Constant temperature device for reaction of liquid lithium bis (fluorosulfonyl) imide

Abstract

The utility model discloses a constant temperature device for liquid lithium bis (fluorosulfonyl) imide reaction, a reaction tank is connected with the constant temperature device through a heat output pipe and a heat input pipe, the reaction tank further comprises a water bath layer, an inner output pipe, a heat conduction pipe and an inner input pipe, the water bath layer is communicated with the inner output pipe and the inner input pipe, and the heat conduction pipe is communicated with the inner input pipe. According to the constant-temperature device for the liquid lithium bis (fluorosulfonyl) imide reaction, the conditions that substances such as hydrochloric acid which is easy to volatilize after being heated still exist in reactants in the actual use process in the prior art, the reaction temperature needs to be controlled, loss caused by material volatilization is reduced, and meanwhile, the reaction temperature is controlled to be beneficial to forward proceeding of the reaction are improved; the constant temperature device is arranged, so that reactants can be kept at a set temperature, the volatilization of materials can be effectively reduced, and meanwhile, the reaction efficiency can also be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production equipment, in particular to a constant temperature device for liquid lithium bis(fluorosulfonyl)imide reaction. Background Art

[0002] Lithium bis(fluorosulfonyl)imide salt can be used as an electrolyte additive for lithium-ion batteries. When used in the electrolyte of rechargeable lithium batteries, it can effectively reduce the high and low temperature resistance of the SEI layer formed on the surface of the electrode plate at low temperatures, reduce the capacity loss of the lithium battery during storage, thereby providing high battery capacity and electrochemical performance. It can also be used as an electrolyte for primary batteries; it can be used as a polymerization reaction catalyst; it can also be used as an antistatic agent in the industrial field.

[0003] Lithium bis(fluorosulfonyl)imide (LiFSI) can be used as a next-generation secondary lithium-ion battery electrolyte lithium salt to replace lithium hexafluorophosphate due to its high stability (no decomposition below 200°C), excellent low-temperature performance, good hydrolysis stability and more environmentally friendly advantages.

[0004] Currently, Chinese Patent No.: CN202020257805.5 discloses a constant temperature storage device for lithium bis(fluorosulfonyl)imide. The device includes a bracket, a tank body, a tank cover, and a constant temperature circulation pump. This storage device is novel and unique in design and easy to use, making it difficult for lithium bis(fluorosulfonyl)imide to accumulate in the device when it is released from the storage device. After the lithium bis(fluorosulfonyl)imide is stored in this storage device, it is not only completely isolated from contact with moisture, but also absolutely guarantees the dryness of the lithium bis(fluorosulfonyl)imide, avoiding the deterioration of the lithium bis(fluorosulfonyl)imide due to moisture. Moreover, this storage device can maintain the lithium bis(fluorosulfonyl)imide in a constant temperature environment, which can effectively ensure its quality. In addition, this storage device has a ventilation pipe that can pass nitrogen into the storage device and can protect the lithium bis(fluorosulfonyl)imide in the storage device. Therefore, the utility model has high practical value and promotion value.

[0005] However, in actual use, the existing technology still has the problem that there are substances such as hydrochloric acid that are easily volatile when heated in the reactants, and the reaction temperature needs to be controlled to reduce the loss caused by material volatilization. At the same time, controlling the reaction temperature is also conducive to the forward progress of the reaction. Utility Model Content

[0006] Therefore, in response to the above problems, the present invention proposes a constant temperature device for liquid lithium bis(fluorosulfonyl)imide reaction, which solves the technical problem that in the actual use of the prior art, there are still substances such as hydrochloric acid in the reactants that are easily volatile when heated, and it is necessary to control the reaction temperature to reduce the loss caused by material volatilization. At the same time, controlling the reaction temperature is also conducive to the forward progress of the reaction.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a constant temperature device for liquid lithium bis(fluorosulfonyl)imide reaction, which structure includes a reaction tank, a material output pipe, a material input pipe, a heat output pipe, a heat input pipe, and a constant temperature device, wherein the material output pipe and the material input pipe are provided on the reaction tank, and the reaction tank is connected to the constant temperature device through the heat output pipe and the heat input pipe, and the reaction tank further includes a water bath layer, an inner output pipe, a heat conduction pipe, and an inner input pipe, wherein the water bath layer is in communication with the inner output pipe and the inner input pipe, and the inner input pipe is connected to the inner output pipe through a plurality of heat conduction pipes.

[0008] The constant temperature device includes a recovery box, a recovery box output pump, a heat exchange box, heat exchange fins, an output pipe, a temperature detector, a heating device, an insulation box, and an output pump. The upper end of the recovery box is connected to the heat output pipe, the recovery box is connected to the output pipe, the recovery box output pump is provided on the output pipe, a heat exchange box is provided at the rear end of the recovery box output pump, the output pipe passes through the heat exchange box, the output pipe in the heat exchange box is connected to a plurality of heat exchange fins, a temperature detector is provided on the output pipe at the rear end of the heat exchange box, the output pipe is connected to the insulation box, the heat exchange box is connected to the heating device, the output pipe of the insulation box is connected to the output pump, and the output pump is connected to the heat input pipe.

[0009] Furthermore, the recovery box and the insulation box are both provided with pressure relief valves.

[0010] Furthermore, a heat insulating layer is provided on the inner side of the shell of the thermostat.

[0011] Furthermore, the heating device is an electric heater structure, and the heating device is connected to the heat exchange box through an input pipe and an output pipe, and a fan blade for providing air power is provided on one of the input pipe and the output pipe.

[0012] Furthermore, the heating device may also be a structure that uses a compressor for refrigeration.

[0013] By adopting the above technical solution, the beneficial effects of the utility model are as follows: the thermostat device for the liquid lithium bis(fluorosulfonyl)imide reaction improves the existing technology. During actual use, there are still substances such as hydrochloric acid in the reactants that are easily volatile when heated, and it is necessary to control the reaction temperature to reduce the loss caused by material volatilization. At the same time, controlling the reaction temperature is also conducive to the forward progress of the reaction. By setting the thermostat device, the reactants can be maintained at a set temperature, which can effectively reduce the volatilization of the materials and also improve the reaction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2It is a structural schematic diagram of the thermostat of the utility model.

[0016] In the figure: 1. Reaction tank; 2. Material output pipe; 3. Material input pipe; 4. Heat output pipe; 5. Heat input pipe; 6. Constant temperature device; 11. Water bath layer; 12. Internal output pipe; 13. Heat conduction pipe; 14. Internal inlet pipe; 21. Recovery box; 22. Recovery box output pump; 23. Heat exchange box; 24. Heat exchange plate; 25. Output pipe; 26. Temperature detector; 27. Heating device; 28. Insulation box; 29. ​​Output pump. DETAILED DESCRIPTION

[0017] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0018] refer to Figure 1-Figure 2 , This embodiment provides a constant temperature device for the reaction of liquid lithium bis(fluorosulfonyl)imide, which comprises a reaction tank 1, a material output pipe 2, a material input pipe 3, a heat output pipe 4, a heat input pipe 5, and a constant temperature device 6. The reaction tank 1 is provided with a material output pipe 2 and a material input pipe 3. The reaction tank 1 is connected to the constant temperature device 6 through the heat output pipe 4 and the heat input pipe 5. The reaction tank 1 further comprises a water bath layer 11, an inner output pipe 12, a heat conducting pipe 13, and an inner input pipe. The water bath layer 11 is connected to the inner output pipe 12 and the inner input pipe. The inner input pipe is connected to the inner output pipe 12 through a plurality of heat conducting pipes 13. The constant temperature device 6 comprises a recovery box 21, a recovery box output pump 22, a heat exchange box 23, a heat exchange plate 24, an output pipe 25, a temperature A temperature detector 26, a heating device 27, an insulation box 28, and an output pump 29 are provided. The upper end of the recovery box 21 is connected to the heat output pipe 4, the recovery box 21 is connected to the output pipe 25, a recovery box output pump 22 is provided on the output pipe 25, and a heat exchange box 23 is provided at the rear end of the recovery box output pump 22. The output pipe 25 passes through the heat exchange box 23, and the output pipe 25 in the heat exchange box 23 is connected to a plurality of heat exchange fins 24. A temperature detector 26 is provided on the output pipe 25 at the rear end of the heat exchange box 23, the output pipe 25 is connected to the insulation box 28, the heat exchange box 23 is connected to the heating device 27, the output pipe 25 of the insulation box 28 is connected to the output pump 29, and the output pump 29 is connected to the heat input pipe 5.

[0019] The recovery box 21 and the insulation box 28 are both provided with pressure relief valves.

[0020] A heat insulation layer is provided on the inner side of the shell of the thermostat 6 .

[0021] The heating device 27 is an electric heater structure, and is connected to the heat exchange box 23 through an input pipe and an output pipe 25 , and a fan blade for providing air power is provided on one of the input pipe and the output pipe 25 .

[0022] The heating device 27 may also be a structure that uses a compressor for refrigeration, providing a solution for low-temperature reactions.

[0023] Referring to the preparation method in 2015102610891, different reaction temperatures need to be used in different steps to achieve optimal production efficiency. At high temperatures, oil should be used as the working medium to reduce volatility. At low temperatures, water with antifreeze added should be used as the working medium to reduce pipeline resistance.

[0024] At this time, multiple devices can be set at different cooling or heating temperatures to meet the production needs of different steps. The use of almost identical structures can greatly reduce the cost of equipment use and maintenance.

[0025] The compressor refrigeration structure and process used in this solution are well-known. For example, a vapor compression refrigerator consists of a compressor, condenser, evaporator, throttling mechanism, and auxiliary equipment. The refrigerant in this type of refrigerator can liquefy at room temperature or low temperatures, and periodically condenses and evaporates during operation. Commonly used vapor compression refrigerators include single-stage, two-stage, and cascade types.

[0026] The constant temperature device 6 for the reaction of liquid lithium bis(fluorosulfonyl)imide improves the existing technology. In actual use, there are still substances such as hydrochloric acid that are easily volatile when heated in the reactants. It is necessary to control the reaction temperature to reduce the loss caused by material volatilization. At the same time, controlling the reaction temperature is also conducive to the forward progress of the reaction. By setting the constant temperature device 6, the reactants can be kept at the set temperature, which can effectively reduce the volatilization of the materials and also improve the reaction efficiency.

[0027] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims be included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0028] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A constant temperature device for liquid lithium bis(fluorosulfonyl)imide reaction, characterized by: Its structure includes a reaction tank, a material output pipe, a material input pipe, a heat output pipe, a heat input pipe, and a constant temperature device. The material output pipe and the material input pipe are provided on the reaction tank, and the reaction tank is connected to the constant temperature device through the heat output pipe and the heat input pipe. The reaction tank also includes a water bath layer, an inner output pipe, a heat conduction pipe, and an inner input pipe. The water bath layer is in communication with the inner output pipe and the inner input pipe, and the inner input pipe is connected to the inner output pipe through a plurality of heat conduction pipes. The constant temperature device includes a recovery box, a recovery box output pump, a heat exchange box, heat exchange fins, an output pipe, a temperature detector, a heating device, an insulation box, and an output pump. The upper end of the recovery box is connected to the heat output pipe, the recovery box is connected to the output pipe, the recovery box output pump is provided on the output pipe, a heat exchange box is provided at the rear end of the recovery box output pump, the output pipe passes through the heat exchange box, the output pipe in the heat exchange box is connected to a plurality of heat exchange fins, a temperature detector is provided on the output pipe at the rear end of the heat exchange box, the output pipe is connected to the insulation box, the heat exchange box is connected to the heating device, the output pipe of the insulation box is connected to the output pump, and the output pump is connected to the heat input pipe.

2. The constant temperature device for liquid lithium bis(fluorosulfonyl)imide reaction according to claim 1, characterized in that: The recovery box and the insulation box are both provided with pressure relief valves.

3. The constant temperature device for liquid lithium bis(fluorosulfonyl)imide reaction according to claim 1, characterized in that: A heat insulation layer is provided on the inner side of the shell of the thermostat.

4. The constant temperature device for liquid lithium bis(fluorosulfonyl)imide reaction according to claim 1, characterized in that: The heating device is an electric heater structure, and is connected to the heat exchange box through an input pipe and an output pipe, and a fan blade for providing air power is provided on one of the input pipe and the output pipe.

5. The constant temperature device for liquid lithium bis(fluorosulfonyl)imide reaction according to claim 4, characterized in that: The heating device may also be a structure that uses a compressor for refrigeration.

Images