CN107540558A - A kind of DIPA preparation flows hydrolysis - Google Patents
A kind of DIPA preparation flows hydrolysis Download PDFInfo
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- CN107540558A CN107540558A CN201610477543.1A CN201610477543A CN107540558A CN 107540558 A CN107540558 A CN 107540558A CN 201610477543 A CN201610477543 A CN 201610477543A CN 107540558 A CN107540558 A CN 107540558A
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- dipa
- aniline
- aluminium
- hydrolysis
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Abstract
The present invention relates to chemical products production field, especially DIPA production fields.DIPA is a kind of important industrial chemicals.DIPA technological processes：Aniline and aluminium powder are added into alkylated reaction kettle, then it heated using conduction oil, as reaction temperature raises, aniline gradually dissolves, and is slowly reacted with aluminium powder, generates aniline aluminium.Terminate after temperature rises to about 285 DEG C, pressure rises to 3.2 3.8MPa, reaction lasts about 2h, emptied after the condensed cooling of hydrogen by the high aiutages of 20m；Propylene is passed through after emptying, in 310 DEG C, Stress control in 4.5MPa, aniline aluminium reacts with propylene lasts about 35h, generates 2,6 diisopropyl aniline aluminium for reaction temperature control；Hydrolysis kettle is transferred to after material cooling, adds soft water in hydrolysis kettle, hydrolysis occurs, ultimately generates DIPA crude products and aluminum hydroxide precipitation, treats next one-step refining.
Description
Technical field
The present invention relates to chemical products production field, especially DIPA production fields.
Background technology
DIPA is a kind of important industrial chemicals.
The content of the invention
Technological process
Aniline and aluminium powder are added into alkylated reaction kettle, then it heated using conduction oil, as reaction temperature raises,
Aniline gradually dissolves, and is slowly reacted with aluminium powder, generates aniline aluminium.Treat temperature rise to about 285 DEG C, pressure rise to 3.2-
3.8MPa, reaction terminate after lasting about 2h, are emptied after the condensed cooling of hydrogen by the high aiutages of 20m；Propylene is passed through after emptying,
In 310 DEG C, Stress control in 4.5MPa, aniline aluminium reacts with propylene lasts about 35h, generates 2,6- bis- for reaction temperature control
Isopropyl-aniline aluminium；Hydrolysis kettle is transferred to after material cooling, adds soft water in hydrolysis kettle, hydrolysis occurs, ultimately generates DIPA
Crude product and aluminum hydroxide precipitation, treat next one-step refining.
(2) DIPA product purifications
Material after hydrolysis enters phase-splitter, and after phase-splitter separates, organic phase is first temporary in coarse fodder temporary storage tank for aqueous phase and organic phase
Deposit；Aqueous phase and aluminium hydroxide are dehydrated into plate and frame filter press, and filtrate is returned hydrolysis kettle and recycled, and filter cake is aluminium mud.Coarse fodder is temporary
Deposit the coarse fodder in tower and continuously squeeze into dehydrating tower dehydration, dehydrating tower is heated using conduction oil, the water of overhead extraction and a small amount of thing
Recycled after expecting condensed device condensation from inflow hydrolysis kettle；The material of bottom of towe squeezes into lightness-removing column with pump.Lightness-removing column tower top is sloughed
The light component such as aniline, DIPA and o-isopropyl aniline enter dehydrogenation, de- weight recovery tower, the material of tower reactor squeezes into de- weight with pump
Tower.Weight-removing column overhead extraction finished product DIPA, the material of bottom of towe squeeze into dehydrogenation, de- weight recovery tower.Dehydrogenation, de- weight recovery tower material enter
After row rectifying, the light component of extraction is returned alkylated reaction kettle and recycled, and the heavy DIPA technological reactions equation of extraction is as follows：
Hydrolysis equation：
Side reaction
Claims (2)
1. the present invention relates to material composition and proportioning.
2. the present invention relates to technological process：Hydrolysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610477543.1A CN107540558A (en) | 2016-06-28 | 2016-06-28 | A kind of DIPA preparation flows hydrolysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610477543.1A CN107540558A (en) | 2016-06-28 | 2016-06-28 | A kind of DIPA preparation flows hydrolysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107540558A true CN107540558A (en) | 2018-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610477543.1A Pending CN107540558A (en) | 2016-06-28 | 2016-06-28 | A kind of DIPA preparation flows hydrolysis |
Country Status (1)
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| CN (1) | CN107540558A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116574012A (en) * | 2023-07-10 | 2023-08-11 | 山东海利尔化工有限公司 | Aromatic amine alkylation method |
-
2016
- 2016-06-28 CN CN201610477543.1A patent/CN107540558A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116574012A (en) * | 2023-07-10 | 2023-08-11 | 山东海利尔化工有限公司 | Aromatic amine alkylation method |
| CN116574012B (en) * | 2023-07-10 | 2023-09-12 | 山东海利尔化工有限公司 | Aromatic amine alkylation method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180105 |