CN108976102A - Isobutene overlaps inhibitor recovery method and its system and device - Google Patents
Isobutene overlaps inhibitor recovery method and its system and device Download PDFInfo
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- CN108976102A CN108976102A CN201810960708.XA CN201810960708A CN108976102A CN 108976102 A CN108976102 A CN 108976102A CN 201810960708 A CN201810960708 A CN 201810960708A CN 108976102 A CN108976102 A CN 108976102A
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- tower
- isobutene
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- catalytic distillation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/80—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
- C07C2/02—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons
- C07C2/04—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons by oligomerisation of well-defined unsaturated hydrocarbons without ring formation
- C07C2/06—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons by oligomerisation of well-defined unsaturated hydrocarbons without ring formation of alkenes, i.e. acyclic hydrocarbons having only one carbon-to-carbon double bond
- C07C2/08—Catalytic processes
- C07C2/26—Catalytic processes with hydrides or organic compounds
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2531/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- C07C2531/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- C07C2531/06—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing polymers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Present patent application provides a kind of isobutene overlapping inhibitor recovery method and its system and devices.The described isobutene overlapping inhibitor recovery method is to connect catalytic distillation tower after isobutene superposition reactor, inhibitor recycling and reusing is realized by the side extraction line of 10~12 column plates under catalytic distillation tower feed inlet, or increasing rectifying column after catalytic distillation tower is inhibitor recovery tower, completes inhibitor recycling.The technical program simplifies inhibitor recovery process processing method and system line construction, energy consumption is greatly lowered, the technical issues of existing inhibitor recovery technology means are also introduced into new impurity while recycling is also avoided, inhibitor High efficiency recovery purpose is realized.
Description
Technical field
Present patent application be related to inhibitor recovery method in petrochemical industry more particularly to isobutene building-up reactions and
Its system and device.
Background technique
Isobutene overlapping produces high-octane Diisobutylene, is the disabled new outlet of isobutene afterwards of MTBE, new
Purposes.In isobutene coincidence process, since resin catalyst activity is higher, needing to add the tert-butyl alcohol can be just as inhibitor
Paradoxical reaction.Though the addition of inhibitor can improve reaction condition, inhibitor is also brought simultaneously and is difficult to the technical issues of recycling.
Inhibitor recovery technology generallys use the recovery process of rectifying again after washing at present, i.e., in extraction tower washing separation, inhibits
Agent aqueous solution is sent into rectifying column and isolates moisture content again.This washing separation absorption method, process flow is long, and presses down during separation
Preparation azeotrope with water is generated to the harmful impurity sec-butyl alcohol of building-up reactions；In addition, water vapor latent heat is bigger, there is consumption in distillation
The technical problem that energy is big, energy consumption is high.
Summary of the invention
The goal of the invention of present patent application is to simplify the inhibitor recovery process of isobutene coincidence process, reduces recycling energy
Consumption provides a kind of isobutene overlapping inhibitor recovery method and its system and device.
The isobutene that present patent application provides overlaps inhibitor recovery method technical solution, and main technical content is: one
Kind isobutene overlaps inhibitor recovery method, and method is: isobutene building-up reactions product introduces catalysis by feed inlet in the middle part of tower
Destilling tower, the tower top temperature of catalytic distillation tower is 60~80 DEG C, tower top pressure is 0.6~0.8MPa, tower reflux ratio be 0.5~
2.0, side extraction line is led to the inhibitor supply pipe of isobutene superposition reactor by 10~12 column plates under feed inlet
Line, by mass percentage, side extract 0.05~0.2% that line extracted amount is fresh feed amount out.
The present patent application also provide a kind of isobutene overlapping systems for realizing above-mentioned isobutene overlapping inhibitor recovery method
Bulk cargo is set, and system composition includes the system line of isobutene superposition reactor and catalytic distillation tower, isobutene superposition reactor
Carbon four raw material and inhibitor feeding line, bottom outlet of the top connection containing isobutene are connected to charging in the middle part of catalytic distillation tower
Mouthful, it is equipped with side at 10~12 blocks of column plates under feed inlet and extracts line out, the side extraction line is connected to isobutene building-up reactions
On the feeding line of device.
Another isobutene that present patent application provides overlaps inhibitor recovery method technical solution, main technical content
Be: a kind of isobutene overlapping inhibitor recovery method, method is: isobutene building-up reactions product is introduced by feed inlet in the middle part of tower
Catalytic distillation tower, inhibited dose of recovery tower recycles inhibitor to materials at bottom of tower again, and the tower top temperature 60 of the catalytic distillation tower~
80 DEG C, 0.6~0.8MPa of tower top pressure, tower reflux ratio 0.5~2.0；The inhibitor recovery tower be rectifying column, in normal pressure,
Tower top temperature is 78~84 DEG C, reflux ratio 0.3~5 is run, and recycles inhibitor, output heat bodied oil finished product.
The present patent application also provide a kind of isobutene overlapping systems for realizing above-mentioned isobutene overlapping inhibitor recovery method
Bulk cargo is set, and the main technical content of this isobutene lamination system device technique scheme is: a kind of isobutene lamination system device, by
Upstream to down-stream system route includes that four head tank of carbon, inhibitor head tank, superposition reactor, catalytic distillation tower and inhibitor return
Tower, the cooling rear portion discharging of catalytic distillation tower tower top material, a part reflux are received, tower reactor output expects pipe line is connected to inhibitor
Feed inlet in the middle part of recovery tower, the inhibitor recovery tower are rectifying column, and tower top inhibitor recovery line connects condenser, one
Point reflux, remaining for inhibitor discharge, heat bodied oil by tower bottom discharging pipeline discharging.
Isobutene disclosed in present patent application overlaps inhibitor recovery method and its system and device technical solution, by inhibitor
After recycling is in conjunction with isobutene building-up reactions organic linking, inhibitor recovery process processing method and system route is enormously simplified
Structure, and its process conditions is mild, is easily achieved and controls, energy consumption is greatly lowered, especially in integrated artistic processing again without
The participation of water avoids the technical issues of existing inhibitor recovery technology means are also introduced into new impurity while recycling, real
Inhibitor High efficiency recovery purpose is showed, side line inhibits to squeeze absorption method, and inhibitor, which contains, in heat bodied oil finished product is lower than 0.3%, inhibits
The recovery process method of agent recovery tower, inhibitor, which contains, in heat bodied oil finished product is far below 0.1%.The technical program also has isobutene
The technological merit that total conversion is high, Diisobutylene selectivity is high, isobutene total conversion reach 95% or more, dimerization isobutyl
The selective overall selectivity of alkene reaches 95% or more, and the overall recovery of inhibitor has reached 99%.
Detailed description of the invention
Fig. 1 and Fig. 2 is respectively two isobutene lamination system formation picture of device of present patent application.
Specific embodiment
Present invention will be further explained below with reference to specific examples technology contents.It should be understood that following embodiment is only used
In illustrating the technology of the present invention content, and cannot be used for limiting technical protection scope of the invention.
Embodiment 1
The isobutene lamination system device for realizing isobutene overlapping inhibitor recovery method, by the system line group of upstream to downstream
At, including four head tank 1 of carbon, inhibitor head tank 3, isobutene superposition reactor 5 and catalytic distillation tower 6, in this implementation system
In device, the isobutene superposition reactor 5 is fixed reaction bed.Carbon four and inhibitor containing isobutene are respectively from head tank
1,35 top feed mouth of isobutene superposition reactor is pumped by feeding line by metering pump 2,4, bottom outlet, which is connected to, urges
Change 6 middle part feed inlet of destilling tower.The catalytic distillation tower 6, the number of plates are preferably 60-70 block, feed inlet be located at by up to
Under 30-35 block column plate at, under the feed inlet of catalytic distillation tower 6 at 10-12 block column plate be equipped with side extract out line, the side extraction
Line is connected on the feedstock pipeline of superposition reactor 5, is inhibitor recycling and reusing recovery line.Wherein, isobutene is folded
It closes and resin catalyst is housed in reactor 5 and catalytic distillation tower 6.It is with isobutene superposition reactor 5 in the embodiment of following table
Catalyst charge is 40ml, the catalyst charge in catalytic distillation tower 6 is what 100ml made.
Table 1 lists catalytic distillation tower 6 four specific implementation reaction examples and the building-up reactions of isobutene superposition reactor 5 is transported
The inhibitor rate of recovery result data of row process conditions combination.
Wherein, present patent application scheme does not limit the building-up reactions condition of isobutene superposition reactor 5, has enumerated in table 1
Building-up reactions embodiment, be with as a result evidence illustrates the technical effect of the application, should not be construed as the application be in table
The building-up reactions method enumerated mutually limits.This isobutene overlaps inhibitor recovery method can be with existing isobutene building-up reactions side
Method is combined, and also achieves same ideal technical effect
Table 1
Embodiment 2
Another isobutene lamination system device for realizing isobutene overlapping inhibitor recovery method, by the system line of upstream to downstream
Road composition, including four head tank 1 of carbon, inhibitor head tank 3, isobutene building-up reactions reactor 5, catalytic distillation tower 6 and inhibition
Agent recovery tower 13.
In this implementation system and device, the isobutene superposition reactor 5 is fixed reaction bed；The catalytic distillation tower
6, the number of plates is preferably 60-70 block, and gating location is at 30-35 block column plate from top to bottom；The inhibitor returns
Receipts tower 13 is rectifying column, and the number of plates of inhibitor recovery tower 13 is preferably 50-60 block.
Four raw material of carbon and inhibitor containing isobutene respectively by head tank 1,3 through metering pump 2,4 from isobutene building-up reactions
5 top feed pipeline of device is pumped into, and 5 bottom outlet of isobutene superposition reactor is connected to 6 feed inlet of catalytic distillation tower, catalysis
6 tower top material of destilling tower condenses rear portion discharging, a part reflux, and tower reactor output expects pipe line is connected to inhibitor recovery tower 13
Middle part feed inlet, the inhibitor recycling discharging pipeline of 13 tower top of inhibitor recovery tower, after condensation, a part reflux, a part are returned
It is back to inhibitor head tank 3, tower bottom is heat bodied oil discharging pipeline.
Wherein, resin catalyst is housed in isobutene superposition reactor 5 and catalytic distillation tower 6.In the embodiment of the following table 2,
Being with the catalyst charge of isobutene superposition reactor 5 is 40ml, the catalyst charge in catalytic distillation tower 6 is 100ml
It makes.
Table 2 lists catalytic distillation tower 6,13 4 specific implementation reaction examples of inhibitor recovery tower and isobutene building-up reactions
The result data of the building-up reactions operation process conditional combination of device 5.Wherein, it is anti-not limit isobutene overlapping for present patent application scheme
The building-up reactions condition of device 5 is answered, has enumerated building-up reactions embodiment in table 2, is as a result evidence illustrates the skill of the application
Art effect, should not be construed as the application is mutually limited with the building-up reactions method enumerated in table.This isobutene overlaps inhibitor and returns
Receiving method can be combined with existing isobutene building-up reactions method, also achieve same ideal technical effect.
Table 2
The reaction condition of inhibitor recovery tower 13 is: normal pressure, tower top temperature are 78~84 DEG C, reflux ratio 0.3~5, rectifying recycling
Inhibitor, wherein tower top temperature, which is 82~84 DEG C, has the more preferably inhibitor rate of recovery.
Claims (7)
1. a kind of isobutene overlaps inhibitor recovery method, which is characterized in that its method is: isobutene building-up reactions product is by tower
Middle part feed inlet introduces catalytic distillation tower, the tower top temperature of catalytic distillation tower is 60~80 DEG C, tower top pressure be 0.6~
0.8MPa, tower reflux ratio are 0.5~2.0, and side extraction line leads to isobutene by 10~12 column plates under feed inlet and folds
Close reactor inhibitor supply line, by mass percentage, side extract out line extracted amount be fresh feed amount 0.05~
0.2%。
2. a kind of isobutene lamination system device for realizing isobutene overlapping inhibitor recovery method described in claim 1,
It is characterized in that, this its system composition includes the system line of isobutene superposition reactor (5) and catalytic distillation tower (6), isobutene
Carbon four raw material and inhibitor feeding line, bottom outlet of the connection containing isobutene are connected to catalysis at the top of superposition reactor (5)
Feed inlet in the middle part of destilling tower (6) is equipped with side at 10~12 blocks of column plates under feed inlet and extracts line, the side extraction line connection out
To the feeding line of isobutene superposition reactor.
3. isobutene lamination system device according to claim 2, which is characterized in that the catalytic distillation tower (6)
The number of plates is 60-70 block, and gating location is at the 30th~35 block of column plate from top to bottom.
4. a kind of isobutene overlaps inhibitor recovery method, which is characterized in that its method is: isobutene building-up reactions product is by tower
Middle part feed inlet introduces catalytic distillation tower, and inhibited dose of recovery tower recycles inhibitor, the catalytic distillation tower to materials at bottom of tower again
60~80 DEG C of tower top temperature, 0.6~0.8MPa of tower top pressure, tower reflux ratio 0.5~2.0；The inhibitor recovery tower is
Rectifying column, in normal pressure, tower top temperature are 78~84 DEG C, reflux ratio 0.3~5 is run, recycling inhibitor, output heat bodied oil finished product.
5. isobutene according to claim 4 overlaps inhibitor recovery method, which is characterized in that the tower top temperature of rectifying column
It is 82~84 DEG C.
6. a kind of isobutene lamination system dress for the isobutene overlapping inhibitor recovery method for realizing that claim 4-5 is one of any
It sets, which is characterized in that by upstream to down-stream system route include four head tank of carbon (1), inhibitor head tank (3), building-up reactions
Device (5), catalytic distillation tower (6) and inhibitor recovery tower (13), the cooling rear portion discharging of catalytic distillation tower (6) tower top material,
A part reflux, tower reactor output expects pipe line are connected to feed inlet in the middle part of inhibitor recovery tower (13), the inhibitor recovery tower
For rectifying column (13), tower top inhibitor recovery line connects condenser, and a part flows back, remaining is inhibitor discharging, heat bodied oil
By tower bottom discharging pipeline discharging.
7. isobutene lamination system device according to claim 6, which is characterized in that the column plate of inhibitor recovery tower (13)
Number is 50~60 pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810960708.XA CN108976102A (en) | 2018-08-22 | 2018-08-22 | Isobutene overlaps inhibitor recovery method and its system and device |
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| CN201810960708.XA CN108976102A (en) | 2018-08-22 | 2018-08-22 | Isobutene overlaps inhibitor recovery method and its system and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109354567A (en) * | 2018-12-13 | 2019-02-19 | 丹东明珠特种树脂有限公司 | The isobutene lamination system device and coincidence process method converted by methyl tertiary butyl ether(MTBE) plant modification |
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2018
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Patent Citations (4)
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| CN1410403A (en) * | 2001-09-26 | 2003-04-16 | 中国石化集团齐鲁石油化工公司 | Method of producing diisobutylene using mixed C4 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109354567A (en) * | 2018-12-13 | 2019-02-19 | 丹东明珠特种树脂有限公司 | The isobutene lamination system device and coincidence process method converted by methyl tertiary butyl ether(MTBE) plant modification |
| CN109354567B (en) * | 2018-12-13 | 2023-11-10 | 丹东明珠特种树脂有限公司 | Superposition process method of isobutene superposition system device reconstructed by methyl tertiary butyl ether device |
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Application publication date: 20181211 |