US3365387A - Off-stream decoking of a minor portion of on-stream thermal cracking tubes - Google Patents

Off-stream decoking of a minor portion of on-stream thermal cracking tubes Download PDF

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Publication number
US3365387A
US3365387A US546277A US54627766A US3365387A US 3365387 A US3365387 A US 3365387A US 546277 A US546277 A US 546277A US 54627766 A US54627766 A US 54627766A US 3365387 A US3365387 A US 3365387A
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United States
Prior art keywords
tubes
stream
steam
cracking
furnace
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Expired - Lifetime
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US546277A
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English (en)
Inventor
Robert P Cahn
John A Kivlen
David K Thurlow
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ExxonMobil Technology and Engineering Co
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Exxon Research and Engineering Co
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Publication date
Application filed by Exxon Research and Engineering Co filed Critical Exxon Research and Engineering Co
Priority to US546277A priority Critical patent/US3365387A/en
Priority to GB38710/66A priority patent/GB1117562A/en
Priority to NO164749A priority patent/NO138287C/no
Priority to IL26518A priority patent/IL26518A/en
Priority to BE687073D priority patent/BE687073A/xx
Priority to NL666613309A priority patent/NL146871B/xx
Priority to FR77382A priority patent/FR1501836A/fr
Priority to DE1568469A priority patent/DE1568469C3/de
Priority to AT918066A priority patent/AT276600B/de
Priority to DK515466AA priority patent/DK116434B/da
Priority to ES0331979A priority patent/ES331979A1/es
Priority to SE13692/66A priority patent/SE353077B/xx
Application granted granted Critical
Publication of US3365387A publication Critical patent/US3365387A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
    • C10G9/14—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils in pipes or coils with or without auxiliary means, e.g. digesters, soaking drums, expansion means
    • C10G9/16—Preventing or removing incrustation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/28—The renewable source being wind energy

Definitions

  • the present invention pertains to a method of decoking the tubes of a cracking furnace and particularly to the decoking of the coils or tubes of a steam cracking furnace.
  • Steam cracking of the hydrocarbon feed stock is effected by supplying the feed stock in vaporized or substantially vaporized form in admixture with substantial amounts of steam to suitable coils in a cracking furnace. It is conventional to pass the reaction mixture through a number of parallel coils or tubes which pass through a convection section of the cracking furnace wherein hot combustion gases raise the temperature of the reaction mixture. Each coil or tube then passes through the tired or radiant section of the cracking furnace wherein a multiplicity of Aburners supply the heat necessary to bring the reactants to the desired reaction temperature and effect the desired reaction or conversion.
  • lt is a further object of this invention to provide an improved process for thermal cracking of hydrocarbon feed stocks in the presence of steam wherein coke deposits are removed without shutting down the cracking furnace and with only a minor reduction in production throughput of the system.
  • Sufcient steam and/or water are introduced to remove the Aheat normally going to the process fluid without exceeding the tube metal temperature allowances as determined by stress or oxidation limits for the tube material.
  • the temperature of the steam entering the section of the furnace to -be decoked must be about 700 F. or higher. lf water in introduced it must be vaporized and superheated to this temperature while steam must be merely superheated.
  • the mass rate of steam entering the section of the furnace to be decoked should preferably be greater than pounds per second per square foot of tube internal cross-sectional area when the tube outlet pressure is of the order of -25 p.s.i.a. Higher mass rates at constant Itemperature reduce the time required for decoking. Higher operating pressures in the furnace tubes being decoked require higher mass rates of steam for the same decoking time.
  • a furnace pass may be decoked in l2 hours or less.
  • the same procedure may be used at any time deemed desirable to decoke additional passes, one at a time.
  • two or more passes in a multipass furnace can be decoked in this manner simultaneously, but this does tend to detract from the major advantage of this scheme, namely, minimum upset to normal operation.
  • the cracking furnace 10 comprises an upper, convection or preheat section 11 and a lower, cracking zone 12.
  • Burners 13 are provided on the side walls and/or on the bottom of the furnace to supply heat. The number of burners provided is dependent upon the heat require-d and may vary considerably.
  • the furnace contains several conduits or passes in parallel. Each pass may contain a number of connected tubular members or tubes that provide a flow path through the convection section and into the cracking section. ln the drawing, one pass is shown, with the tubes in the convection section 11 designated by the numeral 15 and the cracking coils or tubes in the cracking zone 12 designated by the numeral 16. It is to ⁇ be understood that the number of conduits or tubes in the furnace is a function of the size of the furnace and is dictated solely by design considerations.
  • Hydrocarbon feed stock is supplied to the steam cracker via supply conduit 20 and manifold or distributor conduit 21 to the several parallel cracking conduits or passes.
  • a control valve 22 is provided on each conduit 23 connecting the feed distributor 21 to each of the cracking conduits or tubes.
  • Steam, or in the decoking operation, steam and/or water are supplied Kthrough inlet line 24 and valve 25 to the conduit 23. (In some cases, steam and water are supplied through separate lines and not necessarily at the identical point in the convection section.)
  • reaction products are discharged from the coils or tubes 16 of the cracking furnace via conduits 26 into conduit or header 27 from which they are discharged into conduit 2S.
  • quenching agents such as higher boiling hydrocarbons and/or water are supplied through conduit 29 and control valve 30.
  • the mixture of quenched reaction products and quenching agent is discharged via conduit 23 into fractionating tower 31.
  • Aromatic tar product is withdrawn from the bottom of fractionating tower 31 through line 32 and product is taken overhead via line 33.
  • Other intermediate boiling range fractions may be withdrawn as product or recycled to a higher plate in the fractionating tower as one or more reflux streams.
  • the quench oil may be withdrawn from the fractionating tower 31 through line 34 and passed through heat exchanger 35 where it is passed in indirect heat exchange relation to the hydrocarbon feed stock for preheat thereof or to water for steam formation while cooling the quench oil to a suitable temperature for discharge through line 29 and valve 30 into the reaction product stream in line 28 as described above.
  • the on-stream decoking procedure requires the closing of one of the hydrocarbon feed valves 22 and the opening of the steam water valve 25.
  • the amount of steam and Water passed through the decoking conduit 24 is adjusted so that the steam temperature inside the pass is about 700 F. or higher at the point of transition from convection tubes 15 to cracking tubes 16.
  • valve 25 is closed and valve 22 is opened.
  • a steam cracking furnace containing ten passes or conduits was decoked by slowly backing out the hydrocarbon feed to one pass at a time while adding boiler feed water and adjusting normal steam flow.
  • Three tests were carried out by varying the quantities of steam, water and time of decoking, and a fourth test was made with constant Water and steam rates in one ⁇ pass until a furnace shutdown some twenty hours later.
  • the furnace was shut down and the tubes were then removed from the furnace for examination. The following are summaries of the tests which were carried out and the condition of the tubes on examination after the furnace was shut down.
  • Feed to pass 8 backed out over a 2-hour period.
  • feed was returned to the pass D 6 801 nu 7 8 9 2 5 0 ew mu Is o 00000 0 0 o o 0 0 400 0 W 55777 7 7 7 9 9 504 8 um 1 66990 9 9 9 9 2 2 722 n u om.
  • Feed to pass 6 was backed out using After a further 30 minutes the steam a steam/Water mixture over a period of minutes. flow was reduced for a 10 second period to induce thermal shock in the tube. rlhis was repeated 5 minutes later. Feed was again returned to Nora-Large tube areas of Pass No. 6 were found to be completely free of coke when examined alter the furnace shutdown. Remaining areas had coke deposits of average thickness .OSS' (micrometer readings).

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Processing Of Solid Wastes (AREA)
US546277A 1966-04-29 1966-04-29 Off-stream decoking of a minor portion of on-stream thermal cracking tubes Expired - Lifetime US3365387A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
US546277A US3365387A (en) 1966-04-29 1966-04-29 Off-stream decoking of a minor portion of on-stream thermal cracking tubes
GB38710/66A GB1117562A (en) 1966-04-29 1966-08-30 Thermal cracking process
NO164749A NO138287C (no) 1966-04-29 1966-09-15 Fremgangsmaate til termisk dampkrakking av hydrokarbonmaterialer
IL26518A IL26518A (en) 1966-04-29 1966-09-18 Thermal cracking process with improved decoking
BE687073D BE687073A (en)van) 1966-04-29 1966-09-19
NL666613309A NL146871B (nl) 1966-04-29 1966-09-21 Werkwijze voor het continu thermisch kraken van koolwaterstoffen.
FR77382A FR1501836A (fr) 1966-04-29 1966-09-23 Procédé de craquage thermique avec décokage des tubes de fours de craquage
DE1568469A DE1568469C3 (de) 1966-04-29 1966-09-28 Verfahren zum thermischen Wasserdampf-Cracken von Kohlenwasserstoffen
AT918066A AT276600B (de) 1966-04-29 1966-09-30 Verfahren zur Entfernung von beim thermischen Kracken von Kohlenwasserstoffen abgelagertem Koks
DK515466AA DK116434B (da) 1966-04-29 1966-10-05 Fremgangsmåde til termisk krakning af carbonhydridprodukter.
ES0331979A ES331979A1 (es) 1966-04-29 1966-10-06 Un procedimiento para craquizar termicamente materiales hidrocarbonados.
SE13692/66A SE353077B (en)van) 1966-04-29 1966-10-10

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US546277A US3365387A (en) 1966-04-29 1966-04-29 Off-stream decoking of a minor portion of on-stream thermal cracking tubes

Publications (1)

Publication Number Publication Date
US3365387A true US3365387A (en) 1968-01-23

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US (1) US3365387A (en)van)
AT (1) AT276600B (en)van)
BE (1) BE687073A (en)van)
DE (1) DE1568469C3 (en)van)
DK (1) DK116434B (en)van)
ES (1) ES331979A1 (en)van)
FR (1) FR1501836A (en)van)
GB (1) GB1117562A (en)van)
IL (1) IL26518A (en)van)
NL (1) NL146871B (en)van)
NO (1) NO138287C (en)van)
SE (1) SE353077B (en)van)

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433731A (en) * 1967-03-01 1969-03-18 Monsanto Co Coil decoking in steam cracking by intermittent switch to ethane feed
DE2028913A1 (de) * 1969-07-28 1971-02-11 Esso Research and Engineering Co Linden, NJ (V StA) Verfahren zur thermischen Crackung von Kohlenwasserstoffen
DE2026319A1 (en) * 1970-05-29 1972-01-13 Esso Research And Engineering Co., Linden, N.J. (V.Sta.) Cracking petroleum-steam mixture - with addn of phosphorus or bismuth cpd to suppress coking and carbon monoxide formation
US4046869A (en) * 1976-02-11 1977-09-06 Texaco Inc. Steam reforming process
EP0021167A1 (de) * 1979-06-08 1981-01-07 Linde Aktiengesellschaft Verfahren und Vorrichtung zur thermischen Entkokung einer aus Spaltzone und nachfolgendem Spaltgaskühler bestehenden Vorrichtung zum thermischen Spalten von Kohlenwasserstoffen
EP0143486A3 (en) * 1983-10-31 1986-04-16 Union Carbide Corporation Method for on-line decoking of flame cracking reactors
US4828681A (en) * 1984-12-24 1989-05-09 Exxon Research & Engineering Company Process of thermally cracking hydrocarbons using particulate solids as heat carrier
US4917787A (en) * 1983-10-31 1990-04-17 Union Carbide Chemicals And Plastics Company Inc. Method for on-line decoking of flame cracking reactors
US5078857A (en) * 1988-09-13 1992-01-07 Melton M Shannon Delayed coking and heater therefor
US5186815A (en) * 1989-04-14 1993-02-16 Procedes Petroliers Et Petrochimiques Method of decoking an installation for steam cracking hydrocarbons, and a corresponding steam-cracking installation
US5190634A (en) * 1988-12-02 1993-03-02 Lummus Crest Inc. Inhibition of coke formation during vaporization of heavy hydrocarbons
US5906728A (en) * 1996-08-23 1999-05-25 Exxon Chemical Patents Inc. Process for increased olefin yields from heavy feedstocks
US6179993B1 (en) 1996-02-23 2001-01-30 Exxon Chemical Patents Inc. Process for obtaining olefins from residual feedstocks
US6406613B1 (en) 1999-11-12 2002-06-18 Exxonmobil Research And Engineering Co. Mitigation of coke deposits in refinery reactor units
US6585883B1 (en) 1999-11-12 2003-07-01 Exxonmobil Research And Engineering Company Mitigation and gasification of coke deposits
US6852294B2 (en) 2001-06-01 2005-02-08 Conocophillips Company Alternate coke furnace tube arrangement
US20050038304A1 (en) * 2003-08-15 2005-02-17 Van Egmond Cor F. Integrating a methanol to olefin reaction system with a steam cracking system
US20060188417A1 (en) * 2005-02-23 2006-08-24 Roth James R Radiant tubes arrangement in low NOx furnace
US20090152172A1 (en) * 2006-05-10 2009-06-18 United Technologies Corporation In-situ continuous coke deposit removal by catalytic steam gasification
US20100006478A1 (en) * 2008-07-11 2010-01-14 Spicer David B Process for the On-Stream Decoking of a Furnace for Cracking a Hydrocarbon Feed
US20100174130A1 (en) * 2009-01-05 2010-07-08 Spicer David B Process for Cracking a Heavy Hydrocarbon Feedstream
US20100191031A1 (en) * 2009-01-26 2010-07-29 Kandasamy Meenakshi Sundaram Adiabatic reactor to produce olefins
US20100252072A1 (en) * 2009-04-06 2010-10-07 Synfuels International, Inc. Secondary reaction quench device and method of use
WO2013093640A2 (en) 2011-12-21 2013-06-27 Hyl Technologies, S.A. De C.V. Method and apparatus for production of direct reduced iron (dri) utilizing coke oven gas
US20130239999A1 (en) * 2011-09-13 2013-09-19 Vasant Lotu Bhirud Ethylene Furnace Decoking Method
WO2014005998A1 (en) 2012-07-05 2014-01-09 Shell Internationale Research Maatschappij B.V. Integrated process for the preparation of olefins
EP3040325A1 (en) 2014-12-31 2016-07-06 Shell Internationale Research Maatschappij B.V. Process for preparing ethylene, propylene and isoprene
WO2020159719A1 (en) 2019-01-30 2020-08-06 Exxonmobil Chemical Patents Inc. Process and system for processing asphaltenes-rich feed
US20210222073A1 (en) * 2018-06-12 2021-07-22 Sabic Global Technologies B.V. Naphtha splitter integration with hncc technology
US11072749B2 (en) 2019-03-25 2021-07-27 Exxonmobil Chemical Patents Inc. Process and system for processing petroleum feed
WO2021230917A2 (en) 2019-12-30 2021-11-18 Exxonmobil Chemical Patents Inc. Hydrocarbon pyrolysis with less exhaust emission
WO2022155035A1 (en) 2021-01-18 2022-07-21 Exxonmobil Chemical Patents Inc. Methods and systems for cracking hydrocarbons
WO2023114623A1 (en) 2021-12-16 2023-06-22 Exxonmobil Chemical Patents Inc. Duty recovery system and process for steam cracking furnace
WO2023114633A1 (en) 2021-12-16 2023-06-22 Exxonmobil Chemical Patents Inc. Steam cracking furnace and process
US11807820B2 (en) 2019-03-20 2023-11-07 Exxonmobil Chemical Patents Inc. Processes for on-stream decoking
US11932816B2 (en) 2019-02-15 2024-03-19 Exxonmobil Chemical Patents Inc. Coke and tar removal from a furnace effluent
US12352204B2 (en) 2019-12-30 2025-07-08 ExxonMobil Engineering & Technology Company Pyrolysis product compression using CO2 loop

Families Citing this family (4)

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FR2641543B1 (fr) * 1989-01-12 1991-05-03 Inst Francais Du Petrole Procede et dispositif de vapocraquage d'un hydrocarbure a deux atomes de carbone au moins dans une zone reactionnelle tubulaire chauffee par convection
FR2748273B1 (fr) * 1996-05-06 1998-06-26 Inst Francais Du Petrole Procede et dispositif de conversion thermique d'hydrocarbures en hydrocarbures aliphatiques plus insatures que les produits de depart, combinant une etape de vapocraquage et une etape de pyrolyse
CA2292915C (en) 1997-06-05 2001-08-21 Atf Resources, Inc. Method and apparatus for removing and suppressing coke formation during pyrolysis
FR2837273B1 (fr) * 2002-03-15 2004-10-22 Inst Francais Du Petrole Procede d'elimination au moins partielle de depots carbones dans un echangeur de chaleur

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US2289351A (en) * 1939-04-06 1942-07-14 Texas Co Method of cleaning heater tubes
US2372186A (en) * 1941-07-05 1945-03-27 United Gas Improvement Co Pyrolyzing method and apparatus
US3268435A (en) * 1963-09-30 1966-08-23 Sellin Jan Process and apparatus for admission to tubes in tube heaters

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FR984365A (fr) * 1948-04-12 1951-07-05 Petrocarbon Ltd Perfectionnements apportés aux procédés et dispositifs pour le traitement thermique des hydrocarbures
CH294686A (de) * 1949-07-26 1953-11-30 Limited Petrocarbon Verfahren zur Umwandlung flüssiger Kohlenwasserstoffe in olefinhaltige Gase und aromatische Kohlenwasserstoffe.
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Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2076847A (en) * 1934-07-10 1937-04-13 Universal Oil Prod Co Cleaning furnace tube
US2289351A (en) * 1939-04-06 1942-07-14 Texas Co Method of cleaning heater tubes
US2372186A (en) * 1941-07-05 1945-03-27 United Gas Improvement Co Pyrolyzing method and apparatus
US3268435A (en) * 1963-09-30 1966-08-23 Sellin Jan Process and apparatus for admission to tubes in tube heaters

Cited By (56)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433731A (en) * 1967-03-01 1969-03-18 Monsanto Co Coil decoking in steam cracking by intermittent switch to ethane feed
DE2028913A1 (de) * 1969-07-28 1971-02-11 Esso Research and Engineering Co Linden, NJ (V StA) Verfahren zur thermischen Crackung von Kohlenwasserstoffen
DE2026319A1 (en) * 1970-05-29 1972-01-13 Esso Research And Engineering Co., Linden, N.J. (V.Sta.) Cracking petroleum-steam mixture - with addn of phosphorus or bismuth cpd to suppress coking and carbon monoxide formation
US4046869A (en) * 1976-02-11 1977-09-06 Texaco Inc. Steam reforming process
EP0021167A1 (de) * 1979-06-08 1981-01-07 Linde Aktiengesellschaft Verfahren und Vorrichtung zur thermischen Entkokung einer aus Spaltzone und nachfolgendem Spaltgaskühler bestehenden Vorrichtung zum thermischen Spalten von Kohlenwasserstoffen
US4376694A (en) * 1979-06-08 1983-03-15 Linde Aktiengesellschaft Method of decoking a cracking plant
EP0143486A3 (en) * 1983-10-31 1986-04-16 Union Carbide Corporation Method for on-line decoking of flame cracking reactors
US4917787A (en) * 1983-10-31 1990-04-17 Union Carbide Chemicals And Plastics Company Inc. Method for on-line decoking of flame cracking reactors
US4828681A (en) * 1984-12-24 1989-05-09 Exxon Research & Engineering Company Process of thermally cracking hydrocarbons using particulate solids as heat carrier
US5078857A (en) * 1988-09-13 1992-01-07 Melton M Shannon Delayed coking and heater therefor
US5190634A (en) * 1988-12-02 1993-03-02 Lummus Crest Inc. Inhibition of coke formation during vaporization of heavy hydrocarbons
US5186815A (en) * 1989-04-14 1993-02-16 Procedes Petroliers Et Petrochimiques Method of decoking an installation for steam cracking hydrocarbons, and a corresponding steam-cracking installation
US6179993B1 (en) 1996-02-23 2001-01-30 Exxon Chemical Patents Inc. Process for obtaining olefins from residual feedstocks
US5906728A (en) * 1996-08-23 1999-05-25 Exxon Chemical Patents Inc. Process for increased olefin yields from heavy feedstocks
US6406613B1 (en) 1999-11-12 2002-06-18 Exxonmobil Research And Engineering Co. Mitigation of coke deposits in refinery reactor units
US6585883B1 (en) 1999-11-12 2003-07-01 Exxonmobil Research And Engineering Company Mitigation and gasification of coke deposits
US6852294B2 (en) 2001-06-01 2005-02-08 Conocophillips Company Alternate coke furnace tube arrangement
US20050098477A1 (en) * 2001-06-01 2005-05-12 Doerksen Brian J. Alternate coke furnace tube arrangement
US7524411B2 (en) 2001-06-01 2009-04-28 Conocophillips Company Alternate coke furnace tube arrangement
US20050038304A1 (en) * 2003-08-15 2005-02-17 Van Egmond Cor F. Integrating a methanol to olefin reaction system with a steam cracking system
US20060188417A1 (en) * 2005-02-23 2006-08-24 Roth James R Radiant tubes arrangement in low NOx furnace
US20090152172A1 (en) * 2006-05-10 2009-06-18 United Technologies Corporation In-situ continuous coke deposit removal by catalytic steam gasification
US7883674B2 (en) * 2006-05-10 2011-02-08 United Technologies Corporation In-situ continuous coke deposit removal by catalytic steam gasification
CN102083944A (zh) * 2008-07-11 2011-06-01 埃克森美孚化学专利公司 裂解烃原料的炉的在运转中脱焦的方法
CN102083944B (zh) * 2008-07-11 2016-05-04 埃克森美孚化学专利公司 裂解烃原料的炉的在运转中脱焦的方法
WO2010005633A1 (en) * 2008-07-11 2010-01-14 Exxonmobil Chemical Patents Inc. Process for the on-stream decoking of a furnace for cracking a hydrocarbon feed
US20100006478A1 (en) * 2008-07-11 2010-01-14 Spicer David B Process for the On-Stream Decoking of a Furnace for Cracking a Hydrocarbon Feed
US8864977B2 (en) 2008-07-11 2014-10-21 Exxonmobil Chemical Patents Inc. Process for the on-stream decoking of a furnace for cracking a hydrocarbon feed
WO2010077461A1 (en) 2009-01-05 2010-07-08 Exxonmobil Chemical Patents Inc. Process for cracking a heavy hydrocarbon feedstream
US8684384B2 (en) 2009-01-05 2014-04-01 Exxonmobil Chemical Patents Inc. Process for cracking a heavy hydrocarbon feedstream
US20100174130A1 (en) * 2009-01-05 2010-07-08 Spicer David B Process for Cracking a Heavy Hydrocarbon Feedstream
US20100191031A1 (en) * 2009-01-26 2010-07-29 Kandasamy Meenakshi Sundaram Adiabatic reactor to produce olefins
US8815080B2 (en) * 2009-01-26 2014-08-26 Lummus Technology Inc. Adiabatic reactor to produce olefins
US8137476B2 (en) 2009-04-06 2012-03-20 Synfuels International, Inc. Secondary reaction quench device and method of use
US8434505B2 (en) 2009-04-06 2013-05-07 Synfuels International, Inc. Secondary reaction quench device and method of use
US20100252072A1 (en) * 2009-04-06 2010-10-07 Synfuels International, Inc. Secondary reaction quench device and method of use
US20130239999A1 (en) * 2011-09-13 2013-09-19 Vasant Lotu Bhirud Ethylene Furnace Decoking Method
US9127211B2 (en) * 2011-09-13 2015-09-08 Sbt Technology, Inc. Ethylene furnace decoking method
WO2013093640A2 (en) 2011-12-21 2013-06-27 Hyl Technologies, S.A. De C.V. Method and apparatus for production of direct reduced iron (dri) utilizing coke oven gas
CN104245963A (zh) * 2011-12-21 2014-12-24 伊尔技术有限公司 利用焦炉气制备直接还原铁(dri)的方法和设备
WO2013093640A3 (en) * 2011-12-21 2013-12-27 Hyl Technologies, S.A. De C.V. Method and apparatus for production of direct reduced iron (dri) utilizing coke oven gas
CN104245963B (zh) * 2011-12-21 2016-11-16 伊尔技术有限公司 利用焦炉气制备直接还原铁(dri)的方法和设备
US9725778B2 (en) 2011-12-21 2017-08-08 Hyl Technologies, S.A. De C.V. Method and apparatus for production of direct reduced iron (DRI) utilizing coke oven gas
WO2014005998A1 (en) 2012-07-05 2014-01-09 Shell Internationale Research Maatschappij B.V. Integrated process for the preparation of olefins
US9732011B2 (en) 2012-07-05 2017-08-15 Shell Oil Company Integrated process for the preparation of olefins
EP3040325A1 (en) 2014-12-31 2016-07-06 Shell Internationale Research Maatschappij B.V. Process for preparing ethylene, propylene and isoprene
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DE1568469C3 (de) 1982-09-16
GB1117562A (en) 1968-06-19
NL146871B (nl) 1975-08-15
SE353077B (en)van) 1973-01-22
DK116434B (da) 1970-01-12
BE687073A (en)van) 1967-03-20
NO138287C (no) 1978-08-09
NO138287B (no) 1978-05-02
DE1568469A1 (de) 1972-02-24
IL26518A (en) 1970-03-22
DE1568469B2 (de) 1977-03-10
ES331979A1 (es) 1967-07-16
AT276600B (de) 1969-11-25
NL6613309A (en)van) 1967-10-30
FR1501836A (fr) 1967-11-18

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