CN214913491U - Cyclohexanone's rectifier unit - Google Patents
Cyclohexanone's rectifier unit Download PDFInfo
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- CN214913491U CN214913491U CN202121129641.9U CN202121129641U CN214913491U CN 214913491 U CN214913491 U CN 214913491U CN 202121129641 U CN202121129641 U CN 202121129641U CN 214913491 U CN214913491 U CN 214913491U
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- cyclohexanone
- tower
- light component
- component removal
- column
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- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 title claims abstract description 160
- HPXRVTGHNJAIIH-UHFFFAOYSA-N cyclohexanol Chemical compound OC1CCCCC1 HPXRVTGHNJAIIH-UHFFFAOYSA-N 0.000 claims description 17
- -1 alcohol ketone Chemical class 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 150000002576 ketones Chemical class 0.000 abstract description 23
- 239000003921 oil Substances 0.000 description 11
- CATSNJVOTSVZJV-UHFFFAOYSA-N heptan-2-one Chemical compound CCCCCC(C)=O CATSNJVOTSVZJV-UHFFFAOYSA-N 0.000 description 8
- JARKCYVAAOWBJS-UHFFFAOYSA-N hexanal Chemical compound CCCCCC=O JARKCYVAAOWBJS-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 239000002904 solvent Substances 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- QQZOPKMRPOGIEB-UHFFFAOYSA-N 2-Oxohexane Chemical compound CCCCC(C)=O QQZOPKMRPOGIEB-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 238000010606 normalization Methods 0.000 description 2
- HGBOYTHUEUWSSQ-UHFFFAOYSA-N pentanal Chemical compound CCCCC=O HGBOYTHUEUWSSQ-UHFFFAOYSA-N 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- UOBQDYFTAJKQAL-UHFFFAOYSA-N 2-cyclohexylcyclohexan-1-one Chemical compound O=C1CCCCC1C1CCCCC1 UOBQDYFTAJKQAL-UHFFFAOYSA-N 0.000 description 1
- TYDSIOSLHQWFOU-UHFFFAOYSA-N 2-cyclohexylidenecyclohexan-1-one Chemical compound O=C1CCCCC1=C1CCCCC1 TYDSIOSLHQWFOU-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- FWFSEYBSWVRWGL-UHFFFAOYSA-N cyclohex-2-enone Chemical compound O=C1CCCC=C1 FWFSEYBSWVRWGL-UHFFFAOYSA-N 0.000 description 1
- PDXRQENMIVHKPI-UHFFFAOYSA-N cyclohexane-1,1-diol Chemical compound OC1(O)CCCCC1 PDXRQENMIVHKPI-UHFFFAOYSA-N 0.000 description 1
- WJYHCYBNUJVCEH-UHFFFAOYSA-N cyclohexane;ethoxyethane Chemical compound CCOCC.C1CCCCC1 WJYHCYBNUJVCEH-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- FGGJBCRKSVGDPO-UHFFFAOYSA-N hydroperoxycyclohexane Chemical compound OOC1CCCCC1 FGGJBCRKSVGDPO-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model relates to a cyclohexanone's rectifier unit. The rectifying device comprises: a first lightness-removing column, a second lightness-removing column and a cyclohexanone column, and the rectification apparatus does not comprise a conventional ketone second column. Compare with the rectifier unit of prior art's cyclohexanone, the utility model discloses a rectifier unit of cyclohexanone has saved the ketone two tower, saves power consumption 57888 KW/year, saves steam 4320 t/year, has effectively controlled the cyclohexanone quality simultaneously.
Description
Technical Field
The utility model belongs to the chemical engineering field, specifically, the utility model relates to a cyclohexanone's rectification device.
Background
In the prior art, as shown in figure 1, crude alcohol ketone produced by oxidation in a cyclohexanone rectification section enters a light first tower C-301a (with the inner diameter of 3000mm) through a pump, and tower bottom materials are sent to a ketone tower C-303 (with the inner diameter of 4000 mm); the top of the tower is pumped into a light second tower C-302 (the inner diameter is 1000mm) by a condensing pump, the light second tower C-302 is heated by 1.1MPa steam, the negative pressure distillation is carried out, light components are distilled out, and the light components are pumped into a light oil tank by the condensing pump, namely the light oil. The materials in the bottom of the light second tower are pressurized by a pump and sent into a second ketone tower C-301 (the inner diameter is 2200mm) to be heated and separated by 1.1MPa steam, the extracted materials from the top of the second ketone tower C-301 are sent into a solvent ketone tank by a condensing pump, the solvent ketone is the solvent ketone, the content of the ketone in the solvent ketone is up to more than 95 percent, and the extracted materials from the bottom of the tower are sent into a ketone tower C-303. The process has high energy consumption, poor product quality and low additional value, namely, the low-price solvent ketone is generated, the yield of the high-price cyclohexanone is reduced, and the consumption is increased. The volume of the light second tower (DN is 1000mm) is too small, so that the index control of light components is influenced, and finally, the cyclohexanone product contains light components which are higher and the content of ketone is influenced.
Therefore, there is a need for an apparatus that can control the content of light components in cyclohexanone and ensure the quality of cyclohexanone while reducing energy consumption.
Disclosure of Invention
The technical purpose of the utility model is to provide a cyclohexanone's rectifier unit, rectifier unit can be when improving cyclohexanone output, light component content in the control cyclohexanone, and save equipment reduces the energy consumption.
In one aspect, the utility model relates to a cyclohexanone's rectifier unit, rectifier unit includes:
the first light component removal tower is provided with a feed inlet and is used for receiving crude alcohol ketone;
the second light component removal tower is connected with the tower top of the first light component removal tower and is used for enabling light components separated from the first light component removal tower to enter the second light component removal tower, and the tower top of the second light component removal tower is connected with a light oil tank;
and the cyclohexanone tower is respectively connected with the tower bottom of the first light component removal tower and the tower bottom of the second light component removal tower and is used for enabling heavy components in tower kettles of the first light component removal tower and the second light component removal tower to respectively enter the cyclohexanone tower, and a cyclohexanone outlet is formed in the tower top of the cyclohexanone tower.
In a specific embodiment, the second light component removal tower is cylindrical, the inner diameter of the second light component removal tower is 1200 and 2800mm, and the volume of the second light component removal tower is 52-284m3Taking into consideration the index requirement and investment consumption of cyclohexanone in the market, the preferred inner diameter is 2200mm, the height is 48655mm, and the volume is 175.3m3。
In a specific embodiment, the top of the first light component removal tower is connected to the second light component removal tower through a first pipeline, and a condenser and a pump are arranged on the first pipeline, and the condenser is located upstream of the pump.
In a specific embodiment, the bottom of the first light component removal tower is connected to the cyclohexanone tower through a second pipeline, the bottom of the second light component removal tower is connected to the cyclohexanone tower through a third pipeline, and the second pipeline and the third pipeline are respectively provided with a pump.
In a specific embodiment, the rectifying device further comprises a cyclohexanol tower connected to the bottom of the cyclohexanone tower, and a cyclohexanol extraction port is arranged at the top of the cyclohexanol tower.
In a specific embodiment, the bottoms of the first light component removal tower, the second light component removal tower and the cyclohexanone tower can be respectively connected with a reboiler.
Advantageous effects
The utility model relates to a cyclohexanone's rectifier unit, owing to take off the light tower for prior art's second, used the volume increase, high new second that increases takes off the light tower, consequently, adopt the utility model discloses a device, light component are evaporated out very easily, and hexanal + 2-heptanone is also extracted, simultaneously because the second takes off the light tower the material loading also increase, the index of the light component of easy control, the top of the tower is extracted and is contained ketone volume and also correspondingly reduce. The content of ketone at the bottom of the tower is correspondingly improved, the discharge amount is also increased, after the cyclohexanone is sent to the cyclohexanone tower, the steam consumption of the cyclohexanone tower is reduced, meanwhile, the light components in the cyclohexanone extracted by the cyclohexanone tower are relatively low, and the hexanal and the 2-heptanone can be effectively controlled.
The device of the utility model does not generate solvent ketone any longer, and all the solvent ketone is converted into cyclohexanone, so that the yield of the cyclohexanone is improved. Compared with the cyclohexanone distillation plant of prior art, the utility model discloses a device has reduced two pumps, has still saved conventional ketone two towers, saves the power consumption 57888 KW/year, saves steam 4320 t/year, has effectively controlled the cyclohexanone quality simultaneously, and light component control is about 200ppm, and hexanal is 0, and 2-heptanone is about 15ppm, and the cyclohexanone qualification rate is 100%.
Drawings
Fig. 1 shows a schematic diagram of a rectification apparatus for cyclohexanone according to the prior art.
Figure 2 shows a schematic of a rectification apparatus for cyclohexanone according to example 1 of the present invention.
Description of the reference numerals
C-301: ketone two tower
C-301 a: light tower
C-302: light second tower
C-303: ketone tower
1: first lightness-removing tower
2: second lightness-removing tower
3. Cyclohexanone tower
4. Cyclohexanol tower
5. Light oil tank
6. Cyclohexanone tank
7. Cyclohexanol tank
C1, C2, C3, C4: condenser
R1, R2, R3, R4: return channel
P1, P2, P3: pump and method of operating the same
B1, B2, B3, B4: reboiler device
Detailed Description
The technical content of the present invention is explained by the following specific examples, which, however, are not intended to limit the scope of the present invention.
Term(s) for
In the present invention, "crude alcohol ketone" means a compound produced by the following oxidation process: benzene reacts with hydrogen to produce cyclohexane; cyclohexane reacts with oxygen in the air at a certain temperature and pressure to produce cyclohexyl hydroperoxide, which decomposes in an alkaline environment to produce the crude alcohol ketone, which comprises a mixture of cyclohexanone and cyclohexanol, as well as a small amount of cyclohexane, as well as light oils and some heavy components.
In the present invention, "light oil" includes n-valeraldehyde, butanol, 2 hexanone, n-pentanol. "heavies" include cyclohexenone, cyclohexane ether, cyclohexanediol, 2-cyclohexylidene cyclohexan-1-one, 2, 3-bicyclohexane-one.
The utility model relates to a cyclohexanone's rectifier unit, rectifier unit includes:
the first light component removal tower 1 is provided with a feed inlet, and is used for receiving crude alcohol ketone;
a second light component removal tower 2 connected with the top of the first light component removal tower 1 and used for leading the light components separated from the first light component removal tower 1 to enter the second light component removal tower 2, wherein the top of the second light component removal tower 2 is connected with a light oil tank 5;
and the cyclohexanone tower 3 is respectively connected with the tower bottom of the first light component removal tower 1 and the tower bottom of the second light component removal tower 2, and is used for enabling heavy components in tower kettles of the first light component removal tower 1 and the second light component removal tower 2 to respectively enter the cyclohexanone tower 3, and a cyclohexanone outlet is formed in the tower top of the cyclohexanone tower 3.
In a specific embodiment, the second light component removal tower 2 is cylindrical, has an inner diameter of 1200 and 2800mm and a volume of 52-284m3Preferably 2200mm in internal diameter, 48655mm in height and 175.3m in volume3。
In a specific embodiment, the top of the first lightness-removing column 1 is connected with the second lightness-removing column 2 through a first pipeline, the first pipeline is provided with a condenser C1, a reflux tank R1 and a pump, and the condenser C1 is positioned at the upstream of the pump.
In a specific embodiment, the bottom of the first light and light component removing tower 1 is connected to the cyclohexanone tower 3 through a second pipeline, the bottom of the second light and light component removing tower 2 is connected to the cyclohexanone tower 3 through a third pipeline, and pumps are respectively arranged on the second pipeline and the third pipeline.
In a specific embodiment, the rectifying device further comprises a cyclohexanol tower 4 connected to the bottom of the cyclohexanone tower 3, and a cyclohexanol extraction port is arranged at the top of the cyclohexanol tower 4.
In a specific embodiment, the bottoms of the first light component removal column 1, the second light component removal column 2 and the cyclohexanone column 3 are respectively connected with a reboiler.
In the following specific embodiment, the detection method of cyclohexanone refers to national standard GB10669-2001, and the detection method comprises the following steps: gas chromatography normalization. Detection conditions are as follows: capillary column 60 m x 0.32 m x 0.50 m (thickness of tube); the injection port temperature was 280 ℃.
Example 1
As shown in fig. 2, crude alcohol ketone produced by oxidation is pumped through a feed port (not shown) into a first lightness-removing column 1 (inner diameter DN 3000mm) for separating light oil from alcohol, ketone and heavy components, a bottom stream of the first lightness-removing column 1 is sent into a cyclohexanone column 3 through a second pipeline, and an overhead stream of the first lightness-removing column 1 is sent into a second lightness-removing column 2 (inner diameter 2200mm, height 48mm, capacity 175.3m 655 mm) through a first pipeline3The feeding amount is 4.5m3The pressure at the top of the column is-44 kpa, vs. the corresponding light second column C-302 in the prior art has an inner diameter of 1000mm, a height of 46010mm and a volume of 32.5m3The feeding amount is 2m3H, the pressure at the top of the tower is-55 kpa); heating a second light component removal tower 2 by using 1.1MPa steam for separating light oil and cyclohexanone, extracting light components at the top of the second light component removal tower 2 into a light oil tank 5 (wherein the content of ketone is 5 wt%, and the content of ketone extracted at the top of a light second tower C-302 in the prior art is 15 wt%), and sending a bottom material flow of the second light component removal tower 2 into a cyclohexanone tower 3 (the inner diameter is 4000mm) through a third pipeline; feeding the cyclohexanone extracted from the top of the cyclohexanone tower 3 into a cyclohexanone tank 6, feeding the bottom material flow of the cyclohexanone tower 3 into a cyclohexanol tower 4 through a pipeline,further, cyclohexanol extracted from the top of the cyclohexanol tower 4 enters a cyclohexanol tank 7. In the above apparatus, the condenser C1 and the pump are connected to the first line, the reboiler is connected to the bottoms of the first lightness-removing column, the second lightness-removing column, and the cyclohexanone column, respectively, and the condenser and the pump are provided in the lines upstream of the light oil tank 5, the cyclohexanone tank 6, and the cyclohexanol tank 7, respectively.
The quality of the cyclohexanone obtained by the device is effectively controlled, and the quality is detected by a gas chromatography normalization method, so that the light component is controlled to be about 200ppm, the hexanal is 0, the 2-heptanone is about 15ppm, and the qualification rate of the cyclohexanone is 100%.
From the results of the above specific embodiments, the device of the present invention, when used for cyclohexanone rectification, achieves the following technical effects: the quality of cyclohexanone is effectively controlled while related devices are reduced and energy consumption is reduced.
Claims (7)
1. A rectification apparatus for cyclohexanone, said rectification apparatus comprising:
the first light component removal tower is provided with a feed inlet and is used for receiving crude alcohol ketone;
the second light component removal tower is connected with the tower top of the first light component removal tower and is used for enabling light components separated from the first light component removal tower to enter the second light component removal tower, and the tower top of the second light component removal tower is connected with a light oil tank;
and the cyclohexanone tower is respectively connected with the tower bottom of the first light component removal tower and the tower bottom of the second light component removal tower and is used for enabling heavy components in tower kettles of the first light component removal tower and the second light component removal tower to respectively enter the cyclohexanone tower, and a cyclohexanone outlet is formed in the tower top of the cyclohexanone tower.
2. The apparatus for rectifying cyclohexanone as claimed in claim 1, wherein the second light component removal column has a cylindrical shape with an inner diameter of 1200 and 2800mm and a volume of 52-284m3。
3. Device for rectifying cyclohexanone according to claim 2, characterized in that said device is a device for rectifying cyclohexanoneThe second lightness-removing column has an internal diameter of 2200mm, a height of 48655mm and a volume of 175.3m3。
4. The device for rectifying cyclohexanone in claim 1, wherein the top of the first lightness-removing column is connected with the second lightness-removing column through a first pipeline, and a condenser and a pump are arranged on the first pipeline, wherein the condenser is positioned at the upstream of the pump.
5. The apparatus for rectifying cyclohexanone in accordance with claim 1, wherein the bottom of the first lightness-removing column is connected to the cyclohexanone column via a second line, the bottom of the second lightness-removing column is connected to the cyclohexanone column via a third line, and pumps are respectively disposed on the second line and the third line.
6. The device for rectifying cyclohexanone in accordance with claim 1, further comprising a cyclohexanol column connected to a bottom of the cyclohexanone column, wherein a cyclohexanol outlet is provided at a top of the cyclohexanol column.
7. The apparatus for rectifying cyclohexanone in accordance with claim 1, wherein a reboiler is connected to the bottoms of the first and second light ends stripping columns and the cyclohexanone column, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121129641.9U CN214913491U (en) | 2021-05-25 | 2021-05-25 | Cyclohexanone's rectifier unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121129641.9U CN214913491U (en) | 2021-05-25 | 2021-05-25 | Cyclohexanone's rectifier unit |
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| Publication Number | Publication Date |
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| CN214913491U true CN214913491U (en) | 2021-11-30 |
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| CN202121129641.9U Active CN214913491U (en) | 2021-05-25 | 2021-05-25 | Cyclohexanone's rectifier unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115382233A (en) * | 2021-05-25 | 2022-11-25 | 山东洪达化工有限公司 | Cyclohexanone rectification device and method |
| CN115557833A (en) * | 2022-11-10 | 2023-01-03 | 天津市圣融祺科技发展有限公司 | Process method and device for separating cyclohexanone and cyclohexanol by thermal coupling rectification |
-
2021
- 2021-05-25 CN CN202121129641.9U patent/CN214913491U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115382233A (en) * | 2021-05-25 | 2022-11-25 | 山东洪达化工有限公司 | Cyclohexanone rectification device and method |
| CN115557833A (en) * | 2022-11-10 | 2023-01-03 | 天津市圣融祺科技发展有限公司 | Process method and device for separating cyclohexanone and cyclohexanol by thermal coupling rectification |
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240422 Address after: 274700 Yuncheng Chemical Industry Park, Yuncheng County, Heze City, Shandong Province Patentee after: Yuncheng Xuyang Energy Co.,Ltd. Country or region after: China Address before: 274700 in suiguantun Coal Chemical Industrial Park, yuncheng county, Heze City, Shandong Province Patentee before: SHANDONG HONGDA CHEMICAL Co.,Ltd. Country or region before: China |
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