CN220824670U - Separation and purification device of 2, 2-dimethoxy propane - Google Patents
Separation and purification device of 2, 2-dimethoxy propane Download PDFInfo
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- CN220824670U CN220824670U CN202322582322.9U CN202322582322U CN220824670U CN 220824670 U CN220824670 U CN 220824670U CN 202322582322 U CN202322582322 U CN 202322582322U CN 220824670 U CN220824670 U CN 220824670U
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- separation
- membrane separator
- storage tank
- condenser
- dimethoxypropane
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- HEWZVZIVELJPQZ-UHFFFAOYSA-N 2,2-dimethoxypropane Chemical compound COC(C)(C)OC HEWZVZIVELJPQZ-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 238000000926 separation method Methods 0.000 title claims abstract description 40
- 238000000746 purification Methods 0.000 title claims abstract description 37
- 239000012528 membrane Substances 0.000 claims abstract description 52
- 238000003860 storage Methods 0.000 claims abstract description 30
- 238000005373 pervaporation Methods 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims description 26
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000008595 infiltration Effects 0.000 claims 4
- 238000001764 infiltration Methods 0.000 claims 4
- 238000000034 method Methods 0.000 abstract description 11
- 239000012466 permeate Substances 0.000 abstract description 8
- 239000000047 product Substances 0.000 abstract description 8
- 239000012465 retentate Substances 0.000 abstract description 7
- 238000001308 synthesis method Methods 0.000 abstract description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 30
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 20
- 239000011259 mixed solution Substances 0.000 description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 16
- 239000005543 nano-size silicon particle Substances 0.000 description 7
- 235000012239 silicon dioxide Nutrition 0.000 description 7
- 239000004372 Polyvinyl alcohol Substances 0.000 description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000006482 condensation reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012024 dehydrating agents Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000002363 herbicidal effect Effects 0.000 description 1
- 239000004009 herbicide Substances 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000003223 protective agent Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model provides a separation and purification device of 2, 2-dimethoxypropane, which comprises a storage tank, a heat exchanger, a membrane separator, a first condenser and a rectifying tower which are sequentially connected, wherein a pervaporation membrane is arranged in the membrane separator, the pervaporation membrane divides the membrane separator into a retentate chamber and a permeate chamber, the storage tank, the heat exchanger, the retentate chamber of the membrane separator, the first condenser and the rectifying tower are sequentially communicated through pipelines, and the permeate chamber of the membrane separator is sequentially communicated with a second condenser and a vacuum pump through pipelines; the method solves the technical problem that the product separation and purification are difficult in the existing 2, 2-dimethoxy propane synthesis method, and can be widely applied to the technical field of separation and purification.
Description
Technical Field
The utility model relates to the technical field of separation and purification, in particular to a separation and purification device for 2, 2-dimethoxy propane.
Background
2, 2-Dimethoxy propane is a very important organic matter, can be used as a protective agent, a shrinking agent, a condensing agent, a herbicide, a dehydrating agent, an insecticide and the like, and has wide application in the development and industrial production of fine chemical products such as medicines, pesticides, natural products and the like, so that the 2, 2-dimethoxy propane has important significance in the research of the synthesis of the 2, 2-dimethoxy propane.
At present, two main methods for synthesizing 2, 2-dimethoxy propane are available: direct and indirect processes. The direct method is to prepare 2, 2-dimethoxy propane by direct condensation reaction with methanol and acetone as raw materials. The method has the advantages of low cost and easy availability of raw materials and simple production process, but the method obtains a2, 2-dimethoxy propane mixed solution through the condensation reaction of methanol and acetone, and the mixed solution mainly contains four components of methanol, acetone, water and 2, 2-dimethoxy propane, and the four components can form four pairs of azeotropes: the mixed solution of the 2, 2-dimethoxy propane is separated and purified by a rectifying tower to obtain the product 2, 2-dimethoxy propane. However, the separation and purification effect is limited only by the rectifying tower, so that the separation and purification of the product are difficult, the post-treatment process is difficult, and the industrial production is not easy. This problem is to be solved.
Disclosure of utility model
The application aims to provide a separation and purification device for 2, 2-dimethoxypropane, which aims to solve the technical problem that the product separation and purification are difficult in the existing 2, 2-dimethoxypropane synthesis method.
The embodiment of the application provides a separation and purification device for 2, 2-dimethoxypropane, which comprises a storage tank, a heat exchanger, a membrane separator, a first condenser and a rectifying tower which are sequentially connected, wherein a pervaporation membrane is arranged in the membrane separator, the pervaporation membrane divides the membrane separator into a residual osmosis chamber and a permeation chamber, the storage tank, the heat exchanger, the residual osmosis chamber of the membrane separator, the first condenser and the rectifying tower are sequentially communicated through pipelines, and the permeation chamber of the membrane separator is sequentially communicated with a second condenser and a vacuum pump through pipelines.
In one embodiment, the system further comprises a first feed pump and a second feed pump, wherein the first feed pump is arranged on a pipeline between the storage tank and the heat exchanger, and the second feed pump is arranged on a pipeline between the first condenser and the rectifying tower.
In one embodiment, the storage tank is provided with a feed valve and a discharge valve, and the discharge valve is arranged on a pipeline between the storage tank and the first feed pump.
In one embodiment, a flow meter and a flow regulating valve are arranged on a pipeline between the heat exchanger and the membrane separator.
In one embodiment, the storage tank is further provided with a first upper limit liquid level switch and a lower limit liquid level switch.
In one embodiment, the other end of the vacuum pump is communicated with a collecting tank, and a discharging valve is arranged on the collecting tank.
In one embodiment, a second upper limit liquid level switch is further arranged on the collecting tank.
The application provides a separation and purification device for 2, 2-dimethoxy propane, which has the beneficial effects that: through the cooperation of the membrane separator and the rectifying tower, the water is removed from the 2, 2-dimethoxy propane mixed solution through the pervaporation membrane, and then the methanol and the acetone are separated out through the rectifying tower, so that the high-purity 2, 2-dimethoxy propane can be obtained, the separation and purification of the 2, 2-dimethoxy propane are realized, the technical problem that the product separation and purification are difficult when the direct method is adopted for preparing the 2, 2-dimethoxy propane is solved, the purity of the 2, 2-dimethoxy propane is improved, the separated methanol and acetone can be recycled, and the production cost is reduced.
Drawings
FIG. 1 is a schematic diagram of a separation and purification apparatus for 2, 2-dimethoxypropane according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a separation and purification device for 2, 2-dimethoxypropane according to a second embodiment of the present application.
The symbols in the drawings illustrate:
1. A storage tank; 101. a feed valve; 102. a discharge valve; 103. a first upper limit level switch; 104. a lower limit liquid level switch; 2. a first feed pump; 3. a heat exchanger; 4. a membrane separator; 401. a pervaporation membrane; 402. a residual seeping chamber; 403. a permeate chamber; 5. a first condenser; 6. a second feed pump; 7. a rectifying tower; 8. a second condenser; 9. a vacuum pump; 10. a collection tank; 1001. a discharge valve; 1002. a second upper limit level switch; 11. a flow meter; 12. a flow regulating valve.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
It should be noted that, the positional or positional relationship indicated by the terms such as "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", etc. are based on the positional or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and are not to be construed as indicating or implying that the apparatus or element in question must be provided with a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Example 1
Referring to fig. 1, a schematic structural diagram of a separation and purification apparatus for 2, 2-dimethoxypropane according to a first embodiment of the present application is shown, for convenience of explanation, only the parts related to this embodiment are shown, and the details are as follows:
The separation and purification device of 2, 2-dimethoxy propane comprises a storage tank 1, a heat exchanger 3, a membrane separator 4, a first condenser 5 and a rectifying tower 7 which are sequentially connected, wherein a pervaporation membrane 401 is arranged in the membrane separator 4, the pervaporation membrane 401 divides the membrane separator 4 into a retentate chamber 402 and a permeate chamber 403, the storage tank 1, the heat exchanger 3, the retentate chamber 402 of the membrane separator 4, the first condenser 5 and the rectifying tower 7 are sequentially communicated through pipelines, a second condenser 8 and a vacuum pump 9 are sequentially connected to the permeate chamber 403 of the membrane separator 4, and the permeate chamber 403, the second condenser 8 and the vacuum pump 9 are sequentially communicated through pipelines;
Through the cooperation of the membrane separator 4 and the rectifying tower 7, the water is removed from the 2, 2-dimethoxy propane mixed solution through the pervaporation membrane 401, and then the methanol and the acetone are separated through the rectifying tower 7, so that the high-purity 2, 2-dimethoxy propane can be obtained, the separation and purification of the 2, 2-dimethoxy propane are realized, the technical problem that the separation and purification of products existing in the preparation of the 2, 2-dimethoxy propane by adopting a direct method are difficult is solved, the purity of the 2, 2-dimethoxy propane is improved, the separated methanol and acetone can be recycled, and the production cost is reduced.
Specifically, the separation and purification device further comprises a first feed pump 2 and a second feed pump 6, wherein the first feed pump 2 is arranged on a pipeline between the storage tank 1 and the heat exchanger 3, the second feed pump 6 is arranged on a pipeline between the first condenser 5 and the rectifying tower 7, and the 2, 2-dimethoxy propane mixed solution sequentially flows to the heat exchanger 3, the membrane separator 4, the first condenser 5 and the rectifying tower 7 under the action of the first feed pump 2 and the second feed pump 6;
The storage tank 1 is provided with a feed valve 101 and a discharge valve 102, the discharge valve 102 is arranged on a pipeline between the storage tank 1 and the first feed pump 2, the feed valve 101 is used for introducing 2, 2-dimethoxypropane mixed solution obtained by the synthesis reaction of 2, 2-dimethoxypropane into the storage tank 1, and the discharge valve 102 is used for controlling the outflow of the 2, 2-dimethoxypropane mixed solution;
A flow meter 11 and a flow regulating valve 12 are connected in series on a pipeline between the heat exchanger 3 and the membrane separator 4, when the flow of the 2, 2-dimethoxy propane mixed solution which is displayed by the flow meter 11 and is introduced into the membrane separator 4 exceeds a limit value, the flow regulating valve 12 can be used for regulating and controlling, so that the separation effect of the membrane separator 4 is prevented from being influenced by overlarge flow;
In this embodiment, the pervaporation membrane 401 is a nano silica modified polyvinyl alcohol pervaporation membrane, and the specific preparation method thereof is as follows: adding nano silicon dioxide and polyvinyl alcohol into water according to the mass ratio of 1.2:98.8, preserving heat for 7 hours at the temperature of more than 95 ℃ to dissolve the nano silicon dioxide and the polyvinyl alcohol, obtaining an aqueous solution containing the nano silicon dioxide, standing, cooling and defoaming, then adopting a tape casting method to prepare a film on a clean glass plate, naturally airing the film, and then drying the film at the temperature of 150 ℃ for 2.5 hours to obtain the nano silicon dioxide modified polyvinyl alcohol pervaporation film adopted by the embodiment, wherein the nano silicon dioxide and the polyvinyl alcohol are purchased from the market; the embodiment adopts the nano silicon dioxide modified polyvinyl alcohol pervaporation membrane, and the nano silicon dioxide has good hydrophilicity, thereby being beneficial to permeation and diffusion of water molecules; in actual operation, other types of pervaporation membranes with the function of separating water can be selected;
The other end of the vacuum pump 9 is communicated with a collecting tank 10, a discharging valve 1001 is arranged on the collecting tank 10, the collecting tank 10 is used for collecting water separated and removed by the membrane separator 4, and the discharging valve 1001 is used for controlling water outflow;
2, 2-dimethoxy propane mixed solution is stored in the storage tank 1, the 2, 2-dimethoxy propane mixed solution is preheated to a certain temperature through the heat exchanger 3, then enters the retentate chamber 402 of the membrane separator 4 to contact with the pervaporation membrane 401, water molecules diffuse and permeate through the pervaporation membrane 401 to enter the permeate chamber 403 under the action of the vacuum pump 9 to form water vapor, the water vapor enters the second condenser 8 to be condensed into liquid, and separation and removal of water in the 2, 2-dimethoxy propane mixed solution are realized; condensing the residual liquid obtained after water removal by a first condenser 5, and then entering a rectifying tower 7 for further separation and purification to obtain 2, 2-dimethoxy propane.
The working principle of the separation and purification device for 2, 2-dimethoxypropane in this embodiment is described as follows:
When the device is used, a feed valve 101 on a storage tank 1 is connected with a 2, 2-dimethoxypropane synthesis device, the feed valve 101 and a discharge valve 102 are opened, a 2, 2-dimethoxypropane mixed solution obtained by synthesis reaction is introduced into the storage tank 1, under the action of a first feed pump 2, the 2, 2-dimethoxypropane mixed solution flows to a heat exchanger 3 through the discharge valve 102, after being preheated by the heat exchanger 3, the 2, 2-dimethoxypropane mixed solution enters a membrane separator 4, the separation and removal of water in the 2, 2-dimethoxypropane mixed solution are realized under the action of a vacuum pump 9, and then retentate in a retentate chamber 402 enters a rectifying tower 7 for further separation and purification after being condensed by a first condenser 5 under the action of a second feed pump 6, so that high-purity 2, 2-dimethoxypropane is finally obtained, and separated methanol and acetone can be recycled; the water separated and removed by the membrane separator 4 is condensed into water under the action of the second condenser 8, and then is collected in the collecting tank 10 under the action of the vacuum pump 9, and the drainage or recovery post-treatment can be realized through the discharge valve 1001.
Example two
Referring to fig. 2, a schematic structural diagram of a separation and purification apparatus for 2, 2-dimethoxypropane according to a second embodiment of the present application is shown, for convenience of explanation, only the parts related to this embodiment are shown, and the details are as follows:
Compared with the first embodiment, the present embodiment is different in that: the storage tank 1 of the embodiment is also provided with a first upper limit liquid level switch 103 and a lower limit liquid level switch 104 which are used for judging the liquid level in the storage tank 1; when the liquid level in the storage tank 1 is lower than the lower limit liquid level switch 104, the lower limit liquid level switch 104 gives an alarm, and at the moment, the discharge valve 102 needs to be closed immediately, so that idling of the first feed pump2 and the second feed pump 6 caused by too little amount of 2, 2-dimethoxypropane mixed solution is avoided, and the service lives of the first feed pump2 and the second feed pump 6 are prolonged; when the liquid level in the storage tank 1 is higher than the first upper limit liquid level switch 103, the first upper limit liquid level switch 103 gives an alarm, and at the moment, the feeding valve 101 needs to be closed immediately, so that the safety of the separation and purification process is improved.
The second upper limit liquid level switch 1002 is further provided on the collecting tank 10, and is used for judging the level of the liquid in the collecting tank 10, when the liquid level in the collecting tank 10 is higher than the second upper limit liquid level switch 1002, the second upper limit liquid level switch 1002 can give an alarm, and at this time, the drain valve 1001 needs to be opened immediately, so that the water in the collecting tank 10 is drained or recycled.
The working principle of the separation and purification device for 2, 2-dimethoxypropane in this embodiment is described as follows:
When the mixed solution of 2, 2-dimethoxy propane is separated and purified, when the lower limit liquid level switch 104 on the storage tank 1 alarms, the discharging valve 102 needs to be closed immediately, and when the first upper limit liquid level switch 103 on the storage tank 1 alarms, the feeding valve 101 needs to be closed immediately; when the second upper limit liquid level switch 1002 on the collection tank 10 alarms, the drain valve 1001 needs to be opened immediately to drain or recover the water in the collection tank 10 for post-treatment.
The application provides a separation and purification device for 2, 2-dimethoxypropane, which is characterized in that a membrane separator is arranged to be matched with a rectifying tower for use, water is removed from a 2, 2-dimethoxypropane mixed solution through a pervaporation membrane, and then methanol and acetone are separated through the rectifying tower, so that the high-purity 2, 2-dimethoxypropane can be obtained, the separation and purification of the 2, 2-dimethoxypropane are realized, the technical problem that the separation and purification of a product existing in the preparation of the 2, 2-dimethoxypropane by adopting a direct method are difficult is solved, the purity of the 2, 2-dimethoxypropane is improved, the separated methanol and acetone can be recycled, the production cost is reduced, and the separation and purification device can be widely applied to the technical field of separation and purification.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (7)
1. The utility model provides a separation and purification device of 2, 2-dimethoxy propane, its characterized in that includes storage tank, heat exchanger, membrane separator, first condenser and rectifying column that connect gradually, be equipped with the pervaporation membrane in the membrane separator, the pervaporation membrane will the membrane separator divide into two parts of infiltration room and infiltration room, the storage tank the heat exchanger the infiltration room of membrane separator first condenser with be linked together through the pipeline in proper order between the rectifying column, there are second condenser and vacuum pump on the infiltration room of membrane separator through the pipeline intercommunication in proper order.
2. The apparatus according to claim 1, further comprising a first feed pump and a second feed pump, wherein the first feed pump is disposed on a line between the storage tank and the heat exchanger, and the second feed pump is disposed on a line between the first condenser and the rectifying column.
3. The apparatus according to claim 2, wherein the storage tank is provided with a feed valve and a discharge valve, and the discharge valve is provided on a line between the storage tank and the first feed pump.
4. The separation and purification apparatus for 2, 2-dimethoxypropane according to claim 1, wherein a flow meter and a flow regulating valve are provided on a pipeline between the heat exchanger and the membrane separator.
5. The separation and purification device for 2, 2-dimethoxypropane according to claim 1, wherein the storage tank is further provided with a first upper limit liquid level switch and a first lower limit liquid level switch.
6. The separation and purification device for 2, 2-dimethoxypropane according to claim 1, wherein the other end of the vacuum pump is communicated with a collecting tank, and a discharge valve is arranged on the collecting tank.
7. The apparatus for separating and purifying 2, 2-dimethoxypropane according to claim 6, wherein the collection tank is further provided with a second upper limit liquid level switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322582322.9U CN220824670U (en) | 2023-09-22 | 2023-09-22 | Separation and purification device of 2, 2-dimethoxy propane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322582322.9U CN220824670U (en) | 2023-09-22 | 2023-09-22 | Separation and purification device of 2, 2-dimethoxy propane |
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| Publication Number | Publication Date |
|---|---|
| CN220824670U true CN220824670U (en) | 2024-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322582322.9U Active CN220824670U (en) | 2023-09-22 | 2023-09-22 | Separation and purification device of 2, 2-dimethoxy propane |
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| Country | Link |
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| CN (1) | CN220824670U (en) |
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2023
- 2023-09-22 CN CN202322582322.9U patent/CN220824670U/en active Active
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