CN210419813U - Acetonitrile purification device - Google Patents
Acetonitrile purification device Download PDFInfo
- Publication number
- CN210419813U CN210419813U CN201920396127.8U CN201920396127U CN210419813U CN 210419813 U CN210419813 U CN 210419813U CN 201920396127 U CN201920396127 U CN 201920396127U CN 210419813 U CN210419813 U CN 210419813U
- Authority
- CN
- China
- Prior art keywords
- acetonitrile
- extraction tower
- extraction
- tower
- dichloromethane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 238000000746 purification Methods 0.000 title claims abstract description 16
- 238000000605 extraction Methods 0.000 claims abstract description 85
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims abstract description 83
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000007787 solid Substances 0.000 abstract description 4
- 239000002910 solid waste Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 239000012452 mother liquor Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- -1 acetonitrile-calcium chloride Chemical compound 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Extraction Or Liquid Replacement (AREA)
Abstract
The utility model discloses an acetonitrile purification device, including extraction column and rectifying column, be provided with dichloromethane dog-house and thick acetonitrile dog-house on the extraction column, the below of extraction column is provided with the dichloromethane collector, the extraction column is provided with an at least. The utility model has the advantages that: utilize dichloromethane and acetonitrile to be mutually soluble and slightly soluble in the characteristic of water, extract the acetonitrile through dichloromethane, prepare high-purity acetonitrile through the rectification, do not produce solid useless among the whole purification process, the effectual cost of handling solid useless that has reduced has effectively reduced the purification cost of acetonitrile, and the influence that causes the environment is little.
Description
Technical Field
The invention relates to the fine preparation of acetonitrile, in particular to an acetonitrile device.
Background
Acetonitrile is an important organic intermediate and is widely applied to various fields. In the prior art, after the preparation of acetonitrile is completed, purification is usually performed, and the process steps usually adopted in the prior art are as follows: crude acetonitrile-crude distillation (atmospheric distillation) to obtain acetonitrile-calcium chloride with 84% of content, absorbing water to obtain acetonitrile with 99% of content, and rectification to obtain acetonitrile with 99.9% of content. However, by adopting such a purification method, the calcium chloride after water absorption cannot be used continuously and needs to be treated as solid waste, and the calcium chloride after water absorption is difficult to treat, generates a large amount of solid waste, causes great pollution to the environment, and increases the cost for treating the solid waste by enterprises.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for purifying acetonitrile, which can effectively reduce solid waste.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the acetonitrile purification device comprises an extraction tower and a rectification tower, wherein a dichloromethane feeding port and a crude acetonitrile feeding port are formed in the extraction tower, a dichloromethane collector is arranged below the extraction tower, and the extraction tower is provided with at least one seat.
The extraction tower is provided with two extraction towers, the two extraction towers comprise a first extraction tower and a second extraction tower, the tower top of the first extraction tower is communicated with the tower bottom of the second extraction tower through a water pump and a pipeline, the dichloromethane collector of the second extraction tower is communicated with the tower body of the first extraction tower through the water pump and the pipeline, and the tower top of the second extraction tower is communicated with the tower bottom of the rectification tower through the water pump and the pipeline.
The extraction tower is provided with three extraction towers, the extraction tower comprises a first extraction tower, a second extraction tower and a third extraction tower, the tower top of the first extraction tower is communicated with the tower bottom of the second extraction tower through a water pump and a pipeline, a dichloromethane collector of the second extraction tower is communicated with a tower body of the first extraction tower through a water pump and a pipeline, the tower top of the second extraction tower is communicated with the tower bottom of the third extraction tower through a water pump and a pipeline, a dichloromethane collector of the third extraction tower is communicated with the tower body of the second extraction tower through a water pump and a pipeline, and the tower top of the third extraction tower is communicated with the tower bottom of the rectification tower through a water pump and a pipeline.
Adopt above-mentioned technical scheme, owing to utilize dichloromethane and acetonitrile to be mutually soluble and the characteristic of slightly being soluble in water, extract the acetonitrile through dichloromethane, prepare high-purity acetonitrile through the rectification, do not produce solid useless in the whole purification process, the effectual cost of handling solid useless that has reduced has effectively reduced the purification cost of acetonitrile, and the influence that causes the environment is little.
Drawings
Fig. 1 is a schematic view of the overall mechanism of the acetonitrile purification apparatus of the present invention.
Detailed Description
The following further describes the embodiments of the present invention. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, the present embodiment discloses an acetonitrile purification apparatus, which comprises an extraction column 1 and a rectification column 2, wherein the extraction column 1 is provided with a dichloromethane feeding port and a crude acetonitrile feeding port, a dichloromethane collector is arranged below the extraction column 1, and the extraction column is provided with at least one seat.
In this embodiment, the extraction tower may include three extraction towers, including a first extraction tower 11, a second extraction tower 12, and a third extraction tower 13, the top of the first extraction tower 11 is communicated with the bottom of the second extraction tower 12 through a water pump and a pipeline, the methylene dichloride collector 123 of the second extraction tower 12 is communicated with the body of the first extraction tower 11 through a water pump and a pipeline, the top of the second extraction tower 12 is communicated with the bottom of the third extraction tower 13 through a water pump and a pipeline, the methylene dichloride collector 133 of the third extraction tower 13 is communicated with the body of the second extraction tower 12 through a water pump and a pipeline, and the top of the third extraction tower 13 is communicated with the bottom of the rectification tower 2 through a water pump and a pipeline.
The first extraction tower 11 is provided with a first dichloromethane adding port 111 and a first acetonitrile adding port 112, the lower part of the first extraction tower is provided with a first dichloromethane collector 113, the second extraction tower 12 is provided with a second dichloromethane adding port 121 and a second acetonitrile adding port 122, the lower part of the second extraction tower is provided with a second dichloromethane collector 123, the third extraction tower 13 is provided with a third dichloromethane adding port 131 and a first acetonitrile adding port 132, and the lower part of the third extraction tower is provided with a third dichloromethane collector 133. The first dichloromethane collector 113, the second dichloromethane collector 123 and the third dichloromethane collector 133 are used for collecting the extraction mother liquor. The extraction mother liquor of the second extraction tower 12 and the third extraction tower 13 can be pumped to the first extraction tower 12 for reuse. And acetonitrile and an extraction liquid adding port are arranged on each extraction tower, so that extraction liquid can be supplemented and the extraction liquid can be flexibly used and combined. Other numbers of extraction columns may be used in other embodiments of the invention, as appropriate, depending on the purity of the crude acetonitrile.
Feasible rectifying column 2 includes pan feeding mouth 21, discharge gate 22, shaft 23 and base 24, and shaft 23 passes through base 24 to be fixed, and pan feeding mouth 21 is located the extraction liquid that the side connection extraction column of shaft 23 received out, and discharge gate 22 is located the top of shaft 23 and is used for discharging finished product material.
The principle of the invention is that the methylene dichloride is used for extracting the acetonitrile by utilizing the characteristic that the methylene dichloride and the acetonitrile are mutually soluble and slightly soluble in water, and the high-purity acetonitrile is prepared by rectification, so that no solid waste is generated in the whole purification process, the cost for treating the solid waste is effectively reduced, the purification cost of the acetonitrile is effectively reduced, and the influence on the environment is small.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (2)
1. The acetonitrile purification device is characterized by comprising an extraction tower and a rectification tower, wherein a dichloromethane feeding port and a crude acetonitrile feeding port are formed in the extraction tower, a dichloromethane collector is arranged below the extraction tower, at least one extraction tower is arranged on the extraction tower, the extraction tower is provided with two extraction towers, the extraction tower comprises a first extraction tower and a second extraction tower, the top of the first extraction tower is communicated with the bottom of the second extraction tower through a water pump and a pipeline, the dichloromethane collector of the second extraction tower is communicated with the body of the first extraction tower through a water pump and a pipeline, and the top of the second extraction tower is communicated with the bottom of the rectification tower through a water pump and a pipeline.
2. The acetonitrile purification device according to claim 1, wherein the rectification column comprises a feed inlet, a discharge outlet, a column body and a base, the column body is fixed by the base, the feed inlet is positioned at the side edge of the column body and connected with the upper end of the extraction column, and the discharge outlet is positioned above the column body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920396127.8U CN210419813U (en) | 2019-03-26 | 2019-03-26 | Acetonitrile purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920396127.8U CN210419813U (en) | 2019-03-26 | 2019-03-26 | Acetonitrile purification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210419813U true CN210419813U (en) | 2020-04-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920396127.8U Expired - Fee Related CN210419813U (en) | 2019-03-26 | 2019-03-26 | Acetonitrile purification device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210419813U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112194596A (en) * | 2020-11-06 | 2021-01-08 | 山东汇海医药化工有限公司 | Method for recovering acetonitrile in synthetic acetonitrile ammonia water |
-
2019
- 2019-03-26 CN CN201920396127.8U patent/CN210419813U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112194596A (en) * | 2020-11-06 | 2021-01-08 | 山东汇海医药化工有限公司 | Method for recovering acetonitrile in synthetic acetonitrile ammonia water |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200428 |
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| CF01 | Termination of patent right due to non-payment of annual fee |