DE1020658B - Process for the production of ethylene by gas separation at low temperatures and equipment to carry out the process - Google Patents
Process for the production of ethylene by gas separation at low temperatures and equipment to carry out the processInfo
- Publication number
- DE1020658B DE1020658B DE1956P0016366 DEP0016366A DE1020658B DE 1020658 B DE1020658 B DE 1020658B DE 1956P0016366 DE1956P0016366 DE 1956P0016366 DE P0016366 A DEP0016366 A DE P0016366A DE 1020658 B DE1020658 B DE 1020658B
- Authority
- DE
- Germany
- Prior art keywords
- adsorption
- ethylene
- gas
- stage
- desorption
- 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.)
- Pending
Links
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 title claims description 25
- 239000005977 Ethylene Substances 0.000 title claims description 25
- 238000000034 method Methods 0.000 title claims description 10
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 238000000926 separation method Methods 0.000 title claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 27
- 238000003795 desorption Methods 0.000 claims description 13
- 229930195733 hydrocarbon Natural products 0.000 claims description 9
- 150000002430 hydrocarbons Chemical class 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 238000000354 decomposition reaction Methods 0.000 claims description 6
- 238000004821 distillation Methods 0.000 claims description 5
- 238000009835 boiling Methods 0.000 claims description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims 2
- 229910002092 carbon dioxide Inorganic materials 0.000 claims 1
- 239000001569 carbon dioxide Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 23
- 230000008929 regeneration Effects 0.000 description 6
- 238000011069 regeneration method Methods 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
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
- C07C7/12—Purification; Separation; Use of additives by adsorption, i.e. purification or separation of hydrocarbons with the aid of solids, e.g. with ion-exchangers
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Separation Of Gases By Adsorption (AREA)
Description
Verfahren für die Gewinnung von äthylen durch Gaszerlegung bei tiefen Temperaturen und Einrichtung zur Durchführung des Verfahrens Bei der Gewinnung von Äthylen aus Rohgasen, bei spielsweise aus Koksofengas oder durch Ölvergasung angereichertem Koksofengas, ist der Äthylengehalt vielfach so gering, daß eine Tieftemperaturzerlegung dieses Rohgases zu hohe Kosten verursacht. Process for the production of ethylene by gas decomposition at depths Temperatures and equipment for carrying out the process In the recovery of Ethylene from raw gases, for example from coke oven gas or enriched by oil gasification Coke oven gas, the ethylene content is often so low that low-temperature decomposition this raw gas causes too high costs.
Es ist bekannt, daß eine gewisse Anreicherung des Äthylengebalts in einer Adsorptionsanlage mittels Aktivkohle erreicht werden kann. Dabei bleiben jedoch in dem Rohgas enthaltene höhere Kohlenwasserstoffe, wie Propan, Propylen, Butan, Butylen und Benzin bzw. Benzolhomologe, von C5 an aufwärts dem Äthylen beigemischt und erschweren die Tieftemperaturzerlegung. It is known that there is some enrichment in the ethylene content can be achieved in an adsorption system using activated carbon. Stick to it however, higher hydrocarbons contained in the raw gas, such as propane, propylene, Butane, butylene and gasoline or benzene homologues, mixed with ethylene from C5 upwards and complicate the low-temperature decomposition.
Um diese Schwierigkeiten zu beseitigen und die Wirtschaftlichkeit zu verbessern, wird erfindungsgemäß vorgeschlagen, eine Steigerung des Äthylen gehalts in dem der Tieftemperaturzerlegung zuzuführenden Gas in der Weise vorzunehmen, daß mittels einer in zwei Stufen durchgeführten Adsorption in der ersten Adsorptionsstufe im wesentlichen die Kohlenwasserstoffe von C3 an aufwärts und in der zweiten Adsorptionsstufe im wesentlichen das Äthylen aus dem Gas entfernt werden. To eliminate these difficulties and increase the economy To improve, it is proposed according to the invention to increase the ethylene content in the gas to be fed to the cryogenic decomposition in such a way that by means of an adsorption carried out in two stages in the first adsorption stage essentially the hydrocarbons from C3 upwards and in the second adsorption stage essentially removing the ethylene from the gas.
Hierbei wird als Desorptionsprodukt der zweiten Adsorptionsstufe ein stark mit Äthylen angereichertes Gas erhalten, dem außerdem die höheren Kohlenwasserstoffe im wesenilichen entzogen sind, so daß die anschließende Zerlegung dieses Produktes bei tiefen Temperaturen unter wirtschaftlichen Bedingungen möglich ist. Here, the second adsorption stage is used as the desorption product a gas strongly enriched with ethylene, which also contains the higher hydrocarbons are essentially withdrawn, so that the subsequent dismantling of this product is possible at low temperatures under economic conditions.
Da sich nicht vermeiden läßt, daß in der ersten Adsorptionsstufe ein Teil des Äthylens zusammen mit den höheren Kohlenwasserstoffen abgeht, wird gemäß einem weiteren Kennzeichen der Erfindung diese erste Adsorption vorzugsweise so geführt, daß dem Rohrgas die C3-Rohllenwasserstoffe nur bis zu etwa 900/0. und die Kohlenwasserstoffe von C4 an aufwärts erst vollständig entzogen werden. Hierdurch wird verhindert, daß der Äthylengehalt im Desorptionsprodukt der ersten Adsorptionsstufe übermäßig stark ansteigt, was bei einem Weitertreiben der Adsorption hinsichtlich der C3-Kohlenwaserstoffe leicht eintreten würde. Since it cannot be avoided that in the first adsorption stage part of the ethylene goes off together with the higher hydrocarbons according to a further characteristic of the invention, this first adsorption is preferred guided in such a way that the tube gas contains the C3 raw hydrogen only up to about 900/0. and the hydrocarbons are only completely removed from C4 upwards. Through this prevents the ethylene content in the desorption product of the first adsorption stage increases excessively, which in driving adsorption in terms of the C3 hydrocarbons would easily enter.
Um das dennoch in der ersten Adsorptionsstufe anfallende Äthylen ebenfalls zu gewinnen, besteht eine weitere Ausgestaltung der Erfindung darin, daß aus dem Desorptionsprodukt der ersten Adsorptionsstufe durch Druckdestillation der schwerer als Äthylen siedenden Anteile das noch darin enthaltene Äthylen befreit wird und letzteres dem Desorptionsprodukt der zweiten Adsorptionsstufe zugesetzt wird. About the ethylene that still occurs in the first adsorption stage also win, a further embodiment of the invention is that from the desorption product of the first adsorption stage by pressure distillation of the The ethylene still contained therein is freed from parts that boil heavier than ethylene and the latter is added to the desorption product of the second adsorption stage will.
Die für die Durchführung des Verfahrens nach der Erfindung bestimmte Einrichtung ist im wesentlichen dadurch gekennzeichnet, daß zwei in Reihe liegende Adsorptionsanlagen für die zweistufige Adsorption des Rohgases vorgesehen sind und vorzugsweise die erste Anlage mit einer Kolonne für die Druckdestillationsbehandlung des Desorptionsproduktes derselben in Verbindung steht. The intended for carrying out the method according to the invention Device is essentially characterized in that two in series Adsorption systems for two-stage adsorption of the raw gas are provided and preferably the first plant with a column for pressure distillation treatment of the desorption product thereof is in connection.
In jeder dieser beiden Adsorptionsanlagen erfolgt zweckmäßig die Adsorption unter Druck und die Regeneration bzw. Desorption drucklos. Diese Desorption wird vorzugsweise in der ersten Stufe mit Dampf und in der zweiten Stufe mit Dampf oder Gas bzw. Dampf und Gas vorgenommen, wobei als Gas vorteilhaft Restgas aus der Gaszerlegung verwendet werden kann. In each of these two adsorption systems, the Adsorption under pressure and regeneration or desorption without pressure. This desorption is preferably in the first stage with steam and in the second stage with steam or gas or steam and gas, the gas advantageously being residual gas from the Gas separation can be used.
In der Destillationskolonne, die das in der ersten Adsorptionsanlage bei der Desorption anfallende Produkt aufnimmt, werden alle schwerer als Äthylen siedenden Teile, soweit sie bei gewöhnlicher Temperatur nicht flüssig sind, durch Druckeinwirkung flüssig abgeschieden und das Äthylen nebst weiteren leichtflüchtigen Stoffen gasförmig gewonnen. In the distillation column, which is the one in the first adsorption system absorbs the product obtained during desorption, all of them are heavier than ethylene boiling parts, as long as they are not liquid at normal temperature Liquid deposited under pressure and the ethylene along with other volatile ones Substances obtained in gaseous form.
Ein Ausführungsbei spiel einer derarti-gen-Anlage ist in der Zeichnung dargestellt. An exemplary embodiment of such a system is shown in the drawing shown.
In den Adsorbern 1 der ersten Stufe, denen das Gas durch die Leitung 2 zugeführt wird, werden die schweren I(ohlenwas.sersto,ffe (C und höhere) adsoirbiert. Das Gas verläßt die Adsorber 1 durch die Leitung 3, die zur zweiten Stufe führt. Das Regenerationsmittel (Dampf oder Gas) wird den Adsorbern 1 durch die Leitung 4 zugeführt. Durch das Regenerationsmittel werden in den Adsorbern 1 die Kohlenwasserstoffe aus der Aktivkohle wieder ausgetrieben und in dem Kondensator 5 zum Teil niedergeschlagen. im übrigen gekühlt. Der nicht kondensierte Anteil, in dem auf alle Fälle das Äthylen enthalten ist, wird. wenn die Regeneration drucklos erfolgt, durch einen Kompressor 6 der Destillationskolonne 7 zugeführt. In the adsorbers 1 of the first stage, which the gas through the line 2 is supplied, the heavy I (ohlenwas.sersto, ffe (C and higher) are adsorbed. The gas leaves the adsorber 1 through line 3, which leads to the second stage. The regeneration medium (steam or gas) is the adsorbers 1 through the line 4 supplied. By the regeneration agent in the adsorbers 1, the hydrocarbons expelled from the activated carbon again and partially deposited in the condenser 5. otherwise chilled. The non-condensed part, in which in any case the ethylene is included, will. if the regeneration takes place without pressure, through a compressor 6 is fed to the distillation column 7.
Bei 8 verlassen die höhersiedenden Anteile, bei 10 im wesentlichen das Äthylen die Kolonne.At 8 the higher-boiling components leave, at 10 essentially the ethylene the column.
Das Gas gelangt durch die Leitung 3 zur zweiten Stufe in die Adsorber 9 und verläßt bei 15 die Anlage, von Äthylen befreit. Die Regeneration in der zweiten Stufe erfolgt durch ein Regenerationsmittel (Dampf oder Gas), das durch die Leitung 11 eintritt. Aus dem beladenen Regenerationsmittel wird das Kondensierbare (z. B. Dampf? im Kondensator 12 niedergeschlagen und das Unkondensierbare (im wesentlichen Äthylenj im Gasseheider 13 abgeschieden. The gas passes through line 3 to the second stage in the adsorber 9 and leaves the plant at 15, freed from ethylene. The regeneration in the second Stage takes place through a regeneration agent (steam or gas) that passes through the pipe 11 entry. The condensable (e.g. Steam? precipitated in the condenser 12 and the uncondensable (essentially Ethylenj deposited in Gasseheider 13.
Dieses den Hauptanteil des Äthylens enthaltende Gas wird mit dem Gas aus der Leitung 10 zusammengeführt und gelangt durch die Leitung 14 zur NVeiterverarbeitungsanlage.This gas, which contains the majority of the ethylene, is mixed with the gas merged from the line 10 and passed through the line 14 to the N further processing plant.
Zur Unterstützung des Vorganges können die Adsorber einer oder beider Stufen mit Heiz- und Kühlschlangen ausgerüstet werden. To support the process, the adsorbers can either or both Stages can be equipped with heating and cooling coils.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1956P0016366 DE1020658B (en) | 1956-06-01 | 1956-06-01 | Process for the production of ethylene by gas separation at low temperatures and equipment to carry out the process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1956P0016366 DE1020658B (en) | 1956-06-01 | 1956-06-01 | Process for the production of ethylene by gas separation at low temperatures and equipment to carry out the process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1020658B true DE1020658B (en) | 1957-12-12 |
Family
ID=588932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1956P0016366 Pending DE1020658B (en) | 1956-06-01 | 1956-06-01 | Process for the production of ethylene by gas separation at low temperatures and equipment to carry out the process |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1020658B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011083149A1 (en) | 2010-01-08 | 2011-07-14 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Device for measuring the speed of displacement of an object deforming the lines of the terrestrial magnetic field |
-
1956
- 1956-06-01 DE DE1956P0016366 patent/DE1020658B/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011083149A1 (en) | 2010-01-08 | 2011-07-14 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Device for measuring the speed of displacement of an object deforming the lines of the terrestrial magnetic field |
| US9092982B2 (en) | 2010-01-08 | 2015-07-28 | Commissariat à l'énergie atomique et aux énergies alternatives | Device for measuring the speed of displacement of an object deforming the lines of the terrestrial magnetic field |
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