FR2398725A1 - Perfectionnements a la preparation d'acide 2-amino-1-naphtalenesulfonique - Google Patents

Perfectionnements a la preparation d'acide 2-amino-1-naphtalenesulfonique

Info

Publication number
FR2398725A1
FR2398725A1 FR7822223A FR7822223A FR2398725A1 FR 2398725 A1 FR2398725 A1 FR 2398725A1 FR 7822223 A FR7822223 A FR 7822223A FR 7822223 A FR7822223 A FR 7822223A FR 2398725 A1 FR2398725 A1 FR 2398725A1
Authority
FR
France
Prior art keywords
amino
preparation
acid
suspension
naphtalenesulphonic acid
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.)
Pending
Application number
FR7822223A
Other languages
English (en)
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.)
Wyeth Holdings LLC
Original Assignee
American Cyanamid Co
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 American Cyanamid Co filed Critical American Cyanamid Co
Publication of FR2398725A1 publication Critical patent/FR2398725A1/fr
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C303/00—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
    • C07C303/32—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of salts of sulfonic acids

Landscapes

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

Abstract

Pour cette préparation, on fait appel à un procédé dans lequel on fait reagir une solution aqueuse d'un sel d'acide 2-hydroxy-1-naphtalènesulfonique avec de l'ammoniac et de l'anhydride sulfureux, acidifie le mélange réactionnel en obtenant une suspension que l'on refroidit et recueille l'acide 2amino-1-naphtalènesulfonique (acide de Tobias) qu'elle contient. Selon l'invention, l'acidification est effectuée à un pH de 1,8 à 2,5 en maintenant la température de la suspension à 2080 degrés C. L'acide de Tobias ainsi obtenu ne contient qu'une quantité minimale admissible, comme impureté, de 2-aminonaphtalène carcinogène.
FR7822223A 1977-07-29 1978-07-27 Perfectionnements a la preparation d'acide 2-amino-1-naphtalenesulfonique Pending FR2398725A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82027777A 1977-07-29 1977-07-29

Publications (1)

Publication Number Publication Date
FR2398725A1 true FR2398725A1 (fr) 1979-02-23

Family

ID=25230367

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7822223A Pending FR2398725A1 (fr) 1977-07-29 1978-07-27 Perfectionnements a la preparation d'acide 2-amino-1-naphtalenesulfonique

Country Status (4)

Country Link
JP (1) JPS5427555A (fr)
DE (1) DE2831994A1 (fr)
FR (1) FR2398725A1 (fr)
GB (1) GB2001641B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2398724A1 (fr) * 1977-07-29 1979-02-23 American Cyanamid Co Perfectionnements a la preparation d'acide 2-amino-1-naphtalenesulfonique ou acide de tobias
FR2398723A1 (fr) * 1977-07-29 1979-02-23 American Cyanamid Co Procede de preparation d'acide 2-amino-1-naphtalenesulfonique ou acide de tobias
FR2398722A1 (fr) * 1977-07-29 1979-02-23 American Cyanamid Co Perfectionnements a la preparation de solutions aqueuses de sels alcalins de l'acide 2-hydroxy-1-naphtalenesulfonique
FR2398726A1 (fr) * 1977-07-29 1979-02-23 American Cyanamid Co Procede de preparation d'acide 2-amino-1-naphtalenesulfonique
FR2398721A1 (fr) * 1977-07-29 1979-02-23 American Cyanamid Co Procede de preparation de solutions aqueuses de sels alcalins de l'acide 2-hydroxy-1-naphtalenesulfonique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0031299B1 (fr) * 1979-12-20 1985-02-13 Ciba-Geigy Ag Procédé pour la préparation d'acide 2-amino-1-naphtalène sulfonique
CN101962294A (zh) * 2010-07-15 2011-02-02 上海大学 一种w型中低温ntc-ptc双重复合热敏电阻材料及其制备方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB436464A (en) * 1933-04-11 1935-10-11 Du Pont Improvements in or relating to the manufacture of naphthylaminesulphonic acids
DE2610545A1 (de) * 1975-03-14 1976-09-30 American Cyanamid Co Verfahren zur herstellung von tobias-saeure
FR2398724A1 (fr) * 1977-07-29 1979-02-23 American Cyanamid Co Perfectionnements a la preparation d'acide 2-amino-1-naphtalenesulfonique ou acide de tobias
FR2398723A1 (fr) * 1977-07-29 1979-02-23 American Cyanamid Co Procede de preparation d'acide 2-amino-1-naphtalenesulfonique ou acide de tobias
FR2398726A1 (fr) * 1977-07-29 1979-02-23 American Cyanamid Co Procede de preparation d'acide 2-amino-1-naphtalenesulfonique
FR2398727A1 (fr) * 1977-07-29 1979-02-23 American Cyanamid Co Procede de preparation d'acide de tobias ou acide 2-amino-1-naphtalenesulfonique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB436464A (en) * 1933-04-11 1935-10-11 Du Pont Improvements in or relating to the manufacture of naphthylaminesulphonic acids
DE2610545A1 (de) * 1975-03-14 1976-09-30 American Cyanamid Co Verfahren zur herstellung von tobias-saeure
FR2398724A1 (fr) * 1977-07-29 1979-02-23 American Cyanamid Co Perfectionnements a la preparation d'acide 2-amino-1-naphtalenesulfonique ou acide de tobias
FR2398723A1 (fr) * 1977-07-29 1979-02-23 American Cyanamid Co Procede de preparation d'acide 2-amino-1-naphtalenesulfonique ou acide de tobias
FR2398726A1 (fr) * 1977-07-29 1979-02-23 American Cyanamid Co Procede de preparation d'acide 2-amino-1-naphtalenesulfonique
FR2398727A1 (fr) * 1977-07-29 1979-02-23 American Cyanamid Co Procede de preparation d'acide de tobias ou acide 2-amino-1-naphtalenesulfonique

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2398724A1 (fr) * 1977-07-29 1979-02-23 American Cyanamid Co Perfectionnements a la preparation d'acide 2-amino-1-naphtalenesulfonique ou acide de tobias
FR2398723A1 (fr) * 1977-07-29 1979-02-23 American Cyanamid Co Procede de preparation d'acide 2-amino-1-naphtalenesulfonique ou acide de tobias
FR2398722A1 (fr) * 1977-07-29 1979-02-23 American Cyanamid Co Perfectionnements a la preparation de solutions aqueuses de sels alcalins de l'acide 2-hydroxy-1-naphtalenesulfonique
FR2398726A1 (fr) * 1977-07-29 1979-02-23 American Cyanamid Co Procede de preparation d'acide 2-amino-1-naphtalenesulfonique
FR2398721A1 (fr) * 1977-07-29 1979-02-23 American Cyanamid Co Procede de preparation de solutions aqueuses de sels alcalins de l'acide 2-hydroxy-1-naphtalenesulfonique

Also Published As

Publication number Publication date
GB2001641B (en) 1982-03-10
DE2831994A1 (de) 1979-02-08
GB2001641A (en) 1979-02-07
JPS5427555A (en) 1979-03-01

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