FR2351930A1 - Hydrodealkylation of alkyl aromatic hydrocarbon(s) - using rhodium-contg. catalyst with palladium and/or platinum - Google Patents

Hydrodealkylation of alkyl aromatic hydrocarbon(s) - using rhodium-contg. catalyst with palladium and/or platinum

Info

Publication number
FR2351930A1
FR2351930A1 FR7615236A FR7615236A FR2351930A1 FR 2351930 A1 FR2351930 A1 FR 2351930A1 FR 7615236 A FR7615236 A FR 7615236A FR 7615236 A FR7615236 A FR 7615236A FR 2351930 A1 FR2351930 A1 FR 2351930A1
Authority
FR
France
Prior art keywords
catalyst
rhodium
vol
reaction
hydrodealkylation
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
FR7615236A
Other languages
French (fr)
Other versions
FR2351930B1 (en
Inventor
Brunelle Jean-Pierre
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.)
Rhone Poulenc Industries SA
Original Assignee
Rhone Poulenc Industries SA
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 Rhone Poulenc Industries SA filed Critical Rhone Poulenc Industries SA
Priority to FR7615236A priority Critical patent/FR2351930A1/en
Publication of FR2351930A1 publication Critical patent/FR2351930A1/en
Application granted granted Critical
Publication of FR2351930B1 publication Critical patent/FR2351930B1/fr
Granted legal-status Critical Current

Links

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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • B01J23/46—Ruthenium, rhodium, osmium or iridium
    • B01J23/464—Rhodium
    • 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
    • C07C4/18—Catalytic processes
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2521/00—Catalysts comprising the elements, oxides or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium or hafnium
    • C07C2521/02—Boron or aluminium; Oxides or hydroxides thereof
    • C07C2521/04—Alumina
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2523/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
    • C07C2523/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals
    • C07C2523/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals of the platinum group metals
    • C07C2523/42—Platinum
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2523/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
    • C07C2523/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals
    • C07C2523/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals of the platinum group metals
    • C07C2523/44—Palladium
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2523/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
    • C07C2523/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals
    • C07C2523/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals of the platinum group metals
    • C07C2523/46—Ruthenium, rhodium, osmium or iridium
    • 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
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Landscapes

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

Abstract

Hydrodealkylation of alkyl aromatic hydrocarbons by reaction with hydrogen in the absence of steam is described. The reaction is effected at 450-650 degrees C at 1-30 bars pressure using a H/hydrocarbon molar ratio of 1-10 with a space rate of 1-10 vols. of liq. charge/vol. catalyst/hr. The reaction is in the presence of a catalyst comprising rhodium and >=1 of Pt and Pd on an active alumina support having a 150-300 m2/gm specific surface and a 0.5-0.8 cm3/gm. total porous vol. The support consists of active alumina agglomerates obtd. by dehydration of alumina hydrate in a current of warm gas. An alternative support has a specific surface of 100-170 m2/gm., the above porous vol. and is obtd. by autoclave treatment in aq. neutral or acid medium. The process is esp. applied to toluene and xylenes. The process has the advantage of using lower temp. and pressures than previous rhodium catalyst processes. The catalyst has greater stability and gives a greater selectivity and is also cheaper.
FR7615236A 1976-05-20 1976-05-20 Hydrodealkylation of alkyl aromatic hydrocarbon(s) - using rhodium-contg. catalyst with palladium and/or platinum Granted FR2351930A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7615236A FR2351930A1 (en) 1976-05-20 1976-05-20 Hydrodealkylation of alkyl aromatic hydrocarbon(s) - using rhodium-contg. catalyst with palladium and/or platinum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7615236A FR2351930A1 (en) 1976-05-20 1976-05-20 Hydrodealkylation of alkyl aromatic hydrocarbon(s) - using rhodium-contg. catalyst with palladium and/or platinum

Publications (2)

Publication Number Publication Date
FR2351930A1 true FR2351930A1 (en) 1977-12-16
FR2351930B1 FR2351930B1 (en) 1979-05-11

Family

ID=9173417

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7615236A Granted FR2351930A1 (en) 1976-05-20 1976-05-20 Hydrodealkylation of alkyl aromatic hydrocarbon(s) - using rhodium-contg. catalyst with palladium and/or platinum

Country Status (1)

Country Link
FR (1) FR2351930A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5457255A (en) * 1990-10-12 1995-10-10 Mitsubishi Oil Co., Ltd. Catalysts for hydrogenolytic dealkylation and use thereof
FR2768724A1 (en) * 1997-09-23 1999-03-26 Inst Francais Du Petrole A new process for the production of para-xylene

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2254542A1 (en) * 1973-12-13 1975-07-11 Inst Francais Du Petrole

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2254542A1 (en) * 1973-12-13 1975-07-11 Inst Francais Du Petrole

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5457255A (en) * 1990-10-12 1995-10-10 Mitsubishi Oil Co., Ltd. Catalysts for hydrogenolytic dealkylation and use thereof
FR2768724A1 (en) * 1997-09-23 1999-03-26 Inst Francais Du Petrole A new process for the production of para-xylene

Also Published As

Publication number Publication date
FR2351930B1 (en) 1979-05-11

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ST Notification of lapse