CN219209021U - Tertiary butanol purifying system - Google Patents
Tertiary butanol purifying system Download PDFInfo
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- CN219209021U CN219209021U CN202223233313.0U CN202223233313U CN219209021U CN 219209021 U CN219209021 U CN 219209021U CN 202223233313 U CN202223233313 U CN 202223233313U CN 219209021 U CN219209021 U CN 219209021U
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- tertiary butanol
- rectifying tower
- membrane
- purification system
- tower
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- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 title claims abstract description 80
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000012528 membrane Substances 0.000 claims abstract description 34
- 238000000746 purification Methods 0.000 claims abstract description 24
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000005373 pervaporation Methods 0.000 claims abstract description 11
- 238000000605 extraction Methods 0.000 claims abstract description 5
- 238000010992 reflux Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 9
- 239000002808 molecular sieve Substances 0.000 claims description 6
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 6
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 3
- 229920001661 Chitosan Polymers 0.000 claims description 3
- 229920002125 Sokalan® Polymers 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 229920000831 ionic polymer Polymers 0.000 claims description 3
- 239000004584 polyacrylic acid Substances 0.000 claims description 3
- 235000010413 sodium alginate Nutrition 0.000 claims description 3
- 229940005550 sodium alginate Drugs 0.000 claims description 3
- 239000000661 sodium alginate Substances 0.000 claims description 3
- HMPCUFDKPHXUPF-UHFFFAOYSA-N 2-methylpropan-1-ol;2-methylpropan-2-ol Chemical compound CC(C)CO.CC(C)(C)O HMPCUFDKPHXUPF-UHFFFAOYSA-N 0.000 abstract description 4
- GCMRADJSYIFOBU-UHFFFAOYSA-N methanol;2-methylpropan-2-ol Chemical compound OC.CC(C)(C)O GCMRADJSYIFOBU-UHFFFAOYSA-N 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 14
- 239000006227 byproduct Substances 0.000 description 9
- 238000006297 dehydration reaction Methods 0.000 description 7
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 6
- 230000018044 dehydration Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 4
- ZQXSFZAMFNRZOQ-UHFFFAOYSA-N 2-methylpropan-2-ol;hydrate Chemical compound O.CC(C)(C)O ZQXSFZAMFNRZOQ-UHFFFAOYSA-N 0.000 description 3
- BTANRVKWQNVYAZ-UHFFFAOYSA-N butan-2-ol Chemical compound CCC(C)O BTANRVKWQNVYAZ-UHFFFAOYSA-N 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- LCQPFOZNYVLABG-UHFFFAOYSA-N 1-Isobutanol Chemical compound C1=CC(CNC(=O)OC)=CC=C1OC1C(OC(C)=O)C(OC(C)=O)C(OC(C)=O)C(C)O1 LCQPFOZNYVLABG-UHFFFAOYSA-N 0.000 description 1
- 238000010533 azeotropic distillation Methods 0.000 description 1
- 238000000998 batch distillation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000895 extractive distillation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model provides a tertiary butanol purification system, which comprises: the device comprises a first rectifying tower for removing isobutanol in a crude tertiary butanol product, a steam permeation device for removing water and a second rectifying tower for removing methanol, wherein the steam permeation device comprises a pervaporation membrane, a interception side and a permeation side, the top of the first rectifying tower is communicated with the interception side of the steam permeation device, an interception side outlet of the steam permeation device is connected with the second rectifying tower, and a tower kettle of the second rectifying tower is connected with a high-purity tertiary butanol extraction pipeline. The system can separate isobutanol-tertiary butanol, methanol-tertiary butanol and other systems which are difficult to separate, adopts a rectification-steam permeation permeable membrane-rectification coupling technology, is not limited by azeotropy, does not need to add a third component, and can obtain high-purity tertiary butanol.
Description
Technical Field
The utility model relates to the technical field of tertiary butanol purification, in particular to a tertiary butanol purification system.
Background
Tertiary butanol is widely used in fields of chemical industry, medicine and the like, and 2 kinds of tertiary butanol are commercially available, namely 85% tertiary butanol and anhydrous tertiary butanol (the mass fraction of tertiary butanol is more than 99.5%). The anhydrous tertiary butanol is better in sales condition and is an important fine organic chemical raw material, and the existing tertiary butanol purification method comprises extractive distillation, azeotropic distillation, pervaporation membrane method, adsorption method and the like.
The byproduct tertiary butanol produced in the process of preparing the epoxypropane by the co-oxidation method has relatively high purity, but the co-oxidation process is complex, and the byproduct tertiary butanol also contains components such as water, methanol, isopropanol, isobutanol, 2-butanol and the like.
CN101372442a discloses a device and a method for separating tert-butanol and water by batch distillation and pervaporation, the device for separating tert-butanol and water comprising: the device comprises a rectifying tower body, a rectifying tower kettle, a condenser, a membrane separator, a water jet pump, a condensate storage tank and a circulating pump. The utility model is suitable for a tertiary butanol-water system with simple components, and is not suitable for purifying the byproduct tertiary butanol of a complex system.
CN103071307a discloses a rectification-vapor permeation coupled organic solvent dehydration method and device, wherein the device comprises a raw material tank, a raw material pump, a preheater, a rectification tower and a vapor permeation device which are connected in sequence, and the top of the rectification tower is directly connected with the vapor permeation device. The utility model is suitable for dehydration of organic solvent with single component, and is not suitable for dehydration and purification of tert-butanol which is a byproduct of a complex system containing methanol and isobutanol.
Because the tertiary butanol-water, the isobutanol-tertiary butanol and the methanol-tertiary butanol are difficult to separate, the purification of the byproduct tertiary butanol of the propylene oxide produced by the co-oxidation method is difficult.
Disclosure of Invention
The utility model aims to provide a tertiary butanol purification system, which solves the defect that the proposal of the prior art can not purify the byproduct tertiary butanol of propylene oxide produced by a co-oxidation method, can separate the systems which are difficult to separate such as isobutanol-tertiary butanol, methanol-tertiary butanol and the like, adopts a rectification-steam permeation permeable membrane-rectification coupling technology, is not limited by azeotropy, does not need to add a third component, and can obtain high-purity tertiary butanol.
To achieve the above object, the present utility model provides a tertiary butanol purification system comprising: the device comprises a first rectifying tower for removing isobutanol in a crude tertiary butanol product, a steam permeation device for removing water and a second rectifying tower for removing methanol, wherein the steam permeation device comprises a pervaporation membrane, a interception side and a permeation side, the top of the first rectifying tower is communicated with the interception side of the steam permeation device, an interception side outlet of the steam permeation device is connected with the second rectifying tower, and a tower kettle of the second rectifying tower is connected with a high-purity tertiary butanol extraction pipeline.
The tertiary butanol purification system is characterized in that the top of the second rectifying tower is connected with a second rectifying tower reflux tank for enabling the tower top distillate to flow back into the second rectifying tower.
According to the tertiary butanol purification system disclosed by the utility model, a condenser is arranged between the top of the second rectifying tower and the reflux tank of the second rectifying tower.
According to the tertiary butanol purification system disclosed by the utility model, the top of the first rectifying tower is provided with a reflux branch line.
According to the tertiary butanol purification system disclosed by the utility model, a side line extraction pipeline is arranged on the body of the second rectifying tower.
The tert-butyl alcohol purification system provided by the utility model is characterized in that the pervaporation membrane is one selected from a molecular sieve membrane, a chitosan membrane, a PVA membrane, a sodium alginate membrane and a polyion compound membrane material based on polyacrylic acid.
The tert-butyl alcohol purification system provided by the utility model is characterized in that the pervaporation membrane is a molecular sieve membrane.
The utility model has the beneficial effects that:
1. the tertiary butanol refining system using tertiary butanol as a byproduct in the production of propylene oxide by a co-oxidation method is provided, and a device is provided for a system which is difficult to separate, such as tertiary butanol-water, isobutanol-tertiary butanol, methanol, tertiary butanol and the like, because of the nature of the raw materials, so that the purity of the tertiary butanol reaches more than 99.5%.
2. The vacuum system is adopted, no other solvent is introduced, the operation is convenient, the energy consumption is low, and the byproduct tert-butyl alcohol of propylene oxide can be fully utilized.
Drawings
FIG. 1 is a schematic illustration of a process flow of a tertiary butanol purification system according to the present utility model;
FIG. 2 is a schematic diagram of another process flow of the tertiary butanol purification system of the present utility model.
Wherein, the reference numerals:
1-isobutanol removal unit, 2-dehydration unit, 3-methanol removal unit, 11-first rectifying tower, 21-vapor permeation device, 31-second rectifying tower and 32-reflux tank.
Detailed Description
The following detailed description, given in conjunction with the accompanying drawings, describes the utility model in detail, but is not intended to limit the utility model.
As shown in FIG. 1, the tertiary butanol purification system provided by the utility model comprises an isobutanol removal unit, a dehydration unit and a methanol removal unit; the isobutanol removing unit comprises a first rectifying tower for removing isobutanol in the crude tertiary butanol product, the dehydration unit comprises a steam permeation device for removing water, and the methanol removing unit comprises a second rectifying tower for removing methanol. The vapor permeation device comprises a pervaporation membrane, a interception side and a permeation side, the top of the first rectifying tower is communicated with the interception side of the vapor permeation device, an interception side outlet of the vapor permeation device is connected with the second rectifying tower, and a high-purity tertiary butanol extraction pipeline is connected with the tower bottom of the second rectifying tower.
The tert-butyl alcohol raw material of the byproduct of the production of propylene oxide by the co-oxidation method firstly enters a first rectifying tower 11 for isobutanol-tert-butyl alcohol separation, isobutanol materials are extracted from the tower bottom of the first rectifying tower, the materials which are extracted from the gas phase at the top of the first rectifying tower and are used for removing isobutanol enter a vapor permeation device 21 for dehydration, the vapor partial pressure of water in the other side of the membrane is smaller than the saturated vapor pressure of the water, water molecules continuously permeate through the membrane by means of the difference of the vapor partial pressures formed at the two sides of the membrane, water materials are obtained after condensation at the permeation side, tert-butyl alcohol materials which are used for removing most of water are obtained after condensation at the interception side, the dehydrated tert-butyl alcohol materials at the interception side enter a second rectifying tower 31 for separation, and the high-purity tert-butyl alcohol is extracted from the tower bottom of the second rectifying tower. In a preferred embodiment, the second rectification column has a tray number of 30, and the stream exiting the cut-off side is fed at 14, 16 or 18 stages.
In a specific embodiment of the utility model, a second rectifying tower reflux tank for returning the overhead distillate into the second rectifying tower is connected to the top of the second rectifying tower, and a part of methanol, water and a small amount of tertiary butanol which are the overhead products of the second rectifying tower are used for reflux, and a part of methanol, water and a small amount of tertiary butanol are extracted. In a preferred embodiment, a condenser is arranged between the top of the second rectifying tower and the reflux drum of the second rectifying tower.
In one specific embodiment of the utility model, the top of the first rectifying tower is provided with a reflux branch line, and a part of the material which is extracted from the gas phase at the top of the first rectifying tower and is used for removing the isobutanol is directly connected with a vapor permeation device; a portion is directly connected to the condenser for reflux.
In an embodiment of the present utility model, as shown in fig. 2, a side-draw line is arranged on the second rectifying tower body, so that the purity of the tertiary butanol is better, and the color is better.
In the present utility model, the first rectifying tower, the vapor permeation device and the second rectifying tower condenser are all common devices in the field, and the present utility model is not particularly limited.
In the present utility model, the pervaporation membrane for the vapor permeation mechanism 21 is a commercial water permeable membrane. The water permeable membrane is selected from one of a molecular sieve membrane, a chitosan membrane, a PVA membrane, a sodium alginate membrane or a polyion compound membrane material based on polyacrylic acid, and is preferably a molecular sieve membrane.
Of course, the present utility model is capable of other various embodiments and its several details are capable of modification and variation in light of the present utility model by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (7)
1. A tertiary butanol purification system comprising: the device comprises a first rectifying tower for removing isobutanol in a crude tertiary butanol product, a steam permeation device for removing water and a second rectifying tower for removing methanol, wherein the steam permeation device comprises a pervaporation membrane, a interception side and a permeation side, the top of the first rectifying tower is communicated with the interception side of the steam permeation device, an interception side outlet of the steam permeation device is connected with the second rectifying tower, and a tower kettle of the second rectifying tower is connected with a high-purity tertiary butanol extraction pipeline.
2. The tert-butanol purification system of claim 1, wherein a second rectifying column reflux drum for refluxing an overhead into the second rectifying column is connected to the top of the second rectifying column.
3. The tert-butanol purification system according to claim 2, wherein a condenser is provided between the top of the second rectifying column and the reflux drum of the second rectifying column.
4. The tert-butanol purification system of claim 1, wherein the first rectifying column top is provided with a reflux branch.
5. The tertiary butanol purification system of claim 1, wherein the second rectifying column body is provided with a side draw line.
6. The tertiary butanol purification system of claim 1, wherein the pervaporation membrane is selected from the group consisting of a molecular sieve membrane, a chitosan membrane, a PVA membrane, a sodium alginate membrane, and a polyacrylic acid based polyionic compound membrane material.
7. The tert-butanol purification system of claim 1, wherein the pervaporation membrane is a molecular sieve membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223233313.0U CN219209021U (en) | 2022-11-28 | 2022-11-28 | Tertiary butanol purifying system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223233313.0U CN219209021U (en) | 2022-11-28 | 2022-11-28 | Tertiary butanol purifying system |
Publications (1)
| Publication Number | Publication Date |
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| CN219209021U true CN219209021U (en) | 2023-06-20 |
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| CN202223233313.0U Active CN219209021U (en) | 2022-11-28 | 2022-11-28 | Tertiary butanol purifying system |
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- 2022-11-28 CN CN202223233313.0U patent/CN219209021U/en active Active
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