CN109053353A - Isobutene overlaps inhibitor removal of impurities recovery process method and its system and device - Google Patents
Isobutene overlaps inhibitor removal of impurities recovery process method and its system and device Download PDFInfo
- Publication number
- CN109053353A CN109053353A CN201810960751.6A CN201810960751A CN109053353A CN 109053353 A CN109053353 A CN 109053353A CN 201810960751 A CN201810960751 A CN 201810960751A CN 109053353 A CN109053353 A CN 109053353A
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- China
- Prior art keywords
- inhibitor
- isobutene
- column
- rectifying
- tower
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/005—Processes comprising at least two steps in series
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/04—Purification; Separation; Use of additives by distillation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/10—Purification; Separation; Use of additives by extraction, i.e. purification or separation of liquid hydrocarbons with the aid of liquids
Abstract
Present patent application provides a kind of isobutene overlapping inhibitor removal of impurities recovery process method and its system and devices.Isobutene overlapping inhibitor removal of impurities recovery process method is: washing extraction material is based on matter weight percent, containing the tert-butyl alcohol 5~20%, contain sec-butyl alcohol 3~10%, remaining is water, followed by two rectifying columns, first rectifying column is water separation column, Second distillation column is inhibitor recovery tower, and the number of plates is 50~70 pieces in two rectifying columns, and feed inlet is set at the 30th~35 block of column plate from top to bottom.While implementing inhibitor recycling, remove sec-butyl alcohol impurity and moisture content, inhibitor recycles purity and is greater than 85%, sec-butyl alcohol content no more than 0.4%, the cycling and reutilization of inhibitor meets normal, stable and safe handling the needs of isobutene heat bodied oil production after recycling, creates condition for heat bodied oil high quality of production.
Description
Technical field
Present patent application is related to inhibitor removal of impurities, high-purity after petrochemical industry more particularly to isobutene building-up reactions
The impurity removal process method and its system and device of recycling.
Background technique
The high-octane Diisobutylene of isobutene overlapping production is the disabled rear new use explored for isobutene of MTBE
On the way, new outlet.Since the resin catalyst activity applied in isobutene coincidence process is higher, need to add the tert-butyl alcohol to inhibit
Agent can maintain normal reaction, though the addition of inhibitor can improve reaction condition, also bring inhibitor and be difficult to back
The technical issues of new impurity effect building-up reactions can be introduced in receipts, particularly existing recovery process.Existing inhibitor recycling is adopted
The recovery process of rectifying again after being washed with water, particularly extraction tower washing separation, inhibitor aqueous solution are sent into rectifying column and are divided
From.The recovery method is primarily present two technical problems, first is that contain certain moisture content in the recycling inhibitor that rectifying column obtains,
The inhibitor recycles building-up reactions in use, the moisture content in inhibitor generates uncle with isobutene reaction under resin catalyst effect
Butanol can also react with n-butene and generate sec-butyl alcohol, cause sec-butyl alcohol in reaction system more and more to be accumulated, sec-butyl alcohol pair
Building-up reactions does not have inhibiting effect, but will lead to reaction overtemperature, and the heat bodied oil that excessively high reaction temperature will lead to output is done
It is exceeded；Second is that the inhibitor tert-butyl alcohol can decompose, also generating a part of moisture content leads to the generation of sec-butyl alcohol, so that it is anti-to influence overlapping
It answers.Therefore, inhibitor recycles, and the sec-butyl alcohol for removing regenerant has very important actual production meaning.
Summary of the invention
The goal of the invention of present patent application is that providing one kind effectively improves inhibitor recycling purity, makes isobutene overlapping life
It produces and eliminates impurity effect, operated steadily in the long term in the case where setting process conditions technical specification, guarantee that the isobutene of overlapping oil quality is folded
Close inhibitor removal of impurities recovery process method and its system and device.
The isobutene overlapping inhibitor that present patent application provides cleans recovery process method and technology scheme, in major technique
Rong Shi: a kind of isobutene overlapping inhibitor removal of impurities recovery process method, method is: washing inhibitor recovered material extracted
Followed by two rectifying columns, the number of plates of every rectifying column is 50~70 pieces, feed inlet be set in tower from top to bottom the 30th~
At 35 blocks of column plates, the service condition of first rectifying column is: normal pressure, 85~90 DEG C of tower top temperature, reflux ratio are 0.3~10 in tower,
The service condition of Second distillation column is: normal pressure, 75~82 DEG C of tower top temperature, reflux ratio are 1~10 in tower；Wherein, by matter weight
Percentages wash inhibitor recovered material component extracted are as follows: and the tert-butyl alcohol contains 3~10% containing 5~20%, sec-butyl alcohol, remaining
For water.
The present patent application also provide a kind of isobutyls for realizing above-mentioned isobutene overlapping inhibitor removal of impurities recovery process method
Alkene lamination system device, the inhibitor exhausting section system line composition after isobutene building-up reactions section includes inhibitor regenerant
Sequentially connected twice rectifying column after expects pipe line, the number of plates is 50~70 pieces in two rectifying columns, feed inlet be set to from up to
At lower 30th~35 block of column plate, washes inhibitor recovered material pipeline extracted and be connected to first rectifying column feed inlet, first
The top of the distillation column pipeline is connected to Second distillation column feed inlet through condenser, and Second distillation column overhead line is inhibitor recovery tube
Line, bottom are impurity and aqueous mixtures discharging pipeline.
In above-mentioned isobutene lamination system device, the column plate in the rectifying column is valve plate or sieve-plate tower
Plate.
Isobutene disclosed in present patent application overlaps inhibitor removal of impurities recovery process method and its system and device technical solution,
While implementing inhibitor recycling, inhibitor recycles purity and is greater than 85%, sec-butyl alcohol content no more than 0.4%, efficiently separates
Sec-butyl alcohol impurity therein and most moisture content out, the cycling and reutilization of inhibitor meets the production of isobutene heat bodied oil after recycling
Normal, stable and safe handling needs, solve the system cycle of operation long technical bottleneck, be heat bodied oil high quality of production
It creates condition.
Detailed description of the invention
Attached drawing is that the inhibitor exhausting section system line of the application system and device constitutes figure.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that the specific embodiment put on display is only used for
It is bright in order to understanding the present invention, rather than the feasible region that limitation is of the invention.
The isobutene lamination system device of present patent application, suppression including isobutene building-up reactions section system line and thereafter
Preparation removal of impurities exhausting section system line.Due to the technical characterstic of inhibitor exhausting section system line and present patent application --- inhibit
Agent removal of impurities recycling is closely related, and the conversion zone system line and its building-up reactions process with isobutene building-up reactions be not by office
Limit, so stressing inhibitor exhausting section system line and its removal of impurities recovery process method below.
Isobutene overlaps the isobutene lamination system device of inhibitor removal of impurities recovery process method, inhibitor removal of impurities recycling
Section system line composition is connected with twice rectifying column 2,6 in turn after the inhibitor recovered material pipeline including washing extraction tower, and two
The number of plates being arranged in the tower of rectifying column 2,6 is 50~70 pieces, and the feed inlet of two rectifying columns 2,6 is all set in from top to bottom the
At 30~35 blocks of column plates.The tert-butyl alcohol material pipeline for washing extraction tower is drivingly connected by plunger pump 1 to the charging of first rectifying column 2
Mouthful, 2 bottom of first rectifying column is water outlet pipeline, can return to and is connected to the water supply line of washing extraction tower, is discharged the reflux of pipeline
Reboiler 5 is set on pipeline, the overhead line of first rectifying column 2 is connected to 6 feed inlet of Second distillation column through condenser 3, and second
6 overhead line of rectifying column is inhibitor recycling discharging pipeline, can return to the recycling of inhibitor head tank, Second distillation column 6
Bottom is the discharging pipeline of sec-butyl alcohol and aqueous mixtures, is arranged on the reflux pipeline of impurity sec-butyl alcohol and aqueous mixtures pipeline and boils again
Device 9.
Column plate in two rectifying columns 2,6 is valve plate or sieve plate column plate.
The isobutene overlapping inhibitor realized by the isobutene lamination system device cleans recovery process method: by being
System line alignment, washes inhibitor recovered material extracted and successively handles through twice rectifying column, the operation item of first rectifying column 2
Part is: normal pressure, 85~90 DEG C of tower top temperature, reflux ratio are 0.3~10 in tower；Second distillation column 6 is inhibitor recovery tower, fortune
Row condition is: normal pressure, 75~82 DEG C of tower top temperature, reflux ratio are 1~10 in tower, best tower top temperature are as follows: 75~82 DEG C, are inhibited
Agent is discharged by tower top rectifying separation discharging, sec-butyl alcohol and aqueous mixtures by tower bottom；Wherein, described based on matter weight percent
Wash the component of inhibitor recovered material extracted are as follows: the tert-butyl alcohol contains 3~10% containing 5~20%, sec-butyl alcohol, remaining is water.
Following table gives by inhibitor recovered material after the system and device, different washing extractions through specific isobutene
Overlap the literature and art separating resulting tables of data of inhibitor removal of impurities recovery process method:
Claims (4)
- A kind of recovery process method 1. isobutene overlapping inhibitor cleans, which is characterized in that its method is: washing suppression extracted For preparation recovered material followed by two rectifying columns, the number of plates of every rectifying column is 50~70 pieces, feed inlet be set in tower by At lower 30th~35 block of column plate, the service condition of first rectifying column is: normal pressure, 85~90 DEG C of tower top temperature, reflux in tower Than being 0.3~10, the service condition of Second distillation column is: normal pressure, 75~82 DEG C of tower top temperature, reflux ratio are 1~10 in tower；Its In, based on matter weight percent, wash inhibitor recovered material component extracted are as follows: the tert-butyl alcohol contains 3 containing 5~20%, sec-butyl alcohol ~10%, remaining is water.
- The recovery process method 2. isobutene overlapping inhibitor according to claim 2 cleans, which is characterized in that the second rectifying 78~82 DEG C of the tower top temperature of tower.
- 3. it is a kind of realize claim 1 to 2 it is one of any described in isobutene overlapping inhibitor removal of impurities recovery process method it is different Butylene lamination system device, which is characterized in that the inhibitor exhausting section system line after isobutene building-up reactions section forms packet Including sequentially connected twice rectifying column (2,6) after inhibitor recovered material pipeline, two rectifying columns (2,6) interior number of plates is 50~ 70 pieces, feed inlet is set at the 30th~35 block of column plate from top to bottom, washes inhibitor recovered material pipeline connection extracted To first rectifying column feed inlet, first rectifying column (2) overhead line is connected to Second distillation column (6) feed inlet through condenser, the Two rectifying columns (6) overhead line is inhibitor recovery line, and bottom is impurity and aqueous mixtures discharging pipeline.
- 4. isobutene lamination system device according to claim 3, which is characterized in that the tower of the rectifying column (2,6) Plate is valve plate or sieve plate column plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810960751.6A CN109053353A (en) | 2018-08-22 | 2018-08-22 | Isobutene overlaps inhibitor removal of impurities recovery process method and its system and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810960751.6A CN109053353A (en) | 2018-08-22 | 2018-08-22 | Isobutene overlaps inhibitor removal of impurities recovery process method and its system and device |
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| Publication Number | Publication Date |
|---|---|
| CN109053353A true CN109053353A (en) | 2018-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810960751.6A Pending CN109053353A (en) | 2018-08-22 | 2018-08-22 | Isobutene overlaps inhibitor removal of impurities recovery process method and its system and device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040182691A1 (en) * | 2003-03-22 | 2004-09-23 | Oxeno Olefinchemie Gmbh | Process for removing 2-butanol from tert-butanol/water mixtures |
| CN1532176A (en) * | 2003-03-22 | 2004-09-29 | 奥克森诺奥勒芬化学股份有限公司 | Process for separating 2-bulanol from tertiary butanol/water mixtures |
| CN1532177A (en) * | 2003-03-22 | 2004-09-29 | �¿�ɭŵ���շһ�ѧ�ɷ�����˾ | Process for separating 2-butanol from tertiary butanol/ water mixture |
| RU2368593C1 (en) * | 2008-05-13 | 2009-09-27 | Открытое акционерное общество "Нижнекамскнефтехим" | Method of extracting isobutylene |
| CN103242119A (en) * | 2013-05-23 | 2013-08-14 | 南京工业大学 | Method for separating mixture of diisobutylene and tertiary butanol |
| CN107652152A (en) * | 2017-10-24 | 2018-02-02 | 丹东明珠特种树脂有限公司 | Isobutene building-up reactions process of preparing |
-
2018
- 2018-08-22 CN CN201810960751.6A patent/CN109053353A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040182691A1 (en) * | 2003-03-22 | 2004-09-23 | Oxeno Olefinchemie Gmbh | Process for removing 2-butanol from tert-butanol/water mixtures |
| CN1532178A (en) * | 2003-03-22 | 2004-09-29 | �¿�ɭŵ���շһ�ѧ�ɷ�����˾ | Process for separating 2-butanol from tertiary butanol/water mixture |
| CN1532176A (en) * | 2003-03-22 | 2004-09-29 | 奥克森诺奥勒芬化学股份有限公司 | Process for separating 2-bulanol from tertiary butanol/water mixtures |
| CN1532177A (en) * | 2003-03-22 | 2004-09-29 | �¿�ɭŵ���շһ�ѧ�ɷ�����˾ | Process for separating 2-butanol from tertiary butanol/ water mixture |
| RU2368593C1 (en) * | 2008-05-13 | 2009-09-27 | Открытое акционерное общество "Нижнекамскнефтехим" | Method of extracting isobutylene |
| CN103242119A (en) * | 2013-05-23 | 2013-08-14 | 南京工业大学 | Method for separating mixture of diisobutylene and tertiary butanol |
| CN107652152A (en) * | 2017-10-24 | 2018-02-02 | 丹东明珠特种树脂有限公司 | Isobutene building-up reactions process of preparing |
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