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GB1493657A - Production of hydroquinone - Google Patents

Production of hydroquinone

Info

Publication number
GB1493657A
GB1493657A GB4043875A GB4043875A GB1493657A GB 1493657 A GB1493657 A GB 1493657A GB 4043875 A GB4043875 A GB 4043875A GB 4043875 A GB4043875 A GB 4043875A GB 1493657 A GB1493657 A GB 1493657A
Authority
GB
United Kingdom
Prior art keywords
catalyst
platinum
hydroquinone
reaction medium
hydrogen
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
GB4043875A
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.)
Beazer East Inc
Original Assignee
Koppers Co Inc
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 US05/542,086 external-priority patent/US3935283A/en
Application filed by Koppers Co Inc filed Critical Koppers Co Inc
Publication of GB1493657A publication Critical patent/GB1493657A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
    • C07C209/30—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds
    • C07C209/32—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups
    • C07C209/36—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups by reduction of nitro groups bound to carbon atoms of six-membered aromatic rings in presence of hydrogen-containing gases and a catalyst
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C1/00—Ammonia; Compounds thereof
    • C01C1/24—Sulfates of ammonium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1493657 Production of hydroquinone KOPPERS CO Inc 17 Nov 1975 [17 Jan 1975] 40438/75 Heading C2C A process for the preparation of hydroquinone comprises contacting nitrobenzene in an aqueous acidic medium with hydrogen at elevated pressure and at a temperature of from 130‹ C. to 160‹ C. in the presence of an acid-resistant reducing catalyst until hydrogen absorption ceases, removing any unreduced nitrobenzene from the reaction medium, removing the catalyst from the reaction medium, and thereafter maintaining the reaction medium containing the hydrogen reduction product at a temperature of from 200‹ to 300‹ C. for a sufficient time to hydrolyse the reduction product to hydroquinone. The acidic ingredient of the aqueous acidic medium is preferably H 3 PO 4 , H 2 SO 4 or (NH 4 ) 2 SO 4 . The acid resistant catalyst is suitably a platinum catalyst, a platinum on carbon catalyst, a platinum on alumina catalyst, a platinum sulphide on carbon catalyst or a molybdenum sulphide catalyst.
GB4043875A 1975-01-17 1975-11-17 Production of hydroquinone Expired GB1493657A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/542,086 US3935283A (en) 1972-06-29 1975-01-17 Production of hydroquinone

Publications (1)

Publication Number Publication Date
GB1493657A true GB1493657A (en) 1977-11-30

Family

ID=24162279

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4043875A Expired GB1493657A (en) 1975-01-17 1975-11-17 Production of hydroquinone

Country Status (8)

Country Link
JP (1) JPS5811413B2 (en)
BE (1) BE833961A (en)
CA (1) CA1040659A (en)
DE (1) DE2601146C3 (en)
FR (1) FR2297827A1 (en)
GB (1) GB1493657A (en)
IT (1) IT1060533B (en)
NL (1) NL7511280A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0015876A1 (en) * 1979-03-01 1980-09-17 Elprochine Ag Process for the production of hydroquinone

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5232207B2 (en) * 1971-09-10 1977-08-19

Also Published As

Publication number Publication date
IT1060533B (en) 1982-08-20
JPS5191217A (en) 1976-08-10
JPS5811413B2 (en) 1983-03-02
FR2297827B1 (en) 1979-01-19
FR2297827A1 (en) 1976-08-13
DE2601146C3 (en) 1980-10-09
DE2601146A1 (en) 1976-07-22
NL7511280A (en) 1976-07-20
BE833961A (en) 1976-01-16
DE2601146B2 (en) 1980-02-14
CA1040659A (en) 1978-10-17

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee