ES2167972T3 - Procedimiento para la obtencion de olefinas. - Google Patents

Procedimiento para la obtencion de olefinas.

Info

Publication number
ES2167972T3
ES2167972T3 ES99105125T ES99105125T ES2167972T3 ES 2167972 T3 ES2167972 T3 ES 2167972T3 ES 99105125 T ES99105125 T ES 99105125T ES 99105125 T ES99105125 T ES 99105125T ES 2167972 T3 ES2167972 T3 ES 2167972T3
Authority
ES
Spain
Prior art keywords
current
stage
buteno
butadien
reaction
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.)
Expired - Lifetime
Application number
ES99105125T
Other languages
English (en)
Inventor
Peter Dr Schwab
Ralf Dr Schulz
Michael Dr Schulz
Boris Dr Breitscheidel
Gerald Dr Meyer
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.)
BASF SE
Original Assignee
BASF SE
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
Application filed by BASF SE filed Critical BASF SE
Application granted granted Critical
Publication of ES2167972T3 publication Critical patent/ES2167972T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D3/00Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14Fractional distillation or use of a fractionation or rectification column
    • B01D3/141Fractional distillation or use of a fractionation or rectification column where at least one distillation column contains at least one dividing wall
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C11/00Aliphatic unsaturated hydrocarbons
    • C07C11/02Alkenes
    • C07C11/06Propene
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C41/00Preparation of ethers; Preparation of compounds having groups, groups or groups
    • C07C41/01Preparation of ethers
    • C07C41/05Preparation of ethers by addition of compounds to unsaturated compounds
    • C07C41/06Preparation of ethers by addition of compounds to unsaturated compounds by addition of organic compounds only
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00Purification; Separation; Use of additives
    • C07C7/148Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound
    • C07C7/163Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound by hydrogenation
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2521/00Catalysts comprising the elements, oxides or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium or hafnium
    • C07C2521/02Boron or aluminium; Oxides or hydroxides thereof
    • C07C2521/04Alumina
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2523/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
    • C07C2523/16Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • C07C2523/32Manganese, technetium or rhenium
    • C07C2523/36Rhenium
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2523/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
    • C07C2523/38Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals
    • C07C2523/40Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals of the platinum group metals
    • C07C2523/42Platinum
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2523/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
    • C07C2523/38Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals
    • C07C2523/40Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals of the platinum group metals
    • C07C2523/44Palladium
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2523/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
    • C07C2523/70Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of the iron group metals or copper
    • C07C2523/74Iron group metals
    • C07C2523/755Nickel
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/50Improvements relating to the production of bulk chemicals
    • Y02P20/52Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

LA OBTENCION DE OLEFINAS A PARTIR DE CORRIENTES DE C 4 DE REFINERIA O DE CRAQUEADO DE VAPOR SE REALIZA MEDIANTE A) DESTILACION EXTRACTIVA OPCIONAL DE BUTADIENO A PARTIR DE LA CORRIENTE DE C 4 CON UN DISOLVENTE SELECTIVO DEL BUTADIENO, B) HIDROGENACION SELECTIVA DE BUTADIENOS Y CONTAMINACIONES ACETILENICAS EN LA CORRIENTE DE C 4 DE LA REFINERIA O DEL CR AQUEADO DE VAPOR, O A LA CORRIENTE DE LA ETAPA A), CON ISOMERIZACION SIMULTANEA O A CONTINUACION Y QUE SEA POR LO MENOS PARCIAL DEL 1 - BUTENO PARA DAR 2 - BUTENO, C) RETIRADA DE I - BUTENO DE LA CORRIENTE DE C 4 OBTENIDA EN LA ETAPA B) MEDIAN TE LA REACCION CON UN ALCOHOL PARA FORMAR UN ETER, D) SEPARACION DE CONTAMINACIONES OXIGENADAS DE LA CORRIENTE DE C 4 O BTENIDA EN LA ETAPA C) CON MATERIALES ADSORBENTES, E) METATESIS EN DOS ETAPAS DE LOS BUTENOS EN LA CORRIENTE DE C 4 OBTENIDA EN LA ETAPA D) MEDIANTE LA REACCION DE 1 BUTENO Y 2 - BUTENO QUE CONTIENE LA CORRIENTE DE C 4 PARA DAR PROPENO Y 2 - PENTENO, Y A CONTINUACION LA REACCION DE 2 PENTENO CON ETENO PARA DAR PROPENO Y 1 - BUTENO EN PRESENCIA DE UN CATALIZADOR DE METATESIS.
ES99105125T 1998-03-27 1999-03-26 Procedimiento para la obtencion de olefinas. Expired - Lifetime ES2167972T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813720A DE19813720A1 (de) 1998-03-27 1998-03-27 Verfahren zur Herstellung von Olefinen

Publications (1)

Publication Number Publication Date
ES2167972T3 true ES2167972T3 (es) 2002-05-16

Family

ID=7862657

Family Applications (1)

Application Number Title Priority Date Filing Date
ES99105125T Expired - Lifetime ES2167972T3 (es) 1998-03-27 1999-03-26 Procedimiento para la obtencion de olefinas.

Country Status (8)

Country Link
US (1) US6166279A (es)
EP (1) EP0945415B1 (es)
JP (1) JPH11322637A (es)
CN (1) CN1235947A (es)
CA (1) CA2264305A1 (es)
DE (2) DE19813720A1 (es)
ES (1) ES2167972T3 (es)
TW (1) TW467880B (es)

Families Citing this family (60)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19728732A1 (de) * 1997-07-04 1999-01-07 Basf Ag Verfahren zur Gewinnung von Isobuten aus solches enthaltenden C¶4¶-Kohlenwasserstoffgemischen
DE19932060A1 (de) * 1999-07-12 2001-01-18 Basf Ag Verfahren zur Herstellung von C¶5¶-/C¶6¶-Olefinen
US6562230B1 (en) * 1999-12-22 2003-05-13 Chevron Usa Inc Synthesis of narrow lube cuts from Fischer-Tropsch products
FR2802921B1 (fr) * 1999-12-24 2002-08-23 Inst Francais Du Petrole Production d'isobutene de haute purete et de propylene a partir de coupes d'hydrocarbures a quatre atomes de carbone
DE10000889C2 (de) * 2000-01-12 2002-12-19 Mg Technologies Ag Verfahren zum Erzeugen von C¶2¶- und C¶3¶-Olefinen aus Kohlenwasserstoffen
DE10013253A1 (de) * 2000-03-17 2001-09-20 Basf Ag Verfahren zur flexiblen Herstellung von Propen und Hexen
WO2002083609A1 (de) * 2001-04-12 2002-10-24 Basf Aktiengesellschaft Verfahren zur herstellung von propen
US20050124839A1 (en) * 2001-06-13 2005-06-09 Gartside Robert J. Catalyst and process for the metathesis of ethylene and butene to produce propylene
DE10206845A1 (de) * 2002-02-19 2003-08-28 Basf Ag Modifiziertes Verfahren zur Herstellung von Tensidalkoholen und Tensidalkoholethern, die hergestellten Produkte und ihre Verwendung
US6777582B2 (en) 2002-03-07 2004-08-17 Abb Lummus Global Inc. Process for producing propylene and hexene from C4 olefin streams
DE10311139A1 (de) * 2003-03-14 2004-09-23 Basf Ag Verfahren zur Herstellung von 1-Buten
US7145049B2 (en) * 2003-07-25 2006-12-05 Catalytic Distillation Technologies Oligomerization process
DE10341614A1 (de) 2003-09-10 2005-04-28 Basf Ag Verfahren zur Herstellung von Xylylendiamin (XDA)
WO2005035469A1 (en) * 2003-10-02 2005-04-21 Shell Internationale Research Maatschappij B.V. Production of 1-alkenes from mixed olefin streams using catalytic distillation
US6884917B1 (en) * 2004-05-18 2005-04-26 Equistar Chemicals, Lp 1-butene production
DE102005009596A1 (de) * 2005-02-28 2006-08-31 Basf Ag Verfahren zur Metathese umfassend die Reinigung der Ausgangsstoffe
US20060235255A1 (en) * 2005-04-15 2006-10-19 Gartside Robert J Double bond hydroisomerization process
US7812185B2 (en) * 2005-06-06 2010-10-12 Dow Global Technologies Inc. Metathesis process for preparing an alpha, omega-functionalized olefin
US7459593B1 (en) * 2005-11-18 2008-12-02 Uop Llc Metathesis unit pretreatment process with formation of octene
ATE508147T1 (de) * 2006-02-23 2011-05-15 Basf Se Verfahren zur herstellung von polyisobutylen mit einem gehalt an endständigen doppelbindungen von mehr als 50 aus einem technischen 1-buten-, 2- buten- und isobuten-haltigen c4- kohlenwasserstoffstrom
WO2008041561A1 (fr) * 2006-09-26 2008-04-10 Mitsubishi Chemical Corporation Procédé de production de propylène
US7528290B2 (en) * 2006-12-28 2009-05-05 Uop Llc Apparatuses and methods for separating butene-1 from a mixed C4 feed
BRPI0814997A2 (pt) 2007-08-09 2015-02-03 Elevance Renewable Sciences Métodos térmicos para tratamento de uma matéria-prima de metátese
BRPI0814994A2 (pt) * 2007-08-09 2015-02-03 Elevance Renewable Sciences Métodos químicos para tratamento de uma matéria-prima de metátese
US9284515B2 (en) 2007-08-09 2016-03-15 Elevance Renewable Sciences, Inc. Thermal methods for treating a metathesis feedstock
US8487150B2 (en) 2008-07-18 2013-07-16 Basf Se Process for hydrogenating butadiyne
US9157037B2 (en) * 2008-12-18 2015-10-13 Uop Llc Process for improving flow properties of crude petroleum
US8263008B2 (en) * 2008-12-18 2012-09-11 Uop Llc Apparatus for improving flow properties of crude petroleum
US8258357B2 (en) * 2009-03-25 2012-09-04 Lummus Technology Inc. Production of propylene from butane
US8178736B2 (en) * 2009-08-07 2012-05-15 Lummus Technology Inc. Process and system for the production of isoprene
EP3170802B1 (en) 2009-10-12 2019-06-19 Elevance Renewable Sciences, Inc. Methods of refining and producing fuel from natural oil feedstocks
US9051519B2 (en) 2009-10-12 2015-06-09 Elevance Renewable Sciences, Inc. Diene-selective hydrogenation of metathesis derived olefins and unsaturated esters
US9365487B2 (en) 2009-10-12 2016-06-14 Elevance Renewable Sciences, Inc. Methods of refining and producing dibasic esters and acids from natural oil feedstocks
US8704029B2 (en) 2010-03-30 2014-04-22 Uop Llc Conversion of butylene to propylene under olefin metathesis conditions
CN103030509B (zh) * 2011-09-29 2015-06-10 中国石油化工股份有限公司 碳四和乙烯制丙烯的方法
EP2788457B1 (de) * 2011-12-05 2017-02-22 Basf Se Verfahren zur durchführung einer extraktivdestillation mit einem selektiven lösungsmittel, mit einem gereinigten dampfförmigen roh-c4-schnitt als einsatzstrom
CN103086830B (zh) * 2013-01-30 2015-04-08 中国石油化工股份有限公司 生产丁二烯的方法
US20140296587A1 (en) * 2013-03-28 2014-10-02 Uop Llc Integrated Process for Increasing Butadiene Production
EP3140270B1 (en) 2014-05-07 2019-03-13 SABIC Global Technologies B.V. Methods and systems for separating c4 crude streams
ES2856957T3 (es) * 2015-03-20 2021-09-28 Smh Co Ltd Proceso para metátesis de olefina
US10487275B2 (en) 2016-11-21 2019-11-26 Saudi Arabian Oil Company Process and system for conversion of crude oil to petrochemicals and fuel products integrating vacuum residue conditioning and base oil production
US20180142167A1 (en) 2016-11-21 2018-05-24 Saudi Arabian Oil Company Process and system for conversion of crude oil to chemicals and fuel products integrating steam cracking and fluid catalytic cracking
US10472580B2 (en) 2016-11-21 2019-11-12 Saudi Arabian Oil Company Process and system for conversion of crude oil to petrochemicals and fuel products integrating steam cracking and conversion of naphtha into chemical rich reformate
US10472579B2 (en) 2016-11-21 2019-11-12 Saudi Arabian Oil Company Process and system for conversion of crude oil to petrochemicals and fuel products integrating vacuum gas oil hydrocracking and steam cracking
US10870807B2 (en) 2016-11-21 2020-12-22 Saudi Arabian Oil Company Process and system for conversion of crude oil to petrochemicals and fuel products integrating steam cracking, fluid catalytic cracking, and conversion of naphtha into chemical rich reformate
US10472574B2 (en) 2016-11-21 2019-11-12 Saudi Arabian Oil Company Process and system for conversion of crude oil to petrochemicals and fuel products integrating delayed coking of vacuum residue
US11066611B2 (en) 2016-11-21 2021-07-20 Saudi Arabian Oil Company System for conversion of crude oil to petrochemicals and fuel products integrating vacuum gas oil hydrotreating and steam cracking
US10407630B2 (en) 2016-11-21 2019-09-10 Saudi Arabian Oil Company Process and system for conversion of crude oil to petrochemicals and fuel products integrating solvent deasphalting of vacuum residue
US10487276B2 (en) 2016-11-21 2019-11-26 Saudi Arabian Oil Company Process and system for conversion of crude oil to petrochemicals and fuel products integrating vacuum residue hydroprocessing
US10619112B2 (en) 2016-11-21 2020-04-14 Saudi Arabian Oil Company Process and system for conversion of crude oil to petrochemicals and fuel products integrating vacuum gas oil hydrotreating and steam cracking
CN110869339A (zh) * 2017-05-15 2020-03-06 德希尼布工艺技术股份有限公司 用于复分解方法的液体异构化
CN107417500A (zh) * 2017-08-04 2017-12-01 辽宁嘉合精细化工有限公司 一种混合碳四原料预处理方法及一种采用混合碳四为原料的生产工艺
US11161055B2 (en) * 2017-09-19 2021-11-02 Sulzer Management Ag Use of top dividing wall in isomerization unit
CA3074603C (en) * 2017-09-28 2024-04-02 Exxonmobil Research And Engineering Company Dual-dividing wall column with multiple products
FR3074802B1 (fr) * 2017-12-13 2019-12-06 IFP Energies Nouvelles Procede d'elimination simultanee d'isobutanal et d'acetone de charges olefiniques par adsorption sur un materiau zeolithique
CN114433070B (zh) 2020-10-20 2023-08-29 中国石油化工股份有限公司 用于烯烃歧化反应的催化剂颗粒、制备方法及其应用
CN114456030B (zh) * 2020-10-22 2024-05-07 中国石油化工股份有限公司 混合碳四碳五物料的综合利用方法
CN114478161B (zh) * 2020-10-23 2024-09-17 中国石油化工股份有限公司 混合c4物流选择加氢的装置和方法
WO2023140986A1 (en) 2022-01-19 2023-07-27 Exxonmobil Chemical Patents Inc. Compositions containing tri-cyclopentadiene and processes for making same
US11866397B1 (en) * 2023-03-14 2024-01-09 Saudi Arabian Oil Company Process configurations for enhancing light olefin selectivity by steam catalytic cracking of heavy feedstock

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3660506A (en) * 1970-01-26 1972-05-02 Phillips Petroleum Co Conversion of olefins
FR2608595B1 (fr) * 1986-12-17 1989-04-28 Inst Francais Du Petrole Procede de metathese d'olefines
US5300718A (en) * 1988-09-19 1994-04-05 Lyondell Petrochemical Company Olefin conversion process
GB9413783D0 (en) * 1994-07-08 1994-08-24 Bp Chem Int Ltd Olefin metathesis
FR2733978B1 (fr) * 1995-05-11 1997-06-13 Inst Francais Du Petrole Procede et installation pour la conversion de coupes c4 et c5 olefiniques en ether et en propylene
WO1997032838A1 (en) * 1996-03-08 1997-09-12 Phillips Petroleum Company Production of a high purity butene-1 product from butadiene-rich c4 stream
ES2142649T3 (es) * 1996-09-27 2000-04-16 Basf Ag Procedimiento para la obtencion de propeno.
DE19640026A1 (de) * 1996-09-27 1998-04-02 Basf Ag Verfahren zur Herstellung von Propen

Also Published As

Publication number Publication date
CN1235947A (zh) 1999-11-24
CA2264305A1 (en) 1999-09-27
DE19813720A1 (de) 1999-09-30
EP0945415A1 (de) 1999-09-29
TW467880B (en) 2001-12-11
EP0945415B1 (de) 2001-11-07
US6166279A (en) 2000-12-26
DE59900390D1 (de) 2001-12-13
JPH11322637A (ja) 1999-11-24

Similar Documents

Publication Publication Date Title
ES2167972T3 (es) Procedimiento para la obtencion de olefinas.
ES2185255T3 (es) Procedimiento para la preparacion de propeno y, dado el caso, de 1-buteno.
MY127059A (en) Process for the preparation of c5-/c6-olefins.
ES2177853T3 (es) Procedimiento para convertir cargas de hidrocarburo que contienen parafinas en productos destilados intermedios de alta calidad.
AR221246A1 (es) Procedimiento para la preparacion de componentes cataliticos para la polimerizacion de olefinas,componentes obtenidos con el mismo y portadores que los contienen
AR022415A2 (es) Composicion no acuosa de tinta, producto de carbon para su uso en la misma y metodo para obtenerla
AR241012A1 (es) Un procedimiento para la trimerizacion de una olefina seleccionada del grupo que consiste en etileno, propileno,1-buteno, y mezclas de los mismos ,catalizador utilizado en el mismo y procedimiento para prepararlo"
ES2081411T3 (es) Procedimiento para la obtencion de poliisobuteno.
ES2162476T3 (es) Procedimiento para la obtencion de octenos y dodecenos esencialmente no ramificados mediante oligomerizado de butenos no ramificados.
BR0104335A (pt) Estabilização de catalisadores de ródio para a hidroformilação de olefinas
AR247191A1 (es) Un proceso y un aparato para convertir olefinas en hidrocarburos superiores
ATE223952T1 (de) Herstellung von olefinen
ATE362903T1 (de) Verfahren zur oligomerisierung von olefinen
ES2193540T3 (es) Procedimiento mejorados para preparar tensioactivos de aquilbencenosulfonato y productos que contienen dichos tensioactivos.
ES2185283T3 (es) Procedimiento para elaborar oxo-alcoholes superiores a partir de mezclas de olefinas mediante hidroformilacion en dos etapas.
AR010389A1 (es) Un catalizador util en la produccion de olefinas livianas, un proceso para la modificacion del catalizador y un proceso para la produccion de olefinaslivianas
BR9606923A (pt) Processos para a hidroformilação de uma corrente de alimentação contendo hidrocarboneto e para a fabricação de um éster
PE20010161A1 (es) Proceso para separar olefinas de hidrocarburos saturados
ES2142649T3 (es) Procedimiento para la obtencion de propeno.
GB8804033D0 (en) Process for preparing normally liquid hydrocarbonaceous products from hydrocarbon feed
IT1147324B (it) Procedimento di siolamento dell'etere metil butilico terziario a partire dai prodotti della reazione del metanolo con una frazione di idrocarburi c4 contenente dell'isobutene
AR005942A1 (es) Procedimiento para la preparacion de alquil eteres y mezclas de los mismos
BR8001259A (pt) Processo de obtencao de isobuteno a partir de misturas de hidrocarbonetos de c4, contendo isobuteno
MY115365A (en) Olefin metathesis
ATE63535T1 (de) Verfahren zur gewinnung von 2-butenen aus 1-buten und gegebenenfalls 2-butene enthaltenden c4- kohlenwasserstoffgemischen.