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WO2001058559A1 - Colonne de separation de melanges composes d'au moins trois composantes - Google Patents

Colonne de separation de melanges composes d'au moins trois composantes Download PDF

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Publication number
WO2001058559A1
WO2001058559A1 PCT/EP2001/000880 EP0100880W WO0158559A1 WO 2001058559 A1 WO2001058559 A1 WO 2001058559A1 EP 0100880 W EP0100880 W EP 0100880W WO 0158559 A1 WO0158559 A1 WO 0158559A1
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WO
WIPO (PCT)
Prior art keywords
column
steam
inlet
liquid
cooling
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.)
Ceased
Application number
PCT/EP2001/000880
Other languages
German (de)
English (en)
Inventor
Peter Manfred Roth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Axiva GmbH and Co KG
Original Assignee
Siemens Axiva GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens Axiva GmbH and Co KG filed Critical Siemens Axiva GmbH and Co KG
Publication of WO2001058559A1 publication Critical patent/WO2001058559A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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

Definitions

  • the invention relates to a column (1) for separating a mixture of at least three different components (A, B, C ... n), comprising a first
  • FIGS. 5-26 and 5-27 column sequences for the complete separation of 3 and multi-substance mixtures are shown. For everyone shown here
  • n-1 columns are required for the complete separation of n components.
  • reaction mixtures are formed that consist of at least 3 different substances. Typical examples of such
  • Production is esterification plants for alcohols or plants for the production of ethers by dehydration of alcohols.
  • reaction mixtures obtained here have both heavier and lower-boiling impurities.
  • the boiling point of the product of value therefore lies between the boiling points of the
  • Impurities that usually have to be separated from the product of value by distillation are often very volatile substances such as. B. carbon dioxide and on the other hand very low volatility substances such as high molecular weight by-products.
  • the proportion of the high-boiling component can be kept as small as desired.
  • the low-boiling component on the other hand, will always be present in the valuable product because it must be removed above the side deduction. If you deduct the valuable product as a side deduction below the inlet, the proportion of the low-boiling component can be kept as small as desired.
  • the high-boiling component on the other hand, will always be present in the valuable product because it has to be removed below the side deduction.
  • a catch plate for the liquid is attached above the cooling elements and, in the operating state, this is completely or partially introduced into the mass transfer elements below the cooling element.
  • Below the Heating elements are fitted with a steaming base for the rising steam or the rising vapors and this is completely or partially introduced into the material exchange elements above the heating element.
  • the invention therefore relates to a column for separating a mixture of at least three different components, comprising a first one
  • Heating element for the column bottom which is arranged in the column bottom or connected to it
  • a first cooling element for the column head which is arranged in the column top or connected to it
  • an inlet for the multi-substance mixture and one or more side draws
  • the column between the first heating element and the first cooling element and below the or each side draw has one or more further heating or cooling elements for evaporation or condensation, which are either arranged in the column or connected to it, that above the or each further cooling element a collecting tray for downwards flowing liquid is arranged, which thereby and by means of a bypass completely or partially in the
  • Mass transfer zone below the or each cooling element can be introduced, and that a steam floor is arranged below the or each further heating element for collecting rising vapors, which can thereby be completely or partially introduced into the mass transfer zone above the or each further heating element by means of a bypass, so that about the or everyone
  • the column can have both heating and cooling elements and only further heating or only further cooling elements.
  • Evaporation of the outflowing liquid takes place and this results in an internal vapor flow, the side discharge takes place at the point of partial evaporation, either an evaporator is attached to the bottom of the column and in this the steam rising in the column is generated or, alternatively, a suitable stream from the outside (e.g. stripping steam) is introduced.
  • a suitable stream from the outside e.g. stripping steam
  • the feed can be introduced into the column in gaseous, liquid or partially evaporated form.
  • the lightest volatile fraction is usually taken off at the top of the column and the heaviest-boiling fraction at the bottom of the column.
  • Side streams can be taken from anywhere in the column.
  • the feed (components A, B, C ... n) is introduced with the aid of a suitable inlet device 2 between the column head 3 and a first collecting tray 8 located underneath.
  • a suitable inlet device 2 between the column head 3 and a first collecting tray 8 located underneath.
  • An extreme case is in this case the introduction of the feed to the column top or directly into a top condenser 5 (first cooling element) possible via a
  • Line 4 is connected to column 3.
  • a further condenser 9 (further heating or cooling element) is attached below the tray 8 inside the column 1 or outside. This is where the (usually) partial condensation of the vapors rising at this point in the column takes place.
  • the condensate obtained is partially or completely as an internal reflux R 2 via a suitable
  • Component B is then removed from capacitor 9 according to the invention via a side draw.
  • the removal can take place both as a liquid or as a vapor.
  • the purity of the side trigger can be simple Be influenced by the amount of internal reflux R 2 generated in the condenser 9 (e.g. by the amount of coolant).
  • the lightest volatile component A is drawn off either in vapor or liquid form at the top condenser 5.
  • the condensate accumulating in the condenser 5 is partly or completely passed as a reflux Ri via a suitable distributor device 6 to the uppermost mass transfer elements 7.
  • the purity of the current A can be influenced by the amount of the reflux Ri.
  • the reflux Ri can also be realized by a suitable liquid supplied from the outside.
  • So-called chimney floors or also so-called lamella collectors for fillers and / or packings are preferably suitable as the collecting base 8.
  • the liquid can be removed from the downcomer in a particularly simple manner.
  • the bypass 12 can be designed as an external pipeline with a siphon or as a line in the column jacket with immersion. All types of heat exchangers such as tube exchangers, plate exchangers, spiral exchangers, lamella exchangers, block exchangers, ring groove exchangers etc. can be used as condensers 5, 9.
  • Mass exchange elements 7 are used, such as packing, orderly sheet metal and fabric packings, or even bottoms such as sieve bottoms, valve bottoms or bell bottoms.
  • heat exchangers such as tube exchangers, block-ring groove exchangers and plate exchangers are suitable as evaporators 10 etc. but also thin film evaporators or stirred tanks.
  • All common distributor trays such as spout distributors, pipe distributors, duct distributors, element distributors, etc. for packing and packing columns are suitable as distribution devices for liquids 6. If the mass transfer elements are soils, the liquid is applied to the through a suitable inlet pipe, for example
  • the inlet (components A, B, C ... n) is introduced with the aid of a suitable inlet device 2 between the column bottom 11 and a first steam plate 16 located above it.
  • the inlet can be introduced via the column bottom or , directly into the evaporator 10.
  • an evaporator 17 is fitted inside the column 1 or outside. This is where the (as a rule) partial evaporation of those running off at this point in the column takes place
  • the remaining liquid is passed partially or completely via a siphon 13 as an internal return line R n via a suitable distributor device 6 into the mass transfer elements 7 located below.
  • the side draw n-1 is then removed from the evaporator 17.
  • the side trigger can be removed as a liquid or as a vapor. The purity of the
  • the lightest volatile component A is drawn off either in vapor or liquid form at the top condenser 5.
  • Condensate is partially or completely passed as reflux R * ⁇ via a suitable distributor device 6 to the uppermost mass transfer elements 7.
  • the purity of the current A can be influenced by the amount of the reflux Ri.
  • the reflux Ri can also be realized by a suitable liquid supplied from the outside.
  • the so-called steam trays 16 serve the purpose of rising from the bottom of the column
  • the steam floor 16 can also be provided with a defined opening and then acts like an orifice: part of the rising steam flows through said orifice, while the rest flows through the bypass line.
  • the said evaporators 17 can also be attached outside the column, in that the liquid on the steam tray is led to the evaporator via a pipeline and the steam generated there is introduced into the column above the steam tray.
  • the steam floor is preferably additionally equipped with an overflow siphon 13. Via this siphon, the liquid can be led through the steam plate from the upper to the lower part of the column.
  • an evaporator can be installed in a particularly simple manner in the downcomer, the remaining liquid can then flow down via the siphon.
  • the bypass 14 can be designed as an external pipe or as a pipe guided in the column jacket.
  • Spiral exchanger lamella exchanger, block exchanger, ring groove exchanger etc. can be used.
  • customary mass exchange elements 6 can be used, such as packing, ordered sheet metal and fabric packings or also trays such as sieve trays, valve trays or bubble trays.
  • all conventional types such as are suitable as evaporators 10
  • the lightest volatile component A 1 is generally drawn off either in vapor or liquid form at the top condenser 5.
  • the condensate obtained in the condenser is partly or completely passed as reflux Ri via a suitable distributor device 6 to the uppermost mass transfer elements 7.
  • the purity of the stream A1 can be influenced by the amount of the reflux Ri.
  • the reflux Ri can also be realized by a suitable liquid supplied from the outside.
  • a condenser 9 is attached below the tray 8 inside or outside the column. This is where the (usually) partial condensation of the vapors rising at this point in the column takes place.
  • the condensate obtained is partially or completely as internal reflux R 2 via a suitable distributor device 6 in the ones below Mass transfer elements 7 passed.
  • the side draw Bi is then removed from the first condenser 9 below the inlet point 2.
  • the side trigger can be removed as a liquid or as a vapor.
  • the purity of the side draw can be influenced in a simple manner by the amount of internal reflux R 2 generated in the condenser 9 (e.g. by the
  • the so-called steam trays 16 serve to guide the steam rising from the bottom of the column into the bypass lines 14 and at the same time to form a liquid space for the evaporator 17.
  • a bottom forms a gas-side closure of the column section in question, without this creating a separate pressure chamber (the individual column sections are connected via the bypass line).
  • all of the steam is led through the bypass line.
  • the steam floor can also be provided with a defined hole and then acts like an orifice: part of the rising steam flows through said orifice hole while the rest flows through the bypass line.
  • the said evaporators can also be attached outside the column, in that the liquid on the vapor plate is led to the evaporator via a pipeline and the steam generated there is introduced into the column above the vapor plate.
  • the steam floor is preferably additionally equipped with an overflow siphon 13. Via this siphon, the liquid can be led through the steam plate from the upper to the lower part of the column.
  • an evaporator can be installed in a particularly simple manner in the downcomer, the remaining liquid can then flow downward via the siphon.
  • the Bypass 12, 14 can be designed as an external pipe or as a pipe guided in the column jacket. All types such as tube exchangers, plate exchangers, spiral ashes, lamella exchangers, block exchangers, ring groove exchangers etc. can be used as evaporators 10, 17.
  • Lamellar collector for packing and / or packings.
  • the liquid can be removed from the downcomer in a particularly simple manner.
  • the bypass 12 can be designed as an external pipeline with a siphon or as a line in the column jacket with immersion.
  • condenser 9 5 all types such as tube exchangers, plate exchangers,
  • Spiral exchanger lamella exchanger, block exchanger, ring groove exchanger etc. can be used.
  • all customary mass exchange elements 7 can be used, such as packing, ordered sheet metal and fabric packings or also trays such as sieve trays, valve trays or bubble trays.
  • all conventional types such as are suitable as evaporators 10
  • tray 1 has 40 trays (separation stages). The following mixtures were fed into tray 2 from above (the components are arranged according to their boiling points):
  • Mixture 1 was liquid and had the following composition:
  • Mixture 2 was in vapor form and had the following composition
  • Carbon dioxide is the lightest volatile component, .... water is the hardest boiling component.
  • the column was operated isobarically (viewed from pressure losses) at 10 bar, abs.
  • a column according to FIG. 3 also had 40 trays (separation stages). On
  • Mixture 1 was liquid and had the following composition:
  • Mixture 2 was in vapor form and had the following composition:
  • Carbon dioxide is the lightest volatile component, .... water is the hardest boiling component.
  • the column was operated isobarically (viewed from pressure losses) at 9.2 bar, abs.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

L'invention concerne une colonne (1) destinée à la séparation d'un mélange composé d'au moins trois composantes différentes (A, B, C ...n). Cette colonne présente un premier moyen de chauffage (10) destiné au pied de colonne (11) dans lequel il est placé ou auquel il est raccordé ; un premier moyen de refroidissement (5) destiné à la tête de colonne (3) dans laquelle il est placé ou à laquelle il est relié ; une conduite d'arrivée (2) destinée au mélange et au moins une conduite d'évacuation latérale (n-1).
PCT/EP2001/000880 2000-02-09 2001-01-27 Colonne de separation de melanges composes d'au moins trois composantes Ceased WO2001058559A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10005750.0 2000-02-09
DE2000105750 DE10005750C2 (de) 2000-02-09 2000-02-09 Kolonne zur Trennung von Gemischen, welche aus mindestens 3 unterschiedlichen Komponenten bestehen

Publications (1)

Publication Number Publication Date
WO2001058559A1 true WO2001058559A1 (fr) 2001-08-16

Family

ID=7630364

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/000880 Ceased WO2001058559A1 (fr) 2000-02-09 2001-01-27 Colonne de separation de melanges composes d'au moins trois composantes

Country Status (2)

Country Link
DE (1) DE10005750C2 (fr)
WO (1) WO2001058559A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2269998A3 (fr) * 2004-08-19 2011-03-30 DSM IP Assets B.V. Procédé pour la rectification de mélanges de produits utiles sensibles à l'air et/ou a la température a haut point d'ébullition

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016204256A1 (de) 2016-03-15 2017-09-21 Evonik Degussa Gmbh Prozessintensivierung des Hydroformylierungs-Verfahrens

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2113130A (en) * 1935-08-17 1938-04-05 Socony Vacuum Oil Co Inc Method of distillation
US3085998A (en) * 1959-09-23 1963-04-16 Exxon Research Engineering Co Dehydration of polymerization diluent
DE1769805A1 (de) * 1968-07-17 1970-08-27 Gerlach Dipl Ing Richard Verfahren zur Rektifikation von Zweistoffgemischen
US3536610A (en) * 1967-12-07 1970-10-27 Lummus Co Fractionation process
DE2330374A1 (de) * 1973-06-14 1975-01-16 Stone & Webster Eng Corp Zweidruck-fraktionierturm und -verfahren
DE19516658A1 (de) * 1995-02-07 1996-08-08 Linde Ag Verfahren zur Beschleunigung chemischer Reaktionen in der Flüssigphase
DE19631332A1 (de) * 1996-05-21 1997-11-27 Linde Ag Entfernung störender Komponenten aus dem Lösemittelkreislauf von Gaswäschen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2113130A (en) * 1935-08-17 1938-04-05 Socony Vacuum Oil Co Inc Method of distillation
US3085998A (en) * 1959-09-23 1963-04-16 Exxon Research Engineering Co Dehydration of polymerization diluent
US3536610A (en) * 1967-12-07 1970-10-27 Lummus Co Fractionation process
DE1769805A1 (de) * 1968-07-17 1970-08-27 Gerlach Dipl Ing Richard Verfahren zur Rektifikation von Zweistoffgemischen
DE2330374A1 (de) * 1973-06-14 1975-01-16 Stone & Webster Eng Corp Zweidruck-fraktionierturm und -verfahren
DE19516658A1 (de) * 1995-02-07 1996-08-08 Linde Ag Verfahren zur Beschleunigung chemischer Reaktionen in der Flüssigphase
DE19631332A1 (de) * 1996-05-21 1997-11-27 Linde Ag Entfernung störender Komponenten aus dem Lösemittelkreislauf von Gaswäschen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2269998A3 (fr) * 2004-08-19 2011-03-30 DSM IP Assets B.V. Procédé pour la rectification de mélanges de produits utiles sensibles à l'air et/ou a la température a haut point d'ébullition
US8747621B2 (en) 2004-08-19 2014-06-10 Dsm Ip Assets B.V. Process for the rectification of mixtures of high-boiling air- and/or temperature-sensitive useful products

Also Published As

Publication number Publication date
DE10005750C2 (de) 2002-01-17
DE10005750A1 (de) 2001-08-23

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