ES2121299T3 - Procedimiento de polimerizacion en lecho fluidizado de olefinas que utilizan ondas acusticas. - Google Patents

Procedimiento de polimerizacion en lecho fluidizado de olefinas que utilizan ondas acusticas.

Info

Publication number
ES2121299T3
ES2121299T3 ES95304918T ES95304918T ES2121299T3 ES 2121299 T3 ES2121299 T3 ES 2121299T3 ES 95304918 T ES95304918 T ES 95304918T ES 95304918 T ES95304918 T ES 95304918T ES 2121299 T3 ES2121299 T3 ES 2121299T3
Authority
ES
Spain
Prior art keywords
olefins
fluidized bed
acoustic waves
polymerization procedure
reactor system
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
ES95304918T
Other languages
English (en)
Inventor
Gyung-Ho Song
Kiu Hee Lee
Roger Brady Painter
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.)
Union Carbide Chemicals and Plastics Technology LLC
Original Assignee
Union Carbide Chemicals and Plastics Technology LLC
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 Union Carbide Chemicals and Plastics Technology LLC filed Critical Union Carbide Chemicals and Plastics Technology LLC
Application granted granted Critical
Publication of ES2121299T3 publication Critical patent/ES2121299T3/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
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/1809Controlling processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/24Chemical 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
    • B01J8/40Chemical 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 fluidised bed subjected to vibrations or pulsations
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F210/00Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F210/16Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
    • C08F210/18Copolymers of ethene with alpha-alkenes, e.g. EP rubbers with non-conjugated dienes, e.g. EPT rubbers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049Controlling or regulating processes
    • B01J2219/00245Avoiding undesirable reactions or side-effects
    • B01J2219/00247Fouling of the reactor or the process equipment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049Controlling or regulating processes
    • B01J2219/00245Avoiding undesirable reactions or side-effects
    • B01J2219/00254Formation of unwanted polymer, such as "pop-corn"
    • 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S526/00Synthetic resins or natural rubbers -- part of the class 520 series
    • Y10S526/901Monomer polymerized in vapor state in presence of transition metal containing catalyst

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (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)

Abstract

UN METODO MEJORADO PARA LA POLIMERIZACION DE UNA O MAS POLIOLEFINAS EN PRESENCIA DE UN CATALIZADOR DE METALES DE TRANSICION EN AL MENOS UN REACTOR DE LECHO FLUIDIFICADO DE FASE DE GAS, EN DONDE LA MEJORA CONSISTE EN GENERAR AL MENOS UNA ONDA SONORA DE BAJA FRECUENCIA Y ALTA PRESION DENTRO DEL SISTEMA REACTOR, CUYA ONDA TENGA UNA FRECUENCIA Y PRESION SUFICIENTES COMO PARA RETIRAR Y/O PREVENIR LA FORMACION DE PARTICULAS EN LAS SUPERFICIES INTERIORES DEL SISTEMA REACTOR.
ES95304918T 1994-07-14 1995-07-13 Procedimiento de polimerizacion en lecho fluidizado de olefinas que utilizan ondas acusticas. Expired - Lifetime ES2121299T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/274,840 US5461123A (en) 1994-07-14 1994-07-14 Gas phase fluidized bed polyolefin polymerization process using sound waves

Publications (1)

Publication Number Publication Date
ES2121299T3 true ES2121299T3 (es) 1998-11-16

Family

ID=23049819

Family Applications (1)

Application Number Title Priority Date Filing Date
ES95304918T Expired - Lifetime ES2121299T3 (es) 1994-07-14 1995-07-13 Procedimiento de polimerizacion en lecho fluidizado de olefinas que utilizan ondas acusticas.

Country Status (9)

Country Link
US (1) US5461123A (es)
EP (1) EP0692500B1 (es)
JP (1) JP2978091B2 (es)
AT (1) ATE170535T1 (es)
AU (1) AU686383B2 (es)
BR (1) BR9503324A (es)
CA (1) CA2153916C (es)
DE (1) DE69504438T2 (es)
ES (1) ES2121299T3 (es)

Families Citing this family (69)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5969061A (en) * 1995-10-16 1999-10-19 Eastman Chemical Company Suppression of fines in a fluid bed polyethylene process
US5866661A (en) * 1996-12-13 1999-02-02 Phillips Petroleum Company Ethylene polymerization processes and products thereof
FR2757784B1 (fr) * 1996-12-27 1999-01-29 Bp Chemicals Snc Procede de traitement au moyen de vibrations de la paroi d'un reacteur a lit fluidise de polymerisation en phase gazeuse
US5912309A (en) * 1997-07-16 1999-06-15 Union Carbide Chemicals & Plastics Technology Corporation Gas phase fluidized bed polymerization process using sonic cleaner with optimum design and operation
AU8488198A (en) * 1997-07-16 1999-02-10 Union Carbide Chemicals & Plastics Technology Corporation Low bed-level transition, start-up, and reactor residence time control using sound waves
US6635715B1 (en) 1997-08-12 2003-10-21 Sudhin Datta Thermoplastic polymer blends of isotactic polypropylene and alpha-olefin/propylene copolymers
US6921794B2 (en) 1997-08-12 2005-07-26 Exxonmobil Chemical Patents Inc. Blends made from propylene ethylene polymers
US7232871B2 (en) 1997-08-12 2007-06-19 Exxonmobil Chemical Patents Inc. Propylene ethylene polymers and production process
DE19744710A1 (de) * 1997-10-10 1999-04-15 Bayer Ag Gasphasenpolymerisation in einem Kelchreaktor
US6977283B1 (en) 1998-04-07 2005-12-20 Exxonmobil Chemical Patents Inc. Polymerization process
TW475934B (en) * 1998-06-27 2002-02-11 Basell Technology Co Bv Process for the production of Α-olefin polymer
JP2002519497A (ja) 1998-07-01 2002-07-02 エクソンモービル・ケミカル・パテンツ・インク 結晶性プロピレンポリマーと結晶化可能プロピレンポリマーとを含んでなる弾性ブレンド
US7354880B2 (en) * 1998-07-10 2008-04-08 Univation Technologies, Llc Catalyst composition and methods for its preparation and use in a polymerization process
DE69943133D1 (de) 1998-11-02 2011-02-24 Dow Global Technologies Inc Unter scherwirkung verflüssigbare ethylen/alpha-olefin/dien polymere und ihre herstellung
WO2000032652A1 (en) * 1998-12-02 2000-06-08 Union Carbide Chemicals & Plastics Technology Corporation Process to improve reactor operation
US6359083B1 (en) 2000-05-02 2002-03-19 Eastman Chemical Company Olefin polymerization process
US6593267B2 (en) 2000-12-18 2003-07-15 Univation Technologies, Llc Method for preparing a supported catalyst system and its use in a polymerization process
US6933258B2 (en) 2000-12-19 2005-08-23 Univation Technologies, L.L.C. Catalyst composition and methods for its preparation and use in a polymerization process
JP2002265507A (ja) 2001-03-09 2002-09-18 Sumitomo Chem Co Ltd オレフィンの気相流動床式重合反応におけるシーティング防止
DE60238049D1 (de) 2001-04-12 2010-12-02 Exxonmobil Chem Patents Inc Verfahren zur Polymerisation von Propylen und Ethylen in Lösung
AU2002344994A1 (en) * 2001-06-01 2003-02-17 Borealis Technology Oy Polymerisation method and device for carrying out a polymerisation method
US6927256B2 (en) 2001-11-06 2005-08-09 Dow Global Technologies Inc. Crystallization of polypropylene using a semi-crystalline, branched or coupled nucleating agent
EP1444276A1 (en) 2001-11-06 2004-08-11 Dow Global Technologies, Inc. Isotactic propylene copolymers, their preparation and use
US6914104B2 (en) * 2002-04-19 2005-07-05 Sumitomo Chemical Company, Limited Process for polymerization of α-olefin
US7579407B2 (en) 2002-11-05 2009-08-25 Dow Global Technologies Inc. Thermoplastic elastomer compositions
US7459500B2 (en) 2002-11-05 2008-12-02 Dow Global Technologies Inc. Thermoplastic elastomer compositions
WO2004094487A1 (en) * 2003-03-21 2004-11-04 Dow Global Technologies, Inc. Morphology controlled olefin polymerization process
JP2006522189A (ja) 2003-04-03 2006-09-28 バーゼル・ポリオレフィン・ゲーエムベーハー 気相流動床反応器内における有機遷移金属化合物存在下での高分子量ポリオレフィンの製造
US7393910B2 (en) 2003-09-23 2008-07-01 Dow Global Technologies Inc. Catalyst composition for ethylene polymerization
US20070073012A1 (en) * 2005-09-28 2007-03-29 Pannell Richard B Method for seed bed treatment before a polymerization reaction
US7985811B2 (en) * 2004-01-02 2011-07-26 Univation Technologies, Llc Method for controlling sheeting in gas phase reactors
US20050148742A1 (en) * 2004-01-02 2005-07-07 Hagerty Robert O. Method for controlling sheeting in gas phase reactors
WO2005092503A1 (en) * 2004-03-16 2005-10-06 Union Carbide Chemicals & Plastics Technology Corporation Aluminum phosphate-supported group 6 metal amide catalysts for oligomerization of ethylene
SG151301A1 (en) 2004-03-17 2009-04-30 Dow Global Technologies Inc Catalyst composition comprising shuttling agent for ethylene multi- block copolymer formation
NZ549262A (en) 2004-03-17 2010-08-27 Dow Global Technologies Inc Catalyst composition comprising shuttling agent for higher olefin multi-block copolymer formation
SG151310A1 (en) 2004-03-17 2009-04-30 Dow Global Technologies Inc Catalyst composition comprising shuttling agent for ethylene copolymer formation
WO2006020624A1 (en) * 2004-08-09 2006-02-23 Dow Global Technologies Inc. Supported bis(hydroxyarylaryloxy) catalysts for manufacture of polymers
US20060130870A1 (en) * 2004-12-21 2006-06-22 Ping Cai Method for sonic cleaning of reactor with reduced acoustic wave cancellation
US6987152B1 (en) 2005-01-11 2006-01-17 Univation Technologies, Llc Feed purification at ambient temperature
MX2007011337A (es) 2005-03-17 2007-10-02 Dow Global Technologies Inc Composicion de catalizador que comprende un agente de transporte para la formacion de copolimero de bloques multiples tactico/atactico.
US9410009B2 (en) 2005-03-17 2016-08-09 Dow Global Technologies Llc Catalyst composition comprising shuttling agent for tactic/ atactic multi-block copolymer formation
MX2007011340A (es) 2005-03-17 2007-10-03 Dow Global Technologies Inc Composicion de catalizador que comprende un agente de transporte para la formacion de copolimero de bloques multiples regio-irregular.
KR100668042B1 (ko) 2005-06-30 2007-01-15 서강대학교산학협력단 용융강도가 우수한 긴 곁가지를 갖는 폴리프로필렌 수지의 제조 방법
KR20080055837A (ko) * 2005-09-15 2008-06-19 다우 글로벌 테크놀로지스 인크. 중합가능한 셔틀링제를 통한 촉매성 올레핀 블럭 공중합체
AR058448A1 (es) 2005-09-15 2008-02-06 Dow Global Technologies Inc Control de arquitectura del polimero y distribucoin de peso molecular va el agente de transferencia multi- centrado
US20070270558A1 (en) * 2006-05-16 2007-11-22 Paul Keith Scherrer Pulsing olefin polymerization fluidized-bed reactors
ES2534469T3 (es) 2006-05-17 2015-04-23 Dow Global Technologies Llc Procedimiento de polimerización de polietileno en disolución a alta temperatura
US7867868B2 (en) * 2007-03-02 2011-01-11 Applied Materials, Inc. Absorber layer candidates and techniques for application
EP2183286B1 (en) * 2007-08-16 2012-12-12 Univation Technologies, LLC Continuity additives and their use in polymerization processes
TW200936564A (en) * 2007-11-15 2009-09-01 Univation Tech Llc Methods for the removal of impurities from polymerization feed streams
RU2486953C2 (ru) * 2008-04-22 2013-07-10 Юнивейшн Текнолоджиз, Ллк Реакторная система и способ ее использования
US20110256632A1 (en) 2009-01-08 2011-10-20 Univation Technologies, Llc Additive for Polyolefin Polymerization Processes
WO2010080871A1 (en) 2009-01-08 2010-07-15 Univation Technologies, Llc Additive for gas phase polymerization processes
EP3489264B1 (en) 2009-07-29 2021-08-25 Dow Global Technologies LLC Chain shuttling agents and their use for the preparation of block copolymers
US8513367B2 (en) 2010-11-19 2013-08-20 Exxonmobil Research And Engineering Company Mitigation of elastomer reactor fouling using mechanical vibration
CN103347905B (zh) 2010-12-22 2015-12-16 尤尼威蒂恩技术有限责任公司 用于聚烯烃聚合方法的添加剂
KR101236645B1 (ko) 2010-12-31 2013-02-22 주식회사 효성 공정성이 우수한 연속식 파이프형 중합 반응 장치 및 이를 이용한 중합 방법
EP2610269A1 (en) 2011-12-28 2013-07-03 Saudi Basic Industries Corporation Catalyst composition and method for preparing the same
CA2933157C (en) 2013-12-09 2021-11-16 Univation Technologies, Llc Feeding polymerization additives to polymerization processes
WO2017058910A1 (en) 2015-09-30 2017-04-06 Dow Global Technologies Llc Multi- or dual-headed compositions useful for chain shuttling and process to prepare the same
JP7123040B2 (ja) 2016-09-30 2022-08-22 ダウ グローバル テクノロジーズ エルエルシー 連鎖シャトリングに有用な多頭または二頭組成物の調製方法
KR102444560B1 (ko) 2016-09-30 2022-09-20 다우 글로벌 테크놀로지스 엘엘씨 체인 셔틀링에 유용한 다중 또는 이중 헤드 구성 요소 및 이를 준비하는 과정
TWI756272B (zh) 2016-09-30 2022-03-01 美商陶氏全球科技有限責任公司 適用於鏈梭移之封端多頭或雙頭組合物及其製備方法
JP7028885B2 (ja) 2017-03-15 2022-03-02 ダウ グローバル テクノロジーズ エルエルシー マルチブロックコポリマー形成用触媒系
EP3596146B1 (en) 2017-03-15 2023-07-19 Dow Global Technologies LLC Catalyst system for multi-block copolymer formation
SG11201908518VA (en) 2017-03-15 2019-10-30 Dow Global Technologies Llc Catalyst system for multi-block copolymer formation
SG11201908414YA (en) 2017-03-15 2019-10-30 Dow Global Technologies Llc Catalyst system for multi-block copolymer formation
US11208502B2 (en) 2017-03-15 2021-12-28 Dow Global Technologies Llc Catalyst system for multi-block coploymer formation
KR102513518B1 (ko) 2020-12-23 2023-03-22 디엘케미칼 주식회사 메탈로센 올레핀 중합 공정용 대전방지제를 이용한 올레핀 중합 방법

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE7805006L (sv) * 1978-05-02 1979-11-03 Kockums Automation Sett vid sonikrensning
US4482687A (en) 1979-10-26 1984-11-13 Union Carbide Corporation Preparation of low-density ethylene copolymers in fluid bed reactor
US4405495A (en) 1980-06-30 1983-09-20 Union Carbide Corporation Catalyst impregnated on fine silica, process for preparing, and use for ethylene polymerization
FR2494814A1 (fr) * 1980-11-26 1982-05-28 Somafer Sa Ets Somalor Ferrari Procede de nettoyage des surfaces d'une installation, encrassees par des depots resultant de la combustion de matieres carbonees
US4668790A (en) 1981-12-23 1987-05-26 Ciba-Geigy Corporation Chromogenic dihydrofuropyridinones
AU1490183A (en) * 1982-07-19 1984-01-26 Babcock & Wilcox Co., The Cleaning drum-shaped filters
US4461651A (en) * 1983-02-08 1984-07-24 Foster Wheeler Limited Sonic cleaning device and method
US4508842A (en) 1983-03-29 1985-04-02 Union Carbide Corporation Ethylene polymerization using supported vanadium catalyst
JPS6079023A (ja) * 1983-10-05 1985-05-04 Kanegafuchi Chem Ind Co Ltd 新規な重合方法
SE458799B (sv) * 1983-12-02 1989-05-08 Insako Ab Saett och anordning foer foerbraenning av fluida braenslen
SE451115B (sv) 1985-01-16 1987-09-07 Ulveco Kockum Sonic Ab Anleggning for sotning av pannor eller liknande, innefattande ett flertal lagfrekvent ljud alstrande anordningar
US4849318A (en) * 1986-10-31 1989-07-18 Mita Industrial Co., Ltd. Processes for producing electrophotographic toner
US4803251A (en) * 1987-11-04 1989-02-07 Union Carbide Corporation Method for reducing sheeting during polymerization of alpha-olefins
US4994534A (en) 1989-09-28 1991-02-19 Union Carbide Chemicals And Plastics Company Inc. Process for producing sticky polymers
JPH03270730A (ja) * 1990-03-19 1991-12-02 Sanyo Chem Ind Ltd 化学反応方法
US5187246A (en) 1990-06-26 1993-02-16 Union Carbide Chemicals & Plastics Technology Corporation Process for making epr resins
US5162463A (en) 1990-12-10 1992-11-10 Union Carbide Chemicals & Plastics Technology Corporation Method for producing sticky polymers
US5137994A (en) 1991-05-23 1992-08-11 Union Carbide Chemicals & Plastics Technology Corporation Process for the simultaneous trimerization and copolymerization of ethylene
US5194526A (en) 1992-07-30 1993-03-16 Union Carbide Chemicals & Plastics Technology Corporation Process for producing sticky polymers

Also Published As

Publication number Publication date
JP2978091B2 (ja) 1999-11-15
BR9503324A (pt) 1996-04-30
ATE170535T1 (de) 1998-09-15
DE69504438D1 (de) 1998-10-08
AU686383B2 (en) 1998-02-05
EP0692500A1 (en) 1996-01-17
DE69504438T2 (de) 1999-01-14
AU2498195A (en) 1996-01-25
JPH08169915A (ja) 1996-07-02
CA2153916C (en) 1997-12-23
US5461123A (en) 1995-10-24
EP0692500B1 (en) 1998-09-02
CA2153916A1 (en) 1996-01-15

Similar Documents

Publication Publication Date Title
ES2121299T3 (es) Procedimiento de polimerizacion en lecho fluidizado de olefinas que utilizan ondas acusticas.
AU2500595A (en) Improved gas phase fluidized bed polyolefin polymerization process using gas-solids tangential flow
ATE185821T1 (de) Verfahren zur polymerisation von monomeren in wirbelbetten
MXPA00001277A (es) Radiador de sonido que comprende un sistema que incluye un numero de transductores acusticos.
CA2305653A1 (en) Methods and apparatus for blood speckle detection in an intravascular ultrasound imaging system
GB2232037B (en) Electroacoustic transducer,usable in particular as a source of acoustic waves for submarine applications
CA2100728A1 (en) Ultrasonic bathing system
PT970970E (pt) Processo para a polimerizacao de monomeros em leitos fluidificados
EP0644525A3 (en) Its audible inducing FM-theta and process, device and medium recorded for its generation.
CA2257301A1 (en) Acoustic condition sensor employing a plurality of mutually non-orthogonal waves
EP0973152A9 (en) Parametric audio system
CA2185790A1 (en) Apparatus and methods for including codes in audio signals and decoding
MXPA02004941A (es) Aparato para mejorar acusticamente un ambiente y metodo relacionado.
CA2134175A1 (en) Shock Wave Sterilizer
WO1990004359A3 (de) Vorrichtung zur erzeugung von fokussierten akustischen druckwellen
CA2306115A1 (en) Noise abatement for appliance
MX9709236A (es) Transductor de bocina acustica con un difusor tipo conico que tiene un perfil exponencial en madera.
ES2070486T3 (es) Filtro de reflector de ondas superficiales.
DK1147326T3 (da) Fremgangsmåde og anordning til reduktion eller forhindring af støjudvikling i friktionsbremser og -koblinger
CA2242610A1 (en) Sound reproducing speed converter
CA2238972A1 (en) Low frequency underwater sound source
NO944393D0 (no) Katalysatorsystem for polymeriseringen av alfa-olfiner, fremgangsmåte for polymeriseringen og polymerkomposittpulver
ES2183395T3 (es) Procedimiento mejorado de polimerizacion en lecho fluidizado en fase gaseosa utilizando un limpiador por sonidos con diseño y funcionamiento optimos.
DE69330382D1 (de) Gerät zur Erzeugung eines Auslösesignals, angewendet bei der Übertragung von Ultraschallwellen
MX171080B (es) Sistema de altoparlante

Legal Events

Date Code Title Description
FG2A Definitive protection

Ref document number: 692500

Country of ref document: ES