CN202465566U - Crude methyl tetrahydrophthalic anhydride continuous production device - Google Patents
Crude methyl tetrahydrophthalic anhydride continuous production device Download PDFInfo
- Publication number
- CN202465566U CN202465566U CN201120484315XU CN201120484315U CN202465566U CN 202465566 U CN202465566 U CN 202465566U CN 201120484315X U CN201120484315X U CN 201120484315XU CN 201120484315 U CN201120484315 U CN 201120484315U CN 202465566 U CN202465566 U CN 202465566U
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- CN
- China
- Prior art keywords
- flash tank
- heat exchanger
- condensing heat
- reactor
- reactor drum
- 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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- MWSKJDNQKGCKPA-UHFFFAOYSA-N 6-methyl-3a,4,5,7a-tetrahydro-2-benzofuran-1,3-dione Chemical compound C1CC(C)=CC2C(=O)OC(=O)C12 MWSKJDNQKGCKPA-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 238000010924 continuous production Methods 0.000 title abstract 5
- 230000008676 import Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 28
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 11
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 150000001993 dienes Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- LWMIDUUVMLBKQF-UHFFFAOYSA-N 4-methyl-3a,4,5,7a-tetrahydro-2-benzofuran-1,3-dione Chemical compound CC1CC=CC2C(=O)OC(=O)C12 LWMIDUUVMLBKQF-UHFFFAOYSA-N 0.000 description 1
- JDBDDNFATWXGQZ-UHFFFAOYSA-N 5-methyl-3a,4,5,7a-tetrahydro-2-benzofuran-1,3-dione Chemical compound C1=CC(C)CC2C(=O)OC(=O)C12 JDBDDNFATWXGQZ-UHFFFAOYSA-N 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005414 inactive ingredient Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Furan Compounds (AREA)
Abstract
The utility model relates to a crude methyl tetrahydrophthalic anhydride continuous production device. The crude methyl tetrahydrophthalic anhydride continuous production device comprises a first reactor, a second reactor, and a third reactor. A flash tank comprises a first flash tank, a second flash tank, and a third flash. The crude methyl tetrahydrophthalic anhydride continuous production device comprises a first condensing heat exchanger, a second condensing heat exchanger, and a third condensing heat exchanger. The first reactor, the first flash tank, the second reactor, the second flash tank, the third reactor, and the third flash tank are connected through pipes in sequence. The first flash tank is connected with the first condensing heat exchanger. The second flash tank is connected with the second condensing heat exchanger through a pipe. The second condensing heat exchanger is connected with an inlet of the first reactor. The third flash tank is connected with the third condensing heat exchanger through a pipe. The third condensing heat exchanger is connected with an inlet of the second reactor. The crude methyl tetrahydrophthalic anhydride continuous production device reduces operation time, operation cost, difficulty of controlling reactive system temperature in the initial stage, and reactive volume required for a reaction.
Description
Technical field
The utility model relates to a kind of serialization and produces thick methyl tetrahydro phthalic anhydride device.
Background technology
Methyl tetrahydro phthalic anhydride is can (effective constituent is trans m-pentadiene, isoprene through mixed C 5; All the other are inactive ingredients) (m-pentadiene in the production is trans m-pentadiene with cis-butenedioic anhydride or m-pentadiene enriching soln; The cis m-pentadiene is an inerts e) obtain with the cis-butenedioic anhydride reaction, this reaction is second order reaction.The synthetic batch operation that still adopts of at present thick methyl tetrahydro phthalic anhydride; At first the solid cis-butenedioic anhydride is added drop-wise in the C 5 fraction after in molten-bath, being heated to 70 ~ 80 ℃ of thawings; Effective diolefin and cis-butenedioic anhydride mol ratio (1.05 ~ 1.1) among the C5: 1; (in this reaction, temperature of reaction is lower than 50 ℃, and cis-butenedioic anhydride is prone to solidify at 50 ~ 55 ℃; Temperature is higher than 55 ℃; The easy polymerization of C5), react 4h under 0.1 ~ 0.12MPa condition; Isoprene and trans m-pentadiene and cis-butenedioic anhydride carry out addition reaction among the C5; Obtain 4-methyl tetrahydro phthalic anhydride and 3-methyl tetrahydro phthalic anhydride mixture, the reaction mass distillation is removed unreacted C5 and is got thick product (requiring thick product not contain cis-butenedioic anhydride).In the research that thick methyl tetrahydro phthalic anhydride serialization is produced, have two subject matters in the institute at present: the initial reaction stage reactant concn is higher, and speed of response is fast, and heat release is bigger, and temperature is wayward.Reaction late phase reaction substrate concentration is lower, and speed of response is slower, and the reaction volume that needs is bigger.Refluxing after the evaporation that the batch reactor controlled temperature mainly leans on mixed C 5 compositions and the external condensation, is the ratio of the effective diolefin of raising for what reduce that the reaction times takes.
Summary of the invention
But the purpose of the utility model provides a kind of continous way operation, has lowered running time and process cost, has reduced the difficulty of control initial reaction system temperature, and thick methyl tetrahydro phthalic anhydride device is produced in the serialization that has lowered the reaction volume that reacts required.
In order to solve the problems of the technologies described above, the utility model is able to solve through following technical proposals:
Thick methyl tetrahydro phthalic anhydride device is produced in serialization; Comprise reactor drum, flash tank, condensing heat exchanger and associated conduit; Described reactor drum comprises reactor drum one, reactor drum two, reactor drum three, and flash tank comprises flash tank one, flash tank two, flash tank three, and condensing heat exchanger comprises condensing heat exchanger one, condensing heat exchanger two, condensing heat exchanger three; Said reactor drum one, flash tank one, reactor drum two, flash tank two, reactor drum three, flash tank three pass through pipe connection successively; Said flash tank one links to each other with condensing heat exchanger one, and said flash tank two is connected with condensing heat exchanger two through pipeline, and condensing heat exchanger two links to each other with the import of reactor drum one; Said flash tank threeway piping is connected with condensing heat exchanger three, and condensing heat exchanger three links to each other with the import of reactor drum two.In the production operation; Cis-butenedioic anhydride and mixed C 5 approximate countercurrent reactions; Make this be reflected at initial reaction stage and all be in reasonable levels, reduced the difficulty of initial stage control temperature of reaction system and reduced the required reaction volume of industrial production significantly with reaction late phase reaction substrate concentration.
As preferably, described reactor drum is a tubular reactor.
The utility model has significant technique effect owing to adopted above technical scheme:
1, owing to adopt the aforementioned production method scheme, C5 and cis-butenedioic anhydride reaction have been adopted the continous way operation for successive reaction, have lowered in batch operation formula required running time and process cost.
2, the approximate countercurrent reaction of C5 and cis-butenedioic anhydride, the reduction of initial reaction stage speed of response and the speed of response in reaction later stage improve greatly in the reaction process, thereby have reduced the difficulty of control initial reaction system temperature and lowered the reaction volume that reacts required.
Description of drawings
Fig. 1 is that the structure of the utility model connects synoptic diagram.
Fig. 2 is the principle schematic of the utility model.
Embodiment
The utility model is described in further detail with embodiment below in conjunction with accompanying drawing 1 to accompanying drawing 2:
Embodiment 1
Thick methyl tetrahydro phthalic anhydride device is produced in serialization; Extremely shown in Figure 2 like Fig. 1; Comprise reactor drum, flash tank, condensing heat exchanger and associated conduit; Reactor drum comprises pipe reaction 1, tubular reactor 2 12, tubular reactor 3 13, and flash tank comprises flash tank 1, flash tank 2 22, flash tank 3 23, and condensing heat exchanger comprises condensing heat exchanger 1, condensing heat exchanger 2 32, condensing heat exchanger 3 33; Said tubular reactor 1, flash tank 1, tubular reactor 2 12, flash tank 2 22, tubular reactor 3 13, flash tank 3 23 pass through pipe connection successively; Said flash tank 1 links to each other with condensing heat exchanger 1, and said flash tank 2 22 is connected with condensing heat exchanger 2 32 through pipeline, and condensing heat exchanger 2 32 links to each other with the import of tubular reactor 1; Said flash tank 3 23 is connected with condensing heat exchanger 3 33 through pipeline, and condensing heat exchanger 3 33 links to each other with the import of tubular reactor 2 12.
Cis-butenedioic anhydride melts liquid 101 and mixes entering tubular reactor 1 in back with backflow C5 205, gets into flash tank 1 then, and C5 goes out system through reacting heat evaporation, gets into condensing heat exchanger 1 and becomes the C5 waste liquid, and liquid phase 104 gets into tubular reactors 2 12.Liquid 104 gets into tubular reactor 2 12 with backflow C5 solution 203 and reacts; Leave tubular reactor 2 12 and get into flash tank 2 22; Gas phase 204 gets into tubular reactor 1 after getting into condensing heat exchanger 2 32 condensations, and liquid phase 107 gets into tubular reactor 3 13.Liquid phase 107 gets into tubular reactor 3 13 with fresh feed C5 solution, and reactant gets into flash tank 3 23, and gas phase gets into tubular reactor 2 12 after getting into condensing heat exchanger 3 33 condensations, and liquid phase 110 is a product.
In a word, the above is merely the preferred embodiment of the utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to the covering scope of the utility model patent.
Claims (2)
1. thick methyl tetrahydro phthalic anhydride device is produced in serialization; Comprise reactor drum, flash tank, condensing heat exchanger and associated conduit; It is characterized in that: described reactor drum comprises reactor drum one (11), reactor drum two (12), reactor drum three (13); Flash tank comprises flash tank one (21), flash tank two (22), flash tank three (23); Condensing heat exchanger comprises condensing heat exchanger one (31), condensing heat exchanger two (32), condensing heat exchanger three (33); Said reactor drum one (11), flash tank one (21), reactor drum two (12), flash tank two (22), reactor drum three (13), flash tank three (23) pass through pipe connection successively; Said flash tank one (21) links to each other with condensing heat exchanger one (31), and said flash tank two (22) is connected with condensing heat exchanger two (32) through pipeline, and condensing heat exchanger two (32) links to each other with the import of reactor drum one (11); Said flash tank three (23) is connected with condensing heat exchanger three (33) through pipeline, and condensing heat exchanger three (33) links to each other with the import of reactor drum two (12).
2. thick methyl tetrahydro phthalic anhydride device is produced in serialization according to claim 1, it is characterized in that: described reactor drum is a tubular reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120484315XU CN202465566U (en) | 2011-11-29 | 2011-11-29 | Crude methyl tetrahydrophthalic anhydride continuous production device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120484315XU CN202465566U (en) | 2011-11-29 | 2011-11-29 | Crude methyl tetrahydrophthalic anhydride continuous production device |
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| Publication Number | Publication Date |
|---|---|
| CN202465566U true CN202465566U (en) | 2012-10-03 |
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| CN201120484315XU Expired - Fee Related CN202465566U (en) | 2011-11-29 | 2011-11-29 | Crude methyl tetrahydrophthalic anhydride continuous production device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111732564A (en) * | 2020-06-13 | 2020-10-02 | 嘉兴南洋万事兴化工有限公司 | Method and synthesis system for preparing methyltetrahydrophthalic anhydride |
| CN112661735A (en) * | 2021-01-15 | 2021-04-16 | 浙江正大新材料科技股份有限公司 | Continuous production system and method for methyl tetrahydrophthalic anhydride |
-
2011
- 2011-11-29 CN CN201120484315XU patent/CN202465566U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111732564A (en) * | 2020-06-13 | 2020-10-02 | 嘉兴南洋万事兴化工有限公司 | Method and synthesis system for preparing methyltetrahydrophthalic anhydride |
| CN111732564B (en) * | 2020-06-13 | 2023-06-02 | 嘉兴南洋万事兴化工有限公司 | Method for preparing methyltetrahydrophthalic anhydride and synthesis system |
| CN112661735A (en) * | 2021-01-15 | 2021-04-16 | 浙江正大新材料科技股份有限公司 | Continuous production system and method for methyl tetrahydrophthalic anhydride |
| CN112661735B (en) * | 2021-01-15 | 2023-12-22 | 浙江正大新材料科技股份有限公司 | Continuous production system and method for methyltetrahydrophthalic anhydride |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LEI HAO Free format text: FORMER OWNER: HANGZHOU ZHONGTAI DEEP CRYOGENIC TECHNOLOGY CO., LTD. Effective date: 20150806 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150806 Address after: 310004 No. 16 Chao Wang Road, Xiacheng District, Zhejiang, Hangzhou Patentee after: Lei Hao Address before: 311402, 228, Golf Road, East State Street, Fuyang, Zhejiang, Hangzhou Patentee before: Hangzhou Zhongtai Cryogenic Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20151129 |
|
| EXPY | Termination of patent right or utility model |