Abstract: A process for separating a component mixture comprising essentially hydrocarbons having two or two or more carbon atoms, methane and hydrogen using a distillation apparatus (10) is proposed. Fluid (a, c, e, g, i) from the component mixture is cooled stepwise to a first pressure level, with separation of first condensates (b, d, f, h, j) out of the fluid (a, c, e, g, i) in each case. Fluid (k) from the component mixture that remains in gaseous form thereafter is expanded to a second pressure level in an expander, giving a second condensate (l). Fluid from the first condensates (b, d, f, h, j) is expanded from the first pressure level to the second pressure level and fed together with the fluid from the second condensates into the distillation apparatus (10) which is being operated at the second pressure level. The present invention likewise provides a corresponding separation apparatus.

Abstract: A method and a system for separating a feed flow which contains at least hydrogen and a hydrocarbon with three or four carbon atoms per molecule, in particular propane, propylene, propadiene, butane, 1-butene, 2-butene, and/or 1,3-butadiene. The condensed feed flow is cooled over multiple cooling steps in at least two heat exchangers and is then separated into a condensate and a residual gas flow after each cooling step. The at least two heat exchangers are operated at least two different temperature levels, wherein a hot heat exchanger is operated at an average temperature level, and a cold heat exchanger is operated at a lower temperature level. An internal refrigerant which is made of a part of one of the condensate flows and a part of one of the residual gas flows, is used to dispense a part of the heat from the cold heat exchanger.

Abstract: A process (100, 200, 300) for the production of ethylene is proposed in which a first feed gas (A) and a second feed gas (B) are fed to a reactor (1) and processed therein by vapour cracking to obtain a product mixture (C), the first feed gas (A) comprising more than 90 weight percent saturated hydrocarbons and more than 80 weight percent ethane, and wherein the product mixture (C) or a part thereof is subjected to a treatment (2, 3, 4) and the resulting mixture (F) or a part thereof is subjected to a separation (10) to obtain a resulting mixture (F) containing hydrogen, methane, ethane, ethylene and hydrocarbons having three, four and at least five carbon atoms.

Abstract: A process (100, 200, 300) for the production of ethylene is proposed in which a first feed gas (A) and a second feed gas (B) are fed to a reactor (1) and processed therein by vapour cracking to obtain a product mixture (C), the first feed gas (A) comprising more than 90 weight percent saturated hydrocarbons and more than 80 weight percent ethane, and wherein the product mixture (C) or a part thereof is subjected to a treatment (2, 3, 4) and the resulting mixture (F) or a part thereof is subjected to a separation (10) to obtain a resulting mixture (F) containing hydrogen, methane, ethane, ethylene and hydrocarbons having three, four and at least five carbon atoms.

Abstract: A process for separating a component mixture comprising essentially hydrocarbons having two or two or more carbon atoms, methane and hydrogen using a distillation apparatus (10) is proposed. Fluid (a, c, e, g, i) from the component mixture is cooled stepwise to a first pressure level, with separation of first condensates (b, d, f, h, j) out of the fluid (a, c, e, g, i) in each case. Fluid (k) from the component mixture that remains in gaseous form thereafter is expanded to a second pressure level in an expander, giving a second condensate (I). Fluid from the first condensates (b, d, f, h, j) is expanded from the first pressure level to the second pressure level and fed together with the fluid from the second condensates into the distillation apparatus (10) which is being operated at the second pressure level. The present invention likewise provides a corresponding separation apparatus.

Abstract: Proposed is a process (100) for producing ethylene in which ethane in a reaction input is partly catalytically converted by oxidative dehydrogenation (1) in the presence of oxygen to obtain a gaseous first component mixture containing at least ethane, ethylene, acetic acid and water. It is provided that at least a portion of the gaseous first component mixture is subjected to a scrubbing operation with a scrubbing liquid to obtain a liquid second component mixture containing water and acetic acid, that a first proportion of the second component mixture is used for forming the scrubbing liquid, that a second proportion of the second component mixture is subjected to a solvent extraction to obtain a liquid third component mixture containing at least one organic solvent and acetic acid and that at least a portion of the liquid third component mixture is heated and subjected to a distillation to obtain a liquid containing predominantly or exclusively acetic acid.

Abstract: Proposed is a process (100) for producing ethylene in which ethane in a reaction input is partly catalytically converted by oxidative dehydrogenation (1) in the presence of oxygen to obtain a gaseous first component mixture containing at least ethane, ethylene, acetic acid and water. It is provided that at least a portion of the gaseous first component mixture is subjected to a scrubbing operation with a scrubbing liquid to obtain a liquid second component mixture containing water and acetic acid, that a first proportion of the second component mixture is used for forming the scrubbing liquid, that a second proportion of the second component mixture is subjected to a solvent extraction to obtain a liquid third component mixture containing at least one organic solvent and acetic acid and that at least a portion of the liquid third component mixture is heated and subjected to a distillation to obtain a liquid containing predominantly or exclusively acetic acid.

Abstract: The present invention relates to a process (100) for separatory processing of a starting mixture containing predominantly hydrogen, methane and hydrocarbons having two or two or more carbon atoms, wherein at least a portion of the starting mixture is cooled to form one or more condensates using one or more heat exchangers (101, 103, 105, 107) and at least a portion of the condensate(s) is subjected to a rectification to form a gaseous methane-rich fraction. It is provided that the gaseous methane-rich fraction is used to form a first fluid stream which is at least partly compressed, in an unchanged composition with respect to the gaseous methane-rich fraction, to a liquefaction pressure level of 35 to 45 bar, and at least partly liquefied by cooling, and in that the first fluid stream, or a second fluid stream formed using the first fluid stream, is expanded to a delivery pressure and heated in the or at least one of the heat exchanger(s) (101, 103, 105, 107).

Abstract: The invention relates to a process (10) for the production of propylene which comprises carrying out a process (1) for propane dehydrogenation to obtain a first component mixture (A), carrying out a further propylene production method (2) to obtain a second component mixture (B), and forming a separation product (P2) containing predominantly propane using one or more propane separation steps (S1), wherein at least part of the first component mixture (A) is supplied to the propane separation step or steps (S1). It is envisaged that the separation product (P2), which mainly contains propane, will at least partly be returned to the further propylene production method (2). A corresponding plant and a process for converting a steam cracking plant are also the subject of the invention.

Abstract: A method for separating a hydrogen-containing hydrocarbon mixture (C2minus), which in addition to the hydrogen essentially contains hydrocarbons with two carbon atoms and methane, using a distillation column (10). Fluid (a, c, e) of the hydrocarbon mixture (C2minus) is cooled stepwise at a first pressure level, during which time first condensates (b, d) are separated from the fluid (a, c, e). Fluid (e) from the hydrocarbon mixture (C2minus) which remains gaseous after this is fed at the first pressure level into a C2 absorber (7), to which a liquid reflux (r) is added at the top, while a second condensate (f) is drawn off from the sump of the C2 absorber (7) and a gaseous top stream (g) containing predominantly methane and hydrogen is drawn off at the top of the C2 absorber (7).

Abstract: The invention concerns a process (10) for the production of propylene, which comprises carrying out a process (1) for propane dehydrogenation to obtain a first component mixture (A), carrying out a steam cracking process (2) to obtain a second component mixture (B), forming a first separation product (P1) which contains at least predominantly propylene using one or more first separation steps (S1), forming a second separation product (P2) containing at least predominantly propane using the first separation step(s) (S1), forming a third separation product (P3) containing at least predominantly ethylene using one or more second separation steps (S2) and forming a fourth separation product (P4) containing at least predominantly ethane using the second separation step(s) (S1).

Abstract: A method for preparing hydrocarbons is proposed, which comprises, in a catalysis unit (1) using one or more catalysis feed streams (a) containing oxygenates and/or olefins, producing a catalysis product stream (b) containing n-butane, isobutane, 1-butene, 2-butene, isobutene and hydrocarbons with more than four and/or less than four carbon atoms, and which further comprises producing a steam cracking product stream (s) in a steam cracking unit (2) using one or more steam cracking feed streams (g, n, l, r).

Abstract: A method for producing hydrocarbons is proposed wherein a catalysis product stream (b) rich in n-butane, isobutane, 1-butene, 2-butene, isobutene and hydrocarbons with more than four and/or less than four carbon atoms is produced in a catalysis unit (1), using one or more catalyst feed streams containing oxygenates and/or olefins (a) and wherein additionally a steam cracking product stream (h) is produced in a steam cracking unit (2) using one or more steam cracking feed streams (g, r, s). It is provided that using the catalysis product stream (b) a skeletal isomerisation feed stream (f, q) poor in 1-butene, 2-butene and isobutene and containing at least isobutane is produced, in which the isobutane is at least predominantly reacted by skeletal isomerisation to form n-butane, and which is subsequently used at least partly as the, or one of the, steam cracking feed streams (g, r). The invention also relates to an apparatus (100, 200).

Abstract: A method (100) for producing olefins is proposed, wherein a first gas mixture (b) is produced by means of a steam cracking process (1) and a second gas mixture (s) is produced by means of an oxygenate-to-olefin process (2), the first gas mixture (b) and the second gas mixture (s) each containing at least hydrocarbons with one to four carbon atoms.

Abstract: A method for separating a hydrogen-containing hydrocarbon mixture (C2minus), which in addition to the hydrogen essentially contains hydrocarbons with two carbon atoms and methane, using a distillation column (10). Fluid (a, c, e) of the hydrocarbon mixture (C2minus) is cooled stepwise at a first pressure level, during which time first condensates (b, d) are separated from the fluid (a, c, e). Fluid (e) from the hydrocarbon mixture (C2minus) which remains gaseous after this is fed at the first pressure level into a C2 absorber (7), to which a liquid reflux (r) is added at the top, while a second condensate (f) is drawn off from the sump of the C2 absorber (7) and a gaseous top stream (g) containing predominantly methane and hydrogen is drawn off at the top of the C2 absorber (7).

Abstract: A method (100) for obtaining olefins is proposed, wherein a first gas mixture (b), which is produced by a steam cracking process (1), is at least partially used to form a first separation feedstock (f) which contains hydrocarbons with one to five carbon atoms, and from which at least a first separation product (g) and a second separation product (h, o) are produced, the first separation product (g) containing at least the greater proportion of the hydrocarbons with one carbon atom and of the hydrocarbons with two carbon atoms contained in the first separation feedstock (f), and the second separation product (h, o) containing at least the greater proportion of the hydrocarbons with four carbon atoms and of the hydrocarbons with five carbon atoms contained in the first separation feedstock (f), and wherein a second gas mixture (r) which is produced by an oxygenate-to-olefin process (2) is used at least partially to form a second separation feedstock (t) which contains hydrocarbons with one to five carbon atoms,