WO2012065703A1 - Verfahren zur entfernung schwersiedender kohlenwasserstoffe aus lösungsmittelströmen - Google Patents
Verfahren zur entfernung schwersiedender kohlenwasserstoffe aus lösungsmittelströmen Download PDFInfo
- Publication number
- WO2012065703A1 WO2012065703A1 PCT/EP2011/005676 EP2011005676W WO2012065703A1 WO 2012065703 A1 WO2012065703 A1 WO 2012065703A1 EP 2011005676 W EP2011005676 W EP 2011005676W WO 2012065703 A1 WO2012065703 A1 WO 2012065703A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- solvent
- water
- boiling hydrocarbons
- removal
- phase
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/005—Processes comprising at least two steps in series
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/04—Purification; Separation; Use of additives by distillation
- C07C7/05—Purification; Separation; Use of additives by distillation with the aid of auxiliary compounds
- C07C7/08—Purification; Separation; Use of additives by distillation with the aid of auxiliary compounds by extractive distillation
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G21/00—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents
- C10G21/06—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents characterised by the solvent used
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G21/00—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents
- C10G21/28—Recovery of used solvent
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/40—Characteristics of the process deviating from typical ways of processing
- C10G2300/4081—Recycling aspects
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/40—Characteristics of the process deviating from typical ways of processing
- C10G2300/44—Solvents
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/80—Additives
- C10G2300/805—Water
Definitions
- the invention relates to a process for the removal of high-boiling hydrocarbons from water-soluble solvent streams, these solvent streams incurred in industrial processes, which lead a solvent as a process component in a circle, and the solvent must be periodically or permanently freed of high-boiling hydrocarbons, the quality or undesirably affect desired properties of the solvent, and water is added to perform the process in a phase separator, whereby the heavy hydrocarbons are separated because of their immiscibility with water, and then recycled the water and solvent-containing and water-miscible phase in the process ,
- the proportion of high-boiling hydrocarbons can be kept permanently low in circulating solvents in an industrial process.
- solvents for execution, wherein the solvents are solid components of the process, which are circulated and needed because of their properties for the reaction.
- Typical processes include extractive distillation and gas purification processes. Since the solvents are frequently used for the purification of hydrocarbon-containing feedstocks, existing high-boiling hydrocarbon constituents from the feed mixture accumulate in the solvent streams. Often they affect their properties in an undesirable manner.
- EP 0329958 A2 describes a process for preparing an aromatics concentrate suitable for use as a blending component for carburettor fuels, wherein feedstock hydrocarbon mixtures whose boiling range is substantially between 40 ° C and 170 ° C, without prior separation into individual fractions of an extractive distillation using N-substituted morpholines whose substituents have not more than seven carbon atoms are subjected as a selective solvent, so that the low-boiling non-aromatics with a boiling range up to about 105 ° C virtually completely and the higher-boiling non-aromatics with a boiling range between about 105 ° C and 160 ° C for the most part obtained as a raffinate, while the aromatics, which are used in whole or in part as a blending component, incurred in the extract of the extractive distillation, and the Schweraromatenabtrennung from the solvent while a partial flow of the recirculated water is added to the solvent and the heavy
- WO 2009043753 A1 teaches a process for the production of aromatic hydrocarbons selected from benzene, toluene, xylene, and ethylbenzene and mixtures thereof, from a hydrocarbon mixture, which also contains non-aromatic hydrocarbons and high boilers, wherein as a purification step for the aromatic hydrocarbons an extractive distillation is provided with an extractive solvent, and for separating the unwanted high-boiling constituents, a partial stream is separated from the extractive solvent, and the substream of the extractive solvent is extracted with water, so that a substantially free from high boiling aqueous extract phase and an organic phase containing the High boilers are obtained, and the aqueous extract phase for the recovery of the extractive solvent is distilled in purified form, so that the extractive solvent is recycled to the extractive distillation, and wherein prior to carrying out the extraction of the substream with water, a distillation is carried out in which a fraction of very high boiling hydrocarbons is separated from the substream of the
- the process has the property that the extractive solvent must be distilled for recovery or must be expensively discharged from the process. This is associated with high costs.
- the additional distillation step to remove the high boiling hydrocarbons from the extractive solvent prior to the addition of water causes additional energy costs. It would therefore be advantageous to provide a method which separates the high-boiling hydrocarbons by adding water into a substream of an extracting solvent by forming second phases, the high-boiling and water-insoluble hydrocarbons by separation of the insoluble in water organic Phase, and the further workup of the water-soluble phase or the water-immiscible phase by distillation is unnecessary.
- the distillations mentioned in the prior art are characterized by a high expenditure of energy and influence the economy of the process in a negative way.
- the invention solves this problem by a method which separates from the industrial process, which uses a solvent to be cleaned of heavy hydrocarbons, a partial flow, this partial flow provides with water, the mixing ratio with the water so provides that the formation of two not phases which are miscible with one another, performs a phase separation which removes water-immiscible phase with the undesired high-boiling components, which recirculates the water-miscible phase with the solvent in the process, wherein the recycling is designed so that further purification of the solvent is not required ,
- Typical processes in which the process according to the invention is used are extractive distillations or gas scrubbing with absorbing solvents.
- the water-containing phase which contains a large part of the solvent after the phase separation, depending on the miscibility, is returned to the process without further purification, wherein the recycle ratio is chosen so that the permissible water concentration in the solvent is not exceeded.
- the water introduced into the solvent circuit since water is a low boiler, is discharged via one of the process steps present in the solvent cycle as a function of time. In an extractive distillation this can be exemplified by regenerative distillation. By means of this procedure, the water concentration in the process can be kept permanently low.
- a method for the removal of high-boiling hydrocarbons from water-soluble solvent streams in an industrial process wherein A partial stream is taken from a solvent enriched with high-boiling hydrocarbons, which is led into a container, and
- Water is added to this partial stream of solvent so that an aqueous and a nonaqueous phase are formed, and
- the container can be arbitrary. This may be a simple container suitable for separation and separation of immiscible phases, but it may also be an extractor which carries out both phases separately, and optionally interposing the water-miscible phase, around this phase in appropriate concentration to be able to trace back into the process.
- the container may also be a phase separator or additional phase separators may be interposed prior to initiation into the process to achieve complete phase separation.
- the process for the removal of high-boiling hydrocarbons from water-soluble solvent streams is exemplified by an extractive distillation.
- the process for removing high boiling point hydrocarbons from solvent streams is a process for gas scrubbing to separate unwanted gases from a gas mixture.
- An example of a suitable process for extractive distillation is EP 0792928 B1.
- An example of a suitable process for gas scrubbing is EP 1606041 B1.
- the water is added in an amount which allows a good phase separation, which is typically added to the solvent partial stream in the container in an amount of 5 to 90 wt .-%.
- a cooler On the container for phase separation sits in one embodiment of the invention, a cooler. Thereby For example, the temperature may be lowered to achieve efficient removal of the high boiling hydrocarbons.
- a heater On the container for phase separation can sit for the same purpose a heater.
- the water concentration of the liberated from high-boiling hydrocarbons solvent immediately after recycling in the process 0.5 to 5 wt .-%.
- the water concentration of the solvent released from high-boiling hydrocarbons immediately after recirculation into the process is 1 to 2% by weight.
- the water-containing phase is continuously metered into the solvent circuit during the return to the solvent process, so that the water concentration in the solvent released from the high-boiling hydrocarbons amounts to less than 0.5% by weight immediately after recycling to the process. is.
- the added water is supplied to the solvent circuit and discharged according to the invention over time in the further course of the process over the solvent cycle already existing process steps. If it is an extractive distillation, the excess water is typically withdrawn via the top fraction of the regeneration column to remove the solvent ("stripping column"). The removal of the water after recycling into the solvent process thus takes place through the distillation columns or regeneration columns present in the extractive distillation ,
- the excess water is conveniently taken up by the usually dry feed gas.
- the feed gas supplied to the bottom of the absorption column takes in countercurrent, theoretically, the water contained in the solvent, which is added to the top of the absorption column to the saturation limit, and thus the water-enriched product gas leaves the absorption column Head.
- the removal of the water after the return in the solvent process thus takes place by means of a flowing through the absorption column dry feed gas stream.
- the invention has the advantage of allowing a simple separation of high-boiling substances from solvent mixtures, without an energy-consuming and thus economically unfavorable distillation of solvent is required.
- the water content of the solvent in the process is kept low by appropriate means, and the heavies and hydrocarbons are discharged from the process. As a result, the properties of the solvent over the service life of the process are largely retained.
- FIG. Figure 1 shows an extractive distillation equipped with water addition and phase separation tanks.
- FIG. Figure 2 shows a gas scrubber equipped with water addition and phase separation tanks.
- FIG. 1 shows the process flow for the extractive distillation of a hydrocarbon mixture in which the hydrocarbon-containing feed mixture (1) is fed onto a column (2) for extractive distillation.
- the extractive distillation column (2) is equipped with a reboiler (2a).
- a stream (3a) is obtained which is enriched with light distillation products.
- the product is returned via a reflux vessel (4) and a reflux pump (5) in the head of the extractive distillation column.
- a partial stream (3b) which also contains the discharged water in low concentration, is taken as product.
- a distillation bottoms stream (3c) enriched in aromatic and heavier hydrocarbons is obtained, which also contains the extracting solvent.
- This stream (11) is fed via a pump (12), a side reboiler (13) for partial evaporation of the solvent in the extractive distillation column, a heat exchanger for preheating the feed mixture (1a), and a cooler (14) back into the extractive distillation column (2) ,
- a partial stream (15) of the cooled solvent stream is branched off via a valve (16) and placed in a phase separation vessel (17) where water (18) is added. This results in the formation of two immiscible phases (19a, 19b).
- the lighter phase (19a) typically contains the heavier hydrocarbons and is separated and removed from the process (20a). This can be further processed as needed or used for heating purposes, for example.
- the heavier phase (19b) containing the purified solvent is also separated (20b) and returned to the process by means of a pump (21) via the valve (22) with the untreated partial flow (12a) (22a).
- FIG. Figure 2 shows a process for gas scrubbing which contacts a feed gas (23) with an absorbing solvent in an absorption column (24), thereby liberating the feed gas (23) from undesired sour gases. This gives a purified product gas (25) for further use.
- the absorbed sour gas is carried out in a mixture with the absorbing solvent (26) from the absorption column (24) and led into a cascade of "flash" containers (27a-c).
- a partial stream of regenerated solvent (29a) is diverted via a valve (16) and into a phase separation vessel (17), where water (18) is added to give two phases (19a, 19b)
- the lighter phase (19a) is separated and removed from the process (20a), which can be further processed or added, as needed
- the heavier phase (19b) is separated (20b) and optionally by means of a pump (30) via the valve (22) in the absorption column (24) as a purified Solvent returned (22a).
- the transport of the regenerated solvent (22b) to the top of the Absorption column is effected by a circulation pump (12).
- the phase separation vessel (17) is cooled here with a cooler (17a).
- an analyzer (31) for determining the water concentration.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2817854A CA2817854A1 (en) | 2010-11-16 | 2011-11-11 | Process for the removal of high-boiling hydrocarbons from solvent streams |
BR112013012047A BR112013012047A2 (pt) | 2010-11-16 | 2011-11-11 | ''processo para a remoção de hidrocarbonetos de alto ponto de ebulição de correntes de solventes solúvel em água'' |
EP11794400.9A EP2640680A1 (de) | 2010-11-16 | 2011-11-11 | Verfahren zur entfernung schwersiedender kohlenwasserstoffe aus lösungsmittelströmen |
RU2013124950/04A RU2013124950A (ru) | 2010-11-16 | 2011-11-11 | Способ удаления высококипящих углеводородов из потоков растворителя |
US13/885,935 US9249069B2 (en) | 2010-11-16 | 2011-11-11 | Method for removing high-boiling hydrocarbons from solvent flows |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010051396A DE102010051396A1 (de) | 2010-11-16 | 2010-11-16 | Verfahren zur Entfernung schwersiedender Kohlenwasserstoffe aus Lösungsmittelströmen |
DE102010051396.2 | 2010-11-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012065703A1 true WO2012065703A1 (de) | 2012-05-24 |
Family
ID=45319051
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2011/005676 WO2012065703A1 (de) | 2010-11-16 | 2011-11-11 | Verfahren zur entfernung schwersiedender kohlenwasserstoffe aus lösungsmittelströmen |
Country Status (7)
Country | Link |
---|---|
US (1) | US9249069B2 (de) |
EP (1) | EP2640680A1 (de) |
BR (1) | BR112013012047A2 (de) |
CA (1) | CA2817854A1 (de) |
DE (1) | DE102010051396A1 (de) |
RU (1) | RU2013124950A (de) |
WO (1) | WO2012065703A1 (de) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4081355A (en) * | 1970-08-12 | 1978-03-28 | Krupp-Koppers Gmbh | Process for recovering highly pure aromatics from a mixture of aromatics and non-aromatics |
EP0329958A2 (de) | 1988-02-20 | 1989-08-30 | Krupp Koppers GmbH | Verfahren zur Herstellung eines zur Verwendung als Blendingkomponente für Vergaserkraftstoffe geeigneten Aromatenkonzentrates |
US5877385A (en) * | 1996-05-21 | 1999-03-02 | Hfm International, Inc. | Process including extractive distillation and/or dehydrogenation to produce styrene from petroleum feedstock including ethyl-benzene/xylene mixtures |
EP0792928B1 (de) | 1996-02-03 | 2004-03-17 | BASF Aktiengesellschaft | Verfahren zur Gewinnung von Reinaromaten aus Reformatbenzin |
EP1606041B1 (de) | 2003-03-26 | 2008-04-23 | Uhde GmbH | Verfahren zur selektiven entfernung von schwefelwasserstoff und co 2 aus rohgas |
US20090038991A1 (en) * | 2007-08-10 | 2009-02-12 | Kuang Yeu Wu | Extractive distillation process for recovering aromatics from petroleum streams |
WO2009043753A1 (de) | 2007-09-28 | 2009-04-09 | Basf Se | Verfahren zur gewinnung von aromatischen kohlenwasserstoffen aus einem kohlenwasserstoffgemisch |
US20090105514A1 (en) * | 2007-08-10 | 2009-04-23 | Cpc Corporation | Extractive distillation processes using water-soluble extractive solvents |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1808758C3 (de) * | 1968-11-14 | 1974-10-17 | Metallgesellschaft Ag, 6000 Frankfurt | Verfahren zur Abtrennung reiner aromatischer Kohlenwasserstoffe aus Kohlenwasserstoffgemische!! |
DE19631332B4 (de) * | 1996-05-21 | 2005-05-25 | Linde Ag | Verfahren zum Entfernen störender Komponenten aus dem Lösemittelkreislauf von regenerierbaren Absorptionsprozessen |
-
2010
- 2010-11-16 DE DE102010051396A patent/DE102010051396A1/de not_active Withdrawn
-
2011
- 2011-11-11 EP EP11794400.9A patent/EP2640680A1/de not_active Withdrawn
- 2011-11-11 WO PCT/EP2011/005676 patent/WO2012065703A1/de active Application Filing
- 2011-11-11 US US13/885,935 patent/US9249069B2/en active Active
- 2011-11-11 CA CA2817854A patent/CA2817854A1/en not_active Abandoned
- 2011-11-11 RU RU2013124950/04A patent/RU2013124950A/ru not_active Application Discontinuation
- 2011-11-11 BR BR112013012047A patent/BR112013012047A2/pt not_active IP Right Cessation
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4081355A (en) * | 1970-08-12 | 1978-03-28 | Krupp-Koppers Gmbh | Process for recovering highly pure aromatics from a mixture of aromatics and non-aromatics |
EP0329958A2 (de) | 1988-02-20 | 1989-08-30 | Krupp Koppers GmbH | Verfahren zur Herstellung eines zur Verwendung als Blendingkomponente für Vergaserkraftstoffe geeigneten Aromatenkonzentrates |
EP0792928B1 (de) | 1996-02-03 | 2004-03-17 | BASF Aktiengesellschaft | Verfahren zur Gewinnung von Reinaromaten aus Reformatbenzin |
US5877385A (en) * | 1996-05-21 | 1999-03-02 | Hfm International, Inc. | Process including extractive distillation and/or dehydrogenation to produce styrene from petroleum feedstock including ethyl-benzene/xylene mixtures |
EP1606041B1 (de) | 2003-03-26 | 2008-04-23 | Uhde GmbH | Verfahren zur selektiven entfernung von schwefelwasserstoff und co 2 aus rohgas |
US20090038991A1 (en) * | 2007-08-10 | 2009-02-12 | Kuang Yeu Wu | Extractive distillation process for recovering aromatics from petroleum streams |
US20090105514A1 (en) * | 2007-08-10 | 2009-04-23 | Cpc Corporation | Extractive distillation processes using water-soluble extractive solvents |
WO2009043753A1 (de) | 2007-09-28 | 2009-04-09 | Basf Se | Verfahren zur gewinnung von aromatischen kohlenwasserstoffen aus einem kohlenwasserstoffgemisch |
Also Published As
Publication number | Publication date |
---|---|
US9249069B2 (en) | 2016-02-02 |
DE102010051396A1 (de) | 2012-05-16 |
RU2013124950A (ru) | 2014-12-27 |
CA2817854A1 (en) | 2012-05-24 |
US20140323790A1 (en) | 2014-10-30 |
EP2640680A1 (de) | 2013-09-25 |
BR112013012047A2 (pt) | 2019-09-24 |
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