CN220919219U - Device for preparing methyl ethyl carbonate by using membrane reactor - Google Patents
Device for preparing methyl ethyl carbonate by using membrane reactor Download PDFInfo
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- CN220919219U CN220919219U CN202322734113.1U CN202322734113U CN220919219U CN 220919219 U CN220919219 U CN 220919219U CN 202322734113 U CN202322734113 U CN 202322734113U CN 220919219 U CN220919219 U CN 220919219U
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- Prior art keywords
- membrane
- membrane reactor
- molecular sieve
- storage tank
- carbonate
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- 239000012528 membrane Substances 0.000 title claims abstract description 89
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 239000002808 molecular sieve Substances 0.000 claims abstract description 34
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 34
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000003860 storage Methods 0.000 claims abstract description 26
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims abstract description 24
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 238000000926 separation method Methods 0.000 claims abstract description 10
- 239000006200 vaporizer Substances 0.000 claims abstract description 10
- 235000019441 ethanol Nutrition 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 230000002194 synthesizing effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000009977 dual effect Effects 0.000 abstract description 2
- 238000005809 transesterification reaction Methods 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000000895 extractive distillation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000066 reactive distillation Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model discloses a device for preparing methyl ethyl carbonate by using a membrane reactor, which comprises a dimethyl carbonate storage tank and an absolute ethyl alcohol storage tank. The dimethyl carbonate storage tank and the absolute ethyl alcohol storage tank are respectively connected with a raw material preheater, the raw material preheater is connected with a vaporizer, and the vaporizer is connected with a superheater. The superheater is connected with an inlet at the top of the membrane reactor, a water-cooling heat exchanger I is arranged at an outlet at the bottom of the membrane reactor, and a water-cooling heat exchanger II is arranged at an outlet at the side wall of the membrane reactor. The membrane reactor has the dual functions of reaction and separation. The molecular sieve membrane not only plays a role in reaction, but also can utilize the selectivity of the molecular sieve membrane to the mixed steam after the reaction, and the product micromolecular methanol is permeated to play a role in separation, so that the production process flow is shortened, the operation is convenient, the energy consumption and the equipment investment are reduced, and the production cost is greatly reduced.
Description
Technical Field
The utility model relates to the technical field of production of methyl ethyl carbonate, in particular to a device for preparing methyl ethyl carbonate by using a membrane reactor.
Background
Methyl ethyl carbonate (EMC) is taken as a solvent of a novel excellent lithium ion battery electrolyte, and the synthesis and application of the methyl ethyl carbonate are getting more and more attention. The lithium ion battery contains active reactive groups such as methyl, ethyl, carbonyl and the like, can be used as a fine synthesis intermediate, can react with alcohols, phenols, amines, esters and the like, and is applied to a plurality of rechargeable batteries such as metal lithium batteries. The lithium ion battery has the advantages of high solubility to lithium salt, safety and stability, high discharge capacity and energy density of the battery, long cycle life, good low-temperature service performance and the like. The asymmetry of EMC molecular structure makes it also a clear advantage in terms of solvents for paints, cellulose, resins, etc.
A relatively common method for producing methyl ethyl carbonate at present is transesterification between dimethyl carbonate and ethanol. After the reaction in the reactive distillation column, the products are separated and purified by adopting methods such as pressure swing distillation or extractive distillation, etc. under the action of the catalyst, the process is complex, the energy consumption is high, and the equipment investment is also large. And the reaction of dimethyl carbonate and ethanol is thermodynamically limited, so that the conversion rate is difficult to improve.
Disclosure of Invention
In order to overcome the defects of the technology, the utility model aims to provide a device for preparing methyl ethyl carbonate by using a membrane reactor. The device has the double functions of reaction and separation, not only simplifies the reaction flow, reduces the energy consumption and the equipment investment, but also can separate and extract the methanol during the reaction, so that the reaction can be continuously carried out in the forward and backward directions, and the conversion rate is improved.
The technical scheme adopted for solving the technical problems is as follows:
An apparatus for preparing methyl ethyl carbonate by using a membrane reactor, which comprises a dimethyl carbonate storage tank (1) and an absolute ethyl alcohol storage tank (2), and is characterized in that: the device is characterized in that the dimethyl carbonate storage tank (1) and the absolute ethyl alcohol storage tank (2) are respectively connected with the raw material preheater (5), the raw material preheater (5) is connected with the vaporizer (6), the vaporizer (6) is connected with the superheater (7), the superheater (7) is connected with the top inlet of the membrane reactor (8), the water-cooling heat exchanger I (10) is arranged at the bottom outlet of the membrane reactor (8), and the water-cooling heat exchanger II (11) is arranged at the side wall outlet of the membrane reactor.
The dimethyl carbonate storage tank (1) is connected with the raw material preheater (5) through a pipeline and is connected with the metering pump I (3); the absolute ethyl alcohol storage tank (2) is connected with the raw material preheater (5) through a pipeline and a metering pump II (4).
The membrane reactor (8) is connected with the water-cooling heat exchanger I (10) through a pipeline and a vacuum pump (9).
The transesterification reaction of dimethyl carbonate and absolute ethanol is carried out in a membrane reactor (8).
The membrane reactor (8) is a molecular sieve membrane reactor and comprises a plurality of membrane tubes.
The membrane tube is sequentially provided with a membrane tube made of porous alpha-Al 2O3 material, a hydrophilic LTA molecular sieve membrane layer and a NaY molecular sieve membrane layer from inside to outside.
The hydrophilic LTA molecular sieve membrane layer is used for selective methanol removal and separation, and NaY molecular sieve membrane layer is loaded on the surface of the LTA molecular sieve membrane layer and used for synthesizing methyl ethyl carbonate EMC by using ethanol and dimethyl carbonate DMC.
The thickness of the hydrophilic LTA molecular sieve membrane layer is 6-8 mu m, the thickness of the NaY molecular sieve membrane layer is 6-8 mu m, and the diameter of the membrane tube made of porous alpha-Al 2O3 material is 2-3mm.
Compared with the prior art, the utility model has the following beneficial effects:
The utility model utilizes the dual functional characteristics of membrane reactor reaction and separation, the molecular sieve membrane not only plays a role in reaction, but also can utilize the selectivity of the molecular sieve membrane to the mixed steam after reaction, and the product micromolecular methanol is permeated, thereby playing a role in separation, shortening the production process flow, being convenient to operate, reducing the energy consumption and the equipment investment, and greatly reducing the production cost.
Drawings
FIG. 1 is a schematic view showing the structure of an embodiment of an apparatus for producing ethylmethyl carbonate using a membrane reactor according to the present utility model;
FIG. 2 is a schematic view of the internal structure of a membrane tube of the membrane reactor;
Reference numerals and names in the drawings are as follows:
1. A dimethyl carbonate storage tank; 2. an absolute ethanol storage tank; 3. a metering pump I; 4. a metering pump II; 5. a raw material preheater; 6. a vaporizer; 7. a superheater; 8. a membrane reactor; 9. a vacuum pump; 10. a water-cooled heat exchanger I; 11. a water-cooling heat exchanger II; 8-1, a porous alpha-Al 2O3 membrane tube; 8-2, a hydrophilic LTA molecular sieve membrane layer; 8-3, naY molecular sieve membrane layer.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in FIG. 1, the device for preparing methyl ethyl carbonate by using the membrane reactor comprises a dimethyl carbonate storage tank (1) and an absolute ethyl alcohol storage tank (2). The device is characterized in that the dimethyl carbonate storage tank (1) and the absolute ethyl alcohol storage tank (2) are respectively connected with the raw material preheater (5), the raw material preheater (5) is connected with the vaporizer (6), the vaporizer (6) is connected with the superheater (7), the superheater (7) is connected with the top inlet of the membrane reactor (8), the outlet at the bottom of the membrane reactor (8) is provided with the water-cooling heat exchanger I (10), and the outlet of the side wall is provided with the water-cooling heat exchanger II (11).
Specifically, the dimethyl carbonate storage tank (1) is connected with the raw material preheater (5) through a pipeline and the metering pump I (3).
Specifically, the absolute ethyl alcohol storage tank (2) is connected with the raw material preheater (5) through a pipeline and a metering pump II (4).
Specifically, the membrane reactor (8) is connected with the water-cooling heat exchanger I (10) through a pipeline and a vacuum pump (9).
Specifically, the transesterification reaction of dimethyl carbonate and absolute ethanol is performed in a membrane reactor (8).
Specifically, the membrane reactor (8) is a molecular sieve membrane reactor and consists of a plurality of membrane tubes, wherein the inner layer of each membrane tube is a membrane tube 8-1 made of porous alpha-Al 2O3, and the hydrophilic LTA molecular sieve membrane layer 8-2 and the NaY molecular sieve membrane layer 8-3 are sequentially wrapped outside the membrane tube 8-1 made of porous alpha-Al 2O3 from inside to outside.
The thickness of the hydrophilic LTA molecular sieve membrane layer is 6-8 mu m, the thickness of the NaY molecular sieve membrane layer is 6-8 mu m, and the diameter of the membrane tube made of porous alpha-Al 2O3 material is 2-3mm.
In the membrane reactor, a hydrophilic LTA molecular sieve membrane is used for selective methanol removal and separation, and a NaY molecular sieve membrane is loaded on the surface of the LTA molecular sieve membrane and used for synthesizing methyl ethyl carbonate EMC by using ethanol and dimethyl carbonate DMC. Through LTA molecular sieve membrane separation and NaY molecular sieve catalytic coupling, reaction separation integration is realized.
Working principle: the dimethyl carbonate storage tank (1) and the absolute ethyl alcohol storage tank (2) are connected to the raw material preheater (5) through a first metering pump (3) and a second metering pump (4) respectively, then enter the vaporizer (6) to gasify raw materials, and enter the dimethyl carbonate and the absolute ethyl alcohol from the top inlet of the membrane reactor (8) in a gas phase state through the heater (7), so that the transesterification reaction is carried out under the catalysis of the NaY molecular sieve loaded on the outermost layer of the membrane tube. After the reaction, the generated micromolecular methanol vapor passes through a hydrophilic LTA molecular sieve membrane under the action of a vacuum pump (9), flows into a bottom outlet from a membrane pipe made of porous alpha-Al 2O3 material, and is condensed by a water-cooling heat exchanger I (10) and then extracted. And condensing residual macromolecule mixture steam from the outlet of the side wall of the membrane reactor (8) through a second water-cooling heat exchanger (11) and then extracting.
In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "provided with," "connected to," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The utility model is applicable to the prior art where it is not described.
Claims (7)
1. An apparatus for preparing methyl ethyl carbonate by using a membrane reactor, which comprises a dimethyl carbonate storage tank (1) and an absolute ethyl alcohol storage tank (2), and is characterized in that: the device is characterized in that the dimethyl carbonate storage tank (1) and the absolute ethyl alcohol storage tank (2) are respectively connected with the raw material preheater (5), the raw material preheater (5) is connected with the vaporizer (6), the vaporizer (6) is connected with the superheater (7), the superheater (7) is connected with the top inlet of the membrane reactor (8), the outlet at the bottom of the membrane reactor (8) is provided with the water-cooling heat exchanger I (10), and the outlet of the side wall is provided with the water-cooling heat exchanger II (11).
2. The apparatus for producing ethylmethyl carbonate using a membrane reactor according to claim 1, wherein: the dimethyl carbonate storage tank (1) is connected with the raw material preheater (5) through a pipeline and is connected with the metering pump I (3); the absolute ethyl alcohol storage tank (2) is connected with the raw material preheater (5) through a pipeline and a metering pump II (4).
3. The apparatus for producing ethylmethyl carbonate using a membrane reactor according to claim 1, wherein: the membrane reactor (8) is connected with the water-cooling heat exchanger I (10) through a pipeline and a vacuum pump (9).
4. The apparatus for producing ethylmethyl carbonate using a membrane reactor according to claim 1, wherein: the membrane reactor (8) is a molecular sieve membrane reactor and comprises a plurality of membrane tubes.
5. The apparatus for producing ethylmethyl carbonate using a membrane reactor according to claim 4, wherein: the membrane tube is sequentially provided with a membrane tube made of porous alpha-Al 2O3 material, a hydrophilic LTA molecular sieve membrane layer and a NaY molecular sieve membrane layer from inside to outside.
6. An apparatus for producing ethylmethyl carbonate using a membrane reactor according to claim 5, wherein: the hydrophilic LTA molecular sieve membrane layer is used for selective methanol removal and separation, and NaY molecular sieve membrane layer is loaded on the surface of the LTA molecular sieve membrane layer and used for synthesizing methyl ethyl carbonate EMC by using ethanol and dimethyl carbonate DMC.
7. An apparatus for producing ethylmethyl carbonate using a membrane reactor according to claim 5, wherein: the thickness of the hydrophilic LTA molecular sieve membrane layer is 6-8 mu m, the thickness of the NaY molecular sieve membrane layer is 6-8 mu m, and the diameter of the membrane tube made of porous alpha-Al 2O3 material is 2-3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322734113.1U CN220919219U (en) | 2023-10-12 | 2023-10-12 | Device for preparing methyl ethyl carbonate by using membrane reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322734113.1U CN220919219U (en) | 2023-10-12 | 2023-10-12 | Device for preparing methyl ethyl carbonate by using membrane reactor |
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| Publication Number | Publication Date |
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| CN220919219U true CN220919219U (en) | 2024-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322734113.1U Active CN220919219U (en) | 2023-10-12 | 2023-10-12 | Device for preparing methyl ethyl carbonate by using membrane reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220919219U (en) |
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2023
- 2023-10-12 CN CN202322734113.1U patent/CN220919219U/en active Active
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