FR2416876A1 - Steam dealkylation of alkyl-aromatic hydrocarbon(s) - using mobile-bed reactors with progressive regeneration - Google Patents

Steam dealkylation of alkyl-aromatic hydrocarbon(s) - using mobile-bed reactors with progressive regeneration

Info

Publication number
FR2416876A1
FR2416876A1 FR7804204A FR7804204A FR2416876A1 FR 2416876 A1 FR2416876 A1 FR 2416876A1 FR 7804204 A FR7804204 A FR 7804204A FR 7804204 A FR7804204 A FR 7804204A FR 2416876 A1 FR2416876 A1 FR 2416876A1
Authority
FR
France
Prior art keywords
reaction zone
mobile
alkyl
aromatic hydrocarbon
bed reactors
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
FR7804204A
Other languages
French (fr)
Other versions
FR2416876B3 (en
Inventor
Philippe Courty
Roland Huin
Jean-Francois Le Page
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.)
IFP Energies Nouvelles IFPEN
Original Assignee
IFP Energies Nouvelles IFPEN
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 IFP Energies Nouvelles IFPEN filed Critical IFP Energies Nouvelles IFPEN
Priority to FR7804204A priority Critical patent/FR2416876A1/en
Publication of FR2416876A1 publication Critical patent/FR2416876A1/en
Application granted granted Critical
Publication of FR2416876B3 publication Critical patent/FR2416876B3/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C4/00—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms
    • C07C4/08—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by splitting-off an aliphatic or cycloaliphatic part from the molecule
    • C07C4/12—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by splitting-off an aliphatic or cycloaliphatic part from the molecule from hydrocarbons containing a six-membered aromatic ring, e.g. propyltoluene to vinyltoluene
    • C07C4/14—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by splitting-off an aliphatic or cycloaliphatic part from the molecule from hydrocarbons containing a six-membered aromatic ring, e.g. propyltoluene to vinyltoluene splitting taking place at an aromatic-aliphatic bond
    • C07C4/20—Hydrogen being formed in situ, e.g. from steam
    • 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
    • Y02P20/584—Recycling of catalysts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Steam dealkylation is effected at 300-600 degrees C, a pressure of 1-20 atm., a LHSV of 0.1-10 and an H2O/feed molar ratio of 1-20. The feed is circulated through >=1 mobile-bed reaction zone in which the catalyst moves progressively from top-to-bottom. The improvement comprises progressively withdrawing catalyst from the bottom of the reaction zone, passing it to a regeneration zone, and progressively recycling the regenerated catalyst to the top of the reaction zone in such a way that a high and constant activity level is maintained at each point in the reaction zone. The process can be operated continuously for long periods without the loss of conversion and yield associated with fixed-bed operation.
FR7804204A 1978-02-13 1978-02-13 Steam dealkylation of alkyl-aromatic hydrocarbon(s) - using mobile-bed reactors with progressive regeneration Granted FR2416876A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7804204A FR2416876A1 (en) 1978-02-13 1978-02-13 Steam dealkylation of alkyl-aromatic hydrocarbon(s) - using mobile-bed reactors with progressive regeneration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7804204A FR2416876A1 (en) 1978-02-13 1978-02-13 Steam dealkylation of alkyl-aromatic hydrocarbon(s) - using mobile-bed reactors with progressive regeneration

Publications (2)

Publication Number Publication Date
FR2416876A1 true FR2416876A1 (en) 1979-09-07
FR2416876B3 FR2416876B3 (en) 1980-09-26

Family

ID=9204608

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7804204A Granted FR2416876A1 (en) 1978-02-13 1978-02-13 Steam dealkylation of alkyl-aromatic hydrocarbon(s) - using mobile-bed reactors with progressive regeneration

Country Status (1)

Country Link
FR (1) FR2416876A1 (en)

Also Published As

Publication number Publication date
FR2416876B3 (en) 1980-09-26

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Legal Events

Date Code Title Description
ST Notification of lapse