DE102005056100A1 - Propane dehydrogenation comprises producing and compressing a raw gas, pre-cooling compressed gas, cryogenically fractionating gas, removing remainder gas as product, conducting feedback stream from cryogenic unit to compressor stage - Google Patents

Propane dehydrogenation comprises producing and compressing a raw gas, pre-cooling compressed gas, cryogenically fractionating gas, removing remainder gas as product, conducting feedback stream from cryogenic unit to compressor stage Download PDF

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Publication number
DE102005056100A1
DE102005056100A1 DE102005056100A DE102005056100A DE102005056100A1 DE 102005056100 A1 DE102005056100 A1 DE 102005056100A1 DE 102005056100 A DE102005056100 A DE 102005056100A DE 102005056100 A DE102005056100 A DE 102005056100A DE 102005056100 A1 DE102005056100 A1 DE 102005056100A1
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gas
raw gas
compressor stage
cooling
low
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DE102005056100A
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German (de)
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Heinz BÖLT
Thomas Hecht
Peter Ulbrich
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Linde GmbH
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Linde GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0204—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the feed stream
    • F25J3/0219—Refinery gas, cracking gas, coke oven gas, gaseous mixtures containing aliphatic unsaturated CnHm or gaseous mixtures of undefined nature
    • 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
    • C07C5/32—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen
    • C07C5/327—Formation of non-aromatic carbon-to-carbon double bonds only
    • C07C5/333—Catalytic processes
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/09—Purification; Separation; Use of additives by fractional condensation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0242—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 3 carbon atoms or more
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0252—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of hydrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/04—Mixing or blending of fluids with the feed stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/12—Refinery or petrochemical off-gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/30—Compression of the feed stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/02—Recycle of a stream in general, e.g. a by-pass stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/02—Internal refrigeration with liquid vaporising loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/12—External refrigeration with liquid vaporising loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/60—Closed external refrigeration cycle with single component refrigerant [SCR], e.g. C1-, C2- or C3-hydrocarbons

Abstract

Propane dehydrogenation comprises producing a raw gas; compressing the raw gas in a compressor stage; pre-cooling the compressed raw gas in a pre-cooler; cryogenically fractionating the raw gas, removing a remainder gas as product and a feedback stream from the cryogenic unit, its cooling capacity is made available for the cooling of the raw gas, and conducting the feedback stream to the compressor stage. An independent claim is included for a plant for propane dehydrogenation comprising dehydrogenation reactors, the compressor stage (1), the pre-cooler (2) and the cryogenic unit (3), where the cryogenic unit exhibits a discharge (4) for remainder gas as product, is connected with the compressor stage over a feedback line, where the connection is intended for a stream (5), which is fed from the cryogenic unit back into the compressor stage and makes its cooling capacity available in the cryogenic unit for cooling of the raw gas.

Description

Die vorliegende Erfindung betrifft ein Verfahren zur Propan-Dehydrierung, das folgende Schritte aufweist:

  • a) Erzeugung eines Rohgases
  • b) Verdichtung von Rohgas in einer Verdichterstufe,
  • c) Vorkühlung des verdichteten Rohgases im Vorkühler,
  • d) Tieftemperaturzerlegung des Rohgases, bei der ein Restgas (tailgas) als Produkt entnommen wird.
The present invention relates to a process for propane dehydrogenation which comprises the following steps:
  • a) Generation of a raw gas
  • b) compression of raw gas in a compressor stage,
  • c) precooling of the compressed raw gas in the precooler,
  • d) Cryogenic decomposition of the raw gas, in which a residual gas (tail gas) is taken as product.

Desweiteren betrifft die vorliegende Erfindung eine Anlage zur Propan-Dehydrierung mit Dehydrierreaktoren, einer Verdichterstufe zur Verdichtung von Rohgas, einem Vorkühler zur Vorkühlung des verdichteten Rohgases und einem Tieftemperaturteil zur Tieftemperaturzerlegung des Rohgases, wobei der Tieftemperaturteil eine Entnahme für Restgas (tailgas) als Produkt aufweist.Furthermore The present invention relates to a plant for propane dehydrogenation with dehydrogenation reactors, a compressor stage for the compression of Raw gas, a precooler for precooling the compressed crude gas and a low-temperature part for cryogenic decomposition the raw gas, the cryogenic part is a withdrawal for residual gas (Tailgas) as a product.

Bekannt sind Verfahren zur Propan-Dehydrierung beispielsweise in Zusammenhang mit der Polypropylenherstellung, bei denen Propan über eine Propan-Dehydrierung in Propylen umgewandelt wird. Das Propylen wird im Anschluss daran in einer Polymerisationsanlage zu Polypropylen polymerisiert.Known For example, methods of propane dehydrogenation are related with the polypropylene manufacturing, where propane is about a propane dehydrogenation is converted to propylene. The propylene is subsequently added polymerized in a polymerization plant to polypropylene.

Um für den C3-Gehalt im wasserstoffreichen Restgas (tailgas), der die Propan-Dehydrier-Stufe als Produkt verlässt, einen akzeptabel niedrigen Wert zu erreichen, muss das eingesetzte Rohgas auf sehr niedrige Temperaturen abgekühlt werden. In einer herkömmlichen Propan-Dehydrier-Stufe wird das üblicherweise durch eine Kombination eines C3-Kältekreislaufs mit einer, meist mehrstufigen, Expansionsmaschine bewerkstelligt. Der Einsatz einer solchen Expansionsmaschine ist in der Regel kostenintensiv, sowohl hinsichtlich der Investitions- wie auch der Wartungskosten.Around for the C3 content in hydrogen-rich residual gas (tailgas), the product of the propane dehydrogenation step leaves, To achieve an acceptably low value, the used Crude gas can be cooled to very low temperatures. In a conventional Propane dehydrogenation stage will be the usual by a combination of a C3 refrigeration cycle with one, usually multi-stage, expansion machine accomplished. The use of a Such an expansion machine is usually costly, both in terms of investment as well as maintenance costs.

Aufgabe der vorliegenden Erfindung ist es, ein gegenüber dem Stand der Technik vereinfachtes und kostengünstigeres Verfahren zur Propan-Dehydrierung zur Verfügung zu stellen.task It is the object of the present invention to simplify and simplify over the prior art cheaper To provide methods for propane dehydrogenation.

Die gestellte Aufgabe wird verfahrensseitig dadurch gelöst, dass ein Strom aus dem Tieftemperaturteil entnommen, dort zur Abkühlung des Rohgases eingesetzt und dann zur Verdichterstufe zurückgeführt wird. Durch die vorliegende Erfindung kommt die Propan-Dehydrierung ohne die eingangs beschriebene Expansionsmaschine aus. Dies stellt einen großen Vorteil dar, da das Verfahren dadurch wesentlich vereinfacht und kostengünstiger gestaltet wird. Die Wirtschaftlichkeit wird dadurch vorteilhaft erhöht. Darüberhinaus ist die Störanfälligkeit einer erfindungsgemäßen Propan-Dehydrier-Stufe gegenüber dem Stand der Technik deutlich reduziert. Die zur Trennung von C3 vom wasserstoffreichen Dehydrierprodukt erforderliche sehr niedrige Temperatur bei hohem Druck wird durch die Kälteleistung des Rücklaufstroms erreicht. Die Verdichterstufe sorgt gleichzeitig für das Erreichen des geforderten hohen Drucks.The posed task is procedurally solved by that taken a stream from the low temperature part, there to cool the Used raw gas and then returned to the compressor stage. By the present invention, the propane dehydrogenation comes without the expansion machine described above. This constitutes one huge Advantage is because the process significantly simplifies and cost-effective is designed. The economy is thereby advantageously increased. Furthermore is the susceptibility a propane dehydrogenation stage according to the invention over the State of the art significantly reduced. The separation of C3 from hydrogen-rich dehydrogenation product required very low Temperature at high pressure is determined by the cooling capacity of the return flow reached. The compressor stage simultaneously ensures that it is reached the demanded high pressure.

Bevorzugt erfolgt die Abkühlung des Rohgases in zwei Schritten, wobei in einem ersten Schritt das Rohgas auf ca. –35°C abgekühlt wird und in einem zweiten Schritt das Rohgas auf eine Temperatur im Bereich von –70 bis –90°C abgekühlt wird. Beispielsweise wird zur Abkühlung des Rohgases im ersten Schritt ein C3-Kältekreislauf eingesetzt und die Kälteleistung für den zweiten Schritt dem Rückführstrom entnommen.Prefers the cooling takes place of the raw gas in two steps, wherein in a first step the Crude gas is cooled to about -35 ° C and in a second step, the raw gas to a temperature in the range from -70 is cooled to -90 ° C. For example, it will cool down of the raw gas in the first step, a C3 refrigeration cycle used and the cooling capacity for the second step the recycle stream taken.

Gemäß einer vorteilhaften Ausgestaltung der Erfindung wird der Rückführstrom im Tieftemperaturteil entspannt und anschließend der Verdichterstufe zugeführt. Dadurch kann das Temperaturniveau bei der Kälteabgabe abgesenkt werden.According to one advantageous embodiment of the invention, the recycle stream relaxed in the low temperature part and then fed to the compressor stage. Thereby The temperature level can be lowered during the cooling release.

Eine Weiterbildung des Erfindungsgedankens sieht vor, dass dem Rückführstrom vor Abgabe der Kälteleistung ein wasserstoffreicher oder methanreicher Strom zugemischt wird.A Development of the inventive concept provides that the recycle stream before delivery of the cooling capacity a hydrogen-rich or methane-rich stream is added.

Vorrichtungsseitig wird die gestellte Aufgabe dadurch gelöst, dass der Tieftemperaturteil über eine Rückführungsleitung mit der Verdichterstufe in Verbindung steht, die für einen Strom vorgesehen ist, der aus dem Tieftemperaturteil in die Verdichterstufe zurückgeführt wird und im Tieftemperaturteil eine Kälteleistung zur Abkühlung des Rohgases zur Verfügung stellt.the device side the object is achieved in that the low-temperature part via a return line communicates with the compressor stage, which is for a Electricity is provided from the low-temperature part in the compressor stage is returned and in the cryogenic part, a cooling capacity to cool down of the raw gas provides.

Die Erfindung sowie weitere Ausgestaltungen der Erfindung werden im Folgenden anhand des in der Figur dargestellten Ausführungsbeispiels näher erläutert.The Invention and further embodiments of the invention are in Below with reference to the embodiment shown in the figure explained in more detail.

Die Figur zeigt schematisch eine Propan-Dehydrier-Anlage mit einer Verdichterstufe 1, einem Vorkühler 2 und einem Tieftemperaturteil 3. Das wasserstoffreiche Restgas (Tailgas) verlässt über eine Produktleitung 4 den Tieftemperaturteil 3. Über eine Rückführungsleitung 5 wird ein Strom aus dem Tieftemperaturteil in die Verdichterstufe zurückgeführt, der in der Lage ist, eine Kälteleistung zur Verfügung zu stellen, und im Tieftemperaturteil (3) zur Abkühlung des Rohgases eingesetzt wird. Das Rohgas wird über eine Rohgaszuführung 6 in die Verdichterstufe eingebracht.The figure shows schematically a propane dehydrogenation plant with a compressor stage 1 , a precooler 2 and a low temperature part 3 , The hydrogen-rich residual gas (tail gas) leaves via a product line 4 the low temperature part 3 , About a return line 5 a stream from the low-temperature part is returned to the compressor stage, which is able to provide a cooling capacity, and in the low-temperature part ( 3 ) is used to cool the raw gas. The raw gas is supplied via a raw gas feed 6 introduced into the compressor stage.

Claims (5)

Verfahren zur Propan-Dehydrierung, das folgende Schritte aufweist: a) Erzeugung eines Rohgases b) Verdichtung von Rohgas in einer Verdichterstufe (1), c) Vorkühlung des verdichteten Rohgases im Vorkühler (2), e) Tieftemperaturzerlegung (3) des Rohgases, bei der ein Restgas (tailgas) (4) als Produkt entnommen wird, dadurch gekennzeichnet, dass ein Rückführstrom (5) aus dem Tieftemperaturteil (3) entnommen wird, dort eine Kälteleistung zur Abkühlung des Rohgases zur Verfügung stellt, und dann zur Verdichterstufe zurückgeführt wird.Process for propane dehydrogenation, comprising the following steps: a) production of a raw gas b) compression of raw gas in a compressor stage ( 1 ), c) precooling of the compressed raw gas in the precooler ( 2 ), e) Cryogenic decomposition ( 3 ) of the raw gas at which a residual gas (tailgas) ( 4 ) is taken as a product, characterized in that a recycle stream ( 5 ) from the low-temperature part ( 3 ), there is a cooling capacity for cooling the raw gas is available, and then returned to the compressor stage. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Abkühlung des Rohgases in zwei Schritten erfolgt, wobei in einem ersten Schritt das Rohgas auf ca. –35°C abgekühlt wird und in einem zweiten Schritt das Rohgas auf eine Temperatur im Bereich von –70 bis –90°C abgekühlt wird.Method according to claim 1, characterized in that that cooling off of the raw gas takes place in two steps, wherein in a first step the crude gas is cooled to about -35 ° C and in a second step, the raw gas to a temperature in the range from -70 is cooled to -90 ° C. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Rückführstrom im Tieftemperaturteil entspannt und anschließend der Verdichterstufe zugeführt wird.Method according to claim 1 or 2, characterized that the recycle stream relaxed in the low temperature part and then the compressor stage is supplied. Verfahren nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass dem Rückführstrom vor Abgabe der Kälteleistung ein wasserstoffreicher oder methanreicher Strom zugemischt wird.Method according to claim 1, 2 or 3, characterized that the recycle stream before delivery of the cooling capacity a hydrogen-rich or methane-rich stream is added. Anlage zur Propan-Dehydrierung mit Dehydrierreaktoren, einer Verdichterstufe (1) zur Verdichtung von Rohgas, einem Vorkühler (2) zur Vorkühlung des verdichteten Rohgases und einem Tieftemperaturteil (3) zur Tieftemperaturzerlegung des Rohgases, wobei der Tieftemperaturteil (3) eine Entnahme (4) für Restgas (tailgas) als Produkt aufweist, dadurch gekennzeichnet, dass der Tieftemperaturteil (3) über eine Rückführungsleitung (5) mit der Verdichterstufe (1) in Verbindung steht, die für einen Strom (5) vorgesehen ist, der aus dem Tieftemperaturteil (3) in die Verdichterstufe (1) zurückgeführt wird und im Tieftemperaturteil (3) eine Kälteleistung zur Abkühlung des Rohgases zur Verfügung stellt.Plant for propane dehydrogenation with dehydrogenation reactors, one compressor stage ( 1 ) for the compression of raw gas, a precooler ( 2 ) for precooling the compressed raw gas and a low-temperature part ( 3 ) for cryogenic decomposition of the raw gas, wherein the low-temperature part ( 3 ) a withdrawal ( 4 ) for residual gas (tail gas) as a product, characterized in that the low-temperature part ( 3 ) via a return line ( 5 ) with the compressor stage ( 1 ) that is responsible for a stream ( 5 ) provided from the low-temperature part ( 3 ) in the compressor stage ( 1 ) and in the low-temperature part ( 3 ) provides a cooling capacity for cooling the raw gas.
DE102005056100A 2005-11-17 2005-11-24 Propane dehydrogenation comprises producing and compressing a raw gas, pre-cooling compressed gas, cryogenically fractionating gas, removing remainder gas as product, conducting feedback stream from cryogenic unit to compressor stage Withdrawn DE102005056100A1 (en)

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DE102005056100A DE102005056100A1 (en) 2005-11-17 2005-11-24 Propane dehydrogenation comprises producing and compressing a raw gas, pre-cooling compressed gas, cryogenically fractionating gas, removing remainder gas as product, conducting feedback stream from cryogenic unit to compressor stage

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DE102005054895 2005-11-17
DE102005054895.4 2005-11-17
DE102005056100A DE102005056100A1 (en) 2005-11-17 2005-11-24 Propane dehydrogenation comprises producing and compressing a raw gas, pre-cooling compressed gas, cryogenically fractionating gas, removing remainder gas as product, conducting feedback stream from cryogenic unit to compressor stage

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113121299A (en) * 2020-01-15 2021-07-16 浙江卫星能源有限公司 Cryogenic separation process for preparing propylene by propane dehydrogenation in Olflex process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113121299A (en) * 2020-01-15 2021-07-16 浙江卫星能源有限公司 Cryogenic separation process for preparing propylene by propane dehydrogenation in Olflex process
CN113121299B (en) * 2020-01-15 2022-12-20 浙江卫星能源有限公司 Cryogenic separation process for preparing propylene by propane dehydrogenation in Oleflex process

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