EP3177385A1 - Récupération de gaz, notamment de gaz permanents, à partir de flux de matières, en particulier de flux de polymérisations dans des effluents - Google Patents

Récupération de gaz, notamment de gaz permanents, à partir de flux de matières, en particulier de flux de polymérisations dans des effluents

Info

Publication number
EP3177385A1
EP3177385A1 EP15759631.3A EP15759631A EP3177385A1 EP 3177385 A1 EP3177385 A1 EP 3177385A1 EP 15759631 A EP15759631 A EP 15759631A EP 3177385 A1 EP3177385 A1 EP 3177385A1
Authority
EP
European Patent Office
Prior art keywords
stream
substance
retentate
permeate
fraction
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.)
Withdrawn
Application number
EP15759631.3A
Other languages
German (de)
English (en)
Inventor
Volker Witzleb
Werner Leitmayr
Christian Voss
Akos Tota
Martin Bauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Linde GmbH
Original Assignee
Linde GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE102014011750.2A external-priority patent/DE102014011750A1/de
Application filed by Linde GmbH filed Critical Linde GmbH
Publication of EP3177385A1 publication Critical patent/EP3177385A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
    • B01D53/229—Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/047—Pressure swing adsorption
    • 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
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/144—Purification; Separation; Use of additives using membranes, e.g. selective permeation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/24—Hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/10—Single element gases other than halogens
    • B01D2257/102—Nitrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/10—Single element gases other than halogens
    • B01D2257/108—Hydrogen

Definitions

  • the invention relates to a method for purifying a stream, wherein the stream has a C 2+ fraction and at least one first gaseous substance and a second gaseous substance different therefrom, wherein the stream is subjected to a pressure swing adsorption to remove the C 2+ fraction.
  • EP 1 491 559 describes a process in which an inert gas from an exhaust gas stream of a polymer production plant can be purified by means of an adsorption process and subsequently reused.
  • Polymerization solvent and the monomer are separated adsorptively from the exhaust stream, so that the purified, inert gas is present at high pressure.
  • US Pat. No. 6,706,857 describes a process for the recovery of olefinic monomers from a polymerization process. This is a gas stream
  • Monomer and nitrogen purified by pressure swing adsorption In the recovery of C 2+ hydrocarbons (ie hydrocarbons having two or more carbon atoms) from streams by pressure swing adsorption is usually a mixture of at least two permanent gas components as a high pressure product, which is often thermally recovered only by burning.
  • the invention is based on the object of improving a method of the type mentioned at the outset in such a way that the range of uses of the high-gas product is widened.
  • the stream after removal of the C 2+ fraction, is separated by means of a membrane into a retentate and a permeate, wherein the retentate is rich in the first material, and wherein the permeate is rich in the second material ,
  • the first substance is thus preferably a substance which permeates worse through the membrane than the second substance, so that it is enriched in the retentate, whereas the second substance is depleted in the retentate.
  • the second material is better permeated through the membrane than the first material, so that the second substance is enriched in the permeate and the first substance is depleted in the permeate.
  • H 2 can be depleted to less than 1% by volume in the retentate.
  • Wassertsoffkonzentrationen can be achieved above 40 vol .-%.
  • the retentate is present at the same pressure level as the stream purified by the C 2+ fraction and can then be used accordingly, for example in a previous process - in particular without expensive compaction , Any pressure loss across the diaphragm, fittings and / or piping can be compensated by a blower. However, this is much less expensive compared to the situation in which the desired product is present on the permeate side.
  • the first and second substances are preferably gases, which for historical reasons are also referred to as permanent gases. These are hydrogen, nitrogen, methane, carbon monoxide and carbon dioxide.
  • the first substance is nitrogen and the second substance is hydrogen.
  • the C 2+ fraction preferably comprises ethylene or propylene.
  • Pressure swing adsorption of the C 2+ fraction purified stream used is at least one of the following: polysulfone (PSU), polyethersulfone (PES), polyimide (PI), polyamide (PA).
  • PSU polysulfone
  • PES polyethersulfone
  • PI polyimide
  • PA polyamide
  • the material stream to be purified originates from an upstream of the Pressure swing adsorption performed process (eg, a process step or process in the form of a synthesis), wherein the stream is preferably an exhaust gas stream from such a process.
  • the exhaust gas flow may be, for example, a purge gas or a stripping gas.
  • the process or method is a polymerization. Under such a
  • Polymerization in the present case is understood to mean a polyreaction (also called a polymer formation reaction, named after IUPAC "Polymerization"), i. a synthesis reaction that converts similar or different monomers into polymers.
  • a polyreaction also called a polymer formation reaction, named after IUPAC "Polymerization”
  • IUPAC polymer formation reaction
  • polymerization may be a so-called chain polymerization or a so-called step growth reaction (e.g., polycondensation or polyaddition).
  • the material stream is preferably an exhaust gas stream, in particular a purge gas stream which is obtained during a polymerization.
  • Monomers used here such as, for example, ethylene or propylene (constituents of the C 2+ fraction), are then present in the stream of material or gas which further comprises, for example, nitrogen as the first substance (for example, if the polymer produced during the polymerization with nitrogen rinsed) and continue to use hydrogen as a second substance.
  • the permeate for example containing hydrogen
  • the permeate is preferably incinerated or, if appropriate, supplied as an export stream to another use.
  • Fig. 1 is a schematic representation of an embodiment of a
  • the method according to the invention makes it possible to separate a stream S, in particular in the form of an exhaust stream, consisting of at least two permanent gas components and at least one C 2+ hydrocarbon. This is in particular after an optional compression of the stream 5 in a first step, the C 2+ fraction separated by pressure swing adsorption (DWA) 10.
  • DWA pressure swing adsorption
  • the resulting C 2+ -free exhaust stream or stream S ' which is the high-pressure product of the DWA
  • the fraction S "adsorbed in the pressure swing adsorption is desorbed at a lower pressure and optionally fed to another use
  • the DWA is carried out at pressures of 5 bar to 30 bar and at a temperature of 10 ° C to 50 ° C.
  • Permanent gas components are separated into the retentate R and permeate P and also recycled or otherwise used.
  • the membrane separation is carried out at a pressure in the range of 5 bar to 30 bar and at a temperature in the range of 20 ° C to 80 ° C.
  • a stream S in the form of a purge gas stream comprising nitrogen, hydrogen and a monomer such as ethylene or propylene.
  • the high pressure product S ' only nitrogen and hydrogen.
  • this gas stream can be obtained by adding a downstream membrane separation 20, a nitrogen-rich retentate R at high pressure and a hydrogen-enriched permeate P at low pressure, the pressure loss substantially when passing through the Membrane 20 occurs.
  • the hydrogen-rich permeate stream P is furthermore preferably at least partially thermally utilized, it can be present at high pressure
  • Nitrogen / retentate R can be recycled to the polymerization process 30, whereby the need for fresh nitrogen in the polymerization process can be reduced.
  • N 2 is preferred for flushing the polymer outgassing container (PAB) or the
  • Reactor itself used Especially with the PAB N 2 is used continuously.
  • the recovery reduces the need for fresh N 2 , as well as reducing the amount of flaked fuel, which is an advantage under stringent environmental regulations.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Water Supply & Treatment (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Separation Of Gases By Adsorption (AREA)

Abstract

L'invention concerne un procédé de nettoyage d'un flux de matières (S) ; le flux de matières (S) comporte une fraction C2+ et au moins une première matière gazeuse et une seconde matière gazeuse différente de la première ; le flux de matières (S) est soumis à une adsorption à oscillation de pression (10) pour éliminer la fraction C2+. Selon l'invention, après l'élimination de la fraction C2+, le flux de matières (S) est divisé en un rétentat (R) et un perméat (P) au moyen d'une membrane (20) ; le rétentat (R) est enrichi en la première matière et le rétentat (R) est appauvri en la second matière, et le perméat (P) est appauvri en la première matière et le perméat (P) est enrichi en la seconde matière.
EP15759631.3A 2014-08-07 2015-07-23 Récupération de gaz, notamment de gaz permanents, à partir de flux de matières, en particulier de flux de polymérisations dans des effluents Withdrawn EP3177385A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102014011750.2A DE102014011750A1 (de) 2014-08-07 2014-08-07 Rückgewinnung von Gasen, insbesondere Permanentgasen, aus Stoffströmen, insbesondere aus Abgasströmen von Polymerisationen
EP14004421 2014-12-23
PCT/EP2015/001528 WO2016020042A1 (fr) 2014-08-07 2015-07-23 Récupération de gaz, notamment de gaz permanents, à partir de flux de matières, en particulier de flux de polymérisations dans des effluents

Publications (1)

Publication Number Publication Date
EP3177385A1 true EP3177385A1 (fr) 2017-06-14

Family

ID=54064259

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15759631.3A Withdrawn EP3177385A1 (fr) 2014-08-07 2015-07-23 Récupération de gaz, notamment de gaz permanents, à partir de flux de matières, en particulier de flux de polymérisations dans des effluents

Country Status (7)

Country Link
US (1) US10092876B2 (fr)
EP (1) EP3177385A1 (fr)
CN (1) CN107073390A (fr)
MY (1) MY179140A (fr)
RU (1) RU2687951C2 (fr)
SA (1) SA517380846B1 (fr)
WO (1) WO2016020042A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA3046067C (fr) * 2016-12-15 2024-06-04 Chevron Phillips Chemical Company Lp Procede d'inru hybride a adsorption modulee en pression et a membrane
DE102018009198A1 (de) * 2018-11-22 2020-05-28 Linde Aktiengesellschaft Verfahren zum Wechsel der Betriebsweise einer Elektrolyseanlage sowie Elektrolyseanlage
US20250243136A1 (en) * 2024-01-31 2025-07-31 Chevron Phillips Chemical Company Lp Olefin/paraffin separation using rectified ets-4

Citations (1)

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CN101757830A (zh) * 2010-01-18 2010-06-30 党延斋 一种炼厂干气中c2、c3组分及氢气的回收方法

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Also Published As

Publication number Publication date
US10092876B2 (en) 2018-10-09
RU2017107200A3 (fr) 2018-12-19
RU2687951C2 (ru) 2019-05-16
MY179140A (en) 2020-10-28
WO2016020042A1 (fr) 2016-02-11
US20170209830A1 (en) 2017-07-27
SA517380846B1 (ar) 2020-12-22
RU2017107200A (ru) 2018-09-07
CN107073390A (zh) 2017-08-18

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