CN106748758A - Heat pump partition wall reactive distillation column prepares the device of isopropyl acetate - Google Patents
Heat pump partition wall reactive distillation column prepares the device of isopropyl acetate Download PDFInfo
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- CN106748758A CN106748758A CN201611186127.2A CN201611186127A CN106748758A CN 106748758 A CN106748758 A CN 106748758A CN 201611186127 A CN201611186127 A CN 201611186127A CN 106748758 A CN106748758 A CN 106748758A
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/03—Preparation of carboxylic acid esters by reacting an ester group with a hydroxy group
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/007—Energy recuperation; Heat pumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/009—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in combination with chemical reactions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/141—Fractional distillation or use of a fractionation or rectification column where at least one distillation column contains at least one dividing wall
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
- B01D3/322—Reboiler specifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/42—Regulation; Control
- B01D3/4211—Regulation; Control of columns
- B01D3/4216—Head stream
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
- C07C67/52—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
- C07C67/54—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation
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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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- Crystallography & Structural Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses the device that heat pump partition wall reactive distillation column prepares isopropyl acetate, belong to technical field of rectification.The device is a kind of with methyl acetate and isopropanol as raw material, the heat pump partition wall reactive distillation column of ester-interchange method synthesis of acetic acid isopropyl ester, the technique realizes the production of the isopropyl acetate of high-purity in heat pump partition wall reactive distillation column, by the energy coupling of liquid phase stream stock in tower, the latent heat of overhead gas is made full use of, after compressor pressurization heats up, while giving the two tower bottom reboiler heat supplies of partition wall reactive distillation column, do not need external heat source to provide the energy of heat, significantly reduce energy consumption.Meanwhile, the multitower of traditional reactive distillation and later separation purifying technique is incorporated into a partition wall reactive distillation column, save equipment investment.
Description
Technical field
The invention belongs to technical field of rectification, it is related to the production method of ethyl ester isopropyl ester, specifically, is related to a kind of heat pump
Partition wall reactive distillation column prepares the device of isopropyl acetate.
Background technology
Isopropyl acetate is a kind of important carboxylic acid esters product, and it is widely used.It is the original of synthetic resin and coating
Material, it is also possible to as some perfume compositions, dehydrating agent, the solvent of coating, the solvent of printing-ink, and can be as extractant
It is applied in the technique of some pharmaceutical synthesis.Isopropyl acetate has the title of " alembroth ", can be organic with alcohol, ketone, ethers etc.
Solvent is miscible.
The production technology of current synthesis of acetic acid isopropyl ester mainly has three kinds, and a kind of method is exactly that acetic acid is former with isopropanol
Material, the direct esterification generation isopropyl acetate in the presence of strongly acidic catalyst, the method as disclosed in CN103214367, this
Method makees catalyst with the concentrated sulfuric acid, and because catalyst is easy to get, price is low, but its major defect be device it is perishable, easily pollution environment,
Product complicated difficult is separated, and the water for having equimolar quality after reaction is produced, and post processing flow is more long.Another method is to use acetic acid
Isopropyl acetate is directly synthesized with propylene, the method as disclosed in CN102757341.The method shortens reaction process, saves
The consumption of raw material, acid reacts with a molecule propylene with the acid that alkene direct esterification is a molecule, one molecule of generation
Isopropyl acetate, there is no remaining accessory substance to produce in reaction, but the technique there is also weak point, and alkene can occur in reaction
The oligomer accumulation of hydrocarbon, causes subsequent separation process difficult.
In polyvinyl alcohol production technology, the methyl acetate yield as accessory substance is very big.Often produce one ton of polyethylene
Alcohol about produces 1.68 tons of methyl acetate.Methyl acetate value is not high, it is therefore desirable to convert it into more valuable acid
Or ester.Methyl acetate hydrolysis energy consumption is higher, limits its application.If use instead with isopropanol ester-interchange method recovery of acetic acid methyl esters,
There is obvious advantage in production energy-conservation and economic benefit.CN104945251A proposes a kind of with methyl acetate and isopropanol as former
Material, the reactive distillation process of ester-interchange method synthesis of acetic acid isopropyl ester.
The value the esters higher although reactive distillation process of ester-interchange method synthesis of acetic acid isopropyl ester can be applied,
Its energy consumption higher also should have one of problems faced extensively in the industry as this method.Patent CN105017019 proposes one
Plant the energy saving technique for using reaction under high pressure rectifying column and normal pressure methyl acetate recovery tower be thermally integrated generation isopropyl acetate.
The content of the invention
The deficiency that the present invention exists for above-mentioned technology, proposes a kind of with methyl acetate and isopropanol as raw material, ester exchange
The heat pump partition wall reactive distillation column of method synthesis of acetic acid isopropyl ester, process set heat pump distillation and partition wall reactive distillation
Feature, product purity high advantage low with energy consumption.
It is that, up to this purpose, the present invention uses following technical scheme：
A kind of isopropyl acetate heat pump partition wall reactive distillation column, king-tower, overhead condenser with partition wall, tower reactor second
Isopropyl propionate reboiler, tower reactor methyl alcohol reboiler, are divided into Reaction Separation region inside king-tower, Methanol Recovery region and tower top are separated
Region.Reaction Separation region and Methanol Recovery region are located at the middle and lower part of rectifying column, and both are separated by vertical dividing plate,
Vertical dividing plate lower end is connected with rectifier bottoms, and upper end extends to tower top separated region lower section.
Tower top separated region top outwards connects steam pipe, and steam pipe is divided into two, a connection compressor, another company
Connect overhead condenser；The rectifying column in Reaction Separation region is externally connected to raw material isopropanol feed pipe and the charging of raw acetic acid methyl esters
Pipe, the bottom in Reaction Separation region is provided with discharge nozzle, and discharge nozzle is divided into two, and a connection isopropyl acetate reboiler is reconnected
Reaction Separation region, another extraction isopropyl acetate；The bottom in Methanol Recovery region is provided with discharge nozzle, and one point of discharge nozzle is
Two, a connection methyl alcohol reboiler reconnects Methanol Recovery region, another extraction methyl esters.
Reaction Separation region middle part filling catalysts, upper and lower part filling High Efficient Standard Packing or column plate, play rectifying
Centrifugation；Tower top separated region and the filling of Methanol Recovery region High Efficient Standard Packing or column plate, play rectifying centrifugation.
The method for preparing isopropyl acetate using above-mentioned heat pump partition wall reactive distillation column, is carried out as steps described below：It is different
The Reaction Separation region that propyl alcohol and methyl acetate respectively enter partition wall reactive distillation column contacts with catalyst and carries out Reaction Separation,
The vapour mixture of methyl alcohol and methyl acetate is flowed out by tower top separated region, and vapour mixture is divided into two strands, and one is through compressor
Boiling hot amount again is provided to Reaction Separation sections bottom after compression, then boiling hot amount, Ran Houjing again are provided to Methanol Recovery region bottom
Mix with another strand of vapour mixture after crossing choke valve, condensed in rear portion reflux column by overhead condenser, another part
Mix with raw acetic acid methyl esters and return to Reaction Separation section.The isopropyl acetate of target product high-purity is by Reaction Separation region
Bottom is produced, and methyl alcohol is produced by Methanol Recovery region bottom.
Described catalyst is solid acid catalyst, can be Amberlyst-15, Amberlyst-35, Amberlyst-46
Deng storng-acid cation exchange resin.
Heat pump partition wall reactive distillation column operating pressure is 100~600kPa, and tower top separated region tower top operation temperature is
50~80 DEG C, number of theoretical plate is 5~15 pieces, and Reaction Separation sections bottom temperature is 90~150 DEG C, wherein 9~12 pieces of rectifying section
Plate, 40~60 blocks of plates of conversion zone, conversion zone loads solid catalyst, 10~15 blocks of plates of stripping section.Methanol Recovery region operation temperature
It is 64~72 DEG C to spend, and number of theoretical plate is 5~15 pieces.
Comprise the following steps that：
Isopropanol and methyl acetate respectively enter the Reaction Separation region of heat pump partition wall reactive distillation column, high boiling anti-
Answer thing isopropanol from Reaction Separation area top charging, lower boiling methyl acetate and the methyl acetate returned from overhead condenser
Mix with carbinol mixture, from the charging of Reaction Separation region bottom, two raw materials are under solid catalyst effect in Reaction Separation area
There is ester exchange reaction in domain, generate target product isopropyl acetate and by-product carbinol, wherein target product isopropyl acetate warp
After Reaction Separation region further separates, from the extraction of Reaction Separation sections bottom.Other components enter one into tower top separated region
Step is separated, and the methyl alcohol and the vapour mixture of methyl acetate obtained at the top of tower top separated region are divided into two strands, and one is compressed
Machine compression enters isopropyl acetate reboiler with Reaction Separation sections bottom logistics heat exchange after improving pressure and temp, there is provided boiling hot again
Amount, subsequently into methyl alcohol reboiler and the heat exchange of Methanol Recovery region bottoms, then by mixed with another burst of vapour phase after choke valve
Compound mixes, and tower top separated region is back to by condensing rear portion, and another part mixes with raw acetic acid methyl esters and returns again
Go back to Reaction Separation region.In the Methanol Recovery region of heat pump partition wall reactive distillation column, methyl alcohol and unreacted methyl acetate divide
It is a part of from Methanol Recovery region bottom obtains the methyl alcohol of high-purity from entering.Whole process overhead vapours passes through compressor and second
Isopropyl propionate reboiler and methyl alcohol reboiler complete the coupling of heat, and the technique no longer needs the extraneous hot public work of offer,
Save energy.
Relative to prior art, effect of the invention is that：High-purity is realized in heat pump partition wall reactive distillation column
The production of isopropyl acetate, by the energy coupling of liquid phase stream stock in tower, makes full use of the latent heat of overhead gas, through overcompression
After machine pressurization heats up, while giving the two tower bottom reboiler heat supplies of partition wall reactive distillation column, it is not necessary to which external heat source provides heat
Energy, significantly reduces energy consumption.Meanwhile, the multitower of traditional reactive distillation and later separation purifying technique is incorporated into one
In partition wall reactive distillation column, equipment investment is saved.
Brief description of the drawings
Fig. 1 is heat pump partition wall reactive distillation column apparatus structure of the invention and technological process.
Label is as follows in figure：1- partition wall reactive distillation columns, 2- tower top separated regions, 3- isopropyl acetates recovery area
Domain, 4- Methanol Recoveries region, 5- isopropyl acetate reboilers, 6- methyl alcohol reboilers, 7- overhead condensers, 8- compressors,
9- choke valves, 10- raw material isopropanol feed pipes, 11- raw acetic acid methyl esters feed pipes, 12- partition wall reactive distillation column towers
Top steam pipe, 13- compressor vapour phase feed pipes, 14- isopropyl acetate reboiler steam feed pipes, the discharging of 15- choke valves
Pipe, 16- overhead condenser feed pipes, 17- overhead reflux pipes, 18- partition wall reactive distillation column overhead extraction circulation pipes,
19- isopropyl acetates recovery zone bottom extraction pipe, the extraction of 20- Methanol Recoveries region tower reactor.
Specific embodiment
Detailed narration is carried out to specific embodiment of the invention below in conjunction with accompanying drawing：
As shown in Figure 1：Isopropyl acetate heat pump partition wall reactive distillation column of the invention includes the king-tower with partition wall
1st, overhead condenser 7, isopropyl acetate reboiler 6, methyl alcohol reboiler 5 are divided into tower top separated region 2, reaction point inside king-tower
From region 3 and Methanol Recovery region 4.Reaction Separation region 3 and Methanol Recovery region 4 are located at the middle and lower part of rectifying column, Liang Zhetong
Cross vertical dividing plate to separate, vertical dividing plate lower end is connected with tower bottom of rectifying tower, and upper end is extended under tower top separated region 2
Side.
The top of tower top separated region 2 outwards connects steam pipe, and steam pipe is divided into two, a connection compressor 8, Ling Yigen
Connection overhead condenser 7；The rectifying column in Reaction Separation region 3 is externally connected to raw material isopropanol feed pipe and raw acetic acid methyl esters
Feed pipe, the bottom in Reaction Separation region 3 is provided with discharge nozzle, and discharge nozzle is divided into two, a bottom of coupled reaction separated region 3
Isopropyl acetate reboiler 5 reconnect Reaction Separation region, another extraction isopropyl acetate；The bottom in Methanol Recovery region 4
Portion is provided with discharge nozzle, and discharge nozzle is divided into two, and the methyl alcohol reboiler 6 of a connection Methanol Recovery region 4 bottom reconnects methyl alcohol
Recovery zone, another extraction methyl esters.
Reaction Separation region II middle part filling catalysts, upper and lower part filling High Efficient Standard Packing or column plate, play essence
Evaporate centrifugation；Tower top separated region 2 and the filling of Methanol Recovery region 4 High Efficient Standard Packing or column plate, play rectifying and separate and make
With.
The technological process that heat pump partition wall reactive distillation column of the present invention prepares isopropyl acetate is：Raw material isopropyl
Alcohol and methyl acetate respectively enter the Reaction Separation region 3 of heat pump partition wall reactive distillation column RDWC, and high boiling reactant is different
Methyl acetate and first that propyl alcohol is returned from the charging of the top of Reaction Separation region 3, lower boiling methyl acetate and from overhead condenser 7
Alcohol mixture mixes, and from the charging of the bottom of Reaction Separation region 3, two raw materials are under solid catalyst effect in Reaction Separation region 3
Generation ester exchange reaction, generates target product isopropyl acetate and by-product carbinol, and wherein target product isopropyl acetate is through anti-
After answering separated region 3 further to separate, from the extraction of Reaction Separation region tower bottom.Other components are entered into tower top separated region 2
One step is separated, and the methyl alcohol and the vapour mixture of methyl acetate obtained from the top of tower top separated region 2 are divided into two strands, a stock-traders' know-how pressure
Contracting machine 8 is compressed, and isopropyl acetate reboiler 5 and the heat exchange of Reaction Separation region II bottoms are entered after improving pressure and temp, is
Reaction Separation region II provides boiling hot amount again, enters back into methyl alcohol reboiler 6 and the heat exchange of the bottoms of Methanol Recovery region 4, is first
Alcohol recovery zone 4 provides again boiling hot amount, then mixes with another strand of vapour mixture by choke valve 9, by overhead condenser 7
Condensation rear portion backflow tower top separated region 2, another part mixes with raw acetic acid methyl esters and returns to Reaction Separation region
3.In the Methanol Recovery region 4 of heat pump partition wall reactive distillation column 1, methyl alcohol enters a part from first with unreacted methyl acetate
The bottom of alcohol recovery zone III produces the methyl alcohol of high-purity.
Embodiment 1
Using the technological process shown in accompanying drawing 1, the heat pump partition wall reactive distillation column 1 for being used is diameter 800mm, 45 meters
Packed tower, 5 meters of the built-in structured packing of tower top separated region 2, number of theoretical plate be 10 pieces；Reaction Separation region 3 is built-in regular to be filled out
35 meters of material, number of theoretical plate is 74 pieces, wherein 9 blocks of plates of rectifying section, 43 blocks of plates of conversion zone, and conversion zone loads solid catalyst, used
Catalyst is Amberlyst-15 storng-acid cation exchange resins, 12 blocks of plates of stripping section.Built-in rule are set in Methanol Recovery region 4
5 meters of whole filler, the operating pressure of heat pump partition wall reactive distillation column 1 is 1atm, and the head temperature of tower top separated region 2 is 54 DEG C, instead
It is 91 DEG C to answer the bottom temp of separated region 3, and the bottom temp of Methanol Recovery region 4 is 65 DEG C.
Raw material isopropanol with 300kg/h from the top of Reaction Separation region 3 feed, lower boiling methyl acetate 370kg/h and
The methyl acetate returned from 2 overhead condenser of tower top separated region 7 mixes with carbinol mixture 369kg/h, from Reaction Separation area
The bottom of domain 3 feeds, and two raw materials occur under the effect of Amberlyst-15 storng-acid cation exchange resins in Reaction Separation region 3
Ester exchange reaction, generates target product isopropyl acetate and by-product carbinol, wherein reacted point of target product isopropyl acetate
After further being separated from region 3, from the extraction of the bottom of Reaction Separation region 3, the isopropyl acetate that mass fraction is 99.7% is obtained
510kg/h.Other components enter tower top separated region 2 and further separate, the methyl alcohol and second obtained from the tower top of tower top separated region 2
The vapour mixture of sour methyl esters is divided into two strands, and one compresses through compressor 8, is boiled again into isopropyl acetate after improving pressure and temp
Device 5 and the heat exchange of the bottoms of Reaction Separation region 3, are that Reaction Separation region 3 provides again boiling hot amount, enter back into methyl alcohol reboiler 6
With the bottoms of Methanol Recovery region 4 heat exchange, be that Methanol Recovery region 4 provides again boiling hot amount, then by choke valve 9 with it is another
Stock vapour mixture mixing, rear portion backflow tower top separated region 2, another part and raw material are condensed by overhead condenser E3
Methyl acetate mixing returns to Reaction Separation region 3.In the Methanol Recovery region 4 of heat pump partition wall reactive distillation column 1, methyl alcohol
Enter a part from the bottom of Methanol Recovery region 4 extraction mass fraction is 99.5% methyl alcohol with unreacted methyl acetate
161kg/h, the energy consumption of compressor 8 is 88kW, and the energy consumption of overhead condenser 7 is -72kW, the bottom isopropyl acetate of Reaction Separation region 3
Reboiler and the bottom methyl alcohol reboiler of Methanol Recovery region 4 do not need additional thermal technology's recruitment journey.
Embodiment 2
Using the technological process shown in accompanying drawing 1, the heat pump partition wall reactive distillation column 1 for being used is diameter 800mm, high by 50
10 pieces of column plate is set in the packed tower of rice, tower top separated region 2；The number of plates is 76 pieces, wherein rectifying section 10 in Reaction Separation region 3
Block plate, 44 blocks of plates of conversion zone, conversion zone loads solid catalyst, and used catalyst is handed over for Amberlyst-15 highly acidic cations
Change resin, 12 blocks of plates of stripping section.6 pieces of column plate is set in Methanol Recovery region 4, the operating pressure of heat pump partition wall reactive distillation column 1 is
2atm, the head temperature of tower top separated region 2 is 73 DEG C, and the bottom temp of Reaction Separation region 3 is 113 DEG C, the bottom of Methanol Recovery region 4
Portion's temperature is 83 DEG C of
Raw material isopropanol with 300kg/h from the top of Reaction Separation region 3 feed, lower boiling methyl acetate 370kg/h and
The methyl acetate returned from 2 overhead condenser of tower top separated region 7 mixes with carbinol mixture 352kg/h, from Reaction Separation area
The bottom of domain 3 feeds, and two raw materials occur under the effect of Amberlyst-15 storng-acid cation exchange resins in Reaction Separation region 3
Ester exchange reaction, generates target product isopropyl acetate and by-product carbinol, the wherein reacted separation of heavy component isopropyl acetate
After region 3 further separates, from the extraction of the bottom of Reaction Separation region 3, the isopropyl acetate that mass fraction is 99.6% is obtained
510kg/h.Other components enter tower top separated region 2 and further separate, the methyl alcohol and second obtained from the top of tower top separated region 2
The vapour mixture of sour methyl esters is divided into two strands, and one compresses through compressor 8, is boiled again into isopropyl acetate after improving pressure and temp
Device 5 and the heat exchange of the bottoms of Reaction Separation region 3, are that Reaction Separation region 3 provides again boiling hot amount, enter back into methyl alcohol reboiler 6
With the bottoms of Methanol Recovery region III heat exchange, be that Methanol Recovery region 4 provides again boiling hot amount, then by choke valve 9 with it is another
One vapour mixture mixes, and rear portion backflow tower top separated region 2, another part and original are condensed by overhead condenser 7
Material methyl acetate mixing returns to Reaction Separation region 3.In the Methanol Recovery region 4 of heat pump partition wall reactive distillation column 1, first
Alcohol enters a part from the bottom of Methanol Recovery region 4 extraction mass fraction is 99.5% methyl alcohol with unreacted methyl acetate
161kg/h, the energy consumption of compressor 8 is 112kW, and the energy consumption of overhead condenser 7 is -86kW, the bottom isopropyl acetate of Reaction Separation region 3
Reboiler and the bottom methyl alcohol reboiler of Methanol Recovery region 4 do not need additional thermal technology's recruitment journey.
Claims (3)
1. a kind of isopropyl acetate heat pump partition wall reactive distillation column, it is characterised in that king-tower, overhead condensation with partition wall
Device, tower reactor isopropyl acetate reboiler, tower reactor methyl alcohol reboiler, is divided into Reaction Separation region, Methanol Recovery region inside king-tower
With tower top separated region；Reaction Separation region and Methanol Recovery region are located at the middle and lower part of rectifying column, both by it is vertical every
Plate is separated, and vertical dividing plate lower end is connected with rectifier bottoms, and upper end extends to tower top separated region lower section.
2. a kind of isopropyl acetate heat pump partition wall reactive distillation column according to claim 1, it is characterised in that tower top point
Steam pipe is outwards connected from region top, steam pipe is divided into two, a connection compressor, another connection overhead condenser；
The rectifying column in Reaction Separation region is externally connected to raw material isopropanol feed pipe and raw acetic acid methyl esters feed pipe, Reaction Separation area
The bottom in domain is provided with discharge nozzle, and discharge nozzle is divided into two, and a connection isopropyl acetate reboiler reconnects Reaction Separation region,
Another extraction isopropyl acetate；The bottom in Methanol Recovery region is provided with discharge nozzle, and discharge nozzle is divided into two, a connection methyl alcohol
Reboiler reconnects Methanol Recovery region, another extraction methyl esters.
3. a kind of isopropyl acetate heat pump partition wall reactive distillation column according to claim 1, it is characterised in that reaction point
From region middle part filling catalysts, upper and lower part filling High Efficient Standard Packing or column plate play rectifying centrifugation；Tower top
Separated region and the filling of Methanol Recovery region High Efficient Standard Packing or column plate, play rectifying centrifugation.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107137949A (en) * | 2017-07-11 | 2017-09-08 | 河北工业大学 | A kind of extracting rectifying partitioned column device and method of low concentration aqueous isopropanol dehydration |
| CN110709149A (en) * | 2017-07-25 | 2020-01-17 | 阿科玛法国公司 | Method for purifying (meth) acrylic esters |
| CN109675332A (en) * | 2017-10-19 | 2019-04-26 | 中国石化工程建设有限公司 | Heat pump driven toluene tower fractionating device and method |
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