Preparation device suitable for N, N-dimethyl trifluoromethanesulfonamide

Abstract

The utility model discloses a preparation device suitable for N, N-dimethyl trifluoromethanesulfonamide, which comprises a dynamic tubular reactor, a stirring screw is arranged in the dynamic tubular reactor, and the dynamic tubular reactor is sequentially divided into a cooling section, a heat preservation section and a heating section from the input end of the dynamic tubular reactor to the output end of the dynamic tubular reactor. A cooling jacket is arranged on the dynamic tubular reactor of the cooling section; the output end of the dynamic tubular reactor is connected with a centrifugal extraction mechanism; the centrifugal extraction mechanism comprises at least two stages of centrifugal extractors which are connected in series; the input end of the dynamic tubular reactor is connected with a liquid trifluoromethanesulfonyl fluoride supply mechanism for conveying liquid trifluoromethanesulfonyl fluoride and a liquid dimethylamine supply mechanism for providing liquid dimethylamine. The N, N-dimethyl trifluoromethanesulfonamide preparation device has the advantages of being simple in structure and suitable for preparing N, N-dimethyl trifluoromethanesulfonamide.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical synthesis equipment, in particular to a preparation device for N,N-dimethyltrifluoromethanesulfonamide. Background Art

[0002] The preparation of N,N-dimethyltrifluoromethanesulfonamide is currently usually only carried out on a small scale in the laboratory, and there is no equipment suitable for the industrial production of N,N-dimethyltrifluoromethanesulfonamide.

[0003] Currently, traditional preparation processes mainly include the following three methods: the first method involves the reaction of trifluoromethanesulfonyl fluoride with dimethylamine (liquid dimethylamine or an aqueous solution of dimethylamine), using dimethylamine or triethylamine as an acid-binding agent (CN1289765, Russ. J. Gen. Chem., 2009, 79, 315, CN113801040, CN115703722). The post-processing process requires the use of highly hazardous ether as an extractant or the additional use of alcohols as solvents and the use of sodium alkoxide to regenerate dimethylamine.

[0004] The second method is to react trifluoromethanesulfonyl chloride with dimethylamine (liquid dimethylamine or an organic solution of dimethylamine), using dimethylamine or triethylamine as an acid-binding agent (Chem, 2019, 5, 2630, J. Fluorine Chem., 2013, 147, 56, US2023174469, CN118354997);

[0005] The third method is the N-methylation reaction of trifluoromethanesulfonamide with iodomethane ( J. Fluorine Chem. , 2010,131, 761).

[0006] All three of the aforementioned preparation methods have the following drawbacks: 1. They are generally only suitable for laboratory preparation and cannot be scaled up for large-scale production. 2. They all require the use of additional reagents, such as extractants and organic solvents. The use of these solvents not only increases production costs but also limits the product purity to a maximum of 99.0%, rather than 99.9%, making it unsuitable for direct use as an electrolyte additive.

[0007] In order to be suitable for industrial production and to further improve the purity of the product so that the product can be used directly as an additive, the applicant has developed a preparation device suitable for N,N-dimethyltrifluoromethanesulfonamide. Utility Model Content

[0008] The technical problem to be solved by the utility model is to provide a preparation device suitable for N,N-dimethyltrifluoromethanesulfonamide, which can effectively improve the conversion rate, yield and product purity and is suitable for industrial production.

[0009] In order to solve the above problems, the technical solution adopted by the utility model is: a preparation device for N,N-dimethyltrifluoromethanesulfonamide, comprising a dynamic tubular reactor, wherein the two ends of the dynamic tubular reactor are respectively a dynamic tubular reactor input end and a dynamic tubular reactor output end, and a stirring screw is provided in the dynamic tubular reactor for transporting the reaction materials from the dynamic tubular reactor input end to the dynamic tubular reactor output end. The dynamic tubular reactor is divided into a cooling section, a heat preservation section, and a heating section from the dynamic tubular reactor input end to the dynamic tubular reactor output end. The cooling section is a heat preservation section, a heat preservation section, and a heating section. The dynamic tubular reactor of the heat preservation section is provided with a cooling jacket for introducing a coolant; the outer wall of the dynamic tubular reactor of the heat preservation section is provided with a heat preservation layer; the dynamic tubular reactor of the heating section is provided with a heating jacket for introducing a heating agent; the output end of the dynamic tubular reactor is connected to a centrifugal extraction mechanism, which includes at least two stages of centrifugal extractors arranged in series; the input end of the dynamic tubular reactor is connected to a liquid trifluoromethanesulfonyl fluoride supply mechanism for providing liquid trifluoromethanesulfonyl fluoride, and a liquid dimethylamine supply mechanism for providing liquid dimethylamine.

[0010] Furthermore, the aforementioned preparation device for N,N-dimethyltrifluoromethanesulfonamide, wherein the liquid trifluoromethanesulfonyl fluoride supply mechanism includes: a trifluoromethanesulfonyl fluoride storage tank with a first pressure gauge arranged in a cooling device, the trifluoromethanesulfonyl fluoride in the trifluoromethanesulfonyl fluoride storage tank is in liquid form under the cooling action of the cooling device, a first output pipe is provided in the trifluoromethanesulfonyl fluoride storage tank, the lower end of the first output pipe extends to the bottom of the trifluoromethanesulfonyl fluoride storage tank, the upper end of the first output pipe is connected to a trifluoromethanesulfonyl fluoride delivery pipe coated with a thermal insulation material, the trifluoromethanesulfonyl fluoride delivery pipe is connected to the input end of the dynamic tubular reactor, and under the action of the liquid trifluoromethanesulfonyl fluoride delivery power mechanism, the liquid trifluoromethanesulfonyl fluoride is sequentially delivered to the input end of the dynamic tubular reactor through the first output pipe and the trifluoromethanesulfonyl fluoride delivery pipe.

[0011] Furthermore, in the aforementioned preparation device for N,N-dimethyltrifluoromethanesulfonamide, a first back pressure valve, a first mass flow meter, and a first one-way valve are sequentially provided on the trifluoromethanesulfonyl fluoride delivery pipe along the delivery direction of trifluoromethanesulfonyl fluoride.

[0012] Furthermore, the aforementioned device for preparing N,N-dimethyltrifluoromethanesulfonamide is characterized in that: the liquid dimethylamine supply mechanism includes: a dimethylamine storage tank with a second pressure gauge arranged in a cooling device, the dimethylamine in the dimethylamine storage tank is in liquid state under the cooling effect of the cooling device, a second output pipe is provided in the dimethylamine storage tank, the lower end of the second output pipe extends to the bottom of the dimethylamine storage tank, the upper end of the second output pipe is connected to a dimethylamine delivery pipe coated with a thermal insulation material, and the dimethylamine delivery pipe is connected to the input end of the dynamic tubular reactor; under the action of the liquid dimethylamine delivery power mechanism, the liquid dimethylamine is sequentially delivered to the dynamic tubular reactor through the second output pipe and the dimethylamine delivery pipe.

[0013] Furthermore, in the aforementioned preparation device for N,N-dimethyltrifluoromethanesulfonamide, a second back pressure valve, a second mass flow meter, and a second one-way valve are sequentially provided on the dimethylamine delivery pipe along the delivery direction of the liquid dimethylamine.

[0014] Furthermore, the aforementioned device for preparing N,N-dimethyltrifluoromethanesulfonamide, wherein the liquid trifluoromethanesulfonyl fluoride delivery power mechanism and the liquid dimethylamine delivery power mechanism include: a nitrogen input main pipe, the nitrogen input main pipe is provided with a pressure reducing valve, the nitrogen input main pipe is connected to a first nitrogen input branch pipe with a first branch check valve and a second nitrogen input branch pipe with a second branch check valve, the first nitrogen input branch pipe extends into the trifluoromethanesulfonyl fluoride storage tank, the second nitrogen input branch pipe is connected to the first nitrogen input branch pipe, and the second nitrogen input branch pipe is connected to the second nitrogen input branch pipe. The inlet branch pipe extends into the dimethylamine storage tank; nitrogen enters the trifluoromethanesulfonyl fluoride storage tank through the nitrogen input main pipe and the first nitrogen input branch pipe, thereby causing liquid trifluoromethanesulfonyl fluoride to be transported to the dynamic tubular reactor through the first output pipe and the trifluoromethanesulfonyl fluoride delivery pipe by means of supercharging; nitrogen enters the dimethylamine storage tank through the nitrogen input main pipe and the second nitrogen input branch pipe, thereby causing liquid dimethylamine to be transported to the dynamic tubular reactor through the second output pipe and the dimethylamine delivery pipe by means of supercharging.

[0015] Furthermore, the aforementioned preparation device for N,N-dimethyltrifluoromethanesulfonamide, wherein the output end of the dynamic tubular reactor is connected to a collecting tank, which is connected to a centrifugal extraction mechanism through a material to be washed conveying pipe, and the centrifugal extraction mechanism includes a centrifugal extraction mechanism material to be washed input end and a centrifugal extraction mechanism material to be washed output end, the collecting tank is connected to the centrifugal extraction mechanism material to be washed input end through a material to be washed conveying pipe, and a material conveying pump is provided on the material to be washed conveying pipe.

[0016] Furthermore, the aforementioned preparation device for N,N-dimethyltrifluoromethanesulfonamide, wherein the centrifugal extractor includes 2 to 6 stages of centrifugal extractors arranged in series, the first-stage centrifugal extractor at the input end of the material to be washed is the input end centrifugal extractor, and the first-stage centrifugal extractor at the output end of the material to be washed is the output end centrifugal extractor, each centrifugal extractor is provided with a light phase inlet, a light phase outlet, a heavy phase inlet and a heavy phase outlet, and along the direction from the input end centrifugal extractor to the output end centrifugal extractor, the light phase outlet of the previous stage of each adjacent two centrifugal extractors is connected to the light phase inlet of the next stage, and the heavy phase inlet of the previous stage is connected to the heavy phase outlet of the next stage, the material conveying pipe to be washed is connected to the light phase inlet of the input end centrifugal extractor, and the washed material is output from the light phase outlet of the output end centrifugal extractor; the detergent is input from the heavy phase inlet of the output end centrifugal extractor, and the waste detergent generated after washing is discharged from the heavy phase outlet of the input end centrifugal extractor.

[0017] Furthermore, in the aforementioned preparation device suitable for N,N-dimethyltrifluoromethanesulfonamide, the cooling jacket input port is arranged close to the insulation section, and the cooling jacket output port is arranged close to the input end of the dynamic tubular reactor; the heating jacket input port is arranged close to the output end of the dynamic tubular reactor, and the heating jacket output port is arranged close to the insulation section.

[0018] The advantages of the utility model are: first, a liquid trifluoromethanesulfonyl fluoride supply mechanism and a liquid dimethylamine supply mechanism are provided to directly deliver liquid trifluoromethanesulfonyl fluoride and liquid dimethylamine into the dynamic tubular reactor, so that the reaction materials trifluoromethanesulfonyl fluoride and dimethylamine react directly in the liquid state without the use of auxiliary solvents and other reaction reagents, which can effectively reduce production costs and greatly improve the purity of the product. The purity of N,N-dimethyltrifluoromethanesulfonamide produced by the applicant using the device can reach 99.9%, which is suitable for industrial production. Second, the dynamic tubular reactor is divided into three different temperature zones: a cooling section, a holding section, and a heating section. The cooling and heating sections can be temperature-controlled separately. The temperature within the cooling section of the dynamic tubular reactor can be controlled at a low temperature, such as -50°C to -30°C. This low temperature control prevents the reactants from reacting violently at the input of the dynamic tubular reactor, ensuring that the materials are first evenly mixed, thereby effectively preventing the occurrence of side reactions and effectively controlling the reaction process. The reactants are first thoroughly mixed in the cooling section of the dynamic tubular reactor. The evenly mixed materials then fully react after entering the holding section. Further reaction occurs under the heating effect of the heating section. The three different temperature zones ensure a fully complete reaction and significantly improve the conversion rate. Second, a centrifugal extraction mechanism is used for washing, and deionized water can be used as the detergent, which greatly reduces product purification costs and significantly improves product purity. The materials to be washed in the centrifugal extraction mechanism flow in opposite directions to the detergent, which further reduces the amount of detergent used, further reducing production costs and making it more suitable for industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a schematic structural diagram of a device for preparing N,N-dimethyltrifluoromethanesulfonamide. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 As shown, a device suitable for preparing N,N-dimethyltrifluoromethanesulfonamide includes a dynamic tubular reactor 4 having a dynamic tubular reactor input end 401 and a dynamic tubular reactor output end 402 at either end. A stirring screw 45 is disposed within the dynamic tubular reactor 4 to continuously transport materials from the dynamic tubular reactor input end 401 to the dynamic tubular reactor output end 402. The rotation of the stirring screw 45 not only transports the materials but also stirs and mixes the reaction materials by controlling the rotational speed.

[0022] The dynamic tubular reactor 4 is divided into a cooling section 41, a heat-insulating section 42, and a heating section 43, sequentially from the dynamic tubular reactor input end 401 to the dynamic tubular reactor output end 402. The dynamic tubular reactor 4 in the cooling section 41 is provided with a cooling jacket 411 for introducing a coolant; the outer wall of the dynamic tubular reactor 4 in the heat-insulating section 42 is provided with an insulation layer 421; and the dynamic tubular reactor 4 in the heating section 43 is provided with a heating jacket 431. The cooling jacket input port 412 is located near the heat-insulating section 42, and the cooling jacket output port 413 is located near the dynamic tubular reactor input end 401. The heating jacket input port 432 is located near the dynamic tubular reactor output end 402, and the heating jacket output port 433 is located near the heat-insulating section 42. The purpose of the cooling section 41 is to keep the reaction materials in the dynamic tubular reactor input end 401 region at a low temperature by introducing a coolant into the cooling section 41. This can prevent the materials from reacting violently in the cooling section 41 region, thereby preventing the occurrence of side reactions and allowing the reaction materials that have just entered the dynamic tubular reactor input end 401 to be mixed evenly. The insulation section 42 is the transition and connection between the cooling section 41 and the heating section 43. After the reaction materials are mixed evenly in the cooling section 41, they enter the insulation section for full reaction, which can effectively improve the conversion rate and avoid the occurrence of side reactions. The setting of the heating section 43 can allow the materials to further fully react by appropriate heating, thereby improving the reaction yield.

[0023] The dynamic tubular reactor output end 402 is connected to a centrifugal extraction mechanism 8, which comprises at least two stages of centrifugal extractors arranged in series. The dynamic tubular reactor input end 401 is connected to a liquid trifluoromethanesulfonyl fluoride supply mechanism 2 for delivering liquid trifluoromethanesulfonyl fluoride, and a liquid dimethylamine supply mechanism 3 for supplying liquid dimethylamine. The liquid trifluoromethanesulfonyl fluoride supply mechanism 2 and the liquid dimethylamine supply mechanism 3 can directly supply liquid trifluoromethanesulfonyl fluoride and liquid dimethylamine to the dynamic tubular reactor 4, thereby enabling the reaction to proceed directly without the use of additional organic solvents, effectively reducing production costs and improving product purity.

[0024] The liquid trifluoromethanesulfonyl fluoride supply mechanism 2 includes a trifluoromethanesulfonyl fluoride storage tank 21 with a first pressure gauge 211, which is disposed within a cooling device. The cooling device cools the trifluoromethanesulfonyl fluoride within the trifluoromethanesulfonyl fluoride storage tank 21 to a liquid state. A first output pipe 26 is disposed within the trifluoromethanesulfonyl fluoride storage tank 21. The lower end of the first output pipe 26 extends into the bottom of the trifluoromethanesulfonyl fluoride storage tank 21. The upper end of the first output pipe 26 is connected to a trifluoromethanesulfonyl fluoride delivery pipe 25 coated with a heat-insulating material. The trifluoromethanesulfonyl fluoride delivery pipe 25 is connected to the dynamic tubular reactor input 401. A first backpressure valve 22, a first mass flowmeter 23, and a first check valve 24 are sequentially disposed on the trifluoromethanesulfonyl fluoride delivery pipe 25, along the direction of trifluoromethanesulfonyl fluoride delivery. The first backpressure valve 22 is provided to ensure that the trifluoromethanesulfonyl fluoride within the trifluoromethanesulfonyl fluoride delivery pipe 25 remains in a liquid state. The first mass flowmeter 23 is used to monitor the mass flow of liquid trifluoromethanesulfonyl fluoride. Under the action of the liquid trifluoromethanesulfonyl fluoride delivery mechanism, liquid trifluoromethanesulfonyl fluoride is sequentially delivered from the first output pipe 26 and the trifluoromethanesulfonyl fluoride delivery pipe 25 to the input end 401 of the dynamic tubular reactor.

[0025] The liquid dimethylamine supply mechanism 3 includes a dimethylamine storage tank 31 equipped with a second pressure gauge 311, which is installed in a cooling device. The dimethylamine in the dimethylamine storage tank 31 is cooled by the cooling device and is in a liquid state. A second output pipe 36 is installed in the dimethylamine storage tank 31. The lower end of the second output pipe 36 extends to the bottom of the dimethylamine storage tank 31. The upper end of the second output pipe 36 is connected to a dimethylamine delivery pipe 35 coated with a thermal insulation material. The dimethylamine delivery pipe 35 is connected to the input end 401 of the dynamic tubular reactor. A second backpressure valve 32, a second mass flowmeter 33, and a second check valve 34 are installed in the dimethylamine delivery pipe 35 in the direction of liquid dimethylamine delivery. The second backpressure valve 32 is provided to ensure that the dimethylamine in the dimethylamine delivery pipe 35 remains in a liquid state. Under the action of the liquid dimethylamine delivery mechanism, liquid dimethylamine is sequentially delivered via second output pipe 36 and dimethylamine delivery pipe 35 to dynamic tubular reactor input end 401. The cooling devices in the aforementioned liquid trifluoromethanesulfonyl fluoride supply mechanism 2 and liquid dimethylamine supply mechanism 3 can be of any structure, as long as they can cool and liquefy trifluoromethanesulfonyl fluoride and dimethylamine.

[0026] In this embodiment, the liquid trifluoromethanesulfonyl fluoride and liquid dimethylamine delivery mechanisms include a nitrogen input manifold 1 equipped with a pressure reducing valve 11. The nitrogen input manifold 11 is connected to a first nitrogen input branch 12 with a first branch check valve 121 and a second nitrogen input branch 13 with a second branch check valve 131. The first nitrogen input branch 12 extends into a trifluoromethanesulfonyl fluoride storage tank 21, while the second nitrogen input branch 13 extends into a dimethylamine storage tank 31. Nitrogen enters the trifluoromethanesulfonyl fluoride storage tank 21 through the nitrogen input manifold 1 and the first nitrogen input branch 12, thereby pressurizing the liquid trifluoromethanesulfonyl fluoride and delivering it to the dynamic tubular reactor 4 through a first output pipe 26 and a trifluoromethanesulfonyl fluoride delivery pipe 25. Nitrogen enters dimethylamine storage tank 31 through nitrogen input manifold 1 and second nitrogen input branch pipe 13, thereby pressurizing liquid dimethylamine and delivering it to dynamic tubular reactor 4 through second output pipe 36 and dimethylamine delivery pipe 35. The aforementioned liquid trifluoromethanesulfonyl fluoride and liquid dimethylamine delivery mechanisms provide reliable and stable delivery power for liquid trifluoromethanesulfonyl fluoride and liquid dimethylamine.

[0027] The output end 402 of the dynamic tubular reactor is connected to a collecting tank 5, which is connected to a centrifugal extraction mechanism 8 through a material conveying pipe 51 for washing. The centrifugal extraction mechanism 8 includes an input end for the material to be washed by the centrifugal extraction mechanism and an output end for the material to be washed by the centrifugal extraction mechanism. The collecting tank 5 is connected to the input end for the material to be washed by the material conveying pipe 51 of the centrifugal extraction mechanism 8, and a material conveying pump 6 is provided on the material conveying pipe 5 for washing.

[0028] The centrifugal extractor includes 2 to 6 stages of centrifugal extractors arranged in series. The more stages of centrifugal extractors, the less detergent can be used, which can reduce the detergent content in the finished product. In this embodiment, a four-stage centrifugal extractor is used as an example. The first-stage centrifugal extractor at the input end of the material to be washed is the input end centrifugal extractor 81, and the first-stage centrifugal extractor at the output end of the material to be washed is the output end centrifugal extractor 84. The four-stage centrifugal extractors are arranged in the direction of flow of the material to be washed, namely, the first-stage centrifugal extractor 81, the second-stage centrifugal extractor 82, the third-stage centrifugal extractor 83, and the fourth-stage centrifugal extractor 84. The input end centrifugal extractor 81 is also the first-stage centrifugal extractor 81, and the output end centrifugal extractor 84 is also the fourth-stage centrifugal extractor 84. Each centrifugal extractor is provided with a light phase inlet and outlet, as well as a heavy phase inlet and outlet. The material to be washed is conveyed through the first-stage light phase inlet 811 of the centrifugal extractor 81 at the input end. The washed material is then discharged through the fourth-stage light phase outlet 841 of the centrifugal extractor 84 at the output end. Detergent is supplied through the fourth-stage heavy phase inlet 842 of the centrifugal extractor 84 at the output end. In this embodiment, detergent delivery pump 7 is used for delivery. Waste detergent generated after washing is discharged through the first-stage heavy phase outlet 812 of the centrifugal extractor 81 at the input end. The material to be washed flows in the opposite direction to the detergent, effectively saving detergent usage and thus reducing production costs. Deionized water is sufficient as the detergent.

[0029] As can be seen from the above embodiments, the advantages of the present invention are: 1. A liquid trifluoromethanesulfonyl fluoride supply mechanism and a liquid dimethylamine supply mechanism are provided to directly deliver liquid trifluoromethanesulfonyl fluoride and liquid dimethylamine into the dynamic tubular reactor, so that the reaction materials trifluoromethanesulfonyl fluoride and dimethylamine react directly in the liquid state without the use of auxiliary solvents and other reaction reagents. This can effectively reduce production costs and greatly improve the conversion rate and the purity of the product. The purity of N,N-dimethyltrifluoromethanesulfonamide produced by the applicant using this device can reach 99.9%, and the conversion rate is above 90%. Second, the dynamic tubular reactor 4 is divided into three different temperature zones: a cooling section, a heat preservation section, and a heating section. The cooling section and the heating section can be temperature-controlled separately. The temperature in the dynamic tubular reactor 4 in the cooling section 41 can be controlled at a low temperature, such as -50°C to -30°C. Low temperature control can prevent the reaction materials from reacting violently at the dynamic tubular reactor input end 401, ensuring that the materials are first mixed evenly, thereby effectively avoiding the occurrence of side reactions and effectively controlling the reaction process. The reaction materials are first fully mixed in the dynamic tubular reactor 4 in the cooling section 41. The evenly mixed materials enter the heat preservation section area and fully react. They are further fully reacted under the heating effect of the heating section. The three different temperature sections ensure that the reaction is fully and completely completed, greatly improving the conversion rate. Second, a centrifugal extraction mechanism is used for washing. Deionized water can be used directly as the detergent, which greatly reduces the cost of product purification and can greatly improve the purity of the product. The flow direction of the material to be washed in the centrifugal extraction mechanism is opposite to that of the detergent, which can further save the amount of detergent used, thereby further reducing production costs.

Claims

1. A device for preparing N,N-dimethyltrifluoromethanesulfonamide, comprising a dynamic tubular reactor, wherein the two ends of the dynamic tubular reactor are respectively a dynamic tubular reactor input end and a dynamic tubular reactor output end, and characterized in that: The dynamic tubular reactor is provided with a stirring screw capable of conveying reaction materials from the input end to the output end of the dynamic tubular reactor. The dynamic tubular reactor is divided into a cooling section, a heat preservation section, and a heating section in sequence from the input end to the output end. The dynamic tubular reactor in the cooling section is provided with a cooling jacket for introducing a coolant; the outer wall of the dynamic tubular reactor in the heat preservation section is provided with a heat preservation layer; the dynamic tubular reactor in the heating section is provided with a heating jacket for introducing a heating agent; the output end of the dynamic tubular reactor is connected to a centrifugal extraction mechanism, which includes at least two stages of centrifugal extractors arranged in series; the input end of the dynamic tubular reactor is connected to a liquid trifluoromethanesulfonyl fluoride supply mechanism for providing liquid trifluoromethanesulfonyl fluoride, and a liquid dimethylamine supply mechanism for providing liquid dimethylamine.

2. The device for preparing N,N-dimethyltrifluoromethanesulfonamide according to claim 1, characterized in that: The liquid trifluoromethanesulfonyl fluoride supply mechanism includes: a trifluoromethanesulfonyl fluoride storage tank with a first pressure gauge arranged in a cooling device, the trifluoromethanesulfonyl fluoride in the trifluoromethanesulfonyl fluoride storage tank is in liquid state under the cooling effect of the cooling device, a first output pipe is provided in the trifluoromethanesulfonyl fluoride storage tank, the lower end of the first output pipe extends to the bottom of the trifluoromethanesulfonyl fluoride storage tank, the upper end of the first output pipe is connected to a trifluoromethanesulfonyl fluoride delivery pipe coated with a heat-insulating material, the trifluoromethanesulfonyl fluoride delivery pipe is connected to the input end of the dynamic tubular reactor, and under the action of the liquid trifluoromethanesulfonyl fluoride delivery power mechanism, the liquid trifluoromethanesulfonyl fluoride is sequentially delivered to the input end of the dynamic tubular reactor through the first output pipe and the trifluoromethanesulfonyl fluoride delivery pipe.

3. The device for preparing N,N-dimethyltrifluoromethanesulfonamide according to claim 2, characterized in that: The trifluoromethanesulfonyl fluoride delivery pipe is provided with a first back pressure valve, a first mass flow meter, and a first one-way valve in sequence along the delivery direction of the trifluoromethanesulfonyl fluoride.

4. The device for preparing N,N-dimethyltrifluoromethanesulfonamide according to claim 1, 2 or 3, characterized in that: The liquid dimethylamine supply mechanism includes: a dimethylamine storage tank with a second pressure gauge disposed in a cooling device, wherein the dimethylamine in the dimethylamine storage tank is in a liquid state under the cooling effect of the cooling device; a second output pipe is disposed in the dimethylamine storage tank, wherein the lower end of the second output pipe extends to the bottom of the dimethylamine storage tank; the upper end of the second output pipe is connected to a dimethylamine delivery pipe coated with a heat-insulating material, and the dimethylamine delivery pipe is connected to an input end of a dynamic tubular reactor; and under the action of the liquid dimethylamine delivery power mechanism, the liquid dimethylamine is sequentially delivered to the dynamic tubular reactor through the second output pipe and the dimethylamine delivery pipe.

5. The device for preparing N,N-dimethyltrifluoromethanesulfonamide according to claim 4, characterized in that: A second back pressure valve, a second mass flow meter, and a second one-way valve are sequentially arranged on the dimethylamine delivery pipe along the delivery direction of the liquid dimethylamine.

6. The device for preparing N,N-dimethyltrifluoromethanesulfonamide according to claim 5, characterized in that: The liquid trifluoromethanesulfonyl fluoride conveying power mechanism and the liquid dimethylamine conveying power mechanism include: a nitrogen input main pipe, the nitrogen input main pipe is provided with a pressure reducing valve, the nitrogen input main pipe is connected to a first nitrogen input branch pipe with a first branch check valve and a second nitrogen input branch pipe with a second branch check valve, the first nitrogen input branch pipe extends into a trifluoromethanesulfonyl fluoride storage tank, and the second nitrogen input branch pipe extends into a dimethylamine storage tank; nitrogen enters the trifluoromethanesulfonyl fluoride storage tank through the nitrogen input main pipe and the first nitrogen input branch pipe, thereby causing liquid trifluoromethanesulfonyl fluoride to be conveyed to a dynamic tubular reactor through a first output pipe and a trifluoromethanesulfonyl fluoride conveying pipe by means of supercharging; nitrogen enters the dimethylamine storage tank through the nitrogen input main pipe and the second nitrogen input branch pipe, thereby causing liquid dimethylamine to be conveyed to the dynamic tubular reactor through the second output pipe and the dimethylamine conveying pipe by means of supercharging.

7. The device for preparing N,N-dimethyltrifluoromethanesulfonamide according to claim 1, characterized in that: The output end of the dynamic tubular reactor is connected to a collecting tank, which is connected to a centrifugal extraction mechanism through a material conveying pipe to be washed. The centrifugal extraction mechanism includes a centrifugal extraction mechanism material input end to be washed and a centrifugal extraction mechanism material output end to be washed. The collecting tank is connected to the centrifugal extraction mechanism material input end to be washed through a material conveying pipe to be washed, and a material conveying pump is provided on the material conveying pipe to be washed.

8. The device for preparing N,N-dimethyltrifluoromethanesulfonamide according to claim 7, characterized in that: The centrifugal extractor includes 2 to 6 stages of centrifugal extractors arranged in series, wherein the first stage centrifugal extractor at the input end of the material to be washed is the input end centrifugal extractor, and the first stage centrifugal extractor at the output end of the material to be washed is the output end centrifugal extractor. Each centrifugal extractor is provided with a light phase inlet, a light phase outlet, a heavy phase inlet, and a heavy phase outlet. From the input end centrifugal extractor to the output end centrifugal extractor, the light phase outlet of the previous stage of each adjacent two centrifugal extractors is connected to the light phase inlet of the next stage, and the heavy phase inlet of the previous stage is connected to the heavy phase outlet of the next stage. The material conveying pipe to be washed is connected to the light phase inlet of the input end centrifugal extractor, and the washed material is output from the light phase outlet of the output end centrifugal extractor. The detergent is input from the heavy phase inlet of the centrifugal extractor at the output end, and the waste detergent generated after washing is discharged from the heavy phase outlet of the centrifugal extractor at the input end.

9. The device for preparing N,N-dimethyltrifluoromethanesulfonamide according to claim 1, characterized in that: The cooling jacket input port is arranged close to the insulation section, and the cooling jacket output port is arranged close to the input end of the dynamic tubular reactor; the heating jacket input port is arranged close to the output end of the dynamic tubular reactor, and the heating jacket output port is arranged close to the insulation section.

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