IN2004DE03899A - A method for the start-up of an epoxidation process and a process for the epoxidation of an olefin - Google Patents

A method for the start-up of an epoxidation process and a process for the epoxidation of an olefin

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Publication number
IN2004DE03899A
IN2004DE03899A IN3899DE2004A IN2004DE03899A IN 2004DE03899 A IN2004DE03899 A IN 2004DE03899A IN 3899DE2004 A IN3899DE2004 A IN 3899DE2004A IN 2004DE03899 A IN2004DE03899 A IN 2004DE03899A
Authority
IN
India
Prior art keywords
epoxidation
olefin
epoxidation process
Prior art date
Application number
Inventor
John Robert Lockemeyer
Wayne Errol Evans
Dominicus Maria Rekers
Arend Jan Te Raa
Thijs Wermink
Original Assignee
Shell Oil Co
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=30000918&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=IN2004DE03899(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Shell Oil Co filed Critical Shell Oil Co
Publication of IN2004DE03899A publication Critical patent/IN2004DE03899A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D301/00Preparation of oxiranes
    • C07D301/02Synthesis of the oxirane ring
    • C07D301/03Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds
    • C07D301/04Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with air or molecular oxygen
    • C07D301/08Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with air or molecular oxygen in the gaseous phase
    • C07D301/10Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with air or molecular oxygen in the gaseous phase with catalysts containing silver or gold

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Epoxy Compounds (AREA)
  • Catalysts (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
IN3899DE2004 2002-06-28 2004-12-08 A method for the start-up of an epoxidation process and a process for the epoxidation of an olefin IN2004DE03899A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US39267902P 2002-06-28 2002-06-28

Publications (1)

Publication Number Publication Date
IN2004DE03899A true IN2004DE03899A (en) 2009-11-20

Family

ID=30000918

Family Applications (1)

Application Number Title Priority Date Filing Date
IN3899DE2004 IN2004DE03899A (en) 2002-06-28 2004-12-08 A method for the start-up of an epoxidation process and a process for the epoxidation of an olefin

Country Status (15)

Country Link
US (1) US7102022B2 (en)
EP (1) EP1517901B1 (en)
JP (1) JP4578967B2 (en)
KR (1) KR101057864B1 (en)
CN (1) CN1665797B (en)
AU (1) AU2003247652A1 (en)
BR (2) BR0312010A (en)
CA (1) CA2494767C (en)
DE (1) DE60333292D1 (en)
IN (1) IN2004DE03899A (en)
MX (1) MX245604B (en)
MY (1) MY135031A (en)
RU (1) RU2005102097A (en)
TW (1) TWI283242B (en)
WO (1) WO2004002972A2 (en)

Families Citing this family (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR0312010A (en) 2002-06-28 2005-03-22 Shell Int Research Method for starting an epoxidation process and a process for an olefin epoxidation
CA2491523C (en) * 2002-06-28 2013-01-08 Shell Internationale Research Maatschappij B.V. A method for improving the selectivity of a catalyst and a process for the epoxidation of an olefin
TWI346574B (en) 2003-03-31 2011-08-11 Shell Int Research A catalyst composition, a process for preparing the catalyst composition and a use of the catalyst composition
US7348444B2 (en) 2003-04-07 2008-03-25 Shell Oil Company Process for the production of an olefin oxide
US8148555B2 (en) 2003-06-26 2012-04-03 Shell Oil Company Method for improving the selectivity of a catalyst and a process for the epoxidation of an olefin
RU2007111952A (en) * 2004-09-01 2008-10-10 Шелл Интернэшнл Рисерч Маатсхаппий Б.В. (NL) METHOD FOR EPOXIDATION OF OLEFINS, CATALYST FOR APPLICATION IN THIS METHOD, CARRIER FOR USE IN PRODUCTION OF CATALYST AND METHOD FOR PRODUCING CARRIER
US20070151451A1 (en) * 2005-12-22 2007-07-05 Rekers Dominicus M Process for the cooling, concentration or purification of ethylene oxide
US20070203350A1 (en) * 2005-12-22 2007-08-30 Bolk Jeroen W Method Of Installing An Epoxidation Catalyst In A Reactor, A Method Of Preparing An Epoxidation Catalyst, An Epoxidation Catalyst, A Process For The Preparation Of An Olefin Oxide Or A Chemical Derivable From An Olefin Oxide, And A Reactor Suitable For Such A Process
CA2571808A1 (en) * 2005-12-22 2007-06-22 Shell Internationale Research Maatschappij B.V. A method of installing an epoxidation catalyst in a reactor, a process for the preparation of an olefin oxide or a chemical derivable from an olefin oxide, and a reactor suitable for such a process
US8357812B2 (en) * 2005-12-22 2013-01-22 Shell Oil Company Process for preparing a rejuvenated epoxidation catalyst
US20070213545A1 (en) * 2005-12-22 2007-09-13 Bolk Jeroen W Method Of Installing An Epoxidation Catalyst In A Reactor, A Method Of Preparing An Epoxidation Catalyst, An Epoxidation Catalyst, A Process For The Preparation Of An Olefin Oxide Or A Chemical Derivable From An Olefin Oxide, And A Reactor Suitable For Such A Process
US7459589B2 (en) * 2005-12-22 2008-12-02 Shell Oil Company Process for the preparation of an alkylene glycol
US20070203348A1 (en) * 2005-12-22 2007-08-30 Bolk Jeroen W Method Of Installing An Epoxidation Catalyst In A Reactor, A Method Of Preparing An Epoxidation Catalyst, An Epoxidation Catalyst, A Process For The Preparation Of An Olefin Oxide Or A Chemical Derivable From An Olefin Oxide, And A Reactor Suitable For Such A Process
US20070197808A1 (en) * 2005-12-22 2007-08-23 Bolk Jeroen W Method Of Installing An Epoxidation Catalyst In A Reactor, A Method Of Preparing An Epoxidation Catalyst, An Epoxidation Catalyst, A Process For The Preparation Of An Olefin Oxide Or A Chemical Derivable From An Olefin Oxide, And A Reactor Suitable For Such A Process
US20070154377A1 (en) * 2005-12-22 2007-07-05 Rekers Dominicus M Process for the removal of combustible volatile contaminant materials from a process stream
US20070197801A1 (en) * 2005-12-22 2007-08-23 Bolk Jeroen W Method of installing an epoxidation catalyst in a reactor, a method of preparing an epoxidation catalyst, an epoxidation catalyst, a process for the preparation of an olefin oxide or a chemical derivable from an olefin oxide, and a reactor suitables for such a process
US20070203352A1 (en) * 2005-12-22 2007-08-30 Bolk Jeroen W Method Of Installing An Epoxidation Catalyst In A Reactor, A Method Of Preparing An Epoxidation Catalyst, An Epoxidation Catalyst, A Process For The Preparation Of An Olefin Oxide Or A Chemical Derivable From An Olefin Oxide, And A Reactor Suitable For Such A Process
US7704908B2 (en) * 2005-12-22 2010-04-27 Shell Oil Company Method for reusing rhenium from a donor spent epoxidation catalyst
US20070203349A1 (en) * 2005-12-22 2007-08-30 Bolk Jeroen W Method Of Installing An Epoxidation Catalyst In A Reactor, A Method Of Preparing An Epoxidation Catalyst, An Epoxidation Catalyst, A Process For The Preparation Of An Olefin Oxide Or A Chemical Derivable From An Olefin Oxide, And A Reactor Suitable For Such A Process
KR20080102155A (en) * 2006-02-03 2008-11-24 셀 인터나쵸나아레 레사아치 마아츠샤피 비이부이 A process for treating a catalyst, the catalyst, and use of the catalyst
US7553795B2 (en) 2006-03-21 2009-06-30 Sd Lizenzverwertungsgesellschaft Mbh & Co. Kg Activation of high selectivity ethylene oxide catalyst
US7977274B2 (en) * 2006-09-29 2011-07-12 Sd Lizenzverwertungsgesellschaft Mbh & Co. Kg Catalyst with bimodal pore size distribution and the use thereof
US20080154051A1 (en) * 2006-12-20 2008-06-26 Jeroen Willem Bolk Method of installing an epoxidation catalyst in a reactor, a method of preparing an epoxidation catalyst, an epoxidation catalyst, a process for the preparation of an olefin oxide or a chemical derivable from an olefin oxide, and a reactor suitable for such a process
US20080154052A1 (en) * 2006-12-20 2008-06-26 Jeroen Willem Bolk Method of installing an epoxidation catalyst in a reactor, a method of preparing an epoxidation catalyst, an epoxidation catalyst, a process for the preparation of an olefin oxide or a chemical derivable from an olefin oxide, and a reactor suitable for such a process
US20080254218A1 (en) * 2007-04-16 2008-10-16 Air Products And Chemicals, Inc. Metal Precursor Solutions For Chemical Vapor Deposition
KR20100017689A (en) 2007-05-09 2010-02-16 셀 인터나쵸나아레 레사아치 마아츠샤피 비이부이 An epoxidation catalyst, a process for preparing the catalyst, and a process for the production of an olefin oxide, a 1,2-diol, a 1,2-diol ether, a 1,2-carbonate, or an alkanolamine
AR066469A1 (en) * 2007-05-09 2009-08-19 Shell Int Research AN OLEFINE OXIDE, 1,2- DIOL, 1,2- DIOL ETER, 1,2- CARBONATE OR ALCANOLAMINE OXIDE PRODUCTION PROCESS
BRPI0811260B8 (en) * 2007-05-11 2017-03-21 Rokicki Andrzej high selectivity catalyst starting in olefin oxide plants
US7553980B2 (en) * 2007-09-26 2009-06-30 Sd Lizenzverwertungsgesellschaft Mbh & Co. Kg Process for initiating a highly selective ethylene oxide catalyst
EP2297124B1 (en) * 2008-05-07 2013-08-21 Shell Internationale Research Maatschappij B.V. A process for the start-up of an epoxidation process, a process for the production of ethylene oxide, a 1,2-diol, a 1,2-diol ether, a 1,2-carbonate, or an alkanolamine
EP2297125B1 (en) 2008-05-07 2013-07-03 Shell Internationale Research Maatschappij B.V. A process for the production of an olefin oxide, a 1,2-diol, a 1,2-diol ether, a 1,2-carbonate, or an alkanolamine
JP2012524785A (en) 2009-04-21 2012-10-18 ダウ テクノロジー インベストメンツ リミティド ライアビリティー カンパニー Simplified production method of alkylene oxide using highly efficient catalyst
SG175762A1 (en) 2009-04-21 2011-12-29 Dow Technology Investments Llc Methods for enhancing the efficiency of rhenium-promoted epoxidation catalysts and epoxidation methods utilizing these
JP5756087B2 (en) 2009-04-21 2015-07-29 ダウ テクノロジー インベストメンツ リミティド ライアビリティー カンパニー Improved method of achieving and maintaining specific alkylene oxide production parameters with high efficiency catalysts
KR101790254B1 (en) * 2009-12-17 2017-10-26 사이언티픽 디자인 컴파니 인코포레이티드 Process for epoxidation start-up
IN2012DN05077A (en) * 2009-12-23 2015-10-09 Scient Design Co
KR101786935B1 (en) * 2009-12-28 2017-10-18 다우 테크놀로지 인베스트먼츠 엘엘씨. Method of controlling the production of silver chloride on a silver catalyst in the production of alkylene oxides
TW201213013A (en) 2010-05-17 2012-04-01 Scient Design Co Method for preparing an epoxidation catalyst
TW201208763A (en) 2010-05-17 2012-03-01 Scient Design Co Method for making a highly selective ethylene oxide catalyst
BR112013007087B1 (en) 2010-09-29 2018-12-04 Shell Internationale Research Maartschappij B.V. process to produce an olefin oxide and method
US8742146B2 (en) * 2010-12-08 2014-06-03 Shell Oil Company Process for improving the selectivity of an EO catalyst
US8742147B2 (en) 2010-12-08 2014-06-03 Shell Oil Company Process for improving the selectivity of an EO catalyst
US8987483B2 (en) 2010-12-15 2015-03-24 Dow Technology Investments Llc Method of starting-up a process of producing an alkylene oxide using a high-efficiency catalyst
EP2696974B1 (en) * 2011-04-11 2018-11-14 Dow Technology Investments LLC Process for conditioning a high efficiency ethylene oxide catalyst
CA2834299C (en) * 2011-04-29 2019-09-03 Shell Internationale Research Maatschappij B.V. Process for improving the selectivity of an eo catalyst
WO2013059225A1 (en) * 2011-10-18 2013-04-25 Al-Ahmadi Hassan Eisa Epoxidation process with added moderator
SG11201403042SA (en) 2011-12-09 2014-10-30 Dow Technology Investments Llc Method of maintaining the value of an alkylene oxide production parameter in a process of making an alkylene oxide using a high efficiency catalyst
CN104884167B (en) * 2012-12-31 2017-07-07 科学设计公司 For the method for calcinating of the epoxyethane catalyst of production improvement
WO2014105770A1 (en) * 2012-12-31 2014-07-03 Scientific Design Company, Inc. Start-up process for high selectivity ethylene oxide catalysts
CN105008339B (en) * 2013-01-11 2017-09-12 科学设计公司 Epoxidation technique with rear regulating step
WO2015100209A1 (en) 2013-12-23 2015-07-02 Scientific Design Company, Inc. Epoxidation process
CN105618036B (en) * 2014-11-03 2018-10-16 中国石油化工股份有限公司 Preparation method, silver catalyst and the method for producing ethylene oxide of silver catalyst
CN105618046B (en) * 2014-11-03 2018-10-16 中国石油化工股份有限公司 Preparation method, silver catalyst and the method for producing ethylene oxide of silver catalyst
RU2017144428A (en) 2015-06-02 2019-07-09 Сайентифик Дизайн Компани, Инк. METHOD OF MAKING POROUS BODIES WITH IMPROVED PROPERTIES
KR102449657B1 (en) * 2016-12-02 2022-09-29 쉘 인터내셔날 리써취 마트샤피지 비.브이. Methods for conditioning ethylene epoxidation catalysts and related methods for the production of ethylene oxide
US10449520B2 (en) 2017-05-15 2019-10-22 Scientific Design Company, Inc. Porous bodies with enhanced crush strength
US11439986B2 (en) 2017-12-13 2022-09-13 Scientific Design Company, Inc. Silver impregnation solution containing high-boiling oxygenated additive and its use in ethylene oxide catalyst preparation
US11931725B2 (en) 2022-07-19 2024-03-19 Scientific Design Company, Inc. Ethylene oxide high selectivity catalyst conditioning process

Family Cites Families (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2219575A (en) 1939-06-16 1940-10-29 Carbide & Carbon Chem Corp Catalyst and process for making olefin oxides
GB1170663A (en) * 1967-03-22 1969-11-12 Shell Int Research Process for preparing Silver Catalysts
GB1191983A (en) 1968-04-11 1970-05-13 Sir Soc Italiana Resine Spa Preparation of Ethylene Oxide
GB1491447A (en) 1973-12-05 1977-11-09 Ici Ltd Alkylene oxide production and catalysts therefor
GB1489335A (en) 1973-10-26 1977-10-19 Shell Int Research Catalyst for the production of ethylene oxide
DE2967112D1 (en) 1978-02-10 1984-08-23 Ici Plc Production of olefine oxides
JPS57107240A (en) 1980-12-26 1982-07-03 Nippon Shokubai Kagaku Kogyo Co Ltd Production of silver catalyst for producing ethylene oxide
US4845296A (en) 1983-12-13 1989-07-04 Union Carbide Corporation Process for preparing alkanolamines
GB8423044D0 (en) 1984-09-12 1984-10-17 Ici Plc Production of ethylene oxide
IN169589B (en) * 1986-10-31 1991-11-16 Shell Int Research
US4761394A (en) 1986-10-31 1988-08-02 Shell Oil Company Ethylene oxide catalyst and process for preparing the catalyst
US4766105A (en) * 1986-10-31 1988-08-23 Shell Oil Company Ethylene oxide catalyst and process for preparing the catalyst
US4950773A (en) 1988-01-28 1990-08-21 Eastman Kodak Company Selective epoxidation of olefins
CA1339317C (en) 1988-07-25 1997-08-19 Ann Marie Lauritzen Process for producing ethylene oxide
US4874879A (en) 1988-07-25 1989-10-17 Shell Oil Company Process for starting-up an ethylene oxide reactor
US5102848A (en) 1990-09-28 1992-04-07 Union Carbide Chemicals & Plastics Technology Corporation Catalyst composition for oxidation of ethylene to ethylene oxide
DK0480538T3 (en) 1990-10-12 1998-11-02 Union Carbide Chem Plastic Alkylene oxide catalysts with increased activity and / or stability
US5100859A (en) 1991-01-22 1992-03-31 Norton Company Catalyst carrier
US5155242A (en) 1991-12-05 1992-10-13 Shell Oil Company Process for starting-up an ethylene oxide reactor
CA2089510C (en) 1992-02-27 1998-09-01 Shinichi Nagase Silver catalyst for production of ethylene oxide and method for production of the catalyst
CA2078480A1 (en) 1992-04-20 1993-10-21 Bennie Albert Horrell Jr. Improved process for ethylene epoxidation
US5407888A (en) 1992-05-12 1995-04-18 Basf Aktiengesellschaft Silver catalyst
US6184175B1 (en) 1993-03-01 2001-02-06 Scientic Design Company, Inc. Process for preparing silver catalyst
WO1995005896A1 (en) 1993-08-23 1995-03-02 Shell Internationale Research Maatschappij B.V. Ethylene oxide catalyst
US5380697A (en) 1993-09-08 1995-01-10 Shell Oil Company Ethylene oxide catalyst and process
US5418202A (en) 1993-12-30 1995-05-23 Shell Oil Company Ethylene oxide catalyst and process
WO1996004989A1 (en) 1994-08-09 1996-02-22 Scientific Design Company, Inc. Process for preparing silver catalyst
US5504052A (en) 1994-12-02 1996-04-02 Scientific Design Company, Inc. Silver catalyst preparation
ES2155111T3 (en) 1994-12-15 2001-05-01 Shell Int Research PROCEDURE TO PREPARE CATALYSTS FOR OBTAINING ETHYLENE OXIDE.
US5739075A (en) 1995-10-06 1998-04-14 Shell Oil Company Process for preparing ethylene oxide catalysts
US5801259A (en) 1996-04-30 1998-09-01 Shell Oil Company Ethylene oxide catalyst and process
US5736483A (en) 1996-10-25 1998-04-07 Scientific Design Co., Inc. Niobium or tantalum promoted silver catalyst
US5780656A (en) 1997-04-14 1998-07-14 Scientific Design Company, Inc. Ethylene oxide catalyst and process
US5770746A (en) * 1997-06-23 1998-06-23 Arco Chemical Technology, L.P. Epoxidation process using supported silver catalysts pretreated with organic chloride
US5854167A (en) 1997-09-02 1998-12-29 Scientific Design Company, Inc. Ethylene oxide catalyst
DE19803890A1 (en) 1998-01-31 1999-08-05 Erdoelchemie Gmbh Silver-containing supported catalysts and catalyst intermediates, process for their preparation and their use
CA2343783C (en) 1998-09-14 2008-02-12 Shell Internationale Research Maatschappij B.V. Process for removing ionizable species from catalyst surface to improve catalytic properties
WO2000015335A1 (en) 1998-09-14 2000-03-23 Shell Internationale Research Maatschappij B.V. Epoxidation catalyst carrier, preparation and use thereof
US6455713B1 (en) 1998-09-14 2002-09-24 Eastman Chemical Company Reactivation of Cs-promoted, Ag catalysts for the selective epoxidation of butadiene to 3,4-epoxy-1-butene
JP4518673B2 (en) 1998-09-14 2010-08-04 シエル・インターナシヨナル・リサーチ・マートスハツペイ・ベー・ヴエー Method for preparing a catalyst with improved catalytic properties
AU754631B2 (en) 1998-11-17 2002-11-21 Nippon Shokubai Co., Ltd. Carrier for catalyst for use in production of ethylene oxide, catalyst for use in production of ethylene oxide, and method for production of ethylene oxide
EP1289653A4 (en) 2000-05-01 2004-07-14 Scient Design Co Ethylene oxide catalyst
US6372925B1 (en) 2000-06-09 2002-04-16 Shell Oil Company Process for operating the epoxidation of ethylene
US6750173B2 (en) 2002-04-08 2004-06-15 Scientific Design Company, Inc. Ethylene oxide catalyst
BR0312010A (en) 2002-06-28 2005-03-22 Shell Int Research Method for starting an epoxidation process and a process for an olefin epoxidation
US7348444B2 (en) 2003-04-07 2008-03-25 Shell Oil Company Process for the production of an olefin oxide

Also Published As

Publication number Publication date
RU2005102097A (en) 2005-08-27
JP4578967B2 (en) 2010-11-10
MX245604B (en) 2007-05-04
TWI283242B (en) 2007-07-01
BR0312010A (en) 2005-03-22
EP1517901B1 (en) 2010-07-07
EP1517901A2 (en) 2005-03-30
BRPI0312010B1 (en) 2017-11-28
JP2006504642A (en) 2006-02-09
DE60333292D1 (en) 2010-08-19
KR20050087726A (en) 2005-08-31
MY135031A (en) 2008-01-31
US20040110971A1 (en) 2004-06-10
MXPA04012743A (en) 2005-08-15
KR101057864B1 (en) 2011-08-19
CN1665797A (en) 2005-09-07
TW200415144A (en) 2004-08-16
CA2494767C (en) 2012-07-17
WO2004002972A3 (en) 2004-06-10
AU2003247652A1 (en) 2004-01-19
WO2004002972A2 (en) 2004-01-08
US7102022B2 (en) 2006-09-05
CN1665797B (en) 2011-09-14
CA2494767A1 (en) 2004-01-08

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