GB1505112A - Catalytic hydrodealkylation of alkylaromatic hydrocarbons - Google Patents

Catalytic hydrodealkylation of alkylaromatic hydrocarbons

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Publication number
GB1505112A
GB1505112A GB8093/75A GB809375A GB1505112A GB 1505112 A GB1505112 A GB 1505112A GB 8093/75 A GB8093/75 A GB 8093/75A GB 809375 A GB809375 A GB 809375A GB 1505112 A GB1505112 A GB 1505112A
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GB
United Kingdom
Prior art keywords
range
catalyst
concentration
weight
hydrocarbon
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.)
Expired
Application number
GB8093/75A
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
Priority claimed from FR7407340A external-priority patent/FR2262654A1/en
Priority claimed from FR7415166A external-priority patent/FR2268772A1/en
Application filed by IFP Energies Nouvelles IFPEN filed Critical IFP Energies Nouvelles IFPEN
Publication of GB1505112A publication Critical patent/GB1505112A/en
Expired legal-status Critical Current

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    • 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
    • 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
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Abstract

1505112 Hydrodealkylating alkylaromatic hydrocarbons INST FRANCAIS DU PETROLE 26 Feb 1975 [1 March 1974 29 April 1974] 8093/75 Heading C5E [Also in Division B1] A process for the catalytic hydrodealkylation of an alkylaromatic hydrocarbon comprises contacting the hydrocarbon, substantially sulphur-free, at a temperature in the range 400‹ to 650‹ C., in the presence of hydrogen, under a pressure in the range 1 to 40 kg./cm.<SP>2</SP>, with a spatial velocity in the range 1 to 10 and a ratio of the hydrogen to the hydrocarbon, expressed as moles per mole at the outlet of the reactor, in the range 1 to 10, and a catalyst which comprises: (a) a carrier; (e.g. alumina) (b) at least one element selected from cobalt, ruthenium, rhodium, palladium, osmium, iridium and platinum, at a concentration in the range 0À05 to 20% by weight of catalyst when the selected element is cobalt, and at a concentration in the range 0À05 to 5% by weight of the catalyst when the selected element is chosen from ruthenium, rhodium, palladium, osmium, iridium, and platinum; and (c) at least one additional element selected from zinc, cadmium, gallium, indium, thallium, manganese, copper, silver, gold, yttrium, titanium, niobium and tantalum, said element being at a concentration in the range 0À05 to 5% by weight of the catalyst; the catalyst being alkali-metal-free.
GB8093/75A 1974-03-01 1975-02-26 Catalytic hydrodealkylation of alkylaromatic hydrocarbons Expired GB1505112A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7407340A FR2262654A1 (en) 1974-03-01 1974-03-01 Hydrodealkylation of alkylaromatics under mild conditions - using catalysts with two metal components
FR7415166A FR2268772A1 (en) 1974-04-29 1974-04-29 Hydrodealkylation of alkylaromatics under mild conditions - using catalysts with two metal components

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GB1505112A true GB1505112A (en) 1978-03-22

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GB8093/75A Expired GB1505112A (en) 1974-03-01 1975-02-26 Catalytic hydrodealkylation of alkylaromatic hydrocarbons

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GB (1) GB1505112A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008135581A1 (en) * 2007-05-08 2008-11-13 Basf Se Iridium catalysts for converting hydrocarbons in the presence of water vapour and especially for the steam dealkylation of alkyl-substituted aromatic hydrocarbons

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008135581A1 (en) * 2007-05-08 2008-11-13 Basf Se Iridium catalysts for converting hydrocarbons in the presence of water vapour and especially for the steam dealkylation of alkyl-substituted aromatic hydrocarbons

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PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee