WO2003011469A2 - Verbesserter fallfilmverdampfer zur auftrennung von stoffgemischen - Google Patents
Verbesserter fallfilmverdampfer zur auftrennung von stoffgemischen Download PDFInfo
- Publication number
- WO2003011469A2 WO2003011469A2 PCT/EP2002/007609 EP0207609W WO03011469A2 WO 2003011469 A2 WO2003011469 A2 WO 2003011469A2 EP 0207609 W EP0207609 W EP 0207609W WO 03011469 A2 WO03011469 A2 WO 03011469A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- film evaporator
- falling film
- vapor space
- heat exchanger
- substances
- Prior art date
Links
- 239000011552 falling film Substances 0.000 title claims abstract description 37
- 239000000203 mixture Substances 0.000 title claims abstract description 31
- 239000000126 substance Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 claims description 16
- 238000000926 separation method Methods 0.000 claims description 15
- 238000009833 condensation Methods 0.000 claims description 10
- 230000005494 condensation Effects 0.000 claims description 10
- 239000007792 gaseous phase Substances 0.000 claims description 5
- ZAKOWWREFLAJOT-CEFNRUSXSA-N D-alpha-tocopherylacetate Chemical compound CC(=O)OC1=C(C)C(C)=C2O[C@@](CCC[C@H](C)CCC[C@H](C)CCCC(C)C)(C)CCC2=C1C ZAKOWWREFLAJOT-CEFNRUSXSA-N 0.000 description 18
- ZAKOWWREFLAJOT-UHFFFAOYSA-N d-alpha-Tocopheryl acetate Natural products CC(=O)OC1=C(C)C(C)=C2OC(CCCC(C)CCCC(C)CCCC(C)C)(C)CCC2=C1C ZAKOWWREFLAJOT-UHFFFAOYSA-N 0.000 description 17
- 239000000047 product Substances 0.000 description 17
- 229940042585 tocopherol acetate Drugs 0.000 description 17
- 239000000463 material Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- GVJHHUAWPYXKBD-UHFFFAOYSA-N (±)-α-Tocopherol Chemical compound OC1=C(C)C(C)=C2OC(CCCC(C)CCCC(C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010327 methods by industry Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000009666 routine test Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229930003427 Vitamin E Natural products 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- WIGCFUFOHFEKBI-UHFFFAOYSA-N gamma-tocopherol Natural products CC(C)CCCC(C)CCCC(C)CCCC1CCC2C(C)C(O)C(C)C(C)C2O1 WIGCFUFOHFEKBI-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229940046009 vitamin E Drugs 0.000 description 1
- 235000019165 vitamin E Nutrition 0.000 description 1
- 239000011709 vitamin E Substances 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/06—Evaporators with vertical tubes
- B01D1/065—Evaporators with vertical tubes by film evaporating
Definitions
- Falling film evaporators are described, for example, in Billet, R.: Verdampfung 20 and their technical applications, Verlag Chemie Weinheim, 1981. Falling film evaporators are usually used to separate temperature-sensitive fluid mixtures, to concentrate solutions, etc. As a rule, falling film evaporators are used at pressures up to approx. 20 bar, in the vacuum range up to approx. 25 50 mbar. At lower pressures, the use of falling film evaporators is usually restricted, since due to the pressure loss occurring in the pipes, in the downstream vapor space and in the condenser system, the process engineering and economic outlay for the downstream vacuum system 30 increases significantly. However, these complex apparatuses are significantly more expensive in terms of investment and operation and lead to a process-technically complex process.
- the heat exchanger (s) arranged in the vapor space - hereinafter generally referred to as the heat exchanger system - advantageously brings about partial or complete condensation of the vapors directly in the vapor space of the falling film evaporator. This eliminates external piping to external condenser systems, which leads to significantly reduced pressure losses in the overall system consisting of falling film evaporator and condenser system.
- the heat exchanger system is located directly in the upper part of the vapor space. It consists of two plate capacitors (9, 11), which are separated from each other by the separating plate (10).
- the two-stage arrangement of the heat exchanger system advantageously enables partial condensation of mixtures of substances of different composition and removal of the fractions via lines (12), (13). Depending on the separation task at hand, the material flows thus obtained can be sent to the corresponding further processing.
- the residual vapor is drawn off via line (14) and vacuum system (15).
- the heat exchanger system integrated in the vapor space of the falling film evaporator has one or preferably a plurality of heat exchangers. If several heat exchangers are used, different fractions from the vapor withdrawn can be partially condensed by operating the heat exchanger appropriately.
- the condensate streams obtained in this way are preferably discharged separately and passed to corresponding further processing stages.
- Suitable heat exchangers are, for example, pipe coils or pipe bundles installed in the vapor space; plate heat exchangers are preferably used. Because of their relatively high heat transfer numbers and at the same time small pressure losses, these offer high performance and also open up the possibility of specifically adjusting the operating conditions of the individual partial condensers.
- the plate heat exchangers can be provided for condensation in cocurrent or countercurrent, depending on the process engineering task. The specific operating conditions depend on the respective material system and the separation requirements. They can be determined by the specialist through routine tests.
- the number of heat exchangers used is generally not limited, preferably two or three are used. However, more heat exchangers can also be used. As already described, it can be particularly advisable to position the sump vent separately from the vapor space.
- an overflow weir is installed in the vapor space, which completely or partially prevents backmixing of the liquid flowing out of the tubes of the falling film evaporator with the product stream flowing into the vapor space.
- the mixture of substances to be separated is fed to a falling film evaporator.
- a gaseous phase vapors
- a heated heat exchanger is used to expelled from the mixture of substances.
- Plate heat exchangers are preferably used in the process. These are particularly effective in the separation performance and also make it possible to achieve specific results with regard to partial condensation by means of specific operating specifications.
- the respective concrete specifications depend on the material system and the separation task and can be determined by the expert through routine tests.
- one or preferably more heat exchangers are used for the condensation. It is advisable to separate the respective condensate flows. It may be particularly advisable to design the process in such a way that the suction hood is positioned separately from the vapor space.
- the method according to the invention is particularly suitable for operations at relatively low pressures. In general, it is suitable for pressures of approximately 1 mbar to 20 bar, preferably 3 mbar to 1 bar.
- a large number of substance mixtures can be separated using the device according to the invention and the method according to the invention.
- mixtures which are sensitive to temperature and which, in addition to the product of value, contain components which, because of their concentration or the position of the phase equilibrium, boil closely to the product of value are particularly suitable. In such mixtures, partial evaporation leads to a partial transition of the product of value into the vapor stream.
- the device according to the invention can effectively minimize the losses in the valuable product.
- One example that can be mentioned here is the separation of low boilers from a material stream containing vitamin E acetate, which boil closely to the valuable product vitamin E acate.
- VEA loss 2.5% based on the incoming amount of VEA.
- the composition of the incoming product stream was 2.6% low boilers, 94.1% VEA, 1.2% high boilers and 2.1% isomers of the VEA.
- the outlet temperature of the product stream running out of the tube bundle was set to 243 ° C. at a pressure of 3 mbar.
- the outlet temperature at the first condenser was set to 180 ° C, the temperature for almost complete condensation of the remaining vapors was 150 ° C.
- the analysis of the material flow occurring at the first capacitor showed the following Composition: 13.5% low boilers, 83.9% VEA, 2.6% isomers of the VEA.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02764652A EP1412042A2 (de) | 2001-07-21 | 2002-07-09 | Verbesserter fallfilmverdampfer zur auftrennung von stoffgemischen |
AU2002328860A AU2002328860A1 (en) | 2001-07-21 | 2002-07-09 | Improved falling-film evaporator for separating substance mixtures |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10135716.8 | 2001-07-21 | ||
DE2001135716 DE10135716A1 (de) | 2001-07-21 | 2001-07-21 | Verbesserter Fallfilmverdampfer zur Auftrennung von Stoffgemischen |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003011469A2 true WO2003011469A2 (de) | 2003-02-13 |
WO2003011469A3 WO2003011469A3 (de) | 2003-04-17 |
Family
ID=7692726
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/007609 WO2003011469A2 (de) | 2001-07-21 | 2002-07-09 | Verbesserter fallfilmverdampfer zur auftrennung von stoffgemischen |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1412042A2 (de) |
AU (1) | AU2002328860A1 (de) |
DE (1) | DE10135716A1 (de) |
WO (1) | WO2003011469A2 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100350209C (zh) * | 2005-11-10 | 2007-11-21 | 上海交通大学 | 降膜型滚压强化管束蒸发换热器 |
KR20110092326A (ko) * | 2008-11-27 | 2011-08-17 | 바스프 에스이 | 증류에 의한 분리 장치 |
DE102010026835B4 (de) * | 2010-07-11 | 2014-07-10 | Air Liquide Global E&C Solutions Germany Gmbh | Verfahren zur Destillation von temperaturempfindlichen Flüssigkeiten |
EP4327906A1 (de) * | 2022-08-26 | 2024-02-28 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Vorrichtung mit integriertem kondensator und abscheider |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL35201C (de) * | 1932-12-20 | |||
DE2953534A1 (de) * | 1978-09-21 | 1981-04-02 | L.Givaudan & Cie. S.A., Vernier-Genève | Fraktionierverfahren und -vorrichtung |
DE19602640A1 (de) * | 1996-01-25 | 1997-07-31 | Basf Ag | Verfahren und Verdampfer zur Verdampfung oxidationsempfindlicher Verbindungen |
NL1013682C2 (nl) * | 1999-11-26 | 2001-05-30 | Purac Biochem Bv | Werkwijze en inrichting voor het zuiveren van een waterige oplossing van melkzuur. |
-
2001
- 2001-07-21 DE DE2001135716 patent/DE10135716A1/de not_active Withdrawn
-
2002
- 2002-07-09 EP EP02764652A patent/EP1412042A2/de not_active Withdrawn
- 2002-07-09 AU AU2002328860A patent/AU2002328860A1/en not_active Abandoned
- 2002-07-09 WO PCT/EP2002/007609 patent/WO2003011469A2/de not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
WO2003011469A3 (de) | 2003-04-17 |
AU2002328860A1 (en) | 2003-02-17 |
EP1412042A2 (de) | 2004-04-28 |
DE10135716A1 (de) | 2003-02-06 |
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