FI860723A - Foerfarande i flera steg foer polymerisation av -olefiner i gasfaser. - Google Patents

Foerfarande i flera steg foer polymerisation av -olefiner i gasfaser. Download PDF

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Publication number
FI860723A
FI860723A FI860723A FI860723A FI860723A FI 860723 A FI860723 A FI 860723A FI 860723 A FI860723 A FI 860723A FI 860723 A FI860723 A FI 860723A FI 860723 A FI860723 A FI 860723A
Authority
FI
Finland
Prior art keywords
polymerisation
gasfaser
olefiner
flera
steg
Prior art date
Application number
FI860723A
Other languages
English (en)
Other versions
FI81811B (fi
FI860723A0 (fi
FI81811C (fi
Inventor
Charles Raufast
Original Assignee
Bp Chem Int Ltd
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9316406&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=FI860723(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Bp Chem Int Ltd filed Critical Bp Chem Int Ltd
Publication of FI860723A0 publication Critical patent/FI860723A0/fi
Publication of FI860723A publication Critical patent/FI860723A/fi
Publication of FI81811B publication Critical patent/FI81811B/fi
Application granted granted Critical
Publication of FI81811C publication Critical patent/FI81811C/fi

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/34—Polymerisation in gaseous state
    • 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
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
    • B01J8/26—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with two or more fluidised beds, e.g. reactor and regeneration installations
    • 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
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/0015—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor
    • 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
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/005—Separating solid material from the gas/liquid stream
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F10/02—Ethene
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S526/00—Synthetic resins or natural rubbers -- part of the class 520 series
    • Y10S526/901—Monomer polymerized in vapor state in presence of transition metal containing catalyst

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Polymerisation Methods In General (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Lubricants (AREA)
  • Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
FI860723A 1985-02-19 1986-02-18 Foerfarande i flera steg foer polymerisation av alfa-olefiner i gasfaser och vid foerfarandet anvaendbar apparatur FI81811C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8502345A FR2577558B1 (fr) 1985-02-19 1985-02-19 Polymerisation en plusieurs etapes d'alpha-olefines en phase gazeuse
FR8502345 1985-02-19

Publications (4)

Publication Number Publication Date
FI860723A0 FI860723A0 (fi) 1986-02-18
FI860723A true FI860723A (fi) 1986-08-20
FI81811B FI81811B (fi) 1990-08-31
FI81811C FI81811C (fi) 1998-01-21

Family

ID=9316406

Family Applications (1)

Application Number Title Priority Date Filing Date
FI860723A FI81811C (fi) 1985-02-19 1986-02-18 Foerfarande i flera steg foer polymerisation av alfa-olefiner i gasfaser och vid foerfarandet anvaendbar apparatur

Country Status (15)

Country Link
US (2) US4703094A (fi)
EP (1) EP0192427B1 (fi)
JP (1) JPH0667977B2 (fi)
KR (1) KR930012266B1 (fi)
AT (1) ATE44157T1 (fi)
AU (1) AU591650B2 (fi)
CA (1) CA1248692A (fi)
DE (1) DE3664050D1 (fi)
ES (1) ES8707976A1 (fi)
FI (1) FI81811C (fi)
FR (1) FR2577558B1 (fi)
NO (1) NO165845C (fi)
NZ (1) NZ215189A (fi)
PT (1) PT82040B (fi)
ZA (1) ZA861201B (fi)

Families Citing this family (79)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5208109A (en) * 1982-06-24 1993-05-04 Bp Chemicals Limited Process for the polymerization and copolymerization of alpha-olefins in a fluidized bed
US5047468A (en) * 1988-11-16 1991-09-10 Union Carbide Chemicals And Plastics Technology Corporation Process for the in situ blending of polymers
US5126398A (en) * 1988-11-16 1992-06-30 Union Carbide Chemicals & Plastics Technology Corporation Process for the in situ blending of polymers
US5149738A (en) * 1988-11-16 1992-09-22 Union Carbide Chemicals & Plastics Technology Corporation Process for the in situ blending of polymers
DE3904079A1 (de) * 1989-02-11 1990-08-23 Basf Ag Verfahren zur herstellung von propylen-ethylen-copolymerisaten
US6025448A (en) 1989-08-31 2000-02-15 The Dow Chemical Company Gas phase polymerization of olefins
US5235009A (en) * 1989-10-16 1993-08-10 Phillips Petroleum Company Gas phase polymerization in multi-stage fluid beds
US5032562A (en) * 1989-12-27 1991-07-16 Mobil Oil Corporation Catalyst composition and process for polymerizing polymers having multimodal molecular weight distribution
DE4019053A1 (de) * 1990-06-15 1991-12-19 Basf Ag Polymerisate des propylens mit breitem molmassenverhaeltnis q
US5242661A (en) * 1990-06-28 1993-09-07 Liquid Carbonic, Inc. Apparatus for direct fluorination of polymeric resins
US6538080B1 (en) 1990-07-03 2003-03-25 Bp Chemicals Limited Gas phase polymerization of olefins
FR2664506B1 (fr) * 1990-07-13 1993-05-07 Bp Chemicals Snc Procede et dispositif d'introduction d'une poudre dans un reacteur.
TW203062B (fi) * 1990-11-15 1993-04-01 Sumitomo Chemical Co
WO1992009638A1 (en) * 1990-12-03 1992-06-11 Okhtinskoe Nauchno-Proizvodstvennoe Obiedinenie 'plastpolimer' Method for starting a reactor for catalytic gas-phase polymerization of olefins
US6316546B1 (en) 1991-03-06 2001-11-13 Exxonmobil Oil Corporation Ethylene polymer film resins
US6194520B1 (en) 1991-03-06 2001-02-27 Mobil Oil Corporation Ethylene polymer resins for blow molding applications
US5688865A (en) * 1991-03-06 1997-11-18 Mobil Oil Corporation Process and system for preventing pressure tap fouling in tandem polymerization reactors
IT1246614B (it) 1991-06-03 1994-11-24 Himont Inc Procedimento per la polimerizzazione in fase gas delle olefine
US5693583A (en) * 1991-06-10 1997-12-02 Mobil Oil Corporation High activity polyethylene catalysts which produce bimodal or trimodal product molecular weight distributions
DE69232109T2 (de) * 1991-07-24 2002-03-14 Mobil Oil Corp Verbesserte Polyethylenharze für Filme
FR2680792B1 (fr) * 1991-08-30 1994-09-09 Bp Chemicals Snc Procede de fabrication d'un polymere de l'ethylene.
ES2114969T3 (es) * 1992-06-18 1998-06-16 Montell Technology Company Bv Procedimiento y aparato para la polimerizacion en fase gaseosa de olefinas.
US5284613A (en) * 1992-09-04 1994-02-08 Mobil Oil Corporation Producing blown film and blends from bimodal high density high molecular weight film resin using magnesium oxide-supported Ziegler catalyst
US5705576A (en) * 1992-11-12 1998-01-06 Quantum Chemical Corporation Process for controlling production of in-situ thermoplastic polyolefins and products
US5587436A (en) * 1992-11-12 1996-12-24 Quantum Chemical Corporation Process for controlling the polymerization of propylene and ethylene and copolymer products
US5314746A (en) * 1992-11-12 1994-05-24 Quantum Chemical Corporation Soft, puncture- and tear-resistant polyolefin films
CA2102542A1 (en) * 1992-11-12 1994-05-13 Thaddeus W. Klimek Gas-phase process for producing copolymer of propylene and ethylene and polyolefin films made therefrom
IT1256648B (it) * 1992-12-11 1995-12-12 Montecatini Tecnologie Srl Componenti e catalizzatori per la polimerizzazione delle olefine
US5420220A (en) * 1993-03-25 1995-05-30 Mobil Oil Corporation LLDPE films
US5332706A (en) * 1992-12-28 1994-07-26 Mobil Oil Corporation Process and a catalyst for preventing reactor fouling
US5602067A (en) * 1992-12-28 1997-02-11 Mobil Oil Corporation Process and a catalyst for preventing reactor fouling
US5558472A (en) * 1993-10-07 1996-09-24 Sumitomo Chemical Company, Limited Method and apparatus for transporting particles
WO1995011264A1 (en) * 1993-10-21 1995-04-27 Mobil Oil Corporation Polyolefin blends of bimodal molecular weight distribution
US5614456A (en) * 1993-11-15 1997-03-25 Mobil Oil Corporation Catalyst for bimodal molecular weight distribution ethylene polymers and copolymers
US5525678A (en) * 1994-09-22 1996-06-11 Mobil Oil Corporation Process for controlling the MWD of a broad/bimodal resin produced in a single reactor
ES2116188B1 (es) 1994-12-30 1999-04-01 Repsol Quimica Sa Proceso de obtencion de poliolefinas con distribuciones de pesos moleculares anchas, bimodales o multimodales.
BE1009308A3 (fr) * 1995-04-28 1997-02-04 Solvay Polymere d'ethylene et procedes pour son obtention.
DE19522283A1 (de) * 1995-06-20 1997-01-02 Basf Ag Vorrichtung zurGasphasenpolymerisation von C¶2¶-C¶8¶-Alk-1-enen
US5882750A (en) * 1995-07-03 1999-03-16 Mobil Oil Corporation Single reactor bimodal HMW-HDPE film resin with improved bubble stability
IT1275573B (it) * 1995-07-20 1997-08-07 Spherilene Spa Processo ed apparecchiatura per la pomimerizzazione in fase gas delle alfa-olefine
US6486089B1 (en) 1995-11-09 2002-11-26 Exxonmobil Oil Corporation Bimetallic catalyst for ethylene polymerization reactions with uniform component distribution
US5665818A (en) * 1996-03-05 1997-09-09 Union Carbide Chemicals & Plastics Technology Corporation High activity staged reactor process
US6417130B1 (en) 1996-03-25 2002-07-09 Exxonmobil Oil Corporation One pot preparation of bimetallic catalysts for ethylene 1-olefin copolymerization
CA2259999A1 (en) * 1996-07-15 1998-01-22 Mobil Oil Corporation Comonomer pretreated bimetallic catalyst for blow molding and film applications
US6069212A (en) * 1996-08-20 2000-05-30 Bp Amoco Corporation Transfer of polymer particles between vapor phase polymerization reactors containing quench-cooled subfluidized particulate beds of polymerized monomer
DE19728141A1 (de) 1997-07-02 1999-01-07 Basf Ag Verfahren zur Polymerisation von C2-C8-Alk-1-enen mittels eines Ziegler-Natta-Katalysatorsystems
US6051525A (en) * 1997-07-14 2000-04-18 Mobil Corporation Catalyst for the manufacture of polyethylene with a broad or bimodal molecular weight distribution
US6153551A (en) * 1997-07-14 2000-11-28 Mobil Oil Corporation Preparation of supported catalyst using trialkylaluminum-metallocene contact products
BE1011332A3 (fr) * 1997-08-20 1999-07-06 Solvay Dispositif de dechargement d'un reacteur de polymerisation a lit fluidise.
US6112777A (en) * 1998-11-19 2000-09-05 Union Carbide Chemicals & Plastics Technology Corporation Process for bulk handling elastomeric materials via temperature control
KR100503137B1 (ko) * 1999-03-31 2005-07-25 미쓰이 가가쿠 가부시키가이샤 다단 기상 중합 방법, 다단 기상 중합 장치 및 다단 기상중합 장치에서의 중합체 분말 내의 부성분 동반량 저감 장치
AU6163000A (en) * 1999-07-08 2001-01-30 Borealis Technology Oy Process for producing polypropylene
US6403520B1 (en) 1999-09-17 2002-06-11 Saudi Basic Industries Corporation Catalyst compositions for polymerizing olefins to multimodal molecular weight distribution polymer, processes for production and use of the catalyst
US6294626B1 (en) 1999-11-15 2001-09-25 Equistar Chemicals, Lp Olefin polymerization catalysts containing modified boraaryl ligands
US6359083B1 (en) 2000-05-02 2002-03-19 Eastman Chemical Company Olefin polymerization process
DE10025727A1 (de) * 2000-05-25 2002-01-03 Basell Polypropylen Gmbh Hochfließfähige Propylenblockcopolymerisate
US6444765B1 (en) 2000-06-14 2002-09-03 Equistar Chemicals, Lp Olefin polymerization process for producing broad MWD polymers
US6812304B2 (en) 2000-06-14 2004-11-02 Equistar Chemicals, Lp Process for producing improved premixed supported boraaryl catalysts
BR0214577A (pt) 2001-11-30 2004-11-03 Exxonmobil Chem Patents Inc Copolìmero de etileno/alfa-olefina feito com uma combinação de um catalisador de sìtio-único/sìtio-não-único, sua preparação e uso
US6914104B2 (en) * 2002-04-19 2005-07-05 Sumitomo Chemical Company, Limited Process for polymerization of α-olefin
EP1384751A1 (en) * 2002-07-25 2004-01-28 SOLVAY POLYOLEFINS EUROPE - BELGIUM (Société Anonyme) Container formed from multimodal ethylene polymer
TW200504093A (en) * 2003-05-12 2005-02-01 Dow Global Technologies Inc Polymer composition and process to manufacture high molecular weight-high density polyethylene and film therefrom
SG119367A1 (en) * 2004-07-16 2006-02-28 Sumitomo Chemical Co Apparatus for continuous polymerization of olefin method for transferring a polymer powder and method for continuous polymerization of olefin
EP1630178A1 (en) 2004-08-10 2006-03-01 Innovene Manufacturing Belgium NV Polymerisation process
US7662894B2 (en) * 2006-12-19 2010-02-16 Saudi Bosic Industries Corporation Polymer supported metallocene catalyst composition for polymerizing olefins
DE102007014621A1 (de) 2007-03-23 2008-09-25 Innogel Ag Verfahren zur Herstellung von Molekulargewichtsverteilungen mit kurzkettigem Anteil mittels Post-Reaktor Extrusion
ATE549080T1 (de) * 2007-09-19 2012-03-15 Basell Poliolefine Srl Mehrstufiges verfahren zur polymerisation von olefinen
CN103554324B (zh) 2010-04-30 2016-02-03 大林产业株式会社 α-烯烃的气相聚合
EP2602269A1 (en) 2011-12-06 2013-06-12 Basell Polyolefine GmbH Multistage process for the polymerization of olefins
CN103772535B (zh) * 2012-10-18 2016-03-30 中国石油化工股份有限公司 烯烃聚合装置及其在聚合物转移及单体回收中的应用
EP2803680A1 (en) * 2013-05-16 2014-11-19 Basell Polyolefine GmbH Multistage process for the polymerization of olefins
US9079993B1 (en) * 2014-05-22 2015-07-14 Chevron Phillips Chemical Company Lp High clarity low haze compositions
KR20160077702A (ko) 2014-12-24 2016-07-04 한화토탈 주식회사 연속 중합 공정에서의 폴리올레핀 이송 방법
KR102070309B1 (ko) * 2015-11-13 2020-01-28 주식회사 엘지화학 공액디엔 제조장치 및 제조방법
JP6902965B2 (ja) 2017-08-29 2021-07-14 住友化学株式会社 ポリオレフィンの製造方法
US11168157B2 (en) 2018-12-04 2021-11-09 Chevron Phillips Chemical Company Lp Melt flow index response in polyethylene reactors
BR112021010757A2 (pt) * 2018-12-18 2021-08-31 Basell Polyolefine Gmbh Processo para a preparação de um polímero de etileno
US11608392B2 (en) 2020-11-17 2023-03-21 Ineos Usa Llc Polymerization process
EP4144435A1 (en) * 2021-09-01 2023-03-08 Borealis AG Gas phase polymerization process with improved gas recycling

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3894998A (en) * 1973-01-11 1975-07-15 Du Pont Multiple stage reactor system
JPS56166208A (en) * 1980-05-27 1981-12-21 Mitsui Petrochem Ind Ltd Gas-phase polymerization of olefin
JPS56166207A (en) * 1980-05-27 1981-12-21 Mitsui Petrochem Ind Ltd Gas-phase polymerization of olefin
JPS6045645B2 (ja) * 1980-10-09 1985-10-11 三井化学株式会社 オレフイン類の気相重合方法
JPS59230010A (ja) * 1983-06-11 1984-12-24 Chisso Corp 気相多段重合方法

Also Published As

Publication number Publication date
ES8707976A1 (es) 1987-09-01
FR2577558B1 (fr) 1987-03-06
EP0192427A1 (en) 1986-08-27
US4902483A (en) 1990-02-20
PT82040B (pt) 1988-05-27
JPS61200104A (ja) 1986-09-04
FI81811B (fi) 1990-08-31
PT82040A (en) 1986-03-01
FR2577558A1 (fr) 1986-08-22
NO860606L (no) 1986-08-20
ATE44157T1 (de) 1989-07-15
NO165845C (no) 1991-04-17
NO165845B (no) 1991-01-07
KR930012266B1 (ko) 1993-12-28
JPH0667977B2 (ja) 1994-08-31
EP0192427B1 (en) 1989-06-21
US4703094A (en) 1987-10-27
NZ215189A (en) 1988-07-28
DE3664050D1 (en) 1989-07-27
KR860006492A (ko) 1986-09-11
ES552180A0 (es) 1987-09-01
CA1248692A (en) 1989-01-10
FI860723A0 (fi) 1986-02-18
FI81811C (fi) 1998-01-21
AU591650B2 (en) 1989-12-14
AU5370186A (en) 1986-08-28
ZA861201B (en) 1987-10-28

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