preferably, the evaporator is rotatably connected to a lead screw that runs along the length of the heating plate and is threaded through the scraper surface.

[0010] Preferably, a sealing plate is hinged to the upper surface of the heating plate at one end of the lead screw via a torsion spring, a connecting rod is fixedly installed on the swing edge of the upper surface of the sealing plate, and a wedge block is fixedly installed on one side of the scraper to abut against the top of the connecting rod.

[0011] Preferably, an arc-shaped plate is fixedly installed at the bottom of the evaporator below the sealing plate, and the side of the evaporator near the arc-shaped plate is hollowed out below the sealing plate. A solid box is provided at the bottom of the preparation table below the hollowed-out side of the evaporator.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, by setting a switch valve to connect to the evaporation box, the saturated solvent in the gas absorption bottle is evaporated. The pump body can be used to replenish the solvent in the solvent tank into the gas absorption bottle in a timely manner, so as to realize the automatic replenishment, discharge and evaporation of the solvent in the gas absorption bottle, which can help ensure the preparation efficiency.

[0014] 2. In this utility model, by setting a scraper, the solid compound formed by evaporation in the evaporation box can be pushed to the sealing plate by the movement of the scraper, and the heating plate can be opened by the downward swing of the sealing plate, so that the scraped compound can be automatically collected in the solid box. Attached Figure Description

[0015] Figure 1 A three-dimensional structural schematic diagram of a device for preparing 4-chloromethyl-5-methyl-1,3-dioxacyclopenten-2-one is provided for this utility model.

[0016] Figure 2 This invention provides an apparatus for preparing 4-chloromethyl-5-methyl-1,3-dioxacyclopenten-2-one. Figure 1 A schematic diagram of the cross-sectional structure;

[0017] Figure 3This invention provides an apparatus for preparing 4-chloromethyl-5-methyl-1,3-dioxacyclopenten-2-one. Figure 2 A schematic diagram of the overhead section structure;

[0018] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0019] Legend: 1. Preparation platform; 2. Gas absorption bottle; 3. Pump body; 4. Connecting pipe; 5. Solvent tank; 6. Condenser; 7. Evaporator; 8. Heating plate; 9. Scraper; 10. Switch valve; 11. Lead screw; 12. Solid box; 13. Wedge; 14. Arc plate; 15. Connecting rod; 16. Sealing plate. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] like Figures 1-4 As shown, an apparatus for preparing 4-chloromethyl-5-methyl-1,3-dioxane-2-one includes a preparation platform 1 and a gas absorption bottle 2 disposed on one side of the preparation platform 1. The gas absorption bottle 2 is used in conjunction with a three-necked flask (not shown in the figure). The three-necked flask is disposed on the other side of the preparation platform 1, and the relevant structure of the three-necked flask is in accordance with the "three-necked flask" in the prior art described in the background section.

[0023] A switch valve 10 is installed at the bottom of the gas absorption bottle 2, penetrating the surface of the preparation table 1. An evaporation chamber 7, connected to the switch valve 10, is fixedly installed at the bottom of the preparation table 1. When the solvent in the gas absorption bottle 2 reaches its maximum capacity, the switch valve 10 is opened to allow the saturated solvent to flow into the evaporation chamber 7. A heating plate 8 for solvent evaporation is fixedly installed inside the evaporation chamber 7. The solvent entering the evaporation chamber 7 is spread evenly on the heating plate 8. The heating plate 8 uses a metal heat-conducting material and has a built-in electric heating wire. The solvent entering the evaporation chamber 7 is evaporated by heating the heating plate 8. A solvent tank 5 is provided on one side of the bottom of the preparation table 1, and a pump body 3 for connecting the solvent tank 5 and the gas absorption bottle 2 is provided on the surface of the preparation table 1. A connecting pipe 4 is integrally formed near the bottle opening of the gas absorption bottle 2. The liquid outlet of the pump body 3 is connected via a flange. When the solvent in the gas absorption bottle 2 has not completely flowed into the evaporation tank 7, the unsaturated solvent in the solvent tank 5 is injected into the gas absorption bottle 2 at a flow rate greater than that of the switch valve 10. The switch valve 10 is then closed, which allows the solvent in the gas absorption bottle 2 to be replenished in a timely manner without affecting the absorption of the generated gas. A condenser 6 is installed at the bottom of the preparation table 1 to connect the evaporation tank 7 and the solvent tank 5. The steam inlet of the condenser 6 extends into the evaporation tank 7, and the liquid outlet of the condenser 6 extends into the solvent tank 5. The vapor-like solvent generated during the evaporation process in the evaporation tank 7 enters the condenser 6, condenses and liquefies it, and then re-enters the solvent tank 5, which allows the solvent in the solvent tank 5 to be replenished in a timely manner, facilitating the recycling of the solvent and the replacement of the solvent tank 5 by personnel.

[0024] Additionally: Scrapers 9 are inserted into the side walls of the evaporator 7 near the top edge. The bottom edge and sides of the scrapers 9 are slidably connected to the upper surface of the heating plate 8 and the inner wall of the evaporator 7, respectively. A lead screw 11 is rotatably connected inside the evaporator 7 along the length of the heating plate 8 and threaded through the surface of the scrapers 9. In use, the lead screw 11 is driven to rotate by a servo motor installed on the outside of the evaporator 7, which moves the scrapers 9 to scrape off the solid compounds formed on the heating plate 8 after heating and evaporation. A sealing plate 16 is hinged to the upper surface of the heating plate 8 at one end of the lead screw 11 via a torsion spring. The solid compounds reach the sealing plate 16 as the scrapers 9 move. A connecting rod 15 is fixedly installed on the swing edge of the upper surface of the sealing plate 16. A wedge 13 is fixedly installed on one side of the scraper 9, which abuts against the top of the connecting rod 15. The sealing plate 16 is connected by... Because of the spring hinge, the sealing plate 16 normally seals one side of the heating plate 8 to prevent solvent leakage. After the solvent evaporates, when the scraper 9 moves, the inclined edge of the wedge 13 on its surface will contact the top of the connecting rod 15. The inclined edge of the wedge 13 pushes the connecting rod 15 to drive the sealing plate 16 downward to overcome the elastic force of the spring hinge and swing open, so that the compound scraped by the scraper 9 can fall through the opened sealing plate 16. An arc plate 14 is fixedly installed at the bottom of the evaporator 7 below the sealing plate 16. The side of the evaporator 7 near the arc plate 14 is hollowed out below the sealing plate 16. A solid box 12 is set at the bottom of the preparation table 1 below the hollowed-out side of the evaporator 7. The falling compound flows out from the hollowed-out side of the evaporator 7 and falls into the solid box 12 for collection.

[0025] Working principle: After the solvent in the gas absorption bottle 2 is saturated, it flows into the evaporation box 7 through the open switch valve 10. Under the heating action of the heating plate 8, it evaporates. When the solvent in the gas absorption bottle 2 is about to run out, the switch valve 10 is closed, and the solvent in the solvent tank 5 is promptly pumped into the gas absorption bottle 2 to replenish it using the pump body 3. The solvent vapor generated during the evaporation process in the evaporation box 7 is condensed and liquefied by the condenser 6 and then re-enters the solvent tank 5 to wait for reuse. The solvent in the evaporation box 7 is heated and evaporated under the heating action of the heating plate 8 to obtain the desired compound. The generated compound is scraped to the sealing plate 16 by the scraper 9, and the compound flows into the solid box 12 along the arc plate 14 by the downward rotation of the sealing plate 16.

[0026] The wiring diagrams of the condenser 6, pump body 3, servo motor and switching valve 10 in this utility model are common knowledge in the field. Their working principle is a well-known technology. The appropriate model is selected according to actual use. Therefore, the control method and wiring layout of the condenser 6, pump body 3, servo motor and switching valve 10 will not be explained in detail.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An apparatus for preparing 4-chloromethyl-5-methyl-1,3-dioxane-2-one, comprising a preparation platform (1) and a gas absorption bottle (2) disposed on one side of the preparation platform (1), characterized in that: The bottom of the gas absorption bottle (2) is equipped with a switch valve (10) that penetrates the surface of the preparation table (1). The bottom of the preparation table (1) is fixedly equipped with an evaporator (7) that communicates with the switch valve (10). The evaporator (7) is fixedly equipped with a heating plate (8) for solvent evaporation. A solvent tank (5) is provided on one side of the bottom of the preparation table (1), and a pump body (3) for connecting the solvent tank (5) and the gas absorption bottle (2) is provided on the surface of the preparation table (1). A condenser (6) for connecting the evaporator (7) and the solvent tank (5) is provided on the bottom of the preparation table (1).

2. The apparatus for preparing 4-chloromethyl-5-methyl-1,3-dioxane-2-one according to claim 1, characterized in that: The gas absorption bottle (2) has a connecting pipe (4) integrally formed near the bottle mouth, and the connecting pipe (4) is connected to the liquid outlet end of the pump body (3) through a flange.

3. The apparatus for preparing 4-chloromethyl-5-methyl-1,3-dioxacyclopenten-2-one according to claim 1, characterized in that: The steam inlet of the condenser (6) extends into the evaporator (7) and the liquid outlet of the condenser (6) extends into the solvent tank (5).

4. The apparatus for preparing 4-chloromethyl-5-methyl-1,3-dioxacyclopenten-2-one according to claim 1, characterized in that: Scrapers (9) are inserted into the two side walls of the evaporator (7) near the top edge. The bottom edge and the two sides of the scraper (9) are slidably connected to the upper surface of the heating plate (8) and the inner wall of the evaporator (7), respectively.

5. The apparatus for preparing 4-chloromethyl-5-methyl-1,3-dioxane-2-one according to claim 4, characterized in that: The evaporator (7) is rotatably connected to a lead screw (11) that runs along the length of the heating plate (8) and is threaded through the surface of the scraper (9).

6. The apparatus for preparing 4-chloromethyl-5-methyl-1,3-dioxacyclopenten-2-one according to claim 5, characterized in that: The upper surface of the heating plate (8) is connected to a sealing plate (16) via a torsion spring at one end of the lead screw (11). A connecting rod (15) is fixedly installed on the swing side of the upper surface of the sealing plate (16). A wedge (13) that abuts against the top of the connecting rod (15) is fixedly installed on one side of the scraper (9).

7. The apparatus for preparing 4-chloromethyl-5-methyl-1,3-dioxacyclopenten-2-one according to claim 5, characterized in that: An arc-shaped plate (14) is fixedly installed at the bottom of the evaporator (7) below the sealing plate (16). The side of the evaporator (7) near the arc-shaped plate (14) is hollowed out below the sealing plate (16). A solid box (12) is set at the bottom of the preparation platform (1) below the hollowed-out side of the evaporator (7).

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