GB1499699A - Process for the preparation of 1,5-and 1,8-diaminonaphthalene - Google Patents

Process for the preparation of 1,5-and 1,8-diaminonaphthalene

Info

Publication number
GB1499699A
GB1499699A GB2164476A GB2164476A GB1499699A GB 1499699 A GB1499699 A GB 1499699A GB 2164476 A GB2164476 A GB 2164476A GB 2164476 A GB2164476 A GB 2164476A GB 1499699 A GB1499699 A GB 1499699A
Authority
GB
United Kingdom
Prior art keywords
aqueous
compounds
water
catalytic hydrogenation
solvent
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
GB2164476A
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.)
Bayer AG
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Publication of GB1499699A publication Critical patent/GB1499699A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
    • C07C201/06—Preparation of nitro compounds
    • C07C201/16—Separation; Purification; Stabilisation; Use of additives
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
    • C07C205/06—Compounds containing nitro groups bound to a carbon skeleton having nitro groups bound to carbon atoms of six-membered aromatic rings
    • 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

Landscapes

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

Abstract

These known substances are obtained by catalytic hydrogenation of the corresponding dinitronaphthalenes. While it was previously necessary to employ pure dinitro compounds because the technical-grade crude products are only hydrogenated slowly and incompletely, it is now possible to prepare them starting from crude dinitro compounds. These compounds are first treated with water or an aqueous solution with an alkaline reaction, if appropriate with addition of a solvent which is not miscible with water, such as benzene, naphthalene or halohydrocarbons, at a temperature between 0 DEG C and the boiling point of the mixture, the aqueous, or aqueous/organic, solvent phase is then separated off, and the product is subjected to conventional catalytic hydrogenation.
GB2164476A 1975-05-27 1976-05-25 Process for the preparation of 1,5-and 1,8-diaminonaphthalene Expired GB1499699A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752523351 DE2523351C2 (en) 1975-05-27 1975-05-27 Process for the preparation of 1,5- and 1,8-diaminonaphthalene

Publications (1)

Publication Number Publication Date
GB1499699A true GB1499699A (en) 1978-02-01

Family

ID=5947485

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2164476A Expired GB1499699A (en) 1975-05-27 1976-05-25 Process for the preparation of 1,5-and 1,8-diaminonaphthalene

Country Status (7)

Country Link
BE (1) BE842223A (en)
CH (1) CH622240A5 (en)
DE (1) DE2523351C2 (en)
FR (1) FR2312487A1 (en)
GB (1) GB1499699A (en)
IT (1) IT1061311B (en)
SE (1) SE7605928L (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1342713A1 (en) * 2002-03-05 2003-09-10 Bayer Aktiengesellschaft Method for producing a dinitronaphthalene-isomer mixture having an increased 1,5-dinitronaphthalene proportion
US6706924B2 (en) 2000-12-22 2004-03-16 Bayer Aktiengesellschaft Process for the production of 1,5-naphthalenediamine
US7057071B2 (en) 2002-06-03 2006-06-06 Bayer Materialscience Ag Process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1-5-naphthalenediamine and 1,5-naphthalene diisocyanate
CN1687011B (en) * 2005-03-31 2010-05-05 聂天明 Method for refining amino naphthalenes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4026944A (en) * 1974-08-10 1977-05-31 Bayer Aktiengesellschaft Process for manufacturing diaminonaphthalene

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6706924B2 (en) 2000-12-22 2004-03-16 Bayer Aktiengesellschaft Process for the production of 1,5-naphthalenediamine
EP1342713A1 (en) * 2002-03-05 2003-09-10 Bayer Aktiengesellschaft Method for producing a dinitronaphthalene-isomer mixture having an increased 1,5-dinitronaphthalene proportion
US6737554B2 (en) 2002-03-05 2004-05-18 Bayer Aktiengesellschaft Process for the production of a dinitronaphthalene isomer mixture with a high proportion of 1,5-dinitronaphthalene
US7057071B2 (en) 2002-06-03 2006-06-06 Bayer Materialscience Ag Process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1-5-naphthalenediamine and 1,5-naphthalene diisocyanate
US7202378B2 (en) 2002-06-03 2007-04-10 Bayer Materialscience Ag Process for producing 5-nitro-3,4-dihydro-1(H)-naphthalinone, 1,5-naphthalenediamine and 1,5-naphthalene diisocyanate
US7202384B2 (en) 2002-06-03 2007-04-10 Bayer Materialscience Aktiengesellschaft Process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1,5-naphthalenediamine and 1,5-naphthalene diisocyanate
CN1687011B (en) * 2005-03-31 2010-05-05 聂天明 Method for refining amino naphthalenes

Also Published As

Publication number Publication date
BE842223A (en) 1976-11-26
SE7605928L (en) 1976-11-28
DE2523351C2 (en) 1982-12-02
DE2523351A1 (en) 1976-12-09
FR2312487A1 (en) 1976-12-24
FR2312487B1 (en) 1980-11-07
IT1061311B (en) 1983-02-28
CH622240A5 (en) 1981-03-31

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Legal Events

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PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee