ATE405534T1 - Verfahren zur herstellung von flüssigen und gegebenenfalls gasförmigen produkten aus gasförmigen reaktanten - Google Patents

Verfahren zur herstellung von flüssigen und gegebenenfalls gasförmigen produkten aus gasförmigen reaktanten

Info

Publication number
ATE405534T1
ATE405534T1 AT04732393T AT04732393T ATE405534T1 AT E405534 T1 ATE405534 T1 AT E405534T1 AT 04732393 T AT04732393 T AT 04732393T AT 04732393 T AT04732393 T AT 04732393T AT E405534 T1 ATE405534 T1 AT E405534T1
Authority
AT
Austria
Prior art keywords
vessel
slurry bed
bed zone
gaseous
gas
Prior art date
Application number
AT04732393T
Other languages
English (en)
Inventor
Andre Steynberg
Berthold Breman
Original Assignee
Sasol Tech Pty 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
Application filed by Sasol Tech Pty Ltd filed Critical Sasol Tech Pty Ltd
Application granted granted Critical
Publication of ATE405534T1 publication Critical patent/ATE405534T1/de

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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
    • 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
    • B01J8/1818—Feeding of the fluidising gas
    • 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
    • B01J8/1818—Feeding of the fluidising gas
    • B01J8/1827—Feeding of the fluidising gas the fluidising gas being a reactant
    • 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
    • B01J8/1836—Heating and cooling 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
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/20—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium
    • B01J8/22—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid
    • 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
    • B01J8/20—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium
    • B01J8/22—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid
    • B01J8/224—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid the particles being subject to a circulatory movement
    • B01J8/226—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid the particles being subject to a circulatory movement internally, i.e. the particles rotate within the vessel
    • 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
    • B01J8/28—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 the one above the other
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2/00—Production of liquid hydrocarbon mixtures of undefined composition from oxides of carbon
    • C10G2/30—Production of liquid hydrocarbon mixtures of undefined composition from oxides of carbon from carbon monoxide with hydrogen
    • C10G2/32—Production of liquid hydrocarbon mixtures of undefined composition from oxides of carbon from carbon monoxide with hydrogen with the use of catalysts
    • C10G2/34—Apparatus, reactors
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2/00—Production of liquid hydrocarbon mixtures of undefined composition from oxides of carbon
    • C10G2/30—Production of liquid hydrocarbon mixtures of undefined composition from oxides of carbon from carbon monoxide with hydrogen
    • C10G2/32—Production of liquid hydrocarbon mixtures of undefined composition from oxides of carbon from carbon monoxide with hydrogen with the use of catalysts
    • C10G2/34—Apparatus, reactors
    • C10G2/342—Apparatus, reactors with moving solid catalysts
    • C10G2/343—Apparatus, reactors with moving solid catalysts according to the "moving-bed" method
    • 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
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00106—Controlling the temperature by indirect heat exchange
    • B01J2208/00115—Controlling the temperature by indirect heat exchange with heat exchange elements inside the bed of solid particles
    • B01J2208/00141—Coils
    • 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
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00106—Controlling the temperature by indirect heat exchange
    • B01J2208/00265—Part of all of the reactants being heated or cooled outside the reactor while recycling
    • B01J2208/00274—Part of all of the reactants being heated or cooled outside the reactor while recycling involving reactant vapours
    • 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
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00539—Pressure
    • 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
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/0061—Controlling the level
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/40—Characteristics of the process deviating from typical ways of processing
    • C10G2300/4081—Recycling aspects
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/582—Recycling of unreacted starting or intermediate materials
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P30/00—Technologies relating to oil refining and petrochemical industry
    • Y02P30/20—Technologies relating to oil refining and petrochemical industry using bio-feedstock

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Treating Waste Gases (AREA)
AT04732393T 2003-05-16 2004-05-12 Verfahren zur herstellung von flüssigen und gegebenenfalls gasförmigen produkten aus gasförmigen reaktanten ATE405534T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US47132303P 2003-05-16 2003-05-16

Publications (1)

Publication Number Publication Date
ATE405534T1 true ATE405534T1 (de) 2008-09-15

Family

ID=33452435

Family Applications (1)

Application Number Title Priority Date Filing Date
AT04732393T ATE405534T1 (de) 2003-05-16 2004-05-12 Verfahren zur herstellung von flüssigen und gegebenenfalls gasförmigen produkten aus gasförmigen reaktanten

Country Status (13)

Country Link
US (2) US7439274B2 (de)
EP (1) EP1636151B1 (de)
JP (1) JP4966654B2 (de)
CN (1) CN100378043C (de)
AT (1) ATE405534T1 (de)
AU (1) AU2004238648B2 (de)
BR (1) BRPI0410365B1 (de)
CA (1) CA2525007C (de)
DE (1) DE602004015984D1 (de)
NO (1) NO20055938L (de)
RU (1) RU2342355C2 (de)
WO (1) WO2004101475A1 (de)
ZA (1) ZA200508993B (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2429714B (en) * 2004-05-10 2008-12-17 Sasol Technology The production of liquid and,optionally,gaseous hydrocarbons from gaseous reactants into an expanded slurry bed
ITMI20060493A1 (it) 2005-03-17 2006-09-18 Sasol Tech Pty Ltd Procedimento per il funzionamento di un reattore a letto fluido e reattore a letto fluido
AU2006224210C1 (en) 2005-03-17 2012-02-02 Sasol Technology (Proprietary) Limited Method of operating a three-phase slurry reactor
FR2900066B1 (fr) 2006-04-21 2008-05-30 Inst Francais Du Petrole Nouvel echangeur interne pour reacteur en lit fluidise gaz liquide solide, mettant en oeuvre une reaction fortement exothermique.
FR2900065B1 (fr) 2006-04-21 2008-05-30 Inst Francais Du Petrole Nouvel echangeur interne pour reacteur gaz liquide solide destine a la synthese fischer tropsch.
RU2466780C2 (ru) * 2007-08-24 2012-11-20 Сэсол Текнолоджи (Проприетери) Лимитед Способ синтеза углеводородов для получения жидких и газообразных продуктов из газообразных реагентов
WO2010038399A1 (ja) * 2008-09-30 2010-04-08 独立行政法人石油天然ガス・金属鉱物資源機構 炭化水素合成反応装置及び炭化水素合成反応システム、並びに炭化水素合成方法
AU2011342806B2 (en) * 2010-12-13 2016-05-26 Sasol Technology (Proprietary) Limited Slurry phase apparatus
AP2013007262A0 (en) * 2011-06-07 2013-11-30 Sasol Tech Pty Ltd Process for producing at least one product from atleast one gaseous reactant in a slurry bed
EP2740322B1 (de) 2011-08-04 2018-05-02 Stephen Lee Cunningham Plasma-lichtbogenbrenner und anwendungen
CN102703107B (zh) * 2012-06-26 2015-04-01 武汉凯迪工程技术研究总院有限公司 一种由生物质生产的合成气制造液态烃产品的方法
WO2015172132A1 (en) 2014-05-09 2015-11-12 Cunningham Stephen L Arc furnace smeltering system & method
WO2023118974A1 (en) * 2021-12-24 2023-06-29 Vinati Organics Limited An agitator reactor for synthesis of acrylamido tertiary butyl sulfonic acid and process implemented thereon

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463912A (en) 1946-12-12 1949-03-08 Standard Oil Dev Co Synthesis of hydrocarbons
US2560171A (en) * 1947-03-03 1951-07-10 Kellogg M W Co Synthesis of organic compounds
US2481089A (en) * 1947-03-06 1949-09-06 M K Kellogg Company Process and apparatus for the synthesis of organic compounds
US4035152A (en) * 1976-05-24 1977-07-12 The United States Of America As Represented By The United States Energy Research And Development Administration Distribution plate for recirculating fluidized bed
JPS6490030A (en) * 1987-10-01 1989-04-05 Mitsubishi Heavy Ind Ltd Three-phase fluidized reactor
US5252613A (en) * 1992-12-18 1993-10-12 Exxon Research & Engineering Company Enhanced catalyst mixing in slurry bubble columns (OP-3723)
IT1283774B1 (it) * 1996-08-07 1998-04-30 Agip Petroli Processo di fischer-tropsch con reattore a colonna a bolle multistadio
US5817702A (en) * 1997-05-02 1998-10-06 Exxon Research And Engineering Company Hydrocarbon synthesis catalyst slurry rejuvenation with gas disengagement
ZA985992B (en) * 1997-07-15 2000-01-10 Sasol Tech Pty Ltd A process for producing liquid and, optionally, gaseous products from gaseous reactants.
US6160026A (en) * 1997-09-24 2000-12-12 Texaco Inc. Process for optimizing hydrocarbon synthesis
US6203031B1 (en) 1998-12-07 2001-03-20 Steelworks, Inc. File cabinet dolly with open frame
FR2795001B1 (fr) * 1999-06-17 2001-08-17 Cogema Procede et installation de mise en oeuvre d'une reaction chimique triphasique sous pression
IT1312356B1 (it) * 1999-06-17 2002-04-15 Eni Spa Procedimento migliorato di fischer-tropsch
US6455644B1 (en) * 2000-02-28 2002-09-24 Union Carbide Chemicals & Plastics Technology Corporation Polyolefin production using condensing mode in fluidized beds, with liquid phase enrichment and bed injection
CN2562866Y (zh) * 2002-02-01 2003-07-30 中国石油天然气股份有限公司 多级环流反应器
US6800664B1 (en) * 2003-05-23 2004-10-05 Conocophillips Company Conjoined reactor system

Also Published As

Publication number Publication date
BRPI0410365B1 (pt) 2014-09-09
ZA200508993B (en) 2006-12-27
RU2342355C2 (ru) 2008-12-27
AU2004238648A1 (en) 2004-11-25
CN1787982A (zh) 2006-06-14
CA2525007C (en) 2012-02-14
US20080299022A1 (en) 2008-12-04
BRPI0410365A (pt) 2006-05-30
CN100378043C (zh) 2008-04-02
AU2004238648B2 (en) 2009-05-14
EP1636151A1 (de) 2006-03-22
US20070043125A1 (en) 2007-02-22
JP4966654B2 (ja) 2012-07-04
JP2007501121A (ja) 2007-01-25
EP1636151B1 (de) 2008-08-20
US7439274B2 (en) 2008-10-21
RU2005138918A (ru) 2006-05-10
DE602004015984D1 (de) 2008-10-02
CA2525007A1 (en) 2004-11-25
WO2004101475A1 (en) 2004-11-25
NO20055938L (no) 2005-12-14

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