Device for preparing methyl ethyl carbonate

Abstract

The utility model relates to the technical field of preparation of methyl ethyl carbonate, in particular to a device for preparing methyl ethyl carbonate, which comprises a preparation tank, a stirring component is mounted in the preparation tank, and a lifting disc can enable production raw materials of methyl ethyl carbonate to enter an inner cavity of the lifting disc from a circular hole of an upper annular sheet in the lifting process; the stirring and mixing efficiency is preliminarily improved, meanwhile, the multiple stirring paddles can be driven to slide in a lifting mode, normal horizontal rotary stirring of the stirring paddles is not affected, and the stirring paddles can conduct lifting, mixing and stirring while horizontally stirring and mixing methyl ethyl carbonate production raw materials. The heating resistance ring is sleeved on the lifting rod for driving the lifting disc to lift and slide, and the heating resistance ring is electrified to enable the heating resistance ring, the lifting rod and the whole lifting disc to be electrified and heated, so that the heating efficiency of the methyl ethyl carbonate production raw materials can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ethyl methyl carbonate preparation, in particular to a device for preparing ethyl methyl carbonate. Background Art

[0002] Ethyl methyl carbonate is an organic compound, a colorless transparent liquid, insoluble in water, can be used in organic synthesis, and is an excellent solvent for lithium-ion battery electrolyte. Ethyl methyl carbonate should be stored in a cool, ventilated, dry place and stored and transported in accordance with the regulations for flammable chemicals.

[0003] Ethyl methyl carbonate can be prepared by reacting methyl chloroformate with ethanol. The specific preparation steps are to add methanol, ethanol and dimethyl carbonate into a reactor, add a catalyst, and carry out an esterification reaction at a suitable temperature and pressure to generate ethyl methyl carbonate and by-products such as formic acid and acetic acid.

[0004] The Chinese utility model patent with the authorization announcement number CN219129246U states in its specification that "the stirring element is used to stir and mix the raw materials, the heating block generates heat and transfers the heat to the tank body and the raw materials therein, and the stirring element is used to uniformly heat the raw materials, thereby improving the heating efficiency and reaction efficiency of the raw materials and improving the production efficiency of ethyl methyl carbonate";

[0005] Although the method of transferring heat by adding stirring and heating blocks can improve the esterification reaction efficiency of the production raw materials to a certain extent, the stirring component can only rotate horizontally and cannot be raised and lowered synchronously, and the stirring and mixing effect is not good. At the same time, the heating block is fixed in the preparation tank, and it cannot guarantee uniformity and stability during the contact process with the production raw materials in the preparation tank. Therefore, the actual effect of improving the reaction efficiency is not ideal. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a device for preparing ethyl methyl carbonate, which can effectively solve the problem that the prior art has a poor effect in improving reaction efficiency.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The utility model provides a device for preparing ethyl methyl carbonate, comprising a preparation tank, wherein a stirring component is arranged in the preparation tank, the stirring component comprises a stirring drum, the stirring drum is rotatably arranged in the inner tank cavity of the preparation tank, a stirring rod is lifted and slidably arranged in the inner cylinder cavity of the stirring drum, a plurality of stirring paddles are vertically fixedly arranged on the outer rod wall of the stirring rod, a fixing plate is also fixedly sleeved on the outer rod wall of the stirring rod, a limiting ring is fixedly installed on the outer ring wall of the fixing plate, two lifting rods are lifted and slidably arranged in the inner tank cavity of the preparation tank, the lifting plate is vertically fixedly arranged on the bottom ends of the two lifting rods, annular sheets are embedded and arranged on the top and bottom ends of the lifting plate, a plurality of circular holes are opened on the top ends of the two annular sheets, an annular opening is opened on the top end of the lifting plate through the bottom end, the fixing plate is rotatably arranged in the annular opening in a matching manner, an annular limiting groove is opened on the inner ring wall of the annular opening, the limiting ring is rotatably arranged in the annular limiting groove in a matching manner, and a heating resistor ring is sleeved on the outer rod wall of the lifting rod.

[0009] Furthermore, two L-shaped feed pipes are vertically fixedly installed on the outer tank wall of the preparation tank, one end of the two L-shaped feed pipes is connected to the inner cavity of the preparation tank, and the other end is fixedly installed with a receiving hopper, and a first solenoid valve is installed at the connection between the two L-shaped feed pipes and the corresponding receiving hopper.

[0010] Furthermore, a discharge pipe is installed at the bottom of the preparation tank, one end of the discharge pipe is connected to the tank cavity in the preparation tank, and a second solenoid valve is installed at the connection point between the discharge pipe and the tank cavity in the preparation tank.

[0011] Furthermore, a support frame is provided on the outer tank wall of the preparation tank, and the support frame includes a support plate and a support column. The support plate is fixedly mounted on the outer tank wall of the preparation tank, and a distribution box is fixedly installed on the top of the support plate. The distribution box is electrically connected to the heating resistance ring, and the support column is vertically fixedly installed on the bottom end of the support plate.

[0012] Furthermore, the stirring assembly also includes a driving motor, the output end of which extends through the tank cavity of the preparation tank and is vertically fixedly installed on the top of the stirring drum.

[0013] Furthermore, two lifting cylinders are vertically fixedly installed on the top of the preparation tank, and the output ends of the two lifting cylinders extend into the tank cavity inside the preparation tank and are fixedly connected to the corresponding lifting rods respectively.

[0014] Compared with the known prior art, the technical solution provided by the utility model has the following beneficial effects:

[0015] 1. A lifting plate is set in the preparation tank. Ring sheets are embedded and installed at the top and bottom of the lifting plate. A number of circular holes are provided on the two ring sheets. During the lifting process, the lifting plate can allow the raw materials for ethyl methyl carbonate production to enter the inner cavity of the lifting plate from the circular holes of the upper ring sheet and be discharged from the circular holes of the lower ring sheet, thereby preliminarily improving the stirring and mixing efficiency;

[0016] 2. The lifting plate can drive several stirring paddles to lift and slide while lifting, without affecting the normal horizontal rotation and stirring of the stirring paddles, so that the stirring paddles can lift and stir the raw materials for ethyl methyl carbonate production while stirring and mixing them horizontally, further improving the stirring and mixing efficiency;

[0017] 3. A heating resistance ring is mounted on the lifting rod that drives the lifting plate to rise and fall. By energizing the heating resistance ring, the heating ring, the lifting rod and the entire lifting plate are energized and heated, thereby improving the heating efficiency of the raw materials for the production of ethyl methyl carbonate. The lifting plate is heated while the lifting plate is rising and falling, and the two will not interfere with each other, which is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the preparation tank of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the stirring assembly of the utility model;

[0022] Figure 4 This is a schematic diagram of the installation structure of the lifting plate of the utility model.

[0023] The numbers in the figure represent: 1. Preparation tank; 11. L-shaped feed pipe; 12. Receiving hopper; 13. First solenoid valve; 14. Discharge pipe; 15. Second solenoid valve; 16. Support frame; 2. Drive motor; 21. Mixing drum; 22. Mixing rod; 23. Mixing paddle; 24. Fixed plate; 25. Limiting ring; 3. Lifting cylinder; 31. Lifting rod; 4. Lifting plate; 41. Annular mounting cavity; 42. Annular sheet; 43. Round hole; 44. Annular mouth; 45. Annular limiting groove; 5. Distribution box; 51. Heating resistor ring. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The utility model is further described below in conjunction with embodiments.

[0026] Example 1

[0027] Reference Figure 1-4 , which is the first embodiment of the utility model, discloses a device for preparing ethyl methyl carbonate, including a preparation tank 1, the preparation tank 1 has good sealing performance and will not leak, and a booster pump and a sensor for detecting pressure (not shown in the figure) are arranged in the preparation tank 1, and a stirring assembly is installed in the preparation tank 1, and the stirring assembly includes a stirring drum 21, and the stirring drum 21 is rotatably installed in the inner tank cavity of the preparation tank 1, and a stirring rod 22 is installed in the inner cylinder cavity of the stirring drum 21 in a lifting and sliding manner, and a plurality of stirring paddles 23 are vertically fixedly installed on the outer rod wall of the stirring rod 22, and the stirring rod 22 is provided with a plurality of stirring paddles 23, and the stirring rod 22 is provided with a plurality of stirring paddles 23, and the stirring paddles 23 are ... Figure 3 It can be known that the plurality of stirring paddles 23 are inclined in design to reduce the resistance encountered during stirring. The outer rod wall of the stirring rod 22 is also fixedly sleeved with a fixing plate 24, and the outer ring wall of the fixing plate 24 is fixedly installed with a limiting ring 25. Figure 3 It can be known that the thickness of the limit ring 25 is smaller than that of the fixed plate 24, and the two lifting rods 31 are lifted and slidably installed in the inner tank cavity of the preparation tank 1. The lifting plate 4 is vertically fixedly installed at the bottom ends of the two lifting rods 31. An annular installation cavity 41 is penetrated between the top and bottom ends of the lifting plate 4, and an annular sheet 42 is embedded and installed at the upper cavity top and the lower cavity bottom of the annular installation cavity 41. The annular sheet 42 also plays a role in reinforcing the lifting plate 4. The top ends of the two annular sheets 42 are penetrated through the bottom ends to form a plurality of circular holes 43, and the top end of the lifting plate 4 is penetrated through the bottom end to form an annular opening 44, and the fixed plate 24 is adaptively rotatably installed in the annular opening 44, and the inner ring wall of the annular opening 44 is provided with an annular limit groove 45, and the limit ring 25 is adaptively rotatably installed in the annular limit groove 45, and the heating resistor ring 51 is sleeved on the outer rod wall of the lifting rod 31.

[0028] Example 2

[0029] Reference Figure 1-4, which is the second embodiment of the utility model. This embodiment is different from the first embodiment in that: two L-shaped feed pipes 11 are vertically fixedly installed on the outer tank wall of the preparation tank 1, one end of the two L-shaped feed pipes 11 is connected to the inner cavity of the preparation tank 1, and the other end is fixedly installed with a receiving hopper 12. The inner hopper wall of the receiving hopper 12 is provided with a threaded groove, which is convenient for threaded docking with the output pipeline of the production raw materials. The two L-shaped feed pipes 11 and the corresponding receiving hoppers 12 are connected at the connection point to facilitate sealing the entire preparation tank 1. A discharge pipe 14 is installed at the lower bottom of the preparation tank 1. One end of the discharge pipe 14 is connected to the inner tank cavity of the preparation tank 1. A second solenoid valve 15 is installed at the connection point between the discharge pipe 14 and the inner tank cavity of the preparation tank 1. The outer tank wall of the preparation tank 1 is provided with a support frame 16, and the support frame 16 It includes a support plate and a support column. The support plate is fixedly mounted on the outer tank wall of the preparation tank 1. A distribution box 5 is fixedly installed on the top of the support plate. The distribution box 5 is electrically connected to the heating resistor ring 51. The inner diameter of the heating resistor ring 51 is consistent with the outer diameter of the lifting rod 31. Therefore, no matter where the lifting rod 31 is lifted or slid, it remains electrically connected to the heating resistor ring 51. The support column is vertically fixedly installed on the bottom end of the support plate. The stirring assembly also includes a drive motor 2. The output end of the drive motor 2 extends through the inner tank cavity of the preparation tank 1 and is vertically fixedly installed on the top of the stirring drum 21. Two lifting cylinders 3 are also vertically fixedly installed on the top of the preparation tank 1. The output ends of the two lifting cylinders 3 both extend into the inner tank cavity of the preparation tank 1 and are respectively fixedly connected to the corresponding lifting rods 31.

[0030] The remaining structures are the same as those of Example 1.

[0031] First, the two receiving hoppers 12 are connected to the ethyl methyl carbonate production raw materials respectively, and then the first solenoid valve 13 is opened, and the second solenoid valve 15 is closed, and the ethyl methyl carbonate production raw materials with equal proportions are poured into the inner cavity of the preparation tank 1 through the two L-shaped feeding pipes 11;

[0032] Secondly, the drive motor 2 is started, which in turn drives the mixing drum 21 to rotate, and also drives the mixing rod 22 to rotate (the inner cylinder cavity of the mixing drum 21 is a square cavity, as shown in the attached manual). Figure 2 and 3 It can be known that the stirring rod 22 is a square rod, so the stirring rod 22 is limitedly slidably installed in the inner cylinder cavity of the stirring cylinder 21), thereby driving a plurality of stirring paddles 23 to perform preliminary stirring and mixing of the ethyl methyl carbonate production raw materials in the preparation tank 1;

[0033] Then, the two lifting cylinders 3 are started synchronously, thereby driving the lifting plate 4 to lift and slide in the tank cavity of the preparation tank 1 through the corresponding lifting rod 31, so that the raw materials for producing ethyl methyl carbonate enter the inner cavity of the lifting plate 4 from the circular hole 43 of the upper annular plate 42, and are discharged from the circular hole 43 of the lower annular plate 42, thereby increasing the mixing mode and improving the stirring and mixing efficiency. In addition, since the fixed plate 24 and the limiting ring 25 of the outer rod wall of the stirring rod 22 are rotatably installed in the annular opening 44 and the annular limiting groove 45 of the lifting plate 4, respectively, the lifting and sliding of the lifting plate 4 will drive the stirring rod 22 and a plurality of stirring paddles 23 to lift and slide synchronously, and will not affect the horizontal rotation stirring of the stirring paddle 23, thereby further improving the stirring and mixing efficiency.

[0034] Finally, power is supplied to the heating resistor ring 51 through the distribution box 5. Since the heating resistor ring 51 is mounted on the outer rod wall of one of the lifting rods 31, the lifting rod 31 and the entire lifting plate 4 can be powered on and heated. At this time, the lifting plate 4 is lifting and sliding in the ethyl methyl carbonate production raw materials, so the contact frequency between the ethyl methyl carbonate production raw materials and the lifting plate 4 can be increased, thereby ultimately improving the production efficiency of the esterification reaction of the ethyl methyl carbonate production raw materials.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. These modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for preparing ethyl methyl carbonate, comprising a preparation tank (1), characterized in that: Also includes: A stirring assembly is installed in a preparation tank (1), the stirring assembly comprising a stirring drum (21), the stirring drum (21) being rotatably installed in an inner tank cavity of the preparation tank (1), a stirring rod (22) being installed in the inner tank cavity of the stirring drum (21) in a lifting and sliding manner, a plurality of stirring paddles (23) being vertically fixedly installed on the outer rod wall of the stirring rod (22), a fixing plate (24) being fixedly mounted on the outer rod wall of the stirring rod (22), and a limiting ring (25) being fixedly installed on the outer ring wall of the fixing plate (24); Two lifting rods (31) are installed in an ascending and descending manner and are slidably mounted in the inner tank cavity of the preparation tank (1); A lifting plate (4) is vertically fixedly installed at the bottom ends of the two lifting rods (31); an annular installation cavity (41) is provided between the top and bottom ends of the lifting plate (4); an annular sheet (42) is embedded and installed at the upper cavity top and the lower cavity bottom of the annular installation cavity (41); the top ends of the two annular sheets (42) are provided with a plurality of circular holes (43) at the bottom ends; an annular opening (44) is provided at the top end and the bottom end of the lifting plate (4); the fixed plate (24) is rotatably installed in the annular opening (44); an annular limiting groove (45) is provided on the inner ring wall of the annular opening (44); and the limiting ring (25) is rotatably installed in the annular limiting groove (45); The heating resistor ring (51) is sleeved on the outer rod wall of the lifting rod (31).

2. A device for preparing ethyl methyl carbonate according to claim 1, characterized in that, Two L-shaped feed pipes (11) are vertically fixedly installed on the outer tank wall of the preparation tank (1), one end of the two L-shaped feed pipes (11) is connected to the inner cavity of the preparation tank (1), and the other end is fixedly installed with a receiving hopper (12), and a first solenoid valve (13) is installed at the connection point between the two L-shaped feed pipes (11) and the corresponding receiving hopper (12).

3. A device for preparing ethyl methyl carbonate according to claim 2, characterized in that, A discharge pipe (14) is installed at the bottom of the preparation tank (1), one end of the discharge pipe (14) is connected to the inner tank cavity of the preparation tank (1), and a second solenoid valve (15) is installed at the connection point between the discharge pipe (14) and the inner tank cavity of the preparation tank (1).

4. A device for preparing ethyl methyl carbonate according to claim 3, characterized in that, The outer tank wall of the preparation tank (1) is provided with a support frame (16), and the support frame (16) includes a support plate and a support column. The support plate is fixedly sleeved on the outer tank wall of the preparation tank (1), and a distribution box (5) is fixedly installed on the top of the support plate. The distribution box (5) is electrically connected to the heating resistance ring (51), and the support column is vertically fixedly installed on the bottom end of the support plate.

5. A device for preparing ethyl methyl carbonate according to claim 4, characterized in that, The stirring assembly further comprises a driving motor (2), the output end of which extends through the tank cavity of the preparation tank (1) and is vertically fixedly mounted on the top of the stirring drum (21).

6. A device for preparing ethyl methyl carbonate according to claim 5, characterized in that, Two lifting cylinders (3) are also vertically fixedly installed on the top of the preparation tank (1), and the output ends of the two lifting cylinders (3) extend into the tank cavity inside the preparation tank (1) and are respectively fixedly connected to corresponding lifting rods (31).

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