CN210495269U - Toluene liquid-phase air oxidation process decomposition desalting liquid light-weight removal device - Google Patents
Toluene liquid-phase air oxidation process decomposition desalting liquid light-weight removal device Download PDFInfo
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- CN210495269U CN210495269U CN201921255659.6U CN201921255659U CN210495269U CN 210495269 U CN210495269 U CN 210495269U CN 201921255659 U CN201921255659 U CN 201921255659U CN 210495269 U CN210495269 U CN 210495269U
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- light component
- tower
- liquid
- light
- lightness
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- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 239000007788 liquid Substances 0.000 title claims abstract description 25
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 19
- 239000007791 liquid phase Substances 0.000 title claims abstract description 17
- 230000003647 oxidation Effects 0.000 title claims abstract description 16
- 238000000354 decomposition reaction Methods 0.000 title claims description 11
- 238000000034 method Methods 0.000 title claims description 7
- 238000011033 desalting Methods 0.000 title description 5
- 238000012856 packing Methods 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000010612 desalination reaction Methods 0.000 claims abstract description 8
- 238000005516 engineering process Methods 0.000 claims abstract description 8
- 238000005191 phase separation Methods 0.000 claims description 26
- 238000011084 recovery Methods 0.000 claims description 16
- 238000002309 gasification Methods 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000003795 desorption Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000012071 phase Substances 0.000 description 9
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000012074 organic phase Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- YVJRCWCFDJYONJ-UHFFFAOYSA-N hydroperoxymethylbenzene Chemical compound OOCC1=CC=CC=C1 YVJRCWCFDJYONJ-UHFFFAOYSA-N 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000005711 Benzoic acid Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- 235000019445 benzyl alcohol Nutrition 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
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model relates to a toluene liquid phase air oxidation technology decomposes desalination liquid and takes off light device, including taking off the light tower, take off the light tower and divide into the upper portion of the light tower and take off the light tower lower part of taking off that communicates from top to bottom, the tower diameter on taking off light tower upper portion is less than the tower diameter of taking off the light tower lower part, it is equipped with first packing layer to take off light tower upper portion below, it is equipped with second packing layer, third packing layer to take off the light tower lower part, takes off light tower lower part bottom and passes through circulation pipeline and connect the reboiler, and the preheating tank passes through the pipeline and takes off the second packing layer top entry intercommunication in the light tower lower part, it is equipped with the discharge pipe way and communicates with first condenser shell side, second condenser shell side and third condenser shell side in proper order to take off light tower upper portion top, the. The utility model discloses take off the light component material desorption in the light tower with toluene liquid phase air oxidation technology toluene, improved the gasification efficiency of light component in the synthetic liquid, the light component is extracted by the separation more easily.
Description
Technical Field
The utility model belongs to the technical field of organic chemical industry, a toluene liquid phase air oxidation technology decomposes desalination liquid and takes off light device is related to.
Background
The toluene liquid phase air oxidation reaction is used for preparing benzyl hydrogen peroxide, and the benzyl hydrogen peroxide is obtained by carrying out catalytic oxidation reaction on toluene liquid and air in the presence of a catalyst.
A toluene solution of an oxidation liquid, benzyl hydroperoxide (intermediate product), is obtained by a toluene liquid phase air oxidation reaction, and is converted into a decomposition desalting liquid, a mixed solution containing toluene/benzyl alcohol/benzaldehyde/benzoic acid and the like, called decomposition desalting liquid, through a homogeneous decomposition catalytic reaction, and the decomposition desalting liquid needs to be subjected to light weight removal treatment in order to improve the purity of a product.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a toluene liquid phase air oxidation technology decomposes desalination liquid and takes off light device decomposes the desorption of light component material in the desalination liquid with toluene liquid phase air oxidation technology.
The utility model discloses a scheme:
the utility model provides a toluene liquid phase air oxidation technology decomposes desalination liquid and takes off light device, includes the lightness-removing tower, the lightness-removing tower divide into the lightness-removing tower upper portion and the lightness-removing tower lower part of intercommunication from top to bottom, and the tower diameter on lightness-removing tower upper portion is less than the tower diameter of lightness-removing tower lower part, lightness-removing tower upper portion below is equipped with first packing layer, the lightness-removing tower lower part is equipped with second packing layer, third packing layer, and the reboiler is connected through the circulation line in lightness-removing tower lower part bottom, and the preheating tank passes through the pipeline and communicates with the second packing layer top entry in the lightness-removing tower lower part, lightness-removing tower upper portion top is equipped with the discharge pipe way and communicates with first condenser shell side, second condenser shell side and third condenser shell side in proper order, the third condenser passes through pipeline.
Preferably, a phase separation plate is arranged inside the phase separation tank, the phase separation tank is provided with a discharge port and a recovery port respectively at the left side and the right side of the phase separation plate, the recovery port is communicated with an inlet above the first packing layer in the upper part of the light component removal tower through a pipeline, and the discharge port is connected with the light component recovery tank through a pipeline.
Preferably, the feeding port above the phase separation tank is positioned on one side of the phase separation plate close to the recovery port.
Preferably, the first condenser shell side and the second condenser shell side are also respectively communicated with the phase separation tank through pipelines.
Further preferably, the bottom of the light component removal tower is also provided with a material outlet.
The utility model discloses beneficial effect:
1. the utility model discloses lightness-removing tower decomposes the desalination liquid with toluene liquid phase air oxidation technology and takes off light, and the tower diameter on lightness-removing tower upper portion is less than the tower diameter of lightness-removing tower lower part, can prolong distillation route and time, improves the separation effect of light component, lightness-removing tower upper portion below is equipped with first packing layer, lightness-removing tower lower part is equipped with second packing layer, third packing layer, and the reboiler is connected through the circulation pipeline in lightness-removing tower lower part bottom, and the preheating tank passes through the pipeline and takes off second packing layer top entry intercommunication in the lightness-removing tower lower part, the recovery mouth passes through the pipeline and takes off first packing layer top entry intercommunication in lightness-removing tower upper portion, has reduced the condensation reflux volume of lightness-removing tower lower part gasification material, has improved the gasification efficiency of light component in the synthetic liquid simultaneously, and the light component is extracted by the separation more.
2. After the components are separated by the light component removing tower, a discharge pipeline is arranged at the top of the upper part of the light component removing tower, the discharge pipeline is condensed by a first condenser, a second condenser and a third condenser in sequence and then enters a phase splitting tank to be communicated, a phase splitting plate is arranged inside the phase splitting tank, condensate is further separated by the phase splitting plate, the light components enter a light component recovery tank, and the materials at the bottom are further separated and removed from the light components through the upper part of a first packing layer in a recovery port.
3. The first condenser shell pass and the second condenser shell pass are communicated with the phase splitting tank through pipelines respectively, the heat exchanger is fully and reasonably utilized, the first condenser, the second condenser and the third condenser can be used in series or in parallel, and the light component substances are fully condensed while the condensation water consumption is guaranteed to be reduced.
4. The bottom of the lower part of the light component removal tower is connected with a reboiler through a circulating pipeline, so that the material heating temperature is ensured to be uniform, the heating at higher temperature is realized, and the gasification amount is increased.
Drawings
FIG. 1 is a schematic view of the system of the present invention;
wherein: the device comprises a light component removal tower 1, a light component removal tower upper part 11, a first packing layer 111, a light component removal tower lower part 12, a second packing layer 121, a third packing layer 122, a reboiler 2, a preheating tank 3, a first condenser 4, a second condenser 5, a third condenser 6, a phase separation tank 7, a phase separation plate 71, a discharge port 72, a recovery port 73 and a light component recovery tank 8.
Detailed Description
The invention is further described with reference to the following examples, but the scope of the invention as claimed is not limited to the scope of the examples.
Example 1
As shown in fig. 1, a toluene liquid-phase air oxidation process decomposition desalination liquid lightness-removing device comprises a lightness-removing column 1, wherein the lightness-removing column 1 is divided into a lightness-removing column upper part 11 and a lightness-removing column lower part 12 which are communicated up and down, the column diameter of the lightness-removing column upper part 11 is smaller than that of the lightness-removing column lower part 12, a first packing layer 111 is arranged below the lightness-removing column upper part 11, the lightness-removing column lower part 12 is provided with a second packing layer 121 and a third packing layer 122, the bottom of the lightness-removing column lower part 12 is connected with a reboiler 2 through a circulating pipeline, a preheating tank 3 is communicated with an inlet above the second packing layer 121 in the lightness-removing column lower part 12 through a pipeline, the top of the lightness-removing column upper part 11 is provided with a discharge pipeline which is communicated with a first condenser 4 shell pass, a second condenser 5 shell pass and a third condenser 6 shell pass, and the third condenser.
Preferably, a phase separation plate 71 is arranged inside the phase separation tank 7, a discharge port 72 and a recovery port 73 are respectively arranged at the left side and the right side of the phase separation plate 71 of the phase separation tank 7, the recovery port 73 is communicated with an inlet above the first packing layer 111 in the upper part 11 of the light component removal tower through a pipeline, and the discharge port 72 is connected with the light component recovery tank 8 through a pipeline.
Preferably, the feeding port above the phase separation tank 7 is positioned on the side of the phase separation plate 71 close to the recycling port 73.
Preferably, the shell side of the first condenser 4 and the shell side of the second condenser 5 are also respectively communicated with the phase separation tank 7 through pipelines.
Further preferably, the bottom of the lightness-removing column 1 is also provided with a material discharge outlet.
The utility model discloses during the use: the washed organic phase is heat-exchanged with oxidizing liquid through a preheating tank 3 and then fed from the upper part of a second packing layer 121 of a lightness-removing tower 1, the tower kettle is heated by using low-pressure steam of about 3.5T per hour through a reboiler 2, inert gas, water and light components with the boiling point lower than that of toluene in the organic phase are all removed, the gas phase at the top of the tower firstly enters a first condenser 4 for cooling and condensation by using circulating hot water, condensate enters a phase-splitting tank 7, uncondensed gas phase enters a second condenser 5 for cooling and condensation by using circulating water, the condensate enters a phase-splitting tank 7, uncondensed gas phase enters a third condenser 6 for cooling and condensation by using low-temperature water at the temperature of 7-12 ℃, the condensate enters the phase-splitting tank 7, the uncondensed gas phase is basically inert gas such as nitrogen and the like, the gas enters a tail gas buffer tank, and the pressure of the lightness-removing tower 1 is controlled, the gas of tail gas buffer tank is compressed by a tail gas compressor and then is conveyed to an absorption tank and then is discharged along with the oxidized tail gas, wherein condensed fluid enters a phase separation tank 7 and then is discharged out of water evaporated through a water drum and a baffle, the water enters a wastewater intermediate tank, part of organic phase on the other side of the baffle is extracted to a tank zone benzene storage tank through a reflux pump of a pretreatment tower, part of organic phase returns to the top of a lightness-removing tower 1, kettle liquid of the lightness-removing tower 1 from which inert gas and substances below the boiling point of methylbenzene are removed enters an effective feeding heater, low-pressure steam is used for heating and then is divided into three paths for heating, and the heated gases are merged into the oxidized tail gas for heating. Wherein the material temperature at the lower part 12 of the light component removal tower is 127-129 ℃, the liquid level is controlled at 37-42 percent, and the pressure is 60-64 kPa; the inlet temperature of the preheating tank 3 is 113-115 ℃, the temperature of condensed water of the first condenser 4 is 50 ℃, the temperature of condensed water of the second condenser 5 is 30 ℃, the temperature of condensed water of the third condenser 6 is 7 ℃, the discharge temperature of the preheating tank 3 is 45-50 ℃, and the liquid level of the phase separation tank 7 is controlled to be 53-58%.
Claims (5)
1. The utility model provides a toluene liquid phase air oxidation technology decomposes desalination liquid lightness-removing device, includes lightness-removing tower (1), its characterized in that: the light component removing tower is characterized in that the light component removing tower (1) is divided into a light component removing tower upper portion (11) and a light component removing tower lower portion (12) which are communicated up and down, the tower diameter of the light component removing tower upper portion (11) is smaller than that of the light component removing tower lower portion (12), a first packing layer (111) is arranged below the light component removing tower upper portion (11), the light component removing tower lower portion (12) is provided with a second packing layer (121) and a third packing layer (122), the bottom of the light component removing tower lower portion (12) is connected with a reboiler (2) through a circulating pipeline, a preheating tank (3) is communicated with an inlet above the second packing layer (121) in the light component removing tower lower portion (12) through a pipeline, the top of the light component removing tower upper portion (11) is provided with a discharge pipeline which is communicated with a first condenser (4) shell pass, a second condenser (5) shell pass and a third condenser (6) in sequence, and the third.
2. The toluene liquid-phase air oxidation process decomposition desalted liquid lightness-removing device according to claim 1, characterized in that: the phase separation tower is characterized in that a phase separation plate (71) is arranged in the phase separation tank (7), a discharge port (72) and a recovery port (73) are respectively arranged on the left side and the right side of the phase separation plate (71) of the phase separation tank (7), the recovery port (73) is communicated with an inlet above a first packing layer (111) in the upper part (11) of the light component removal tower through a pipeline, and the discharge port (72) is connected with a light component recovery tank (8) through a pipeline.
3. The toluene liquid-phase air oxidation process decomposition desalted liquid lightness-removing device according to claim 1, characterized in that: and a feeding port above the phase separation tank (7) is positioned on one side of the phase separation plate (71) close to the recovery port (73).
4. The toluene liquid-phase air oxidation process decomposition desalted liquid lightness-removing device according to claim 1, characterized in that: the shell side of the first condenser (4) and the shell side of the second condenser (5) are also respectively communicated with the phase separation tank (7) through pipelines.
5. The toluene liquid-phase air oxidation process decomposition desalted liquid lightness-removing device according to claim 4, characterized in that: the bottom of the light component removal tower (1) is also provided with a material outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921255659.6U CN210495269U (en) | 2019-08-05 | 2019-08-05 | Toluene liquid-phase air oxidation process decomposition desalting liquid light-weight removal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921255659.6U CN210495269U (en) | 2019-08-05 | 2019-08-05 | Toluene liquid-phase air oxidation process decomposition desalting liquid light-weight removal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210495269U true CN210495269U (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921255659.6U Active CN210495269U (en) | 2019-08-05 | 2019-08-05 | Toluene liquid-phase air oxidation process decomposition desalting liquid light-weight removal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210495269U (en) |
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- 2019-08-05 CN CN201921255659.6U patent/CN210495269U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A toluene liquid-phase air oxidation process decomposition desalination liquid delignification device Effective date of registration: 20231227 Granted publication date: 20200512 Pledgee: Agricultural Bank of China Limited Zhijiang sub branch Pledgor: HUBEI KELIN BOLUN NEW MATERIAL CO.,LTD. Registration number: Y2023980074318 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |