CN1861561A - Radial reactor for preparing ethylene (propylene) carbonate - Google Patents
Radial reactor for preparing ethylene (propylene) carbonate Download PDFInfo
- Publication number
- CN1861561A CN1861561A CNA2005100691439A CN200510069143A CN1861561A CN 1861561 A CN1861561 A CN 1861561A CN A2005100691439 A CNA2005100691439 A CN A2005100691439A CN 200510069143 A CN200510069143 A CN 200510069143A CN 1861561 A CN1861561 A CN 1861561A
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- Prior art keywords
- reactor
- catalyst
- pipe
- beds
- reaction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- QQUZYDCFSDMNPX-UHFFFAOYSA-N ethene;4-methyl-1,3-dioxolan-2-one Chemical compound C=C.CC1COC(=O)O1 QQUZYDCFSDMNPX-UHFFFAOYSA-N 0.000 title abstract 2
- -1 alkene ester Chemical class 0.000 claims description 15
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 13
- 239000005977 Ethylene Substances 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 abstract description 25
- 239000003054 catalyst Substances 0.000 abstract description 10
- 238000009826 distribution Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000011949 solid catalyst Substances 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 9
- 239000000047 product Substances 0.000 description 7
- 235000011089 carbon dioxide Nutrition 0.000 description 5
- 239000007795 chemical reaction product Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 239000004593 Epoxy Substances 0.000 description 4
- 150000001335 aliphatic alkanes Chemical class 0.000 description 4
- 239000012429 reaction media Substances 0.000 description 4
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000009827 uniform distribution Methods 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- HWCKGOZZJDHMNC-UHFFFAOYSA-M tetraethylammonium bromide Chemical compound [Br-].CC[N+](CC)(CC)CC HWCKGOZZJDHMNC-UHFFFAOYSA-M 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 208000012839 conversion disease Diseases 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002638 heterogeneous catalyst Substances 0.000 description 1
- 239000002815 homogeneous catalyst Substances 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229960004839 potassium iodide Drugs 0.000 description 1
- 235000007715 potassium iodide Nutrition 0.000 description 1
- 238000003822 preparative gas chromatography Methods 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- Y02P20/141—Feedstock
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention provides a radial reactor 1 for preparing ethylene (propylene) carbonate, which comprises a feeding pipe 2, an inner cylinder 5 and an outer cylinder 6 which are concentric circles and have small holes and different radiuses, a catalyst bed layer 3 between the inner cylinder 5 and the outer cylinder 6, and a U-shaped pipe 4 in the catalyst bed layer 3, wherein the feeding pipe 2 is positioned at the axial center in the reactor and provided with an opening on the surface of the pipe wall. The invention can make the raw material gas fully contact with the catalyst, the temperature distribution in the catalyst bed layer is uniform, and the reaction heat can be removed in time, thereby improving the surface utilization rate of the catalyst, reducing the loss of active components of the solid catalyst, prolonging the service life of the catalyst, increasing the production capacity, reducing the energy consumption, and leading the conversion rate of the ethylene oxide to reach 95-99 percent; the selectivity reaches 96-98 percent.
Description
Technical field
The present invention relates to the reactor of a kind of preparation ethylene (third) alkene ester.。
Background technology
Reactor is a nucleus equipment in industrial production, its efficient and feature play decisive influence to the Technological Economy of device, the characteristic of catalyzer and reaction process will influence the efficient of reactor, may cause the beds local superheating, influence the quality of product and the throughput of reactor.
Fette, Seifen, the reactor that is used for carbonate synthesis second (third) alkene ester among the anstrichmittel 73,1971 is made up of single tube, does not have internals, there is not the product circulation, the reaction heat that produces in the reaction process shifts out by transmitting medium-water coolant, and the efficient that heat of reaction shifts out is low, and the beds axial temperature difference is big, temperature of reaction is up to 220 ℃ especially, can produce destroying infection to product; In the full scale plant production process, be difficult to overcome this shortcoming.
Adopt stream tube and pump to be combined to form recirculation reactor among the German Offenlegungsschrift 232, prepare NSC 11801 under 1.0～5.0MPa and 100～200 ℃ of conditions, reactor is connected with agitator; But owing to can not control the reaction heat that reaction produces, so part can take place and transform in oxyethane, and reaction conversion ratio is reduced.
U.S.P 5,508,442 adopt the bubble-cap reactor, its length-to-diameter ratio is 2: 50, feed carbon dioxide and epoxy second (third) alkane join the reactor that has reaction medium ethylene (third) alkene ester from reactor bottom, distribution device is installed in the reactor head exit, and reaction product is circulated in reactor; But members such as baffle plate, orifice plate are arranged, complex structure in the bubble-cap reactor; And reaction heat still makes the reactive system temperature raise 5～80 ℃.
CN 1098100A provides a kind of compounded solvent of cyclocarbonate, contains two kinds of components of NSC 11801 and propylene carbonate, is reflected in the synthetic tower and carries out, and catalyzer adopts tetraethylammonium bromide; Its shortcoming is: because of common synthetic tower reaction efficiency low, so in the invention implementation process, need " will enter second synthetic tower and finish the equipment of device and continue reaction " from the solution that synthetic tower is drawn, and " the double solvents raw product of its production; need the intermittent vacuum distillation to purify ", in addition, the tetraethylammonium bromide that is adopted is a homogeneous catalyst, is difficult for separating from the reaction product system, influence product purity, increase facility investment.
CN 0311145914.5 provide recirculation reactor " when reactant (carbonic acid gas and epoxy second (third) alkane), catalyzer (homogeneous phase or heterogeneous catalyst), and reaction medium (ethylene (third) alkene ester) enter the reactor from circulating-pump outlet; from jet ejectors or the ejection of pipe sparger; make homogeneous phase or non-homogeneous mixture fully contact hybrid reaction ", the shortcoming of this method is with reaction mass round-robin catalyzer more, lose greatlyyer, need regularly add catalyzer.
Summary of the invention
Task of the present invention provide a kind of resistance little, conduct heat, the radial reactor that is used to prepare ethylene (third) alkene ester that efficient is high.
When adopting heterogeneous load potassiumiodide solid catalyst to prepare ethylene (third) alkene ester, the activity of such catalysts component easily runs off in reaction medium, and liberated heat easily makes the beds temperature runaway in the reaction process.According to this reaction characteristics, the reactor that is used to prepare ethylene (third) alkene ester should have reaction product in case generate the characteristics that just can leave beds and reaction heat is in time shifted out.
The radial reactor of preparation ethylene provided by the invention (third) alkene ester adopts following technical scheme:
The radial reactor 1 of preparation ethylene provided by the invention (third) alkene ester, comprise the tube wall surface perforate that is positioned at the inside reactor axial centre feed-pipe 2, have concentric(al) circles inner core 5 and urceolus 6, the beds 3 between inner core 5 and the urceolus 6 and the U type pipe 4 in the beds 3 that two radiuses of aperture do not wait.
Specifically, the radial reactor 1 of preparation ethylene provided by the invention (third) alkene ester comprises:
The feed-pipe 2 of the tube wall surface perforate of an inside reactor axial centre is positioned at concentric(al) circles inner core center;
An inner core 5 and a urceolus 6, its radius does not wait, and is concentric with reactor shell;
Beds 3 is formed by catalyst filling between inner core and the urceolus;
U type pipe 4 between inner core 5 and urceolus 6, can be organized more.
The invention will be further described below in conjunction with accompanying drawing:
Under certain pressure, after mixed raw material gas (epoxy second (third) alkane and carbonic acid gas) enters reactor 1 in certain proportion, after distributing via the perforate of the feed-pipe 2 of its inner axial centre, the beds of forming by the concentric(al) circles inner core 5 that do not wait by two radiuses and urceolus 6 along radial direction 3, the aperture that reaction gas passes on inner core 5 and urceolus 6 barrels is realized radial flow, mixed raw material gas (oxyethane and carbonic acid gas) is fully contacted with catalyzer, under certain temperature and pressure condition, react, ethylene (third) the alkene ester products that generates flows out to reactor under outlet and discharges from the outside of cyclic beds 3 with distribution hole, the reaction heat of reaction generation is shifted out by the heat-eliminating medium in the U type pipe 4 in the beds 3.
For reaching better effect, the aperture on inner core 5 and the urceolus 6 can be equally distributed wide-angle perforate, and percentage of open area is preferably 15～20%.
Perforate on feed-pipe 2 walls can be equally distributed wide-angle perforate, and number is more than one, and percentage of open area is 1.0-1.2%.
The U type pipe that is provided with in the beds can be evenly to be arranged in the beds by many groups U type pipe.
The present invention has following advantage:
(1) feed-pipe and two radiuses having aperture the concentric(al) circles inner core and the urceolus that do not wait of reactor provided by the invention by adopting surperficial perforate, make the feed-pipe radial flow of unstripped gas along its inner axial centre, unstripped gas fully contacts with catalyzer, simultaneously reaction product is in time left beds from the urceolus of perforate, reduced activity of such catalysts component number of dropouts in reaction medium, in this course, because mixed gas constantly flows out from the perforate of charging tube wall, it all can make the static pressure of the feed-pipe that fluid passes through descend along journey and wall friction and gas momentum exchange, like this mixed gas radial flow impellent change vertically less, thereby make mixed gas uniform distribution vertically.
(2) the present invention is in order to improve temperature distribution evenness in the beds, and in time shift out the heat that reaction is emitted, U type pipe is set in beds, reduce radial direction temperature difference and axial temperature is poor by the heat-eliminating medium in the U type pipe, reached the radial and axial temperature uniform distribution of beds, solved the material mixed gas bulk concentration height of fixed-bed reactor internal reaction thing in the beds ingress, thereby cause temperature of reaction easily out of control, further cause the problem of beds local superheating.
(3) unstripped gas radial flow path of the present invention is short, the resistance of reactant in distributing passage reduces greatly, makes the radial temperature uniform distribution of catalyzer, improved the surperficial utilization ratio of catalyzer greatly, reduce the loss of the active ingredient of solid catalyst, increased life of catalyst.Simultaneously can improve transformation efficiency, increase throughput, and capable of reducing energy consumption, and the oxyethane transformation efficiency can reach 95-99%; Selectivity reaches 96-98%.
Description of drawings
Accompanying drawing is the radial reactor structural representation of preparation ethylene (third) alkene ester.
Wherein: 1-reactor 2-feed-pipe 3-beds 4-U type pipe
5-inner core 6-urceolus 7-oxyethane and carbonic acid gas inlet
The outlet of 8-heat-eliminating medium inlet 9--heat-eliminating medium
The outlet of 10-NSC 11801
Embodiment
See accompanying drawing, use radial reactor of the present invention to be prepared NSC 11801.Under certain pressure, carbonic acid gas and oxyethane enter in the reactor 1 with 20: 1～80: 1 ratio, via (perforate on feed-pipe 2 walls is equally distributed wide-angle perforate after the pore distribution on the feed-pipe 2 of its inner axial centre, percentage of open area is 1.15%), along concentric(al) circles inner core 5 radial inflow beds 3, flow out from the concentric(al) circles urceolus 6 of beds 3, the percentage of open area of aperture is 17% on inner core 5 and the urceolus 6, at 110-125 ℃, 2.0-2.5MPa under the condition, feed carbon dioxide and epoxy second (third) alkane is through beds 3 reactions, and the ethylene carbonate ester products of generation comes out to flow to outlet discharge reactor under from the outside of cyclic beds 3 with distribution hole.The reaction heat that reaction generates is shifted out by the heat-eliminating medium in the U type pipe in the bed.Reaction product identifies that with vapor-phase chromatography the oxyethane transformation efficiency can reach 95-99% as a result; Selectivity reaches 96-98%.
Claims (3)
1. the radial reactor 1 for preparing ethylene (third) alkene ester, comprise: be positioned at the tube wall surface perforate of inside reactor axial centre feed-pipe 2, have concentric(al) circles inner core 5 and urceolus 6, the beds 3 between inner core 5 and the urceolus 6 and the U type pipe 4 in the beds 3 that two radiuses of aperture do not wait.
2. radial reactor according to claim 1 is characterized in that the perforate on feed-pipe 2 walls wherein is equally distributed wide-angle perforate, and percentage of open area is 1.0-1.2%.
3. radial reactor according to claim 1 is characterized in that wherein inner core 5 and the aperture on the urceolus 6 are equally distributed wide-angle perforates, and percentage of open area is 15～20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100691439A CN100443462C (en) | 2005-05-12 | 2005-05-12 | radial reactor for preparing ethylene carbonate or propylene carbonate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100691439A CN100443462C (en) | 2005-05-12 | 2005-05-12 | radial reactor for preparing ethylene carbonate or propylene carbonate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1861561A true CN1861561A (en) | 2006-11-15 |
| CN100443462C CN100443462C (en) | 2008-12-17 |
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ID=37389106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100691439A Expired - Fee Related CN100443462C (en) | 2005-05-12 | 2005-05-12 | radial reactor for preparing ethylene carbonate or propylene carbonate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100443462C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108704600A (en) * | 2018-07-25 | 2018-10-26 | 北京国能中林科技开发有限公司 | A kind of Airlift circulating reactor of hydrogenation reaction suitable for liquid hydrogen storage carrier |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1141102B (en) * | 1980-11-28 | 1986-10-01 | Ammonia Casale Sa | AXIAL-RADIAL REACTOR FOR HETEROGENEOUS SYNTHESIS |
| CN2291201Y (en) * | 1997-04-28 | 1998-09-16 | 华东理工大学 | Radial fixed bed catalytic reactor for co-producing steam |
| CN1152004C (en) * | 2001-02-22 | 2004-06-02 | 中国科学院山西煤炭化学研究所 | Process for preparing propenyl carbonate or ethylene carbonate and reactor thereof |
| CN1241900C (en) * | 2003-10-16 | 2006-02-15 | 华东理工大学 | Method for joint production of dialkyl carbonate and diatomic alcohol |
-
2005
- 2005-05-12 CN CNB2005100691439A patent/CN100443462C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108704600A (en) * | 2018-07-25 | 2018-10-26 | 北京国能中林科技开发有限公司 | A kind of Airlift circulating reactor of hydrogenation reaction suitable for liquid hydrogen storage carrier |
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| Publication number | Publication date |
|---|---|
| CN100443462C (en) | 2008-12-17 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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Granted publication date: 20081217 |