A production system and production method of bis(fluorosulfonyl)imide

Abstract

The present invention provides a production system and production method of bis(fluorosulfonyl)imide, comprising a static mixer, a main reactor and more than one sub-reactor; the static mixer is connected to a hydrogen fluoride supply source through a first heat exchanger, and is connected to a bis(chlorosulfonyl)imide supply source through a second heat exchanger; the main reactor is connected to the static mixer through a mixed liquid delivery pipeline; the sub-reactor is connected to the main reactor through a reactant delivery pipeline, and is connected to the main reactor through a tail gas outlet pipeline; the sub-reactor is connected to another sub-reactor or a next process device through a reactant delivery pipeline, and is connected to another sub-reactor or a tail gas recovery device through a tail gas outlet pipeline. The present invention can not only improve the utilization rate of hydrogen fluoride, but also has a high production capacity and can achieve continuous production.

Description

Technical Field

[0001] The invention relates to a production system and a production method of bisfluorosulfonyl imide, in particular to a production system and a production method of bisfluorosulfonyl imide by reacting bischlorosulfonyl imide with anhydrous hydrogen fluoride. Background Art

[0002] At present, considering factors such as battery cost and safety performance, LiPF6 (lithium hexafluorophosphate) is the most widely used lithium salt in commercial lithium batteries. However, the main problem of lithium hexafluorophosphate as an electrolyte is its poor thermal stability and water stability. Therefore, the lithium battery industry continues to look for new materials to optimize electrolyte performance. As an additive for lithium-ion battery electrolytes, bis(fluorosulfonyl)imide lithium salt has the advantages of high conductivity, high chemical stability, and high thermal stability. It has the potential to replace lithium hexafluorophosphate and will become the core competitiveness of electrolyte companies in the high-nickel era.

[0003] Bis(fluorosulfonyl)imide is an important intermediate for the synthesis of lithium bis(fluorosulfonyl)imide. The current mainstream process for producing bis(fluorosulfonyl)imide is to use bis(chlorosulfonyl)imide and anhydrous hydrogen fluoride to react in an intermittent reactor. Specifically, bis(chlorosulfonyl)imide and anhydrous hydrogen fluoride are quantitatively added to the reactor, and the bis(chlorosulfonyl)imide and anhydrous hydrogen fluoride in the reactor are fully reacted to obtain the bis(fluorosulfonyl)imide product. After the bis(fluorosulfonyl)imide product in the reactor is discharged, the next batch of bis(chlorosulfonyl)imide and anhydrous hydrogen fluoride are quantitatively added to the reactor again. Although the control of the entire reaction process is relatively simple and a higher conversion rate can be obtained in such a production process (method), there are problems such as low reaction rate, long reaction time, and low production capacity.

[0004] As a method for preparing bisfluorosulfonyl imide by reacting bischlorosulfonyl imide with hydrogen fluoride, there is a method disclosed in Chinese patent CN104925765, which has the problems of long fluorination reaction and post-treatment time, large amount of excess hydrogen fluoride exists after the reaction, and nitrogen gas needs to be purged for a long time, thereby reducing the utilization rate of hydrogen fluoride and low production efficiency.

[0005] The present invention aims to provide a production system and a production method for continuously producing bis(fluorosulfonyl)imide which can not only improve the utilization rate of hydrogen fluoride but also have higher production capacity. Summary of the invention

[0006] The present invention provides a production system of bis(fluorosulfonyl)imide, comprising a main reactor and one or more secondary reactors; the secondary reactor is connected to the main reactor through a reactant delivery pipeline, and is connected to the main reactor through a tail gas outlet pipeline; the secondary reactor is connected to another secondary reactor or a next process device through a reactant delivery pipeline, and is connected to another secondary reactor or a tail gas recovery device through a tail gas outlet pipeline; the reactant after reacting in the main reactor for a specified time is transported to the secondary reactor through the reactant delivery pipeline, and the unreacted hydrogen fluoride during the reaction in the main reactor is transported to the secondary reactor through the tail gas outlet pipeline; the reactant after reacting in the secondary reactor for a specified time is transported to another secondary reactor or a next process device through the reactant delivery pipeline, and the unreacted hydrogen fluoride during the reaction in the secondary reactor is transported to another secondary reactor or a tail gas recovery device through the tail gas outlet pipeline.

[0007] Preferably, it also includes a static mixer, which is connected to a hydrogen fluoride supply source and a bis(chlorosulfonyl)imide supply source; the main reactor is connected to the static mixer through a mixed liquid delivery pipeline, and the mixed liquid of hydrogen fluoride and bis(chlorosulfonyl)imide mixed in the static mixer is delivered to the main reactor through the mixed liquid delivery pipeline.

[0008] Preferably, the method further comprises a first heat exchanger and a second heat exchanger, wherein the static mixer is connected to a hydrogen fluoride supply source via the first heat exchanger, and is connected to a bischlorosulfonyl imide supply source via the second heat exchanger; the hydrogen fluoride supplied from the hydrogen fluoride supply source to the static mixer has its temperature adjusted by passing through the first heat exchanger on the way, and the bischlorosulfonyl imide supplied from the bischlorosulfonyl imide supply source to the static mixer has its temperature adjusted by passing through the second heat exchanger on the way.

[0009] Preferably, the sub-reactors include two or more in series.

[0010] Preferably, at least one of the main reactor and the secondary reactor is provided with a stirrer.

[0011] Preferably, at least one of the main reactor and the secondary reactor is provided with a gas distributor connected to the tail gas outlet pipeline.

[0012] Preferably, liquid level sensors are provided on the main reactor and the auxiliary reactor, a regulating valve is provided on the reactant delivery pipeline, a pressure sensor is provided on the exhaust gas outlet pipeline, and a regulating valve is also provided on at least the exhaust gas outlet pipeline connected to the exhaust gas recovery device.

[0013] Further preferably, when there are more than two auxiliary reactors, a switching device is provided on the exhaust gas outlet pipeline between the two auxiliary reactors, and the switching device is also connected to the exhaust gas recovery device through the exhaust gas outlet pipeline; at the same time, a reactant delivery switching device is provided on the reactant delivery pipeline between the two auxiliary reactors, and the reactant delivery switching device is also connected to the next process device through the reactant delivery pipeline.

[0014] The present invention also provides a method for producing bisfluorosulfonyl imide, which is a method for producing bisfluorosulfonyl imide by using the above-mentioned bisfluorosulfonyl imide production system, comprising: a main reaction step, in which hydrogen fluoride transported from the hydrogen fluoride supply source to the main reactor reacts with bischlorosulfonyl imide transported from the bischlorosulfonyl imide supply source to the main reactor; and a side reaction step, in which reactants transported from the main reactor or the side reactor to the side reactor or another side reactor react in the side reactor or another side reactor.

[0015] The present invention also provides a method for producing bisfluorosulfonyl imide, which is a method for producing bisfluorosulfonyl imide by using the above-mentioned bisfluorosulfonyl imide production system, comprising: a raw material mixing step, in which hydrogen fluoride and bischlorosulfonyl imide are mixed into a mixed liquid in the static mixer; a main reaction step, in which the mixed liquid of hydrogen fluoride and bischlorosulfonyl imide transported from the static mixer to the main reactor reacts in the main reactor; and a side reaction step, in which the reactants transported from the main reactor or the side reactor to the side reactor or another side reactor react in the side reactor or another side reactor.

[0016] The present invention also provides a method for producing bisfluorosulfonyl imide, which is a method for producing bisfluorosulfonyl imide by using the above-mentioned bisfluorosulfonyl imide production system, comprising: a raw material temperature adjustment step, in which the hydrogen fluoride supplied from the hydrogen fluoride supply source to the static mixer passes through a first heat exchanger to adjust its temperature, and the bischlorosulfonyl imide supplied from the bischlorosulfonyl imide supply source to the static mixer passes through a second heat exchanger to adjust its temperature; a raw material mixing step, in which hydrogen fluoride and bischlorosulfonyl imide are mixed into a mixed liquid in the static mixer; a main reaction step, in which the mixed liquid of hydrogen fluoride and bischlorosulfonyl imide transported from the static mixer to the main reactor reacts in the main reactor; and a side reaction step, in which the reactant transported from the main reactor or the side reactor to the side reactor or another side reactor reacts in the side reactor or another side reactor.

[0017] The production system and method of bisfluorosulfonyl imide of the present invention are based on pre-adjusting and controlling the temperature of the raw materials participating in the reaction, mixing the raw materials participating in the reaction in advance through a static mixer, and then passing through a multi-stage reactor so that each stage of the reaction is carried out in stages in different reactors, thereby achieving the purpose of providing a production system and method for continuously producing bisfluorosulfonyl imide that can not only improve the utilization rate of hydrogen fluoride but also have higher production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram showing a production system of bisfluorosulfonyl imide of the present invention is shown;

[0019] Figure 2 A schematic diagram of a production system of bisfluorosulfonyl imide according to another embodiment of the present invention is shown.

[0020] In the figure: 10-production system of bis(fluorosulfonyl)imide; 11-static mixer; 12-main reactor; 13, 14-auxiliary reactors; 34, 38, 42-reactant delivery pipelines; 35, 39, 44-tail gas outlet pipelines; 43-next process device; 45-tail gas recovery device. DETAILED DESCRIPTION

[0021] The technical scheme and its effects of the present invention are described in detail below through specific implementation methods. The following implementation methods are only used to illustrate the content of the present invention, and the invention is not limited to the following implementation methods or examples. Simple changes made to the present invention using the concept of the present invention are all within the scope of protection claimed by the present invention.

[0022] The present invention provides a production system for producing bisfluorosulfonyl imide by reacting bischlorosulfonyl imide with anhydrous hydrogen fluoride. The bisfluorosulfonyl imide production system 10 of this embodiment is as follows: Figure 1 As shown, it includes a static mixer 11, a primary reactor 12 as a main reactor, and a secondary reactor 13 and a tertiary reactor 14 as secondary reactors.

[0023] The static mixer 11 is connected to the hydrogen fluoride raw material tank 16 as the hydrogen fluoride supply source through the first heat exchanger 15. Specifically, the hydrogen fluoride liquid in the hydrogen fluoride raw material tank 16 is transported to the static mixer 11 after heat exchange through the first heat exchanger 15 through the delivery pump 17. At this time, the flow rate of the hydrogen fluoride liquid is controlled by the flow meter 18 and the regulating valve 19; at the same time, the temperature of the hydrogen fluoride liquid entering the static mixer 11 is interlocked and controlled by the thermometer 20 and the regulating valve 21 at the outlet of the first heat exchanger 15 (the interlocking control is represented by the dotted line connection in the figure, the same below). In this embodiment, the first heat exchanger 15 is a steam heat exchanger. After the steam supplied from the steam supply source 22 enters the first heat exchanger 15, the hydrogen fluoride liquid flowing through the first heat exchanger 15 is heat exchanged, thereby controlling the temperature of the hydrogen fluoride liquid, and the steam after heat exchange is sent back to the steam recovery device 23.

[0024] Similarly, the static mixer 11 is connected to the bischlorosulfonyl imide raw material tank 25 as the bischlorosulfonyl imide supply source through the second heat exchanger 24. Specifically, the bischlorosulfonyl imide in the bischlorosulfonyl imide raw material tank 25 is transported to the static mixer 11 through the transport pump 26 and the second heat exchanger 24 after heat exchange. At this time, the flow rate of the transported bischlorosulfonyl imide is controlled by the flow meter 27 and the regulating valve 28; at the same time, the temperature of the bischlorosulfonyl imide entering the static mixer 11 is controlled by the thermometer 29 at the outlet of the second heat exchanger 24 and the regulating valve 30. In this embodiment, the second heat exchanger 24 also adopts a steam heat exchanger. After the steam supplied from the steam supply source 31 enters the second heat exchanger 24, the bischlorosulfonyl imide flowing through the second heat exchanger 24 is heat exchanged, thereby controlling the temperature of the bischlorosulfonyl imide. The steam after heat exchange is sent back to the steam recovery device 32.

[0025] In addition, the primary reactor 12 is connected to the static mixer 11 through a mixed liquid delivery pipeline 33. After the two raw materials (i.e., hydrogen fluoride and bis(chlorosulfonyl)imide) are uniformly mixed in the static mixer 11, the mixed liquid enters the primary reactor 12 through the bottom of the primary reactor 12 and reacts in the primary reactor 12.

[0026] The secondary reactor 13 is connected to the primary reactor 12 via a reactant delivery pipeline 34, and is also connected to the primary reactor 12 via an exhaust gas outlet pipeline 35. In addition, a liquid level sensor 36 is provided on the primary reactor 12, and a regulating valve 37 is provided on the reactant delivery pipeline 34. The liquid level of the reactant in the primary reactor 12 is interlockedly controlled by the regulating valve 37 and the liquid level sensor 36.

[0027] The tertiary reactor 14 is connected to the secondary reactor 13 through a reactant delivery pipeline 38, and is also connected to the secondary reactor 13 through an exhaust gas outlet pipeline 39. In addition, a liquid level sensor 40 is provided on the secondary reactor 13, and a regulating valve 41 is provided on the reactant delivery pipeline 38, and the liquid level of the reactant in the secondary reactor 13 is interlocked with the liquid level sensor 40 through the regulating valve 41. In addition, the tertiary reactor 14 is connected to a product discharge device 43 as a next process device through a reactant delivery pipeline 42, and is also connected to an exhaust gas recovery device 45 through an exhaust gas outlet pipeline 44. A liquid level sensor 46 is provided on the tertiary reactor 14, and a regulating valve 47 is provided on the reactant delivery pipeline 42, and the liquid level of the reactant in the tertiary reactor 14 is interlocked with the liquid level sensor 46 through the regulating valve 47.

[0028] In addition, the first-stage reactor 12, the second-stage reactor 13 and the third-stage reactor 14 are each provided with a stirring paddle 51 driven by a stirring motor 50. At the same time, the first-stage reactor 12, the second-stage reactor 13 and the third-stage reactor 14 are each provided with a jacket 52 on their outer shells, and each jacket 52 is respectively connected to a steam heat source supply device 53 for supplying steam and a steam condensate recovery device 54 for recovering steam. A regulating valve 55 is provided between each reactor and the steam heat source supply device 53, and a temperature sensor 56 is provided on each jacket 52.

[0029] In addition, pressure sensors 57 are provided on the exhaust gas outlet pipelines 35, 39, and 44, and a regulating valve 58 is also provided on at least the exhaust gas outlet pipeline 44 connected to the exhaust gas recovery device 45, and a flow meter 59 is also provided on at least the exhaust gas outlet pipeline 35 between the primary reactor 12 and the secondary reactor 13.

[0030] In addition, a gas distributor 60 is provided in the secondary reactor 13 and the tertiary reactor 14 serving as auxiliary reactors. The gas distributor 60 is connected to the tail gas outlet pipelines 35 and 39 respectively.

[0031] The following is a description of the production process (ie, the production method) using the above-mentioned bis(fluorosulfonyl)imide production system.

[0032] The production method of bisfluorosulfonyl imide provided by the invention comprises: a raw material temperature adjustment step, a raw material mixing step, a main reaction step and a side reaction step.

[0033] The raw material temperature adjustment process is that the hydrogen fluoride supplied from the hydrogen fluoride supply source 16 to the static mixer 11 passes through the first heat exchanger 15 on the way and its temperature is adjusted to the specified temperature required for the reaction process. At this time, the flow rate of the hydrogen fluoride liquid is controlled by the flow meter 18 and the regulating valve 19; at the same time, the temperature of the hydrogen fluoride liquid entering the static mixer 11 is controlled by the thermometer 20 and the regulating valve 21 at the outlet of the first heat exchanger 15. In addition, the bischlorosulfonyl imide supplied from the bischlorosulfonyl imide supply source 25 to the static mixer 11 passes through the second heat exchanger 24 on the way and its temperature is adjusted to the specified temperature required for the reaction process. At this time, the flow rate of the bischlorosulfonyl imide is controlled by the flow meter 27 and the regulating valve 28; at the same time, the temperature of the bischlorosulfonyl imide entering the static mixer 11 is controlled by the thermometer 29 and the regulating valve 30 at the outlet of the second heat exchanger 24.

[0034] In the raw material mixing step, hydrogen fluoride and bis(chlorosulfonyl)imide are mixed into a mixed liquid in advance in the static mixer 11 according to the proportion required by the process.

[0035] The main reaction process is that the mixed liquid of hydrogen fluoride and bis(chlorosulfonyl)imide transported from the static mixer 11 to the primary reactor 12 through the mixed liquid transport pipeline 33 reacts in the primary reactor 12. Specifically, the two raw materials are mixed evenly in the static mixer 11 and then enter the bottom of the primary reactor 12, the stirring motor 50 is turned on to drive the stirring paddle 51 to react while stirring, and the liquid level in the primary reactor 12 is kept stable through the interlocking control of the liquid level sensor 36 and the regulating valve 37. In addition, the temperature in the primary reactor 12 is also kept stable through the interlocking control of the regulating valve 55 and the temperature sensor 56. After the reaction raw material liquid reacts for a specified time in the primary reactor 12 according to the process requirements, the primary reaction product liquid (reactant) overflows from the side of the primary reactor 12 and is transported to the bottom of the secondary reactor 13 through the reactant transport pipeline 34, and the tail gas generated in the primary reactor 12 (that is, the unreacted hydrogen fluoride gas and the hydrogen chloride gas generated by the reaction) is transported to the secondary reactor 13 through the tail gas outlet pipeline 35.

[0036] The side reaction process includes the reaction in the secondary reactor 13 and the tertiary reactor 14. First, the reactants from the primary reactor 12 continue to react in the secondary reactor 13 with the unreacted hydrogen fluoride gas from the primary reactor 12. At this time, the unreacted hydrogen fluoride gas from the primary reactor 12 is evenly dispersed into the secondary reactor 13 through the gas distributor 60 connected to the tail gas outlet pipeline 35 to continue to react with the reactants from the primary reactor 12. During the reaction process, the stirring motor 50 is also turned on to drive the stirring paddle 51 to stir and react. The liquid level in the secondary reactor 13 is kept stable through the interlocking control of the liquid level sensor 40 and the regulating valve 41. In addition, the temperature in the secondary reactor 13 is also kept stable through the interlocking control of the regulating valve 55 and the temperature sensor 56. After the reaction raw material liquid reacts for a specified time in the secondary reactor 13 according to the process requirements, the secondary reaction product liquid (reactant) overflows from the side of the secondary reactor 13 and is transported to the bottom of the tertiary reactor 14 as another secondary reactor through the reactant transport pipeline 38, and the tail gas generated in the secondary reactor 13 (that is, the unreacted hydrogen fluoride gas and the hydrogen chloride gas generated by the reaction) is transported to the tertiary reactor 14 through the tail gas outlet pipeline 39. Secondly, the reactants from the secondary reactor 13 continue to react with the unreacted hydrogen fluoride gas from the secondary reactor 13 in the tertiary reactor 14. At this time, the unreacted hydrogen fluoride gas from the secondary reactor 13 is evenly dispersed into the secondary reactor 14 through the gas distributor 60 connected to the tail gas outlet pipeline 39 to continue to react with the reactants from the secondary reactor 13. During the reaction, the stirring motor 50 is turned on to drive the stirring paddle 51 to stir and react. The liquid level in the three-stage reactor 14 is kept stable through the interlocking control of the liquid level sensor 46 and the regulating valve 47. In addition, the temperature in the three-stage reactor 14 is also kept stable through the interlocking control of the regulating valve 55 and the temperature sensor 56. After the reaction raw material liquid reacts in the three-stage reactor 14 for a specified time according to the process requirements, the bisfluorosulfonyl imide product liquid is obtained and overflows from the side of the three-stage reactor 14 and is transported to the product discharging device 43 as the next process device through the reactant transport pipeline 42. The tail gas generated in the three-stage reactor 14 is transported to the tail gas recovery device 45 through the tail gas outlet pipeline 44.

[0037] During the entire multi-stage reaction process, the pressure of the entire reaction system is maintained stable through the interlocking control of each of the pressure sensors 57 and the regulating valve 58.

[0038] The production system and method of bisfluorosulfonyl imide of the present invention have the following advantages.

[0039] (1) On the basis of pre-adjusting and controlling the temperature of the raw materials participating in the reaction, the raw materials participating in the reaction are mixed in advance through a static mixer. This can reduce the time for heating and mixing the raw materials in the reactor, so that the raw materials entering the reactor can start to react immediately.

[0040] (2) The reaction is carried out in stages in a multi-stage reactor connected in series, which facilitates stable control of the process parameters of each stage of the reactor according to different reaction stages, so that continuous production can be achieved from feeding through reaction to discharging, thus achieving higher production capacity.

[0041] (3) The unreacted hydrogen fluoride gas in the previous reactor is transported to the next reactor through the tail gas outlet pipeline, and is evenly dispersed into the next reactor through the gas distributor to react with the reactants, so that the hydrogen fluoride raw material can be fully utilized, thereby improving the utilization rate of hydrogen fluoride.

[0042] (4) The entire process is simple and smooth, and it is easy to adjust the raw material ratio and control the reactions at each level according to the process parameters.

[0043] As other embodiments of the present invention, for example, the following can be adopted: Figure 2 The structure and production system shown in the embodiment are different from the above-mentioned embodiment in that a tail gas delivery switching device 70 is provided on the tail gas outlet pipeline 39 between the two secondary reactors 13 and the three-stage reactor 14 as auxiliary reactors, and the tail gas delivery switching device 70 is connected to the tail gas recovery device 45 through a tail gas outlet pipeline 71; at the same time, a reactant delivery switching device 72 is provided on the reactant delivery pipeline 38 between the two secondary reactors 13 and the three-stage reactor 14 as auxiliary reactors, and the reactant delivery switching device 72 is connected to the product discharge device 43 as the next process device through a reactant delivery pipeline 73. In this way, the unreacted hydrogen fluoride gas in the upper reactor can be switched and delivered to the next reactor or the tail gas recovery device through the tail gas delivery switching device 70, and the reactant in the upper reactor can be switched and delivered to the next reactor or the product discharge device through the reactant delivery switching device 72. For multi-stage reactors connected in series as secondary reactors, the number of stages and reactors participating in the reaction can be adjusted and controlled according to the production capacity and process parameters, so that the production system can adapt to the production of bis(fluorosulfonyl)imide requiring different reaction processes.

[0044] In the above embodiment, the number of reactors connected in series as auxiliary reactors in the system is two, or more than three, and the reactant delivery switching device and the exhaust gas switching device can be provided between each reactor as auxiliary reactor.

[0045] In addition, the raw materials can be heated and mixed in the reactor, so as a modification of this embodiment, the first heat exchanger 15 and the second heat exchanger 24 can be omitted. In this case, the static mixer 11 is directly connected to the hydrogen fluoride raw material tank 16 as the hydrogen fluoride supply source. Similarly, the static mixer 11 is also directly connected to the bischlorosulfonyl imide raw material tank 25 as the bischlorosulfonyl imide supply source.

[0046] In addition, as another modification of this embodiment, the static mixer 11 may be omitted, and the hydrogen fluoride source tank 16 as the hydrogen fluoride supply source and the bischlorosulfonyl imide source tank 25 as the bischlorosulfonyl imide supply source may be directly connected to the main reactor.

[0047] It should also be noted that the various specific technical features described in the above specific implementation methods can be combined in any suitable manner without contradiction.

Claims

1. A production system of bis(fluorosulfonyl)imide, characterized in that: It includes a main reactor and two or more auxiliary reactors connected in series, and also includes a static mixer; The secondary reactor is connected to the primary reactor via a reactant delivery pipeline and is also connected to the primary reactor via a tail gas outlet pipeline; The auxiliary reactor is connected to another auxiliary reactor or a next process device through a reactant delivery pipeline, and is connected to another auxiliary reactor or a tail gas recovery device through a tail gas outlet pipeline; The reactants after reacting in the main reactor for a specified time are transported to the secondary reactor through the reactant transport pipeline, and the unreacted hydrogen fluoride during the reaction in the main reactor is transported to the secondary reactor through the tail gas outlet pipeline; The reactants after reacting in the auxiliary reactor for a specified time are transported to another auxiliary reactor or a next process device through the reactant transport pipeline, and the unreacted hydrogen fluoride during the reaction in the auxiliary reactor is transported to another auxiliary reactor or a tail gas recovery device through the tail gas outlet pipeline; The static mixer is connected to a liquid hydrogen fluoride supply source and is also connected to a bischlorosulfonimide supply source; The main reactor is connected to the static mixer through a mixed liquid delivery pipeline, and the mixed liquid of liquid hydrogen fluoride and bis(chlorosulfonyl)imide mixed in the static mixer is delivered to the main reactor through the mixed liquid delivery pipeline.

2. The production system of bis(fluorosulfonyl)imide according to claim 1, characterized in that: The static mixer further comprises a first heat exchanger and a second heat exchanger, wherein the static mixer is connected to a hydrogen fluoride supply source through the first heat exchanger and is connected to a bischlorosulfonimide supply source through the second heat exchanger; The hydrogen fluoride supplied from the hydrogen fluoride supply source to the static mixer passes through the first heat exchanger to adjust its temperature, and the bischlorosulfonyl imide supplied from the bischlorosulfonyl imide supply source to the static mixer passes through the second heat exchanger to adjust its temperature.

3. The production system of bis(fluorosulfonyl)imide according to claim 1 or 2, characterized in that: At least one of the main reactor and the secondary reactor is provided with a stirrer.

4. The production system of bis(fluorosulfonyl)imide according to claim 1 or 2, characterized in that: At least one of the main reactor and the auxiliary reactor is provided with a gas distributor connected to the tail gas outlet pipeline.

5. The production system of bis(fluorosulfonyl)imide according to claim 1 or 2, characterized in that: The main reactor and the auxiliary reactor are provided with liquid level sensors, the reactant delivery pipeline is provided with a regulating valve, the tail gas outlet pipeline is provided with a pressure sensor, and at least the tail gas outlet pipeline connected to the tail gas recovery device is also provided with a regulating valve.

6. The production system of bis(fluorosulfonyl)imide according to claim 1 or 2, characterized in that: The exhaust gas outlet pipeline between the two auxiliary reactors is provided with an exhaust gas delivery switching device, and the exhaust gas delivery switching device is also connected to the exhaust gas recovery device through the exhaust gas outlet pipeline; at the same time, the reactant delivery pipeline between the two auxiliary reactors is provided with a reactant delivery switching device, and the reactant delivery switching device is also connected to the next process device through the reactant delivery pipeline.

7. A method for producing bisfluorosulfonyl imide, which is a method for producing bisfluorosulfonyl imide using the bisfluorosulfonyl imide production system according to any one of claims 1, 3 to 6, characterized in that: include: a raw material mixing step, in which hydrogen fluoride and bis(chlorosulfonyl)imide are mixed into a mixed liquid in the static mixer; A main reaction step, wherein the mixed liquid of hydrogen fluoride and bischlorosulfonyl imide transported from the static mixer to the main reactor reacts in the main reactor; The side reaction step is to react the reactant transported from the main reactor or the side reactor to the side reactor or another side reactor in the side reactor or another side reactor.

8. A method for producing bisfluorosulfonyl imide, which is a method for producing bisfluorosulfonyl imide using the bisfluorosulfonyl imide production system according to any one of claims 2 to 6, characterized in that: include: a raw material temperature adjustment step, wherein the hydrogen fluoride supplied from the hydrogen fluoride supply source to the static mixer passes through a first heat exchanger to adjust its temperature, and the bischlorosulfonyl imide supplied from the bischlorosulfonyl imide supply source to the static mixer passes through a second heat exchanger to adjust its temperature; a raw material mixing step, in which hydrogen fluoride and bis(chlorosulfonyl)imide are mixed into a mixed liquid in the static mixer; A main reaction step, wherein the mixed liquid of hydrogen fluoride and bischlorosulfonyl imide transported from the static mixer to the main reactor reacts in the main reactor; The side reaction step is to react the reactant transported from the main reactor or the side reactor to the side reactor or another side reactor in the side reactor or another side reactor.

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