CN208586226U - A kind of microwave fixed-bed catalytic esterification system - Google Patents
A kind of microwave fixed-bed catalytic esterification system Download PDFInfo
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- CN208586226U CN208586226U CN201820994772.5U CN201820994772U CN208586226U CN 208586226 U CN208586226 U CN 208586226U CN 201820994772 U CN201820994772 U CN 201820994772U CN 208586226 U CN208586226 U CN 208586226U
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Abstract
The utility model belongs to chemical reaction device field more particularly to a kind of microwave fixed-bed catalytic esterification system.The system comprises the raw material storage device, heating device and the catalyst reaction devices that are connected to by pipeline；The raw material storage device includes oily phase head tank and Aqueous Phase Raw Material tank, oily phase, Aqueous Phase Raw Material tank discharge port pass through the feed inlet of the charging line and catalyst reaction device that are equipped with conveying mechanism and connect；The heating device includes microwave reaction furnace, and the catalyst reaction device includes the vertical reaction tube in microwave reaction furnace, and reaction tube cavity is equipped with the catalyst bed of material.The reaction technology that the utility model is coupled using microwave and phase transfer catalyst fixed bed, it is production process clean and effective, easy to implement, it can effectively prepare a variety of esters products, low production cost.
Description
Technical field
The utility model belongs to chemical reaction device field, in particular to a kind of microwave fixed-bed catalytic esterification system.
Background technique
2,6-naphthalenedicarboxylic acid diallyl is reactive plasticizer, it is the development with petrochemical industry and the new product generated
Kind, it is widely used in preparation Naphthalene diallyl phthalate resin and the crosslinking agent as unsaturated polyester resin etc..From structure
From the point of view of, contain naphthalene nucleus in the network structure of 2,6-naphthalenedicarboxylic acid diallyl phthalate resin, than containing phenyl ring in resin network structure
Allyl ester resin has bigger a rigidity and better heat resistance, therefore in high intensity, high temperature resistant, resistant to chemical etching and fire-retardant
Property, electrical insulating property resin preparation in have more extensive prospect of the application.
In the prior art, the preparation of 2,6-naphthalenedicarboxylic acid diallyl mainly has three approach, is 2,6- naphthalene diformazan respectively
Acid and allyl alcohol dehydration esterification method, 2,6- naphthalenedicarboxylic acid sodium and allyl chloride desalination esterification process and 2,6- naphthalene diformic acid dimethyl ester and
Allyl alcohol ester-interchange method.Strongly acidic catalyst used in dehydration esterification method can cause the polymerization side reactions of allyl alcohol or even make anti-
Liquid resinification is answered, leads to that product yield is low, shade deviation, while there is also biggish corrosion harmfulnesses to production equipment.Transesterification
Method is indirect esterification process, and raw materials used is 2,6-naphthalenedicarboxylic acid dimethyl ester, leads to high production cost, lacks the market competitiveness.It is de-
Salt esterification process overcomes the deficiency of the above method, under suitable catalyst action, esterification can be made more leniently to carry out.
But traditional desalination esterification technique (CN200910305241.6, CN201510775737.5, CN101987820A,
CN200810053565.0, CN105985240A etc.) extremely toxic organic solvent usage amount is big, reaction needs to pressurize, reaction when
Between the deficiencies of too long, phase transfer catalyst cannot recycle, product separation and purification is difficult, iodine number is relatively low.
Even more noteworthy is that the above method is all made of Batch Process mode, periodically charging, blowing and machinery are stirred
It mixes, causes catalyst service life short, artificial and power consumption is big, and production efficiency is low, is unfavorable for being mass produced.Although domestic
There is patent (CN107400564A, CN103553921A, CN105111075A, CN102796620A, CN104804050A) proposition
Continuous esterification technique, but be the dehydration esterification technique and ester exchange process of organic acid and saturated alcohols, and about unsaturation
The continuous desalination esterification of alcohol does not refer to.
Summary of the invention
The purpose of the utility model is to provide a kind of microwave fixed-bed catalytic esterification system, the utility model using microwave and
The reaction technology of phase transfer catalyst fixed bed coupling, it is production process clean and effective, easy to implement, it can effectively prepare a variety of esters
Class product, low production cost.
In order to solve the above technical problems, the technical solution adopted in the utility model is as follows:
A kind of microwave fixed-bed catalytic esterification system the system comprises the raw material storage device being connected to by pipeline, adds
Thermal and catalyst reaction device；
The raw material storage device includes oily phase head tank and Aqueous Phase Raw Material tank, and oily phase, the discharge port of Aqueous Phase Raw Material tank are logical
Cross the feed inlet connection of charging line and catalyst reaction device equipped with conveying mechanism；
The heating device includes microwave reaction furnace, and the catalyst reaction device includes being set in microwave reaction furnace vertically
Reaction tube, reaction tube cavity are equipped with the catalyst bed of material.
The utility model uses nontoxic water for solvent, reduces the harm to human body and environment, while using to micro-
The quaternary ammonium salt that wave radiation has the Monodisperse magnetic microsphere responded more by force to be grafted is that (such catalyst has microwave to phase transfer catalyst
Stronger selective absorption, can form hot localised points, and reaction is accelerated to carry out), by filling be fixed in reaction tube, be made solid
Fixed bed reactor, then reaction tube is fixed on vertically in microwave reaction furnace furnace chamber.Using fixed bed reaction form, batch still is avoided
Material operation is launched present in formula reaction repeatedly, and there is no mechanical stirrings to wear, significantly improves catalyst service life.Together
Shi Caiyong microwave heating is reacted to strengthen, and accelerates reaction to carry out, reactor is made to have the characteristics that small in size, efficiency is high.
The microwave reaction furnace, the full-wave type microwave chemical reaction furnace produced using the happy microwave Co., Ltd in Nanjing three.
By the way that in the upper and lower wall punching of microwave reaction furnace furnace cavity, reaction tube is fixed on vertically in microwave cavity body.The reaction tube can
To use quartz ampoule.Four inlet and outlet can be set on reaction tube, be both adapted to the oily situation mutually reacted with water phase cocurrent,
It can be adapted for the case where oily phase is with water phase countercurrent reaction.
Preheater is respectively equipped on the pipeline of the oily phase, the connection of the discharge outlet of Aqueous Phase Raw Material tank.
Preferably, the preheater is enamel glass raw-pipe type heat-exchanger.
In order to improve reaction efficiency, pre-add can be carried out to oily phase and Aqueous Phase Raw Material before hybrid reaction using preheater
Heat.Enamel glass raw-pipe type heat-exchanger can avoid carbon steel material tubing Fe3+Catalytic polymerization effect to raw material allyl chloride, can be effective
Fouling is prevented, guarantees heat exchange efficiency, while alkaline-resisting corrosion resistance is also more outstanding.
Further, if the mode mutually reacted with water phase cocurrent using oil, microwave fixed-bed catalytic esterification system
Connection structure is as follows:
The charging line include be separately connected oily phase, Aqueous Phase Raw Material tank discharge port branch pipe(tube) and be equipped with blending transportation
The main pipeline of pump, the preheater are respectively provided on two branch pipe(tube)s, and the feed inlet connection of main pipeline and reaction tube, reaction tube goes out
Material mouth is connect with one end of circulating line and drainage conduit respectively, between the circulating line other end and blending transportation pump and branch pipe(tube)
Main pipeline connection, the drainage conduit other end are connect with subsequent separation and purification unit.The blending transportation, which pumps it and is substantially height, to be cut
Cut the equipment that mulser is combined with delivery pump.
Preferably, the supervisor on the branch pipe(tube) between two head tank and preheater, between circulating line and preheater
On road, blending transportation pump be respectively equipped under oily phase, water phase on the main pipeline between reaction tube, on circulating line, in drainage conduit
Expect valve, valve, circulation control valve and blow-off valve after valve, pump before pump.
Preferably, the circulating line is equipped with cooler.
As the technical solution after specifically and preferably, the utility model is also provided with circulation line, specific works
Process is as follows:
It is separately turned on oily phase, water phase baiting valve, pumps valve and circulation control valve after preceding valve, pump, while the unlatching for passing through valve
Degree controls the flow of oily phase raw material and Aqueous Phase Raw Material.Aqueous Phase Raw Material and oily phase raw material are preheated to target temperature through respective preheater
Degree is sent into reaction tube from reaction bottom of the tube using main pipeline by blending transportation pump, and can be back to mixing by circulating line
Delivery pump is simultaneously again introduced into reaction tube, when material is full of reaction tube and forms circulation, closes valve before pumping, this is kept to follow entirely
Ring.It opens microwave reaction furnace and carries out heating reaction, while reaction temperature is controlled by the cooler on circulating line and is stablized in mesh
Mark temperature so reacts certain time, by sample tap sampling monitoring reaction process, when reaction conversion ratio reaches 95% or so,
The preceding valve of pump and blow-off valve are opened simultaneously, while by the opening degree of valve, adjusting recycle ratio and material mean residence time, such as
This realizes continuous charging and discharging.Reaction product by drainage conduit discharge carries out separation and purification, obtains the target product of high-purity.
Water phase is discharged as waste liquid, transports to sewage treatment plant.
If using the mode of oil phase and water phase adverse current esterification, the connection knot of microwave fixed-bed catalytic esterification system
Structure is as follows:
It is equipped with Aqueous Phase Raw Material import at the top of the reaction tube and goes out with oily mutually outlet, bottom equipped with oily phase material inlet and water phase
Mouthful；
Charging line include two one end be separately connected oily phase, Aqueous Phase Raw Material tank discharge port oily phase feed conduit and water
Phase feed conduit, the oily phase feed conduit other end pass through oily phase raw material pump connect with the oily phase material inlet for reacting bottom of the tube, water
The phase feed conduit other end is pumped by Aqueous Phase Raw Material and is connect with the Aqueous Phase Raw Material import at the top of reaction tube, oily phase, Aqueous Phase Raw Material pipe
Preheater is equipped at corresponding head tank on road；
The water phase outlet of reaction tube is connect with recovery channel and Aqueous Phase Raw Material circulating line one end respectively, Aqueous Phase Raw Material circulation
Pipeline and other end Aqueous Phase Raw Material pump connect；
Mutually outlet is connect with drainage conduit and oily phase feedstock circulation pipeline the oil of reaction tube respectively, oily phase feedstock circulation pipeline and
Oily phase raw material pump connection.Drainage conduit is subsequent to connect separation and purification unit.
Preferably, the raw material on the feed conduit between the head tank and preheater, between circulating line and preheater
Valve, loop control before oily phase, water phase baiting valve, pump are respectively equipped on pipeline, on circulating line, on drainage conduit and recovery channel
Valve, blow-off valve and recovery valve.
Preferably, the Aqueous Phase Raw Material circulating line is equipped with cooler.
It is above-mentioned to improve reaction effect for another specific and preferred technical solution to enhance concentration difference mass transfer effect, it can be with
Lighter oily phase raw material is sent by reaction bottom of the tube using countercurrent mode using oil, the significant density contrast of water two-phase
Enter: by lower from upper flowing.The biggish Aqueous Phase Raw Material of density at the top of reaction tube by inputting: flowing from above to below.Two phase countercurrent flow contact
And it reacts.To guarantee time of contact, circulation loop is respectively set in oil, water two-phase.To reduce device complexity, only in heat
Hold one cooler of setting on biggish Aqueous Phase Raw Material circulating line, to guarantee that temperature of reactor is stablized.Concrete operations are as follows:
Oily phase, water phase baiting valve are opened, opens valve and circulation control valve before the pump on two feed conduits, while passing through valve
Opening degree control the flow of oily phase raw material and Aqueous Phase Raw Material.Aqueous Phase Raw Material and oily phase raw material are preheated to through respective preheater
Target temperature, and reaction is sent into using Aqueous Phase Raw Material pipeline and oily phase feed conduit by Aqueous Phase Raw Material pump and oily phase raw material pump respectively
In pipe, at the same oily phase, Aqueous Phase Raw Material can be back to respectively from Aqueous Phase Raw Material circulating line and oily phase feedstock circulation pipeline it is corresponding
It at raw material pump, and is pumped in reaction tube again, so when material is full of reaction tube and forms circulation, closes two and pump preceding valve,
Keep the complete alternation.It opens microwave reaction furnace and carries out heating reaction, while being tieed up using the cooler on Aqueous Phase Raw Material circulating line
Holding reaction temperature is target temperature.So reaction certain time, by sample tap sampling monitoring reaction process, when conversion ratio reaches
When 95% or so, while opening two and pumping preceding valve, blow-off valve and recovery valve, while passing through the opening degree of control valve, control loop
Than with material mean residence time, so realization continuous charging and discharging.The reaction product of oily phase drainage conduit discharge carries out separation and purification
Up to the target product of high-purity, recovery channel discharge is water-phase product, is discharged as waste liquid, transports to sewage treatment plant.
The utility model compared with prior art, has the advantages that
1) the utility model uses nontoxic water for solvent, reduces the harm to human body and environment；
2) use the quaternary ammonium salt for thering is the Monodisperse magnetic microsphere responded more by force to be grafted to microwave radiation for phase transfer catalyst
(this catalyst has stronger selective absorption to microwave, can form hot localised points, and reaction is accelerated to carry out), by filling fixation
In reaction tube, fixed bed reactors are made, then it is fixed on vertically in microwave reaction furnace furnace chamber.Using fixed bed reaction shape
Formula avoids launching material operation present in batch tank reaction repeatedly, and there is no mechanical stirring abrasion, significantly improves catalysis
Agent service life.Strengthen reaction using microwave heating simultaneously, reaction is accelerated to carry out, having reactor, small in size, efficiency is high
The characteristics of.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of microwave fixed-bed catalytic esterification system described in embodiment 1；
Fig. 2 is the structural schematic diagram of microwave fixed-bed catalytic esterification system described in embodiment 2.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Embodiment 1
As shown in Figure 1, a kind of microwave fixed-bed catalytic esterification system, the system comprises the raw material being connected to by pipeline storages
Cryopreservation device, heating device and catalyst reaction device；
The heating device includes microwave reaction furnace 5, and the catalyst reaction device includes being set in microwave reaction furnace 5 vertically
Reaction tube 6,6 inner cavity of reaction tube be equipped with the catalyst bed of material；
The raw material storage device includes oily phase head tank 2 and Aqueous Phase Raw Material tank 1, oily phase head tank 2, Aqueous Phase Raw Material tank 1
Discharge port by be equipped with blending transportation pump 43 charging line connect with the feed inlet of 6 bottom of reaction tube；
The charging line include be separately connected oily phase, Aqueous Phase Raw Material tank discharge port branch pipe(tube) 3 and be equipped with mix it is defeated
The main pipeline 4 of pump 43 is sent, two preheaters 31 are respectively provided on two branch pipe(tube)s 3, and main pipeline 4 is connect with the feed inlet of reaction tube 6, instead
Should the discharge port of pipe 6 connect respectively with one end of circulating line 7 and drainage conduit 8,7 other end of circulating line and blending transportation pump 43
Main pipeline 4 between branch pipe(tube) 3 connects, and 8 other end of drainage conduit is connected to separation and purification unit 9, and circulating line 7 is equipped with cold
But device 72.The preheater 31 is enamel glass raw-pipe type heat-exchanger.Branch pipe(tube) between two head tank and preheater 31
It is equipped with oily phase baiting valve 21, water phase baiting valve 11, the main pipeline between circulating line 7 and preheater 31, which is equipped with, pumps preceding valve
41, valve 42, circulating line 7 are equipped with circulation control valve after the main pipeline between blending transportation pump 43 and reaction tube 6 is equipped with pump
71, drainage conduit 8 is equipped with blow-off valve 81.
For producing 2,6-naphthalenedicarboxylic acid diallyl, specific work process is following, and (design parameter is not belonging to this reality
With novel protected scope, therefore do not list in detail):
It is separately turned on oily phase, water phase baiting valve, pumps valve and circulation control valve after preceding valve, pump, while the unlatching for passing through valve
Degree controls the amount of oily phase raw material and Aqueous Phase Raw Material.Aqueous Phase Raw Material and oily phase raw material are preheated to 40 DEG C -45 through respective preheater
DEG C, it is sent into reaction tube using main pipeline from reaction bottom of the tube by blending transportation pump, and mixing can be back to by circulating line
Delivery pump is simultaneously again introduced into reaction tube, when material is full of reaction tube and forms circulation, closes valve before pumping, this is kept to follow entirely
Ring.It opens microwave reaction furnace and carries out heating reaction, while reaction temperature is controlled by the cooler on circulating line and is stablized in 50-
60 DEG C, so reaction certain time.By sample tap sampling monitoring reaction process, when reaction conversion ratio reaches 95% or so, together
Valve and blow-off valve before Shi Kaiqi is pumped, while by the opening degree of valve, recycle ratio and material mean residence time are adjusted, so
Realize continuous charging and discharging, after testing, the substrate transformation rate is up to 89.2-94.5%, and selectivity of product is between 95.4-98.6%.
Reaction product by drainage conduit discharge passes through separation and purification cell processing, obtains preparation 2,6-naphthalenedicarboxylic acid diallyl sterling
(HPLC > 99%, mp=87-89 DEG C), stable product quality.Water phase is discharged as waste liquid, transports to sewage treatment plant.
Embodiment 2
As shown in Fig. 2, a kind of microwave fixed-bed catalytic esterification system, the system comprises the raw material being connected to by pipeline storages
Cryopreservation device, heating device and catalyst reaction device；
The heating device includes microwave reaction furnace 5, and the catalyst reaction device includes being set in microwave reaction furnace 5 vertically
Reaction tube 6,6 inner cavity of reaction tube be equipped with the catalyst bed of material；
The raw material storage device includes oily phase head tank 2 and Aqueous Phase Raw Material tank 1, the discharge port of oily phase, Aqueous Phase Raw Material tank
It is connect by charging line with reaction tube 6；
Aqueous Phase Raw Material import is equipped at the top of reaction tube 6, and mutually outlet, bottom are equipped with oily phase material inlet and water phase outlet with oil；
Charging line include two one end be separately connected oily phase, Aqueous Phase Raw Material tank discharge port oily 22 and of phase feed conduit
Aqueous Phase Raw Material pipeline 12, oily 22 other end of phase feed conduit pass through the oily phase raw material of oily phase raw material pump 25 and 6 bottom of reaction tube into
Mouth connection, 12 other end of Aqueous Phase Raw Material pipeline are connect by Aqueous Phase Raw Material pump 15 with the Aqueous Phase Raw Material import at 6 top of reaction tube, oil
Preheater 31 is equipped in phase, Aqueous Phase Raw Material pipeline at corresponding head tank, the preheater 31 is that enamel shell and tube changes
Hot device.
The water phase outlet of reaction tube 6 is connect with recovery channel 14 and 13 one end of Aqueous Phase Raw Material circulating line respectively, and water phase is former
Material 13 other end of circulating line is connect with Aqueous Phase Raw Material pump 15, and Aqueous Phase Raw Material circulating line 13 is equipped with cooler 72；
Mutually outlet is connect with drainage conduit 23 and oily phase feedstock circulation pipeline 24 oil of reaction tube 6 respectively, oily phase feedstock circulation
Pipeline 24 is connect with oily phase raw material pump 25.
Feed conduit between the head tank and preheater is equipped with oily phase baiting valve 21, water phase baiting valve 11, circulation
Feed conduit between pipeline and preheater is equipped with and pumps preceding valve 41, circulating line is equipped with circulation control valve 44, drainage conduit 23
It is equipped with blow-off valve 45, recovery channel 14 is equipped with recovery valve 46.
The subsequent connection separation and purification unit of drainage conduit.
For producing 2,6-naphthalenedicarboxylic acid diallyl, specific work process is following, and (design parameter is not belonging to this reality
With novel protected scope, therefore do not list in detail):
Oily phase, water phase baiting valve are opened, opens valve and circulation control valve before the pump on two feed conduits, while passing through valve
Opening degree control the amount of oily phase raw material and Aqueous Phase Raw Material.Aqueous Phase Raw Material and oily phase raw material are preheated to 35 through respective preheater
DEG C -40 DEG C, and reaction is sent into using Aqueous Phase Raw Material pipeline and oily phase feed conduit by Aqueous Phase Raw Material pump and oily phase raw material pump respectively
In pipe, while oily phase, Aqueous Phase Raw Material and being back to respectively from Aqueous Phase Raw Material circulating line and oily phase feedstock circulation pipeline corresponding
It at raw material pump, and is pumped in reaction tube again, so when material is full of reaction tube and forms circulation, closes two and pump preceding valve,
Keep the complete alternation.It opens microwave reaction furnace and carries out heating reaction, while being tieed up using the cooler on Aqueous Phase Raw Material circulating line
Holding reaction temperature is 50-60 DEG C.So reaction certain time, by sample tap sampling monitoring reaction process, when conversion ratio reaches
When 95% or so, start simultaneously at valve, blow-off valve and recovery valve before two pumps, while by the opening degree of valve, adjust recycle ratio and
Material mean residence time, so realization continuous charging and discharging, after testing, the substrate transformation rate is up to 86.8-91.0%, product choosing
Selecting property is between 93.4-97.2%.The as esters product of high-purity, recovery tube is discharged after reaction product separation and purification in drainage conduit
Road discharge is water-phase product, is discharged as waste liquid, transports to sewage treatment plant.
System versatility described in the utility model is stronger, in addition to it can be applied to 2,6-naphthalenedicarboxylic acid diallyl, is also applicable in
In the production of 1,4- naphthalene diallyl succinate, diisooctyl phthalate, diallyl phthalate and aliphatic ester.
Therefore all directly utilizations or simple modification utilize the content of the technical scheme of the utility model to produce esters product, still fall within this skill
The protection scope of art scheme.
Claims (9)
1. a kind of microwave fixed-bed catalytic esterification system, which is characterized in that the system comprises the raw material being connected to by pipeline storages
Cryopreservation device, heating device and catalyst reaction device；
The raw material storage device includes oily phase head tank and Aqueous Phase Raw Material tank, oily phase, Aqueous Phase Raw Material tank discharge port by setting
The feed inlet of the charging line and catalyst reaction device that have conveying mechanism connects；
The heating device includes microwave reaction furnace, and the catalyst reaction device includes the vertical reaction in microwave reaction furnace
Pipe, reaction tube cavity are equipped with the catalyst bed of material.
2. microwave fixed-bed catalytic esterification system as described in claim 1, which is characterized in that the oil phase, Aqueous Phase Raw Material tank
Discharge outlet connection pipeline on be respectively equipped with preheater.
3. microwave fixed-bed catalytic esterification system as claimed in claim 2, which is characterized in that the preheater is enamel
Tubular heat exchanger.
4. microwave fixed-bed catalytic esterification system as claimed in claim 2 or claim 3, which is characterized in that the charging line includes
Be separately connected oily phase, Aqueous Phase Raw Material tank discharge port branch pipe(tube) and main pipeline equipped with blending transportation pump, the preheater point
Be not located on branch pipe(tube), the connection of the feed inlet of main pipeline and reaction tube, the discharge port of reaction tube respectively with circulating line and discharge
One end of pipe connects, and the main pipeline between the circulating line other end and blending transportation pump and branch pipe(tube) connects, the drainage conduit other end
It is connect with separation and purification unit.
5. microwave fixed-bed catalytic esterification system as claimed in claim 4, which is characterized in that the oil phase, Aqueous Phase Raw Material tank
On main pipeline on branch pipe(tube) between preheater, between circulating line and preheater, between blending transportation pump and reaction tube
Main pipeline on, valve, loop control after valve, pump are respectively equipped with before oily phase, water phase baiting valve, pump on circulating line, in drainage conduit
Valve and blow-off valve.
6. microwave fixed-bed catalytic esterification system as claimed in claim 4, which is characterized in that the circulating line is equipped with cold
But device.
7. microwave fixed-bed catalytic esterification system a method according to any one of claims 1-3, which is characterized in that at the top of the reaction tube
Equipped with Aqueous Phase Raw Material import, mutually outlet, bottom are equipped with oily phase material inlet and water phase outlet with oil；
Charging line includes the oily phase feed conduit and one end connection Aqueous Phase Raw Material for the discharge port that one end connects oily phase head tank
The Aqueous Phase Raw Material pipeline of the discharge port of tank, the oily phase feed conduit other end passes through oily phase raw material pump and the oil for reacting bottom of the tube is mutually former
Material import connection, the Aqueous Phase Raw Material pipeline other end are pumped by Aqueous Phase Raw Material and are connect with the Aqueous Phase Raw Material import at the top of reaction tube, oil
Preheater is equipped at corresponding head tank in phase, Aqueous Phase Raw Material pipeline；
The water phase outlet of reaction tube is connect with recovery channel and Aqueous Phase Raw Material circulating line one end respectively, Aqueous Phase Raw Material circulating line
The other end and Aqueous Phase Raw Material pump connect；
Mutually outlet is connect with drainage conduit and oily phase feedstock circulation pipeline the oil of reaction tube respectively, oily phase feedstock circulation pipeline and oily phase
Raw material pump connection.
8. microwave fixed-bed catalytic esterification system as claimed in claim 7, which is characterized in that the head tank and preheater it
Between feed conduit on, on the feed conduit between circulating line and preheater, on circulating line, drainage conduit and recovery channel
On be respectively equipped with valve, circulation control valve, blow-off valve and recovery valve before oily phase, water phase baiting valve, pump.
9. microwave fixed-bed catalytic esterification system as claimed in claim 7, which is characterized in that the Aqueous Phase Raw Material circulating line
It is equipped with cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820994772.5U CN208586226U (en) | 2018-06-27 | 2018-06-27 | A kind of microwave fixed-bed catalytic esterification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820994772.5U CN208586226U (en) | 2018-06-27 | 2018-06-27 | A kind of microwave fixed-bed catalytic esterification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208586226U true CN208586226U (en) | 2019-03-08 |
Family
ID=65537414
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|---|---|---|---|
| CN201820994772.5U Expired - Fee Related CN208586226U (en) | 2018-06-27 | 2018-06-27 | A kind of microwave fixed-bed catalytic esterification system |
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| Country | Link |
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2018
- 2018-06-27 CN CN201820994772.5U patent/CN208586226U/en not_active Expired - Fee Related
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Granted publication date: 20190308 Termination date: 20210627 |