CN206570250U - The refining plant of accessory substance acetonitrile in a kind of acrylonitrile process - Google Patents
The refining plant of accessory substance acetonitrile in a kind of acrylonitrile process Download PDFInfo
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- CN206570250U CN206570250U CN201621168437.7U CN201621168437U CN206570250U CN 206570250 U CN206570250 U CN 206570250U CN 201621168437 U CN201621168437 U CN 201621168437U CN 206570250 U CN206570250 U CN 206570250U
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- reactor
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- extractive distillation
- acetonitrile
- distillation column
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Abstract
The refining plant of accessory substance acetonitrile in a kind of acrylonitrile process.Belong to petrochemical equipment technical field, in Acrylonitrile Production accessory substance acetonitrile it is refined.Including a reactor preheater, a reactor, a rectifying column and a divided wall extractive distillation column.Divided wall extractive distillation column is that a vertical wall is set in common rectifying tower, is connected at the top of the vertical wall with tower top, rectifying column is divided into three regions：Feed side, non-feed side and public stripping zone.The advantage of the device：One DWC tower will extract acetonitrile and extractant reclaims two processes and merges the progress in a rectifying column, enormously simplify technological process, equipment investment and energy consumption are significantly reduced.Subtractive process for accessory substance acetonitrile in acrylonitrile process.
Description
Technical field
The utility model is related to a kind of refining plant of accessory substance acetonitrile in acrylonitrile process.
Background technology
Acetonitrile is a kind of quite extensive Organic Chemicals of application, except being used as in petro chemical industry from alkene and chain
Outside the extractant that butadiene and isoprene are extracted in alkane, organic synthesis, medicine, agricultural chemicals, surface work are also widely used as
The synthesis material of the fine chemicals such as property agent.Current ammoxidation of propylene production acrylonitrile is while the acetonitrile of by-product is industrial production second
The main source of nitrile, accounts for the 2%-3% of acrylonitrile yield.
Because the seventies acetonitrile rate of recovery of last century six is low, cost is high, using the reason such as wideless, many acrylonitrile process
Producer burns up crude acetonitrile as fuel or fallen by deep-well injection treatment, no to utilize resource well.With science and technology
It is growing, the application of acetonitrile is increasingly extensive, acetonitrile recycle also by it is higher and higher pay attention to.
The crude acetonitrile come from acrylonitrile installation contains the impurity such as micro hydrogen cyanide, acrylonitrile, water.Acetonitrile is with water simultaneously
One binary azeotropic system for dissolving each other completely（Water 16%, acetonitrile 84%, 76 DEG C of constant boiling point）, therefore be difficult to using conventional distillation technology
Water is removed.One of separating technology of current acetonitrile-water thing system is extracting rectifying, but traditional extracting rectifying has floor space
Greatly, the shortcomings of high energy consumption.
The content of the invention
In view of the above-mentioned problems, the utility model provides a kind of refining plant of accessory substance acetonitrile in acrylonitrile process, the dress
Put principle simple, a reactor preheater, a reactor, a rectifying column and a divided wall extractive distillation column can be passed through
With reference to reaching the purpose that is refined the crude acetonitrile in acrylonitrile process.
The refining plant of accessory substance acetonitrile in a kind of acrylonitrile process, he is by a reactor preheater, a reaction
Device, a rectifying column and a divided wall extractive distillation column composition.Reactor preheater delivers to reactor after material is heated, instead
Addition sodium hydroxide solution in device is answered to be chemically reacted, the remaining hydrogen cyanide of consumption and acrylonitrile are subsequently sent to rectifying column, rectifying
Tower produces heavy constituent in material from tower reactor, and light component is from overhead extraction, and overhead condensation liquid delivers to divided wall extractive distillation column, no
Solidifying pneumatic transmission to incinerator is burnt, and divided wall extractive distillation column is that a vertical wall is set in common rectifying tower, at the top of the wall
Tower top is connected, tower is divided into 3 regions, respectively feed side, non-feed side and public stripping zone, material and extractant are from entering
Material side enters divided wall extractive distillation column.
The beneficial effects of the utility model are that the utility model can finely remove the impurity in crude acetonitrile, introducing
Acetonitrile extraction and extractant recovery stage can be merged into a rectifying column by divided wall extractive distillation column.Realize equipment collection
Into integrated with energy, the technological process of prior art is enormously simplify, the floor space of equipment is reduced, under construction investment is obvious
Drop, energy consumption reduction 60%-70%.
Brief description of the drawings
The utility model is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is schematic device of the present utility model.
In Fig. 1,1. reactor preheaters, 2. reactors, 3. rectifying columns, 4. divided wall extractive distillation columns, NaOH states are
Sodium hydroxide solution, Z is that tower reactor produces heavy constituent, and Q is fixed gas, and ACN is high-purity acetonitrile, H2O is industrial water, and C is newly to enter
Extractant, RC is reflux extraction agent, and F feeds for next door wall extractive distillation column.
Embodiment
The utility model is by reactor preheater（1）, reactor（2）, rectifying column（3）And divided wall extractive distillation column
（4）Composition.The reacted device preheater of crude acetonitrile in process for production of acrylonitrile（1）Reactor is delivered to after heating（2）It is interior.In reaction
Device（2）The interior sodium hydroxide solution that adds is subsequently sent to rectifying column to consume remnants hydrogen cyanide and acrylonitrile（3）Separated,
The high-boiling components that hydrogen cyanide and acrylonitrile are generated after being reacted with sodium hydroxide are from rectifying column（3）Tower reactor is discharged, rectifying column（3）Tower
Top condensate liquid delivers to divided wall extractive distillation column（4）It is interior, rectifying column（3）Tower top fixed gas is directly produced, and essence is extracted in dividing wall
Evaporate tower（4）Interior to carry out extraction acetonitrile and extractant is reclaimed, final acetonitrile of high purity is from divided wall extractive distillation column（4）Feed side
Top is produced, and industrial water is from divided wall extractive distillation column（4）Non- feed side at the top of produce, extractant from dividing wall extract essence
Evaporate tower（4）Tower reactor extraction, while flow back reuse.The refined dress of accessory substance acetonitrile in acrylonitrile process of the present utility model
Put simple in construction, more traditional technique is compared, realize integration of equipments and energy is integrated, the technique that enormously simplify prior art
Flow, reduces the floor space of equipment, and construction investment is decreased obviously, energy consumption reduction 60%-70%.
Claims (1)
1. the refining plant of accessory substance acetonitrile in a kind of acrylonitrile process, it be by a reactor preheater, reactor,
One rectifying column and a divided wall extractive distillation column are sequentially connected in series, it is characterised in that：Described reaction preheater outlet
Coupled reaction device, reactor outlet connection rectifying column, rectifying column tower top extraction connection divided wall extractive distillation column；Described reaction
Device preheater delivers to reactor after material is heated；Sodium hydroxide solution is added in described reactor to be chemically reacted, and is disappeared
The remaining hydrogen cyanide of consumption and acrylonitrile, are subsequently sent to rectifying column；Described rectifying column produces heavy constituent in material from tower reactor, light group
Divide from overhead extraction, overhead condensation liquid delivers to divided wall extractive distillation column, and fixed gas is delivered to incinerator and burnt；It is described every
It is that a vertical wall is set in common rectifying tower from wall extractive distillation column, connection tower top, is divided into 3 regions by tower at the top of the wall,
Respectively feed side, non-feed side and public stripping zone, material and extractant enter divided wall extractive distillation column from feed side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621168437.7U CN206570250U (en) | 2016-11-02 | 2016-11-02 | The refining plant of accessory substance acetonitrile in a kind of acrylonitrile process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621168437.7U CN206570250U (en) | 2016-11-02 | 2016-11-02 | The refining plant of accessory substance acetonitrile in a kind of acrylonitrile process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206570250U true CN206570250U (en) | 2017-10-20 |
Family
ID=60062314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621168437.7U Expired - Fee Related CN206570250U (en) | 2016-11-02 | 2016-11-02 | The refining plant of accessory substance acetonitrile in a kind of acrylonitrile process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206570250U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114230487A (en) * | 2021-12-29 | 2022-03-25 | 中国天辰工程有限公司 | Heat energy coupling system and heat energy coupling method for acrylonitrile and acetonitrile production |
| CN114315639A (en) * | 2021-12-29 | 2022-04-12 | 中国天辰工程有限公司 | Heat utilization system and heat utilization method for co-production of acrylonitrile and acetonitrile |
-
2016
- 2016-11-02 CN CN201621168437.7U patent/CN206570250U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114230487A (en) * | 2021-12-29 | 2022-03-25 | 中国天辰工程有限公司 | Heat energy coupling system and heat energy coupling method for acrylonitrile and acetonitrile production |
| CN114315639A (en) * | 2021-12-29 | 2022-04-12 | 中国天辰工程有限公司 | Heat utilization system and heat utilization method for co-production of acrylonitrile and acetonitrile |
| CN114230487B (en) * | 2021-12-29 | 2024-01-23 | 中国天辰工程有限公司 | Production heat energy coupling system and method for acrylonitrile and acetonitrile |
| CN114315639B (en) * | 2021-12-29 | 2024-01-23 | 中国天辰工程有限公司 | Heat utilization system and heat utilization method for co-production of acrylonitrile and acetonitrile |
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| Date | Code | Title | Description |
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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: 20171020 Termination date: 20181102 |
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| CF01 | Termination of patent right due to non-payment of annual fee |