CN209872829U - Dimethyl carbonate and methyl ethyl carbonate joint production device - Google Patents
Dimethyl carbonate and methyl ethyl carbonate joint production device Download PDFInfo
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- CN209872829U CN209872829U CN201920188854.5U CN201920188854U CN209872829U CN 209872829 U CN209872829 U CN 209872829U CN 201920188854 U CN201920188854 U CN 201920188854U CN 209872829 U CN209872829 U CN 209872829U
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Abstract
A dimethyl carbonate and methyl ethyl carbonate joint production device which is characterized in that: comprises a dimethyl carbonate reaction tower, a pressurized rectifying tower, a dimethyl carbonate product tower, a methyl ethyl carbonate reaction tower and a methyl ethyl carbonate refining tower; the dimethyl carbonate reaction tower adopts a dividing wall type rectifying tower, wherein A, B, C feed inlets are respectively arranged, and the feed inlet A and the feed inlet B, C are respectively positioned at two sides of the dividing wall.
Description
Technical Field
The utility model belongs to the fine chemical industry field involves a dimethyl carbonate and methyl ethyl carbonate joint production device, is applicable to the joint unit of ester exchange method production dimethyl carbonate and ester exchange method production methyl ethyl carbonate industrial production.
Background
Dimethyl carbonate is a green organic compound, can replace virulent phosgene and dimethyl sulfate as a carbonylation agent and a toluidizing agent, and is applied to the production of pesticides, medicines, polycarbonate, polyurethane and the like; can also be used as a gasoline additive to improve the octane number of gasoline, can also be used as a coating solvent, and is widely used. Methyl ethyl carbonate is also called ethyl methyl carbonate, is colorless transparent liquid, is insoluble in water, can be used for organic synthesis, and is an excellent solvent of the lithium ion battery electrolyte. The ethyl methyl carbonate should be stored in a cool, ventilated and dry place for storage and transportation according to the regulations of flammable chemicals.
At present, ethyl methyl carbonate is produced by the ester exchange reaction of ethanol and dimethyl carbonate; in the production process of the ethyl methyl carbonate, the azeotrope of the dimethyl carbonate and the methanol is generated to be treated, and the treatment method is outsourcing or adding a treatment device; the price of the azeotrope is low, which causes the cost of the ethyl methyl carbonate product to increase, and the addition of a treatment device increases the investment and the energy consumption; in the production of dimethyl carbonate, the azeotrope of dimethyl carbonate and methanol needs to be treated by a pressurizing device, and the dimethyl carbonate product is also used as a raw material for producing ethyl methyl carbonate.
Disclosure of Invention
The utility model aims at providing a dimethyl carbonate and methyl ethyl carbonate joint production device unites dimethyl carbonate apparatus for producing and methyl ethyl carbonate apparatus for producing together, and the dimethyl carbonate product directly gets into methyl ethyl carbonate reaction tower as the raw materials, and the dimethyl carbonate that produces in the methyl ethyl carbonate production is carried to dimethyl carbonate reaction tower with methyl alcohol azeotrope and is handled, and process flow is simple and convenient, has reduced the equipment investment, has increased economic benefits.
In order to achieve the purpose, the utility model adopts the technical proposal that: a dimethyl carbonate and methyl ethyl carbonate joint production device which is characterized in that: comprises a dimethyl carbonate reaction tower, a pressurized rectifying tower, a dimethyl carbonate product tower, a methyl ethyl carbonate reaction tower and a methyl ethyl carbonate refining tower; wherein a propylene carbonate and methanol feeding pipeline is connected with a feed inlet of a dimethyl carbonate reaction tower A, a dimethyl carbonate reaction tower top discharging pipeline is connected with a feed inlet of a pressurized rectifying tower, a pressurized rectifying tower top discharging pipeline is connected with a feed inlet of a dimethyl carbonate reaction tower C, a pressurized rectifying tower bottom discharging pipeline is connected with a feed inlet of a dimethyl carbonate product tower, a dimethyl carbonate product tower top discharging pipeline is connected with a feed inlet of a pressurized rectifying tower, a dimethyl carbonate product tower product discharging pipeline is connected with a feed inlet of a methyl ethyl carbonate reaction tower, an ethanol feeding tank is circularly connected with a feed inlet of a methyl ethyl carbonate reaction tower, a methyl ethyl carbonate reaction tower top discharging pipeline is connected with a feed inlet of a dimethyl carbonate reaction tower B, a methyl ethyl carbonate reaction tower bottom discharging pipeline is connected with a feed inlet of a methyl ethyl carbonate refining tower, a methyl ethyl carbonate refining tower top discharging pipeline is connected with a feed inlet of a methyl ethyl carbonate reaction, and conveying the product of the ethyl methyl carbonate refining tower to the outside of the battery limits through a pipeline.
The dimethyl carbonate reaction tower adopts a dividing wall type rectifying tower, a feed inlet A and a feed inlet B, C are respectively positioned at two sides of a dividing wall, the horizontal positions of the feed inlet A and the feed inlet B are the same, a feed inlet C is positioned at a layer of filler below the feed inlets A and B, and the vertical distance between the feed inlet C and a feed inlet A, B is 5-8 m.
A column plate is arranged above the partition wall of the dimethyl carbonate reaction tower, the vertical distance from a feed inlet of A, B is L, the length of L is 1-2 m, and the optimal distance is 1.5-1.8 m.
Propylene carbonate and methanol are used as raw materials for producing dimethyl carbonate, the raw materials enter a dividing wall tower from a feed inlet of a dimethyl carbonate reaction tower A for reaction and rectification, the produced dimethyl carbonate and the methanol are discharged from the top of the tower in the form of normal-pressure azeotrope, wherein the proportion of the dimethyl carbonate is 27-32% (mass ratio), the dimethyl carbonate and the methanol enter a pressurized rectifying tower for rectification, after the composition of the azeotrope is changed, the azeotrope with the proportion of the dimethyl carbonate of 10-16% (mass ratio) returns to the dimethyl carbonate reaction tower from the top of the pressurized rectifying tower, and the dimethyl carbonate and the methanol enter the reaction tower from a feed inlet C; after the dimethyl carbonate crude product at the bottom of the pressurized rectifying tower is refined by a dimethyl carbonate product tower, a material containing methanol at the tower top returns to the pressurized rectifying tower for circular treatment, the dimethyl carbonate product directly serves as a raw material and enters a methyl ethyl carbonate reaction tower to be reacted and rectified with ethanol, the produced methanol and dimethyl carbonate are discharged from the tower top of the methyl ethyl carbonate reaction tower in an azeotrope form, wherein the proportion of the dimethyl carbonate is 25-30 percent (mass ratio), and the produced methanol enters a feed inlet of a dimethyl carbonate reaction tower B; the materials of the feed inlet C and the feed inlet B are dimethyl carbonate and methanol azeotrope, but the compositions are different, the feeding positions are different, and the feed inlet C is a layer of filler below the feed inlet B; the three feed inlets A and B, C are respectively positioned at two sides of the dividing wall, and a tower plate is added above the feed inlets to make the gas phase distribution more uniform.
The utility model has the advantages of it is following:
(1) the reaction device runs continuously, which is beneficial to the production operation and the device amplification during large-scale production;
(2) the two devices are integrated, thereby simplifying the flow and reducing the equipment investment;
(3) the device is produced jointly, energy consumption is reduced, and economic benefits are increased.
Drawings
Fig. 1 is a schematic view of the apparatus of the present invention.
FIG. 2 is a schematic diagram of a dimethyl carbonate reaction tower of the present invention.
Detailed Description
The invention will be further described with reference to the following examples, which are intended to illustrate, but not limit the invention.
A dimethyl carbonate and methyl ethyl carbonate joint production device which is characterized in that: comprises a dimethyl carbonate reaction tower, a pressurized rectifying tower, a dimethyl carbonate product tower, a methyl ethyl carbonate reaction tower and a methyl ethyl carbonate refining tower; wherein a propylene carbonate and methanol feeding pipeline is connected with a feed inlet of a dimethyl carbonate reaction tower A, a dimethyl carbonate reaction tower top discharging pipeline is connected with a feed inlet of a pressurized rectifying tower, a pressurized rectifying tower top discharging pipeline is connected with a feed inlet of a dimethyl carbonate reaction tower C, a pressurized rectifying tower bottom discharging pipeline is connected with a feed inlet of a dimethyl carbonate product tower, a dimethyl carbonate product tower top discharging pipeline is connected with a feed inlet of a pressurized rectifying tower, a dimethyl carbonate product tower product discharging pipeline is connected with a feed inlet of a methyl ethyl carbonate reaction tower, an ethanol feeding tank is circularly connected with a feed inlet of a methyl ethyl carbonate reaction tower, a methyl ethyl carbonate reaction tower top discharging pipeline is connected with a feed inlet of a dimethyl carbonate reaction tower B, a methyl ethyl carbonate reaction tower bottom discharging pipeline is connected with a feed inlet of a methyl ethyl carbonate refining tower, a methyl ethyl carbonate refining tower top discharging pipeline is connected with a feed inlet of a methyl ethyl carbonate reaction, and conveying the product of the ethyl methyl carbonate refining tower to the outside of the battery limits through a pipeline.
The dimethyl carbonate reaction tower adopts a dividing wall type rectifying tower, a feed inlet A and a feed inlet B, C are respectively positioned at two sides of a dividing wall, the horizontal positions of the feed inlet A and the feed inlet B are the same, and a feed inlet C is positioned at a layer of filler below the feed inlets A and the feed inlet B.
A column plate is arranged above the dividing wall of the dimethyl carbonate reaction tower, the vertical distance from the A, B feed inlet is L, and the length of L is between 1 meter and 2 meters.
Above-mentioned embodiment is only the utility model discloses an implementation form, according to the utility model provides an other deformations of scheme increase or reduce composition or step wherein, or will the utility model discloses be applied to with the utility model discloses close technical field all belongs to the utility model discloses a protection scope.
Claims (3)
1. A dimethyl carbonate and methyl ethyl carbonate joint production device which is characterized in that: comprises a dimethyl carbonate reaction tower, a pressurized rectifying tower, a dimethyl carbonate product tower, a methyl ethyl carbonate reaction tower and a methyl ethyl carbonate refining tower; wherein a propylene carbonate and methanol feeding pipeline is connected with a feed inlet of a dimethyl carbonate reaction tower A, a dimethyl carbonate reaction tower top discharging pipeline is connected with a feed inlet of a pressurized rectifying tower, a pressurized rectifying tower top discharging pipeline is connected with a feed inlet of a dimethyl carbonate reaction tower C, a pressurized rectifying tower bottom discharging pipeline is connected with a feed inlet of a dimethyl carbonate product tower, a dimethyl carbonate product tower top discharging pipeline is connected with a feed inlet of a pressurized rectifying tower, a dimethyl carbonate product tower product discharging pipeline is connected with a feed inlet of a methyl ethyl carbonate reaction tower, an ethanol feeding tank is circularly connected with a feed inlet of a methyl ethyl carbonate reaction tower, a methyl ethyl carbonate reaction tower top discharging pipeline is connected with a feed inlet of a dimethyl carbonate reaction tower B, a methyl ethyl carbonate reaction tower bottom discharging pipeline is connected with a feed inlet of a methyl ethyl carbonate refining tower, a methyl ethyl carbonate refining tower top discharging pipeline is connected with a feed inlet of a methyl ethyl carbonate reaction, and conveying the product of the ethyl methyl carbonate refining tower to the outside of the battery limits through a pipeline.
2. The joint production apparatus of dimethyl carbonate and ethyl methyl carbonate according to claim 1, wherein: the dimethyl carbonate reaction tower adopts a dividing wall type rectifying tower, a feed inlet A and a feed inlet B, C are respectively positioned at two sides of a dividing wall, the horizontal positions of the feed inlet A and the feed inlet B are the same, and a feed inlet C is positioned at a layer of filler below the feed inlets A and the feed inlet B.
3. The joint production apparatus of dimethyl carbonate and ethyl methyl carbonate according to claim 1, wherein: a column plate is arranged above the dividing wall of the dimethyl carbonate reaction tower, the vertical distance from the A, B feed inlet is L, and the length of L is between 1 meter and 2 meters.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920188854.5U CN209872829U (en) | 2019-02-11 | 2019-02-11 | Dimethyl carbonate and methyl ethyl carbonate joint production device |
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| CN201920188854.5U CN209872829U (en) | 2019-02-11 | 2019-02-11 | Dimethyl carbonate and methyl ethyl carbonate joint production device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116078312A (en) * | 2023-04-10 | 2023-05-09 | 东营市和瑞化学科技有限公司 | Combined production device for dimethyl carbonate and ethylmethyl carbonate and application method thereof |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116078312A (en) * | 2023-04-10 | 2023-05-09 | 东营市和瑞化学科技有限公司 | Combined production device for dimethyl carbonate and ethylmethyl carbonate and application method thereof |
| CN116078312B (en) * | 2023-04-10 | 2023-06-02 | 东营市和瑞化学科技有限公司 | Combined production device for dimethyl carbonate and ethylmethyl carbonate and application method thereof |
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Effective date of registration: 20220523 Address after: 063000 No. 905-1, 3rd floor, junxinli Central Plaza, Lubei District, Tangshan City, Hebei Province Patentee after: Tangshan good reputation Technology Development Co.,Ltd. Address before: 063000 904, business building, Central Plaza, Lubei District, Tangshan City, Hebei Province Patentee before: Qu Qianghao |