CN207775121U - A kind of amide reconditioner - Google Patents
A kind of amide reconditioner Download PDFInfo
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- CN207775121U CN207775121U CN201721746170.XU CN201721746170U CN207775121U CN 207775121 U CN207775121 U CN 207775121U CN 201721746170 U CN201721746170 U CN 201721746170U CN 207775121 U CN207775121 U CN 207775121U
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- mixer
- amide
- amide oil
- pipeline
- acid solution
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Abstract
The utility model discloses a kind of amide reconditioners, including amide oil separating tank, top connects the first mixer, and the first mixer is also associated with amide oil-piping and aqueous slkali pipeline, amide oil separating tank is also associated with the second mixer, and the second mixer is connected with acid solution pipeline and extraction tower.The utility model amide oil in the first mixer is mixed with aqueous slkali, amide oil is washed using aqueous slkali, it is reacted with part organic acid, it is set to tend to dissolve into lower layer's heavy phase solution, obtained amide oil, which enters back into the second mixer, is added acid solution adjusting pH, is extracted into extraction tower after adjusting back the control environment run to benzene extraction tower.So that the total quality of amide oil is improved, alleviate the pressure of follow-up refining step, extends the cycle of operation of benzene extraction tower.
Description
Technical field
The utility model belongs to caprolactam production field, and in particular to a kind of amide reconditioner.
Background technology
Current Domestic caprolactam production apparatus mainstream is using cyclohexanone oxamidinating method as representative, cyclohexanone oxime and oleum
Acid generates the rearrangement solution containing caprolactam by Beckmann rearrangement, and the main component of rearrangement solution is oleum and acyl in oneself
Amine, the oleum in rearrangement solution occur neutralization reaction with gas ammonia in a crystallizer and generate ammonium sulfate, then divide in a crystallizer
For the ammonium sulfate solution of upper layer caprolactam solution and lower layer, it is amide oil to isolate upper layer caprolactam solution, and amide oil is logical
Later continue a large amount of refining step, including benzene extraction, water extraction, ion exchange, caprolactam water solution add hydrogen, caprolactam water
The processes such as solution concentration, pre-distillation, distillation produce caprolactam product.The technique is up to state standards the horizontal base of high-class product
There is no problem in sheet, but increased with domestic caprolactam producer, and the yield of caprolactam is presented blowout and increases,
Increasingly competitive between industry, enterprise then must depth optimization product quality to promote competitiveness.It further to be promoted in oneself
Amide final product quality must then continue to optimize each pilot process, sustained improvement.
Amide oil is the intermediate products of caprolactam production, the caprolactam containing 70-75% or so in amide oil, 25-
30% or so water, the ammonium sulfate of 0.5-1%, also some organic-inorganic impurity are weakly acidic.It needs further to purify.
Invention content
The purpose of this utility model provides a kind of amide reconditioner, can promote the quality of amide oil, mitigates follow-up
Process pressure extends the run time of extraction tower.
In order to solve the above technical problems, technical solution used by the utility model is：A kind of amide reconditioner, packet
Amide oil separating tank is included, top connects the first mixer, and the first mixer is also associated with amide oil-piping and aqueous slkali pipeline,
Amide oil separating tank is also associated with the second mixer, and the second mixer is connected with acid solution pipeline and removes extraction tower pipeline.
Further, which further includes alkali soluble liquid storage tank and acid solution storage tank, and alkali soluble liquid storage tank passes through aqueous slkali pipeline
The first mixer is connected, acid solution storage tank connects the second mixer by acid solution pipeline.
Further, which further includes crystallizer, and amide oil knockout drum bottom is connected by heavy phase recovery channel and crystallized
Device is also equipped with heavy phase pump on heavy phase recovery channel.
Further, amide oil pump is also equipped between amide oil separating tank and the second mixer.
Further, second mixer is equipped with pH detectors.
The utility model is by being arranged the first mixer and the second mixer, amide oil and aqueous slkali in the first mixer
It is mixed, amide oil is washed using aqueous slkali, is reacted with part organic acid, such as sulphonic acids, it is made to tend to dissolve into lower layer
In heavy phase solution, the heavy phase that multi_layer extraction contains high concentration impurities, obtained amide oil are then carried out in amide oil separating tank
Enter back into the second mixer be added acid solution adjust pH, readjustment to benzene extraction tower operation control environment after enter extraction tower into
Row extraction.So that the total quality of amide oil is improved, alleviate the pressure of follow-up refining step, extends benzene extraction tower
The cycle of operation.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Specific implementation mode
The utility model is further illustrated with reference to embodiment, but the range of the requires of the utility model protection not office
It is limited to the range of embodiment statement.
Embodiment 1：
A kind of amide reconditioner, including amide oil separating tank 1, top connect the first mixer 2, the first mixer
It is also associated with amide oil-piping 3 and aqueous slkali pipeline 4, amide oil separating tank 1 is also associated with the second mixer 5, the second mixer
It is connected with acid solution pipeline 6 and removes extraction tower pipeline 7.
In preferred scheme, which further includes alkali soluble liquid storage tank and acid solution storage tank, and alkali soluble liquid storage tank passes through aqueous slkali
Pipeline 4 connects the first mixer, and acid solution storage tank connects the second mixer by acid solution pipeline 6.
In preferred scheme, which further includes crystallizer, and 1 bottom of amide oil separating tank is connected by heavy phase recovery channel
Crystallizer is also equipped with heavy phase pump on heavy phase recovery channel.
In preferred scheme, amide oil pump is also equipped between amide oil separating tank 1 and the second mixer.
In preferred scheme, second mixer is equipped with pH detectors.
In specific purification process, amide oil to be clean enters the first mixer by amide oil-piping, and aqueous slkali is through alkali
Solution line 4 enters the first mixer, and amide oil is mixed with the aqueous slkali of 20--60%wt, and material enters amide oil after mixing
It is layered from tank, at least ensures 2 hours or more residence times, then upper layer amide oil is by amide oil pumped, into second
Mixer, inside it with after the acid solution Mixed adjustment pH4.5--6.0 of 10--98%wt enter extraction tower.Amide oil separating tank
In heavy phase pass through heavy phase pumping to crystallizer recycle.
By analyzing, delustring 32 in amide oil to be clean, coloration 3650, ammonium sulfate mass content 0.558%, and purify
Delustring 25 in amide oil afterwards, coloration 2710, ammonium sulphate content 0.383%, treated, and amide oil indices fall reaches
20--30%。
Claims (5)
1. a kind of amide reconditioner, it is characterised in that：Including amide oil separating tank（1）, top connects the first mixer
（2）, the first mixer is also associated with amide oil-piping（3）With aqueous slkali pipeline（4）, amide oil separating tank（1）It is also associated with
Two mixers（5）, the second mixer is connected with acid solution pipeline（6）With remove extraction tower pipeline（7）.
2. the apparatus according to claim 1, it is characterised in that：The device further includes alkali soluble liquid storage tank and acid solution storage tank,
Alkali soluble liquid storage tank passes through aqueous slkali pipeline（4）The first mixer is connected, acid solution storage tank passes through acid solution pipeline（6）Connection second
Mixer.
3. the apparatus according to claim 1, it is characterised in that：The device further includes crystallizer, amide oil separating tank（1）Bottom
Portion connects crystallizer by heavy phase recovery channel, and heavy phase pump is also equipped on heavy phase recovery channel.
4. the apparatus according to claim 1, it is characterised in that：Amide oil separating tank（1）Also pacify between the second mixer
Equipped with amide oil pump.
5. the apparatus according to claim 1, it is characterised in that：Second mixer is equipped with pH detectors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721746170.XU CN207775121U (en) | 2017-12-14 | 2017-12-14 | A kind of amide reconditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721746170.XU CN207775121U (en) | 2017-12-14 | 2017-12-14 | A kind of amide reconditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207775121U true CN207775121U (en) | 2018-08-28 |
Family
ID=63231456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721746170.XU Active CN207775121U (en) | 2017-12-14 | 2017-12-14 | A kind of amide reconditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207775121U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115253380A (en) * | 2022-08-19 | 2022-11-01 | 清元智能科技研究院(湖北)有限公司 | Caprolactam extraction system and method |
-
2017
- 2017-12-14 CN CN201721746170.XU patent/CN207775121U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115253380A (en) * | 2022-08-19 | 2022-11-01 | 清元智能科技研究院(湖北)有限公司 | Caprolactam extraction system and method |
| CN115253380B (en) * | 2022-08-19 | 2023-09-01 | 清元智能科技研究院(湖北)有限公司 | Caprolactam extraction system and method |
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