WO2015113747A1 - Verdünnung der reaktanden einer oxidativen dehydrierung von alkanen mit kohlendioxid - Google Patents
Verdünnung der reaktanden einer oxidativen dehydrierung von alkanen mit kohlendioxid Download PDFInfo
- Publication number
- WO2015113747A1 WO2015113747A1 PCT/EP2015/000122 EP2015000122W WO2015113747A1 WO 2015113747 A1 WO2015113747 A1 WO 2015113747A1 EP 2015000122 W EP2015000122 W EP 2015000122W WO 2015113747 A1 WO2015113747 A1 WO 2015113747A1
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- WIPO (PCT)
- Prior art keywords
- product stream
- reactor
- ethane
- separation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
- C07C5/42—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with a hydrogen acceptor
- C07C5/48—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with a hydrogen acceptor with oxygen as an acceptor
Definitions
- the invention relates to a process for the oxidative dehydrogenation (ODH) of an alkane to the corresponding alkene, in particular ethane to ethylene, in which an insert is provided in a reactor having at least alkane and an oxygen-containing oxidant, wherein the alkane in the presence of a
- Catalyst is converted by oxidative dehydrogenation with oxygen in the reactor to a gaseous product stream having the corresponding alkene.
- the separation of water may be by condensation, while the separation of nitrogen typically requires low temperatures, i.e., the provision of appropriate refrigeration capacity and the necessary equipment (e.g., refrigeration cycle, distillation).
- Water on the other hand, can easily be separated at moderate temperatures. The released energy can, to some degree, re-evaporate water and generate steam
- the water vapor thus generated is generally not sufficient to provide a sufficient amount of diluent, so that additional diluent must be used and / or at least additional energy must be provided.
- the present invention is therefore an object of the invention to provide a method for the ODH of alkanes, that is less expensive in terms of equipment complexity. This object is achieved by a method having the features of claim 1.
- a diluent comprising at least C0 2 is provided as constituent of the insert, furthermore the oxygen for the partial oxidation of the alkane (in particular ethane) according to (here, for example, ethane)
- Ethanfeed is provided.
- the alkene or ethylene can be further oxidized in side reactions to CO and C0 2 and CO to C0 2 .
- at least stoichiometric or superstoichiometric addition of the oxygen is prevented that formed in the ODH C0 2 acts as an oxidizing agent.
- the CO2 acts according to the invention as a diluent and does not or only in very minor importance as an oxidant in the reaction in part.
- the resulting during the reaction by the complete oxidation C0 2 is separated and as
- the diluent preferably consists entirely or at least to a significant extent of C0 2 .
- Total feed stream in the range of 5 vol.% To 90 vol .-%, preferably from 25 vol .-% to 75 vol .-% and particularly preferably from 40 vol .-% to 60 vol .-% for an isothermally operated reactor.
- the proportion of the diluent in the total feed stream in the range of 50 vol.% To 95 vol .-%, preferably from 60 vol .-% to 90 vol .-% and particularly preferably from 70 vol .-% bis 85% by volume for an adiabatically operated reactor.
- the diluent preferably contains 10 to 100% by volume C0 2 , preferably 20 to 100% by volume C0 2 , particularly preferably 40 to 100% by volume C0 2 , the remainder, if present, in each case consisting of H 2 O and / or N 2 consists or has these components.
- H 2 O and N 2 can be used in any ratio.
- the upper limit for C0 2 in the diluent is in particular 20% by volume, preferably 40% by volume and more preferably 80% by volume.
- oxygen as the oxidant at least stoichiometrically or in stoichiometric excess in the ODH reaction in particular, the ratio of oxygen to freshly supplied alkane, in particular to freshly fed ethane in the use in the range of 0.50-1.1 (with the units: mol of 0 2 / mol of ethane), preferably of 0.53 -1 (mol 0 2 / mol ethane) and more preferably in the range of 0.55-0.9 (mol 0 2 / mol ethane).
- an ethane recycle in the ratio of 1/1 to 4/1 (the ratio is thus as Ethanrecycle to fresh Ethandefiniert), preferably 1/2 to 3/1 (ethane recycle / ethane fresh) and more preferably 0 to 2 / 1 (Ethan recycle / Ethan fresh) returned.
- fresh ethane or alkane is to be understood as ethane or alkane, which is fed into the reactor for the first time.
- the ethane cycle is formed by the recycling of unreacted ethane.
- C0 2 present in the product stream is separated off and recycled as a diluent into the reactor.
- C0 2 is a by-product of the ODH reaction itself and can be externally fed in at the beginning of the process or when starting the plant.
- the C0 2 can be easily removed from the product stream in a wash (eg Rectisol or amine wash) and returned to the process.
- a wash eg Rectisol or amine wash
- the still to be separated from the product stream of the hydrocarbons contained therein components are thus only the resulting CO and the residual oxygen 0 second
- the waste heat of the ODH reaction can also be used to advantage for the regeneration of C0 2 scrubbing.
- H 2 O is separated or separated from the product stream upstream of the separation of CO 2 from the product stream (in particular in a separator), the separated H 2 O preferably being converted into steam by means of a steam generator is recycled and in particular as a diluent in the reactor or otherwise used, for example as process steam.
- oxidation preferably a catalytic oxidation (also referred to as CATOX) in C0 2
- CATOX catalytic oxidation
- catalysts such as platinum and palladium can be used.
- Oxygen may also be harmful to washes (depending on the wash medium used). An oxidation unit thus reduces the risk of
- upstream of the separation of C0 2 from the product stream of the product stream is compressed, in particular the
- Compression occurs downstream of the deposition of H 2 0 from the product stream, in particular downstream or upstream of the (in particular catalytic) oxidation for the conversion of CO to C0 2 in the gaseous product stream. Furthermore, it is preferably provided that upstream of the separation of C0 2 from the product stream, a further separation of H 2 0 takes place from the product stream, in particular downstream of the compression of the C0 2 and in particular downstream of the above-mentioned optionally catalytic oxidation. Separated or separated H 2 0 (eg by means of a separator) can in turn be converted into steam by means of a steam generator and in particular returned to the reactor or otherwise used, for example as process steam.
- the product stream is recompressed or compressed for the first time (see below).
- downstream of the compression of the product stream which is carried out downstream of the separation of C0 2 from the product stream, 0 2 and in particular CO and / or N 2 (depending on the oxidant used) separated from the product stream, in particular 0 2 and in particular CO in the reactor
- Nitrogen which in the use of air or
- oxygen-enriched air is obtained as the oxidizing agent is preferably not returned to the reactor.
- the alkene, in particular ethylene, in the product stream contained alkane
- the product flow of the reactor can be compressed either twice or via two compressors or only once or via a compressor.
- the gaseous product stream is compressed from the product stream before the separation of CO 2 (see above).
- An ODH of ethane to ethylene is called the
- the gaseous product stream in the first stage is preferably densified as far as it is for the separation or
- the first compression or the first compressor can be dispensed with and the described second compression or the second one
- Compressor becomes mandatory.
- Compression is necessary or a two-stage compression is provided.
- pure oxygen is used as the oxidizing agent in the process according to the invention.
- air or oxygen-enriched air is used as the oxidant.
- the nitrogen is then preferably separated from the product stream in a rectification column and preferably not recycled to the reactor.
- FIG. 1 is a schematic representation of a first embodiment of the invention
- Fig. 2 is a schematic representation of a second embodiment of the
- Fig. 5 is a schematic representation of a fifth embodiment of
- FIG. 1 shows a first embodiment of the process according to the invention in which ethane is reacted with oxygen in an oxidative dehydrogenation to form ethylene in a reactor 1, in which gaseous product stream P formed, in addition to ethylene, ethane, CO, CO 2 , H 2 O, and Oxygen is included.
- the invention will be described herein with reference to the ODH of ethane.
- Other alkanes can be dehydrogenated analogously oxidative.
- the ODH takes place in the reactor 1, for example at a pressure in the range from 0.5 bar to 25 bar, preferably from 1 bar to 15 bar and more preferably from 3 bar to 10 bar in the presence of a suitable catalyst (see also below).
- the separated H 2 O can optionally be vaporized in a steam generator 9 and returned to the reactor 1 or otherwise used.
- the steam generator can use waste heat from the ODH to generate steam.
- the gaseous, dried product stream P is introduced from the separator 2 in a compressor 3 and compressed and then placed again in a separator 4 to separate H 2 0 from the product stream P. Separated H 2 O can in turn be supplied to the steam generator 9 and returned as water vapor in the reactor 1 or otherwise used.
- C0 2 contained in the product stream P is subsequently separated off from the product stream P, for example by means of a wash, and according to the invention into the reactor 1 as
- FIG. 2 shows a variant of the method according to FIG. 1, in which, in contrast to FIG. 1, downstream of the H 2 O deposition 2 and downstream of the compression 3 of FIG
- Product stream P is carried out a catalytic oxidation 20, in the
- Product P contained CO is converted to C0 2 , which is additionally removed in the laundry 5 from the product stream P and is recycled to the reactor 1 as a diluent. Furthermore, this eliminates the distance 7 of 0 2 and CO from the product stream, as indicated in Figure 2, in particular if 0 2 and CO are removed in the CATOX so far that they are not in the ethylene product and in the separation part disturb more.
- Figure 3 shows a further variant of the method according to the invention, in which, in contrast to Figure 1 or 2, no compression between the two
- Oxidation 20 in which CO contained in the product stream P is converted to C0 2 , which is additionally removed in the wash 5 from the product stream P and recycled to the reactor 1. Furthermore, this variant provides that air or
- oxygen-enriched air is added as an oxidizing agent in the reactor 1, wherein N 2 is preferably removed cryogenically in a rectification column 7 but is not returned to the reactor 1.
- Oxygen-enriched air may be provided via a PSA (pressure swing adsorption) in a known manner.
- FIG. 4 shows a further variant of the method according to the invention, in which, unlike FIG. 3, no catalytic oxidation 20 is carried out. Not fully reacted CO is then separated 7 after compaction 6 next to 0 2 and N 2 from the product stream P before it is placed in the C2 splitter 8.
- Fig. 5 shows a further embodiment of the invention
- a metal oxide catalyst comprising the elements Mo, V, Te, Nb used.
- This may be, for example, a MoV a Te Nb c O x catalyst, a being preferably in the range from 0.05 to 0.4, and b preferably being in the range from 0.02 to 0.2, and wherein c is preferably in the range of 0.05 to 0.3.
- x is the molar number of oxygen that binds to the metal atoms of the catalyst, which follows from the relative amount and valence of the metal elements.
- Mo Mo s Va p Te b q Nb c O x
- Mo can be present in the oxidation state +5 as well as in the oxidation state +6.
- V can be present in the oxidation state +4 and +5, depending on the position in the crystal.
- Niobium is present in the +5 oxidation state.
- Tellurium is present in the oxidation state +4.
- the reactor 1 described in the embodiments can be executed both isothermally and adiabatically.
- Feed compositions (feed stream E):
- the WHSV weight hourly space velocity
- the WHSV is preferably in the range of 1.0 kg to 40 kg C 2 H 6 / h / kg cat, preferably in the range of 2 kg to 25 kg C 2 H 6 / h / kg cat, particularly preferably in the range of 5 kg to 20 kg C 2 H 6 / h / kg cat.
- pressure in the reactor device 1 of 0.5 bar to 25 bar, preferably 1 bar to 15 bar, particularly preferably 3 bar to 10 bar.
- Feed compositions feed stream E:
- the WHSV is preferably in the range of 2.0 kg to 50 kg C 2 H 6 / h / kgKat, preferably in the range of 5kg to 30 kg C 2 H 6 / h / kgKat, more preferably in the range of 10 kg to 25 kg C. 2 H 6 / h / kg cat.
- the proportion of an intermaterial added to the catalyst on the fixed bed can be up to 90% by volume; it is preferably from 30% by volume to 85% by volume, particularly preferably from 50% by volume to 75% by volume.
- a following optional second or further fixed bed can be carried out without inert material.
- the apparatus structure can be simplified, since a lesser effort is incurred in the decomposition part. Possibly. can be dispensed with a demethanizer (N 2 - and CO removal) 7. A C0 2 separation from the product is necessary anyway.
- the regeneration of the detergent can advantageously be effected by waste heat of the reactor 1.
- the described CATOX 20 causes a synergistic effect.
- the CATOX 20 increases the C0 2 content for the inert gas cycle (C0 2 ), wherein furthermore a rectification column for CO / C 2 separation is dispensable due to the conversion of CO to C0 2 .
- additional oxygen removal or reduction means a reduction in detergent degeneration when using e.g.
- Reaction 1 are returned.
- Steam is typically used to minimize the N 2 cycle. In the present case can be completely dispensed with steam 9a.
- the steam generation 9 can be done by the waste heat of the reactor 1 and by the cooling of the product stream P (about 400 ° C).
- the waiver of steam 9a as a dilution medium has the following advantages:
- the vapor 9a can be exported, the steam 9a can be used in the decomposition part as a heat transfer, it can be completely dispensed with evaporator.
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2015213170A AU2015213170A1 (en) | 2014-01-30 | 2015-01-22 | Dilution of the reactants of an oxidative dehydrogenation of alkanes with carbon dioxide |
EP15701098.4A EP3099653A1 (de) | 2014-01-30 | 2015-01-22 | Verdünnung der reaktanden einer oxidativen dehydrierung von alkanen mit kohlendioxid |
US15/110,186 US20160326070A1 (en) | 2014-01-30 | 2015-01-22 | Diluting alkane oxydehydrogenation reactants with carbon dioxide |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14000346.8 | 2014-01-30 | ||
EP14000346 | 2014-01-30 |
Publications (1)
Publication Number | Publication Date |
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WO2015113747A1 true WO2015113747A1 (de) | 2015-08-06 |
Family
ID=50031135
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2015/000122 WO2015113747A1 (de) | 2014-01-30 | 2015-01-22 | Verdünnung der reaktanden einer oxidativen dehydrierung von alkanen mit kohlendioxid |
Country Status (4)
Country | Link |
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US (1) | US20160326070A1 (de) |
EP (1) | EP3099653A1 (de) |
AU (1) | AU2015213170A1 (de) |
WO (1) | WO2015113747A1 (de) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3318545A1 (de) * | 2016-11-03 | 2018-05-09 | Linde Aktiengesellschaft | Verfahren und anlage zur herstellung von olefinen |
CN109689600A (zh) * | 2016-08-02 | 2019-04-26 | 国际壳牌研究有限公司 | 乙烯生产方法和化工联合体 |
CN111032601A (zh) * | 2017-08-16 | 2020-04-17 | 国际壳牌研究有限公司 | 乙烷氧化脱氢 |
EP3708558A1 (de) | 2019-03-15 | 2020-09-16 | Linde GmbH | Verfahren und anlage zur herstellung eines oder mehrerer olefine |
EP3708557A1 (de) | 2019-03-15 | 2020-09-16 | Linde GmbH | Verfahren und anlage zur herstellung eines oder mehrerer olefine |
WO2020187572A1 (de) | 2019-03-15 | 2020-09-24 | Linde Gmbh | Verfahren und anlage zur herstellung eines oder mehrerer olefine |
EP4015495A1 (de) | 2020-12-18 | 2022-06-22 | Linde GmbH | Verfahren und anlage zur herstellung einer zielverbindung |
WO2023247188A1 (en) | 2022-06-23 | 2023-12-28 | Sabic Global Technologies B.V. | Production of ethylene via oxidative dehydrogenation of ethane |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL3585761T3 (pl) | 2017-02-22 | 2021-05-17 | Shell Internationale Research Maatschappij B.V. | Oczyszczanie gazu dla odcieku z utleniającego odwodornienia alkanu |
PE20200730A1 (es) | 2017-08-16 | 2020-07-23 | Shell Int Research | Deshidrogenacion oxidativa del etano |
WO2019175731A1 (en) * | 2018-03-13 | 2019-09-19 | Nova Chemicals (International) S.A. | Mitigating oxygen, carbon dioxide and/or acetylene output from an odh process |
CN110963880A (zh) * | 2018-09-28 | 2020-04-07 | 中国科学院大连化学物理研究所 | 二氧化碳作为原料气稀释剂的乙烷氧化制乙烯工艺方法 |
PL3873876T3 (pl) | 2018-11-02 | 2023-12-27 | Shell Internationale Research Maatschappij B.V. | Wytwarzanie etylenu przez odwodornienie oksydacyjne etanu |
BR112021009809A2 (pt) * | 2018-12-11 | 2021-08-17 | Shell Internationale Research Maatschappij B.V. | processo da desidrogenação oxidativa de um alcano contendo 2 a 6 átomos de carbono e/ou da oxidação de um alceno contendo 2 a 6 átomos de carbono |
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US4410752A (en) * | 1980-07-10 | 1983-10-18 | The Standard Oil Company | Process for the oxydehydrogenation of ethane to ethylene |
US20010025129A1 (en) * | 1999-02-22 | 2001-09-27 | Symyx Technologies, Inc. | Processes for oxidative dehyrogenation |
Family Cites Families (3)
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US5905180A (en) * | 1996-01-22 | 1999-05-18 | Regents Of The University Of Minnesota | Catalytic oxidative dehydrogenation process and catalyst |
US20080177117A1 (en) * | 2006-10-16 | 2008-07-24 | Abraham Benderly | Integrated catalytic process for converting alkanes to alkenes and catalysts useful for same |
EP2165997A1 (de) * | 2008-09-18 | 2010-03-24 | Rohm and Haas Company | Verbessertes Verfahren zur oxidativen Dehydrierung von Ethan |
-
2015
- 2015-01-22 WO PCT/EP2015/000122 patent/WO2015113747A1/de active Application Filing
- 2015-01-22 AU AU2015213170A patent/AU2015213170A1/en not_active Abandoned
- 2015-01-22 US US15/110,186 patent/US20160326070A1/en not_active Abandoned
- 2015-01-22 EP EP15701098.4A patent/EP3099653A1/de not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US4410752A (en) * | 1980-07-10 | 1983-10-18 | The Standard Oil Company | Process for the oxydehydrogenation of ethane to ethylene |
US20010025129A1 (en) * | 1999-02-22 | 2001-09-27 | Symyx Technologies, Inc. | Processes for oxidative dehyrogenation |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109689600A (zh) * | 2016-08-02 | 2019-04-26 | 国际壳牌研究有限公司 | 乙烯生产方法和化工联合体 |
US11014860B2 (en) | 2016-11-03 | 2021-05-25 | Linde Aktiengesellschaft | Method and system for producing olefins |
WO2018082945A1 (de) * | 2016-11-03 | 2018-05-11 | Linde Aktiengesellschaft | Verfahren und anlage zur herstellung von olefinen |
CN110167905A (zh) * | 2016-11-03 | 2019-08-23 | 林德股份公司 | 生产烯烃的方法和系统 |
EP3318545A1 (de) * | 2016-11-03 | 2018-05-09 | Linde Aktiengesellschaft | Verfahren und anlage zur herstellung von olefinen |
CN110167905B (zh) * | 2016-11-03 | 2021-11-16 | 林德股份公司 | 生产烯烃的方法和系统 |
EA038191B1 (ru) * | 2016-11-03 | 2021-07-21 | Линде Акциенгезельшафт | Способ и установка для производства олефинов |
CN111032601A (zh) * | 2017-08-16 | 2020-04-17 | 国际壳牌研究有限公司 | 乙烷氧化脱氢 |
WO2020187572A1 (de) | 2019-03-15 | 2020-09-24 | Linde Gmbh | Verfahren und anlage zur herstellung eines oder mehrerer olefine |
EP3708557A1 (de) | 2019-03-15 | 2020-09-16 | Linde GmbH | Verfahren und anlage zur herstellung eines oder mehrerer olefine |
CN113574039A (zh) * | 2019-03-15 | 2021-10-29 | 林德有限责任公司 | 用于生产一种或多种烯烃的方法和系统 |
EP3708558A1 (de) | 2019-03-15 | 2020-09-16 | Linde GmbH | Verfahren und anlage zur herstellung eines oder mehrerer olefine |
US11560344B2 (en) | 2019-03-15 | 2023-01-24 | Linde Gmbh | Method and system for producing one or more olefins |
EP4015495A1 (de) | 2020-12-18 | 2022-06-22 | Linde GmbH | Verfahren und anlage zur herstellung einer zielverbindung |
WO2022129575A1 (de) | 2020-12-18 | 2022-06-23 | Linde Gmbh | Verfahren und anlage zur herstellung einer zielverbindung |
WO2023247188A1 (en) | 2022-06-23 | 2023-12-28 | Sabic Global Technologies B.V. | Production of ethylene via oxidative dehydrogenation of ethane |
Also Published As
Publication number | Publication date |
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US20160326070A1 (en) | 2016-11-10 |
EP3099653A1 (de) | 2016-12-07 |
AU2015213170A1 (en) | 2016-07-14 |
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