CN220834179U - Water phase recovery tower for n-butyl acetate - Google Patents
Water phase recovery tower for n-butyl acetate Download PDFInfo
- Publication number
- CN220834179U CN220834179U CN202322733215.1U CN202322733215U CN220834179U CN 220834179 U CN220834179 U CN 220834179U CN 202322733215 U CN202322733215 U CN 202322733215U CN 220834179 U CN220834179 U CN 220834179U
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- CN
- China
- Prior art keywords
- tower
- butyl acetate
- recovery
- water phase
- preheating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 238000011084 recovery Methods 0.000 title claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 230000032050 esterification Effects 0.000 claims abstract description 20
- 238000005886 esterification reaction Methods 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 18
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 12
- 239000003507 refrigerant Substances 0.000 claims description 9
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 abstract description 10
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 239000012071 phase Substances 0.000 description 24
- 238000004519 manufacturing process Methods 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 3
- 239000008346 aqueous phase Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- OAIYNRAQCIOEBD-UHFFFAOYSA-N butyl acetate;hydrate Chemical compound O.CCCCOC(C)=O OAIYNRAQCIOEBD-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model discloses a water phase recovery tower for n-butyl acetate, which comprises an esterification tower, wherein the upper end of the esterification tower is connected with a phase separator through a condenser, the lower end of the phase separator is connected with a three-way valve through a pipeline, the three-way valve is respectively connected with the esterification tower, a rectifying tower and a recovery tower through connecting pipes, a heater is arranged in the recovery tower, the upper end of the rectifying tower is connected with the lower end of the recovery tower, the lower end of the recovery tower is also provided with a discharge port, the bottom of the rectifying tower is also provided with a bottom liquid outlet, and the discharge port and the bottom liquid outlet of the rectifying tower are connected with a second rectifying tower. According to the utility model, the separated water phase is further heated, so that butyl acetate is further recovered, meanwhile, the high-temperature gas at the top of the rectifying tower is used for heating during recovery, and butyl acetate contained in the distilled gas of the rectifying tower is further heated and separated, so that the energy is saved and the recovery of butyl acetate is ensured.
Description
Technical Field
The utility model relates to the technical field of n-butyl acetate production equipment, in particular to a water phase recovery tower for n-butyl acetate.
Background
The production and preparation method of the n-butyl acetate generally comprises the steps of heating acetic acid and butanol serving as raw materials in the presence of a catalyst to prepare crude n-butyl acetate, and rectifying to obtain the finished product n-butyl acetate. Wherein, the crude n-butyl acetate is subjected to phase separation treatment after condensation, the separated water phase is directly discharged, and the ester phase enters a rectifying tower; while a part of butyl acetate or butyl acetate-water mixture is inevitably present in the directly discharged aqueous phase; if long-term discharge is not processed, there is a case where resources are wasted.
Disclosure of utility model
The utility model aims to overcome the defects in the prior art and provide a recovery tower for recovering butyl acetate by treating a discharged water phase in the production process of n-butyl acetate.
In order to achieve the purpose, the utility model relates to a water phase recovery tower for n-butyl acetate, which adopts the following technical scheme:
The utility model provides a water phase recovery tower for n-butyl acetate, includes the esterification tower, and the esterification tower upper end is connected in the phase splitter through the condenser, the phase splitter lower extreme is connected with the three-way valve through the pipe connection, and the three-way valve is connected in esterification tower, rectifying column, recovery tower respectively through the connecting pipe, be provided with the heater in the recovery tower, rectifying column upper end is connected in recovery tower lower extreme, recovery tower lower extreme still is provided with the discharge gate, rectifying column tower bottom still is provided with tower bottom liquid outlet, the discharge gate with tower bottom liquid outlet links together in the second rectifying column.
The utility model relates to a further improvement of a water phase recovery tower for n-butyl acetate, which is characterized in that a preheating tank is connected and arranged in front of an esterification tower, and the preheating tank is connected with an acetic acid tank and a butanol tank.
The utility model relates to a further improvement of a water phase recovery tower for n-butyl acetate, which is characterized in that a preheating jacket is arranged on the outer side of a preheating tank, and cold water and an electric heater are arranged in the preheating jacket.
The utility model relates to a further improvement of a water phase recovery tower for n-butyl acetate, which is characterized in that a heat exchange coil is arranged in a preheating jacket, two ends of the heat exchange coil extend out of the preheating jacket, and the upper end of the recovery tower is connected with the heat exchange coil.
The utility model relates to a further improvement of a water phase recovery tower for n-butyl acetate, which is characterized in that the upper end of a heat exchange coil is connected with the upper end of the recovery tower, and the lower end of the heat exchange coil is connected with a water collecting tank.
The utility model relates to a further improvement of a water phase recovery tower for n-butyl acetate, which is characterized in that a refrigerant outlet and a refrigerant inlet of a condenser are also connected with a water collecting tank, and the refrigerant inlet is also connected with a cold source.
Compared with the prior art, the utility model has the beneficial effects that:
According to the utility model, the separated water phase is further heated, so that butyl acetate is further recovered, meanwhile, the high-temperature gas at the top of the rectifying tower is used for heating during recovery, and butyl acetate contained in the distilled gas of the rectifying tower is further heated and separated, so that the energy is saved and the recovery of butyl acetate is ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
In the figure: 1 esterification tower, 2 condenser, 3 phase separator, 4 rectifying tower, 5 recovery tower, 6 preheating tank, 7 preheating jacket.
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 figure 1, a water phase recovery tower for n-butyl acetate comprises an esterification tower 1, wherein the upper end of the esterification tower is connected with a phase separator 3 through a condenser 2, the lower end of the phase separator is connected with a three-way valve through a pipeline, the three-way valve is respectively connected with the esterification tower, a rectifying tower 5 and a recovery tower 6 through connecting pipes, a heater is arranged in the recovery tower, the heater can be an electric heater structure, the upper end of the rectifying tower is connected with the lower end of the recovery tower, the lower end of the recovery tower is also provided with a discharge hole, the bottom of the rectifying tower is also provided with a bottom liquid outlet, and the discharge hole and the bottom liquid outlet of the rectifying tower are connected with a second rectifying tower.
Further, a preheating tank 6 is connected and arranged in front of the esterification tower, and the preheating tank is connected with an acetic acid tank and a butanol tank. The acetic acid and butanol in the preheating tank are preheated and then enter the esterification tower for catalytic heating reaction, so that the reaction time is shortened, and the production efficiency is improved. Specifically, a preheating jacket 7 is arranged on the outer side of the preheating tank, and cold water and an electric heater are arranged in the preheating jacket. And the preheating tank is heated by the electric heater, so that heat is transferred to the preheating tank, and the preheating is realized.
Further, a heat exchange coil is arranged in the preheating jacket, two ends of the heat exchange coil extend out of the preheating jacket, and the upper end of the recovery tower is connected with the heat exchange coil. The hot gas at the upper end of the recovery tower exchanges heat with the water in the preheating jacket so as to realize energy conservation. The upper end of the heat exchange coil is connected to the upper end of the recovery tower, and the lower end of the heat exchange coil is connected to the water collecting tank. The refrigerant outlet and the refrigerant inlet of the condenser are also connected with the water collecting tank, and the refrigerant inlet is also connected with the cold source.
The working principle of the utility model is as follows: the method is characterized in that the steam at the top of the esterification tower is placed in a phase separator after passing through a condenser, a water phase enters a recovery tower, part of ester phase flows back to the esterification tower, the rest ester phase enters a rectifying tower, steam is distilled out from the top of the rectifying tower, butyl acetate is used as the bottom of the rectifying tower, the steam enters the recovery tower, the steam is mixed with the water phase, the butyl acetate and the water are further separated by reheating, and the separated steam exchanges heat with the water in a preheating jacket to preheat acetic acid and butanol, so that energy is saved.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. A water phase recovery column for n-butyl acetate, characterized in that: including the esterification tower, the esterification tower upper end is connected in the phase separator through the condenser, the phase separator lower extreme has the three-way valve through the pipe connection, and the three-way valve is connected in esterification tower, rectifying column, recovery tower respectively through the connecting pipe, be provided with the heater in the recovery tower, rectifying column upper end is connected in the recovery tower lower extreme, the recovery tower lower extreme still is provided with the discharge gate, rectifying column tower bottom still is provided with tower bottom liquid export, the discharge gate with tower bottom liquid export links together in the second rectifying column.
2. A water phase recovery column for n-butyl acetate according to claim 1, characterized in that: the esterification tower is characterized in that a preheating tank is connected and arranged in front of the esterification tower, and the preheating tank is connected with an acetic acid tank and a butanol tank.
3. A water phase recovery column for n-butyl acetate according to claim 2, characterized in that: the outside of the preheating tank is provided with a preheating jacket, and cold water and an electric heater are arranged in the preheating jacket.
4. A water phase recovery column for n-butyl acetate according to claim 3, characterized in that: the preheating jacket is internally provided with a heat exchange coil, two ends of the heat exchange coil extend out of the preheating jacket, and the upper end of the recovery tower is connected with the heat exchange coil.
5. A water phase recovery column for n-butyl acetate according to claim 4, wherein: the upper end of the heat exchange coil is connected to the upper end of the recovery tower, and the lower end of the heat exchange coil is connected to the water collecting tank.
6. A water phase recovery column for n-butyl acetate according to claim 5, wherein: the refrigerant outlet and the refrigerant inlet of the condenser are also connected with the water collecting tank, and the refrigerant inlet is also connected with the cold source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322733215.1U CN220834179U (en) | 2023-10-11 | 2023-10-11 | Water phase recovery tower for n-butyl acetate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322733215.1U CN220834179U (en) | 2023-10-11 | 2023-10-11 | Water phase recovery tower for n-butyl acetate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220834179U true CN220834179U (en) | 2024-04-26 |
Family
ID=90741617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322733215.1U Active CN220834179U (en) | 2023-10-11 | 2023-10-11 | Water phase recovery tower for n-butyl acetate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220834179U (en) |
-
2023
- 2023-10-11 CN CN202322733215.1U patent/CN220834179U/en active Active
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