ATE155454T1 - Alkenoligomerisierung - Google Patents

Alkenoligomerisierung

Info

Publication number
ATE155454T1
ATE155454T1 AT93903881T AT93903881T ATE155454T1 AT E155454 T1 ATE155454 T1 AT E155454T1 AT 93903881 T AT93903881 T AT 93903881T AT 93903881 T AT93903881 T AT 93903881T AT E155454 T1 ATE155454 T1 AT E155454T1
Authority
AT
Austria
Prior art keywords
alkene
oligomerization
alkene oligomerization
feedstock
feedstocks
Prior art date
Application number
AT93903881T
Other languages
English (en)
Inventor
Georges Marie Karel Mathys
Luc Roger Marc Martens
Marleen Augusta Baes
Johannes Petrus Verduijn
Diane Renata Cornel Huybrechts
Original Assignee
Exxon Chemical Patents Inc
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 Exxon Chemical Patents Inc filed Critical Exxon Chemical Patents Inc
Application granted granted Critical
Publication of ATE155454T1 publication Critical patent/ATE155454T1/de

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
    • B01J29/7042—TON-type, e.g. Theta-1, ISI-1, KZ-2, NU-10 or ZSM-22
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
    • C07C2/02—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons
    • C07C2/04—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons by oligomerisation of well-defined unsaturated hydrocarbons without ring formation
    • C07C2/06—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons by oligomerisation of well-defined unsaturated hydrocarbons without ring formation of alkenes, i.e. acyclic hydrocarbons having only one carbon-to-carbon double bond
    • C07C2/08—Catalytic processes
    • C07C2/12—Catalytic processes with crystalline alumino-silicates or with catalysts comprising molecular sieves
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2529/00—Catalysts comprising molecular sieves
    • C07C2529/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites, pillared clays
    • C07C2529/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • C07C2529/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2529/00—Catalysts comprising molecular sieves
    • C07C2529/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites, pillared clays
    • C07C2529/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • C07C2529/18—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2529/00—Catalysts comprising molecular sieves
    • C07C2529/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites, pillared clays
    • C07C2529/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • C07C2529/50—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the eroionite or offretite type, e.g. zeolite T
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2529/00—Catalysts comprising molecular sieves
    • C07C2529/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites, pillared clays
    • C07C2529/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • C07C2529/60—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the type L
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2529/00—Catalysts comprising molecular sieves
    • C07C2529/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites, pillared clays
    • C07C2529/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • C07C2529/65—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the ferrierite type, e.g. types ZSM-21, ZSM-35 or ZSM-38
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2529/00—Catalysts comprising molecular sieves
    • C07C2529/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites, pillared clays
    • C07C2529/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • C07C2529/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups C07C2529/08 - C07C2529/65

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
AT93903881T 1992-01-30 1993-01-27 Alkenoligomerisierung ATE155454T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92300797 1992-01-30

Publications (1)

Publication Number Publication Date
ATE155454T1 true ATE155454T1 (de) 1997-08-15

Family

ID=8211254

Family Applications (1)

Application Number Title Priority Date Filing Date
AT93903881T ATE155454T1 (de) 1992-01-30 1993-01-27 Alkenoligomerisierung

Country Status (8)

Country Link
US (1) US5672800A (de)
EP (2) EP0757976A3 (de)
JP (1) JP2901347B2 (de)
AT (1) ATE155454T1 (de)
CA (1) CA2128624C (de)
DE (1) DE69312268T2 (de)
WO (1) WO1993016020A2 (de)
ZA (1) ZA93594B (de)

Families Citing this family (64)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA933879B (en) * 1992-06-05 1993-12-27 Exxon Chemical Patents Inc ZSM-5-zeolite
GB9401275D0 (en) * 1994-01-24 1994-03-23 Exxon Chemical Patents Inc Zeolite and manufacturing process
GB9930402D0 (en) * 1999-12-23 2000-02-16 Exxon Chemical Patents Inc Selective removal of isobutene from C4 olefinic feedstocks
US6703356B1 (en) * 2000-03-23 2004-03-09 Exxonmobil Research And Engineering Company Synthetic hydrocarbon fluids
GB0010433D0 (en) * 2000-04-28 2000-06-14 Exxon Chemical Patents Inc Alkene oligomerization process
US7112711B2 (en) 2000-04-28 2006-09-26 Exxonmobil Chemical Patents Inc. Alkene oligomerization process
EP1167326B2 (de) † 2000-06-26 2007-11-14 Saudi Basic Industries Corporation Dimerisierung von Isobuten
US20020103406A1 (en) 2001-02-01 2002-08-01 Georges Mathys Production of olefin dimers and oligomers
US6875899B2 (en) * 2001-02-01 2005-04-05 Exxonmobil Chemical Patents Inc. Production of higher olefins
JP4728577B2 (ja) * 2001-10-24 2011-07-20 エクソンモービル・ケミカル・パテンツ・インク オレフィンのオリゴマー化の方法
AR036902A1 (es) 2001-10-24 2004-10-13 Exxonmobil Chem Patents Inc Un proceso para la oligomerizacion de un material de alimentacion olefinico, usos de un limite en el nivel de azufre en el material de alimentacion, una mezcla oligomerica olefinica, y un ester o una composicion polimerica plastificada
US20030147604A1 (en) * 2002-02-01 2003-08-07 Tapia Alejandro L. Housing assembly for providing combined electrical grounding and fiber distribution of a fiber optic cable
DE60332819D1 (de) * 2002-03-29 2010-07-15 Exxonmobil Chem Patents Inc Prozess zur olefin oligomerisation
US7183450B2 (en) * 2002-07-22 2007-02-27 Exxonmobil Chemical Patents Inc. Olefin oligomerization
US7253330B2 (en) * 2003-04-29 2007-08-07 Exxonmobil Chemical Patents Inc. Oligomerization process
US7586017B2 (en) 2003-12-18 2009-09-08 Exxonmobil Chemical Patents Inc. Hydrogenation
CN1894175B (zh) * 2003-12-18 2010-12-22 埃克森美孚化学专利公司 催化反应的改进或与催化反应相关的改进
US7405329B2 (en) 2003-12-18 2008-07-29 Exxonmobil Chemical Patents Inc. Hydroformylation
GB0412151D0 (en) * 2004-06-01 2004-06-30 Exxonmobil Chem Patents Inc Olefin oligomerization process
GB0412139D0 (en) * 2004-06-01 2004-06-30 Exxonmobil Chem Patents Inc Olefin oligomerization process
DE102005003109B4 (de) * 2005-01-22 2015-02-12 Air Liquide Global E&C Solutions Germany Gmbh Verfahren zur Herstellung von synthetischen Kraftstoffen aus Oxigenaten
WO2006094006A2 (en) * 2005-02-28 2006-09-08 Exxonmobil Research And Engineering Company Gasoline production by olefin polymerization
GB0511051D0 (en) 2005-05-31 2005-07-06 Exxonmobil Chem Patents Inc Molecular sieve catalyst treatment
GB0512377D0 (en) * 2005-06-17 2005-07-27 Exxonmobil Chem Patents Inc Oligomerisation of olefins with zeolite catalyst
FR2887538B1 (fr) * 2005-06-28 2008-01-04 Inst Francais Du Petrole Procede de traitement d'une zeolithe a petits et/ou moyens pores et son utilisation en oligomerisation des olefines legeres
US7588738B2 (en) * 2005-08-23 2009-09-15 Exxonmobil Chemical Patents Inc. Series catalyst beds
ATE513799T1 (de) * 2005-09-30 2011-07-15 Exxonmobil Chem Patents Inc Oligomerisierungsreaktion
US7501548B2 (en) 2006-03-10 2009-03-10 Exxonmobil Chemical Patents Inc. Oligomerization of isobutene-containing feedstocks
JP5204765B2 (ja) * 2006-06-07 2013-06-05 ビーエーエスエフ ソシエタス・ヨーロピア オレフィンを共二量化するための方法
GB0625528D0 (en) * 2006-12-21 2007-01-31 Exxonmobil Chem Patents Inc Oligomerisation of olefins
CA2692033C (en) * 2007-06-13 2016-07-19 Exxonmobil Research And Engineering Company Integrated hydroprocessing with high productivity catalysts
US8193402B2 (en) * 2007-12-03 2012-06-05 Gevo, Inc. Renewable compositions
EP2225351A4 (de) 2007-12-03 2016-11-09 Gevo Inc Erneuerbare zusammensetzungen
US7956227B2 (en) * 2007-12-06 2011-06-07 Conocophillips Company Oligomerization of hydrocarbons
IT1393109B1 (it) * 2009-02-26 2012-04-11 Eni Spa Procedimento per la conversione diretta di composti ossigenati a idrocarburi liquidi a ridotto tenore di aromatici
US8395006B2 (en) 2009-03-13 2013-03-12 Exxonmobil Research And Engineering Company Process for making high octane gasoline with reduced benzene content by benzene alkylation at high benzene conversion
US8853117B2 (en) 2009-08-28 2014-10-07 Exxonmobil Chemical Patents Inc. Method of making a molecular sieve of MFS framework type with controllable average size
CN102656191B (zh) 2009-12-15 2014-03-19 埃克森美孚化学专利公司 低聚方法和反应器的温度控制
EP2521705A4 (de) 2010-01-08 2014-06-18 Gevo Inc Integrierte verfahren zur herstellung erneuerbarer chemikalien
DE102010005704A1 (de) 2010-01-26 2011-07-28 Süd-Chemie AG, 80333 Verbesserter Katalysator auf Zeolithbasis zur Herstellung von Olefinen und zur Oligomerisierung von Olefinen
WO2011140560A1 (en) 2010-05-07 2011-11-10 Gevo, Inc. Renewable jet fuel blendstock from isobutanol
US20120022224A1 (en) 2010-07-22 2012-01-26 Geraldine Tosin Particles Including Zeolite Catalysts And Their Use In Oligomerization Processes
WO2012033562A1 (en) 2010-09-07 2012-03-15 Exxonmobil Chemical Patents Inc. Extrudates including zeolite catalysts and their use in oligomerization processes
WO2012145495A2 (en) 2011-04-19 2012-10-26 Gevo, Inc. Variations on prins-like chemistry to produce 2,5-dimethylhexadiene from isobutanol
US9573861B2 (en) 2011-07-25 2017-02-21 Exxonmobil Chemical Patents Inc. Olefin oligomerization process
WO2013013884A2 (en) 2011-07-25 2013-01-31 Exxonmobil Chemical Patents Inc. Process for nitrile removal from hydrocarbon feeds
WO2013013888A2 (en) 2011-07-25 2013-01-31 Exxonmobil Chemical Patents Inc. Olefin oligomerization process
EP2736632B1 (de) 2011-07-25 2017-02-01 ExxonMobil Chemical Patents Inc. Integriertes nitrilgiftadsorptions- und -desorptionssystem
US9550705B2 (en) 2011-07-25 2017-01-24 Exxonmobill Chemical Patents Inc. Olefin oligomerization process
EP2773601B1 (de) 2011-10-31 2016-03-09 ExxonMobil Chemical Patents Inc. Oligomerisationsverfahren für olefine
US8999013B2 (en) * 2011-11-01 2015-04-07 Saudi Arabian Oil Company Method for contemporaneously dimerizing and hydrating a feed having butene
US9522373B2 (en) * 2012-11-12 2016-12-20 Uop Llc Apparatus for oligomerizing light olefins
CN104812874B (zh) * 2012-11-29 2016-12-07 埃克森美孚化学专利公司 处理烯烃进料物流的方法和相关的低聚方法
FR3017622B1 (fr) 2014-02-19 2017-05-26 Ifp Energies Now Procede d'oligomerisation d'olefines utilisant un catalyseur comprenant une zeolithe et un liant silicique ayant subi une etape de traitement thermique specifique
WO2016150529A1 (en) 2015-03-20 2016-09-29 Exxonmobil Chemical Patents Inc. Process for converting an olefin containing hydrocarbon feed into an oligomerization product or a hydrogenated oligomerization product
US10544068B2 (en) * 2016-08-16 2020-01-28 Iran Polymer And Petrochemical Institute Catalytic process for producing olefins
WO2018236471A1 (en) 2017-06-23 2018-12-27 Exxonmobil Chemical Patents Inc. METHODS OF OLIGOMERIZING OLEFINS AND ZEOLITES AND STRUCTURAL ORIENTATION AGENTS THEREOF
WO2019051101A1 (en) * 2017-09-07 2019-03-14 Purdue Research Foundation PROCESS FOR THE VALORISATION OF NATURAL GAS LIQUIDS: A TWO STEP CATALYTIC PROCESS FOR DEHYDROGENATION OF ALKANES AND OLIGOMERISATION
CN112867701A (zh) 2018-10-17 2021-05-28 埃克森美孚化学专利公司 烯烃的低聚
WO2020081212A1 (en) 2018-10-17 2020-04-23 Exxonmobil Chemical Patents Inc. Oligomerization of olefins
WO2020081210A1 (en) * 2018-10-17 2020-04-23 Exxonmobil Chemical Patents Inc. Oligomerization of olefins
JP2021028312A (ja) * 2019-08-09 2021-02-25 出光興産株式会社 プロピレン３量体及びプロピレン３量体の製造方法
WO2021029377A1 (ja) * 2019-08-09 2021-02-18 出光興産株式会社 プロピレン４量体及びプロピレン４量体の製造方法
KR20220083701A (ko) * 2019-10-18 2022-06-20 이데미쓰 고산 가부시키가이샤 프로필렌 올리고머의 제조 방법

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3992466A (en) * 1975-08-13 1976-11-16 Mobil Oil Corporation Hydrocarbon conversion
US4160788A (en) * 1978-08-24 1979-07-10 Mobil Oil Corporation Disproportionation of toluene
AU527116B2 (en) * 1978-11-13 1983-02-17 Mobil Oil Corp. Method for synthesis of zeolite zsm-5
NZ202099A (en) * 1981-10-21 1986-07-11 Ici Plc Preparation of zeolite nu-10
US4902406A (en) * 1982-04-30 1990-02-20 Mobil Oil Corporation Synthesis of zeolite ZSM-22
US4481177A (en) * 1982-12-09 1984-11-06 Mobil Oil Corporation Synthesis of zeolite ZSM-22 with a heterocyclic organic compound
US4746762A (en) * 1985-01-17 1988-05-24 Mobil Oil Corporation Upgrading light olefins in a turbulent fluidized catalyst bed reactor
LU86280A1 (fr) * 1986-01-29 1987-09-03 Labofina Sa Procede de production d'essence
US4826804A (en) * 1987-06-04 1989-05-02 Uop Catalyst for oligomerization process
US4754096A (en) * 1987-07-13 1988-06-28 Mobil Oil Corporation Production of high viscosity index lubricating oils from lower olefins
US4777316A (en) * 1987-11-10 1988-10-11 Mobil Oil Corporation Manufacture of distillate hydrocarbons from light olefins in staged reactors
US4831205A (en) * 1987-12-16 1989-05-16 Mobil Oil Corporation Catalytic conversion of light olefinic feedstocks in a FCC plant
US4868146A (en) * 1987-12-23 1989-09-19 Mobil Oil Corporation Zeolite catalyst composition and synthesis method
US4788374A (en) * 1987-12-23 1988-11-29 Mobil Oil Corporation Zeolite catalysis
US4788366A (en) * 1987-12-28 1988-11-29 Mobil Oil Corporation Production of heavier hydrocarbons from light olefins in multistage catalytic reactors
AU3346689A (en) * 1988-02-19 1989-09-06 Mobil Oil Corporation Process for the production of gasoline from fuel gas and catalytic reformate
EP0377306B1 (de) * 1989-01-03 1992-08-19 Mobil Oil Corporation Verfahren zur Herstellung von hydrierten Cooligomeren
US5043499A (en) * 1990-02-15 1991-08-27 Mobil Oil Corporation Fluid bed oligomerization of olefins

Also Published As

Publication number Publication date
DE69312268D1 (de) 1997-08-21
US5672800A (en) 1997-09-30
JPH07503745A (ja) 1995-04-20
CA2128624A1 (en) 1993-08-19
EP0757976A3 (de) 1998-01-28
ZA93594B (en) 1993-08-31
EP0625132A1 (de) 1994-11-23
WO1993016020A3 (en) 1993-09-16
EP0757976A2 (de) 1997-02-12
CA2128624C (en) 2001-11-20
EP0625132B1 (de) 1997-07-16
DE69312268T2 (de) 1997-12-18
JP2901347B2 (ja) 1999-06-07
WO1993016020A2 (en) 1993-08-19

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