Die Erfindung betrifft ein Verfahren zur trenntechnischen Bearbeitung eines an Wasserstoff, Methan und Kohlenwasserstoffen mit zwei Kohlenstoffatomen reichen Einsatzstroms (a), bei dem aus Fluid des Einsatzstroms (a) ein an Methan und Wasserstoff reicher und an Kohlenwasserstoffen mit zwei Kohlenstoffatomen armer erster Abstrom (b) gewonnen wird. Die Kohlenwasserstoffe mit zwei Kohlenstoffatomen werden aus dem Fluid des Einsatzstroms (a) durch Inkontaktbringen mit Fluid eines an Kohlenwasserstoffen mit zumindest drei Kohlenstoffatomen reichen Waschstroms (c) uberwiegend oder vollstandig ausgewaschen, wodurch aus dem Fluid des Einsatzstroms (a) der erste Abstrom (b) und ein an Kohlenwasserstoffen mit zwei und mehr Kohlenstoffatomen reicher flussiger zweiter Abstrom (e) gewonnen werden. Eine entsprechende Anlage (100) ist ebenfalls Gegenstand der Erfindung.

Method and installation for processing an input flow with separation technology

Die Erfindung betrifft ein Verfahren (100) zur trenntechnischen Bearbeitung eines Ausgangsgemischs (a), das uberwiegend Wasserstoff, Methan und Kohlenwasserstoffe mit zwei Kohlenstoffatomen enthalt, wobei das Verfahren (100) ein Bilden eines ersten Trenneinsatzes unter Verwendung des Ausgangsgemischs und ein absorptives Trennen (12) des ersten Trenneinsatzes unter Verwendung einer Absorptionsflussigkeit (c), die uberwiegend Kohlenwasserstoffe mit zumindest drei Kohlenstoffatomen enthalt umfasst, wobei das absorptive Trennen (c) des ersten Trenneinsatzes das Erzeugen eines ersten Trennprodukts (b), das uberwiegend Wasserstoff und Methan aus dem ersten Trenneinsatz enthalt, und eines zweiten Trennprodukts (d), das Wasserstoff, Methan und Kohlenwasserstoffe mit zwei Kohlenstoffatomen aus dem ersten Trenneinsatz und Kohlenwasserstoffe mit zumindest drei Kohlenstoffatomen aus der Absorptionsflussigkeit enthalt, umfasst. The invention relates to a method (100) for separating technical processing of a starting mixture (a) containing mainly hydrogen, methane, and hydrocarbons containing two carbon atoms, said method (100) forming a first partition insert using the output mixture and an absorptive separation (12 ) of the first partition insert using an absorption liquid (c) containing mainly hydrocarbons comprising at least three carbon atoms, wherein the absorptive separation (c) of the first partition insert creating a first separation product (b) which mainly hydrogen and methane from the first partition insert includes, and a second separation product (d), the hydrogen, methane and hydrocarbons with two carbon atoms from the first partition insert and hydrocarbons containing at least three carbon atoms from the absorption liquid comprises. Es ist das Bilden eines zweiten Trenneinsatzes unter Verwendung des zweiten Trennprodukts (d) und ein destillatives Trennen (2) des zweiten Trenneinsatzes vorgesehen, wobei das destillative Trennen (2) des zweiten Trenneinsatzes das Erzeugen eines dritten Trennprodukts (p), das uberwiegend Methan, Wasserstoff und Kohlenwasserstoffe mit zwei Kohlenstoffatomen enthalt, und das Erzeugen eines vierten Trennprodukts (f), das uberwiegend Kohlenwasserstoffe mit zumindest drei Kohlenstoffatomen enthalt, umfasst. It is forming a second partition insert using the second separator product (d) and a distillative separation (2) of the second partition insert provided, wherein the distillative separation (2) of the second partition insert generating a third separation product (p), the predominantly methane, containing hydrogen and hydrocarbons containing two carbon atoms, and generating a fourth separation product (f), containing mainly hydrocarbons comprising at least three carbon atoms comprising. Ferner ist das Bilden eines dritten Trenneinsatzes unter Verwendung des dritten Trennprodukts (p) und ein destillatives Trennen (6) des dritten Trenneinsatzes vorgesehen, wobei das destillative Trennen (6) des dritten Trenneinsatzes das Erzeugen eines funften Trennprodukts (s), das uberwiegend Methan, Wasserstoff und Kohlenwasserstoffe mit zwei Kohlenstoffatomen enthalt, und das Erzeugen eines sechsten Trennprodukts (g), das uberwiegend Kohlenwasserstoffe mit zwei Kohlenstoffatomen enthalt, umfasst. Further comprising forming a third partition insert using the third separation product (p) and a distillative separation (6) of the third partition insert is provided, wherein the distillative separation (6) of the third partition insert generating a fifth separating the product (s) that predominantly methane, containing hydrogen and hydrocarbons containing two carbon atoms, and producing a sixth separating product (g), which mainly contains hydrocarbons with two carbon atoms includes,. Schlieslich ist ein Verwenden des funften Trennprodukts (s) beim Bilden des ersten Trenneinsatzes vorgesehen. Finally, use of the fifth release product (s) in forming the first partition insert is provided. Eine entsprechende Anlage ist ebenfalls Gegenstand der Erfindung. A corresponding system is also the subject of the invention.

Method and system for processing an output flow with separation technology

The invention relates to a process (100) for extracting ethylene from methane, according to which a product mixture is provided using a method for the oxidative coupling of methane (1), said product mixture containing at least ethylene, ethane and methane and compounds that are lower-boiling than methane and higher-boiling than ethane. According to the invention, between 60 and 90 mole percent of the methane and at least a portion of the components that are lower-boiling than methane are first removed from the product mixture by means of an adsorptive method (4), and the product mixture is then subjected to at least one other treatment step and subsequently processed by separation in order to obtain a product rich in ethylene. The processing by separation includes a demethanisation process (9) to which at least a portion of the product mixture is subjected as a separation feed, and in which a portion of the methane and the majority of the ethane and the ethylene and the compounds that are higher-boiling than ethane are washed out of the separation feed first by means of an absorption liquid.

Process for extracting ethylene from methane

The invention discloses a heat exchange system of a demethanizer and a heat exchange method. The heat exchange system adopts one of the following manners: A, a branch separated from an outlet pipeline at the bottom of a 1# hydrogen-methane separation tank is connected with the demethanizer or a demethanizer return tank; B, an aftercooler is arranged at the top of the demethanizer return tank, and a branch separated from the outlet pipeline at the bottom of the 1# hydrogen-methane separation tank is connected with the aftercooler and then connected with the demethanizer return tank; C, a gas-liquid separation tank is arranged behind a cooling box, a gas phase outlet of the demethanizer return tank is connected with the cooling box and then connected with the gas-liquid separation tank, and the bottom of the gas-liquid separation tank is connected with the demethanizer return tank. Under the condition that the coolant level and compressor outlet pressure are unchanged, the gas phase at the top of the demethanizer return tank is cooled by use of local rich cold energy through reasonable optimization of matching of self cold energy of deep cooling, the heat transfer temperature difference of a condenser of the demethanizer is increased, and the loss of ethylene is reduced.

Heat exchange system of demethanizer and heat exchange method

The invention relates to a method for the separation processing of a gas mixture that contains ethylene, ethane, methane and compounds that boil lower than methane and that boil higher than ethane, wherein the gas mixture is subjected to a demethanization process (9), in which a first fraction and a second fraction are formed, wherein the first fraction contains at least the major part of the methane and of the compounds that boil lower than methane and the second fraction contains the major part of the ethane, of the ethylene and of the compounds of the gas mixture that boil higher than ethane. According to the invention, the demethanization process (9) comprises first subjecting the gas mixture to an absorption process, in which part of the methane and the major part of the ethane, of the ethylene and of the compounds that boil higher than ethane are scrubbed out of the gas mixture by means of an absorption liquid that contains hydrocarbons. In the absorption process, the first fraction stays back in a gaseous form and a liquid fraction is obtained, which contains the scrubbed-out compounds and at least the major part of the hydrocarbons of the absorption liquid that is used for the scrubbing out. Then the hydrocarbons of the absorption liquid are separated from the liquid fraction and the remainder is separated into the second fraction and a further fraction, which contains the scrubbed-out methane and at least a further part of the ethane and of the ethylene from the gas mixture, wherein the further fraction is subjected to the absorption process again.

Method for the separation processing of a gas mixture

The present invention relates to a process for purifying methanol to olefin effluents. It consists in the purification of the valuable olefins from the fuel gas (i.e. methane and hydrogen) with the help of separation steps, distillation steps and a final washing in an absorption column of only a small part of the extracted fuel gas.

Process for recovery light molecules from olefinic feedstream

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Process for recovery light molecules from olefinic feedstream