CA2389860A1 - Mitigation of coke deposits in refinery reactor units - Google Patents

Mitigation of coke deposits in refinery reactor units Download PDF

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Publication number
CA2389860A1
CA2389860A1 CA002389860A CA2389860A CA2389860A1 CA 2389860 A1 CA2389860 A1 CA 2389860A1 CA 002389860 A CA002389860 A CA 002389860A CA 2389860 A CA2389860 A CA 2389860A CA 2389860 A1 CA2389860 A1 CA 2389860A1
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CA
Canada
Prior art keywords
temperature
zone
condensable
medium
phase transition
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.)
Granted
Application number
CA002389860A
Other languages
French (fr)
Other versions
CA2389860C (en
Inventor
Nicholas Charles Nahas
Dean Clise Draemel
Richard Edwards Walter
Michael Siskin
Glen E. Phillips
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.)
ExxonMobil Technology and Engineering Co
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Individual
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
Priority claimed from US09/685,359 external-priority patent/US6406613B1/en
Application filed by Individual filed Critical Individual
Publication of CA2389860A1 publication Critical patent/CA2389860A1/en
Application granted granted Critical
Publication of CA2389860C publication Critical patent/CA2389860C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
    • C10G11/14—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils with preheated moving solid catalysts
    • C10G11/18—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils with preheated moving solid catalysts according to the "fluidised-bed" technique
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B43/00—Preventing or removing incrustations
    • C10B43/14—Preventing incrustations
    • 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
    • C10G9/28—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils with preheated moving solid material
    • C10G9/32—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils with preheated moving solid material according to the "fluidised-bed" technique

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

A method for mitigating the condensation of liquid hydrocarbons and subseque nt coke deposition in refinery reactor units by dew point suppression.

Claims (12)

1. A method for mitigating the condensation of liquid hydrocarbons and subsequent coke deposition in refinery reactor units wherein during operation of said units a dense phase zone comprising hydrocarbon feed and a dilute phase zone comprising vaporized hydrocarbon products produced from said hydrocarbon feed and a phase transition zone between said dense and dilute phase zones are present, said method comprising injecting a non-condensable medium wherein said medium is selected from the group consisting of non-condensable vapors, gases, and mixtures thereof, into said dilute phase zone, to form an admixture with said vaporized hydrocarbon products wherein the dew point of the dilute phase zone is suppressed while maintaining the temperature above the suppressed dew point and wherein said dew point of said dilute phase zone will be suppressed by at least about 5°F (3°C) below the temperature of said dilute phase zone.
2. The method of claim 1 wherein said non-condensable medium is non-condensable at temperatures greater than or equal to the temperature of the dilute phase zone.
3. The method of claim 1 wherein said non-condensable medium is selected from the group consisting of steam, hydrocarbons, inert gases and mixtures thereof.
4. The method of claim 1 wherein said refinery unit is a fluid coking unit.
5. The method of claim 1 wherein said refinery unit is a fluid catalytic cracking unit.
6. The method of claim 1 wherein said non-condensable medium is injected at a temperature at least about 1 to about 100°F (about 0.6 to about 55°C) higher than the phase transition zone.
7. The method of claim 1 wherein at least about 5 mole % of non-condensable medium is injected.
8. The method of claim 4 wherein the temperature of said non-condensable medium is selected to maintain the temperature of the reactor cyclone outlet at least about 5°F (at least about 3°C) higher than the phase transition temperature.
9. The method of claim 4 wherein the fluid coking unit includes cyclone inlets and the non-condensable medium is introduced into the dilute phase zone below the fluid coking unit cyclone inlets.
10. The method of claim 5 wherein the temperature of said non-condensable medium is selected to maintain the temperature of the reactor cyclone outlet at least about 10°F (6°C) higher than the phase transition temperature.
11. The method of claim 5 wherein the fluid catalytic cracking unit includes cyclone outlets discharging into a plenum and the non-condensable medium is introduced into the plenum below the fluid coking unit cyclone outlets.
12. The method of claim 1 wherein said phase transition zone contains product vapors and wherein said non-condensible medium, scouring coke or a mixture thereof is injected at a temperature sufficient to maintain or raise the temperature of said product vapors in said phase transition zone at least about (1 to 20°F (0.6 to 11°C) above the phase transition zone temperature.
CA002389860A 1999-11-12 2000-10-20 Mitigation of coke deposits in refinery reactor units Expired - Fee Related CA2389860C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US43843999A 1999-11-12 1999-11-12
US09/438,439 1999-11-12
US09/685,359 2000-10-10
US09/685,359 US6406613B1 (en) 1999-11-12 2000-10-10 Mitigation of coke deposits in refinery reactor units
PCT/US2000/028985 WO2001036563A1 (en) 1999-11-12 2000-10-20 Mitigation of coke deposits in refinery reactor units

Publications (2)

Publication Number Publication Date
CA2389860A1 true CA2389860A1 (en) 2001-05-25
CA2389860C CA2389860C (en) 2010-01-12

Family

ID=27031654

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002389860A Expired - Fee Related CA2389860C (en) 1999-11-12 2000-10-20 Mitigation of coke deposits in refinery reactor units

Country Status (8)

Country Link
EP (1) EP1232228B1 (en)
JP (1) JP2004502791A (en)
AR (1) AR026412A1 (en)
AU (1) AU1218001A (en)
CA (1) CA2389860C (en)
DE (1) DE60004389T2 (en)
NO (1) NO20022240L (en)
WO (1) WO2001036563A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7686940B2 (en) * 2005-03-02 2010-03-30 Exxonmobil Research And Engineering Company Acoustic agglomeration to reduce fouling in thermal conversion processes

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3188184A (en) * 1960-04-15 1965-06-08 Pullman Inc Fluid catalytic cracking unit
US4043899A (en) * 1976-02-27 1977-08-23 Mobil Oil Corporation Method and means for separating gasiform materials from finely divided catalyst particles
US4816136A (en) * 1986-05-27 1989-03-28 Exxon Research And Engineering Company Low severity fluid coking
BR9303773A (en) * 1993-09-13 1995-10-10 Petroleo Brasileiro Sa System to separate suspensions from catalyst particles and hydrocarbon reacted mixture and catalytic cracking process

Also Published As

Publication number Publication date
WO2001036563A1 (en) 2001-05-25
AR026412A1 (en) 2003-02-12
CA2389860C (en) 2010-01-12
NO20022240L (en) 2002-05-28
NO20022240D0 (en) 2002-05-10
EP1232228A1 (en) 2002-08-21
JP2004502791A (en) 2004-01-29
AU1218001A (en) 2001-05-30
DE60004389T2 (en) 2004-06-24
EP1232228B1 (en) 2003-08-06
DE60004389D1 (en) 2003-09-11

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Effective date: 20151020