FR2398722A1 - IMPROVEMENTS FOR THE PREPARATION OF AQUEOUS SOLUTIONS OF ALKALINE SALTS OF 2-HYDROXY-1-NAPHTALENESULPHONIC ACID - Google Patents

IMPROVEMENTS FOR THE PREPARATION OF AQUEOUS SOLUTIONS OF ALKALINE SALTS OF 2-HYDROXY-1-NAPHTALENESULPHONIC ACID

Info

Publication number
FR2398722A1
FR2398722A1 FR7822225A FR7822225A FR2398722A1 FR 2398722 A1 FR2398722 A1 FR 2398722A1 FR 7822225 A FR7822225 A FR 7822225A FR 7822225 A FR7822225 A FR 7822225A FR 2398722 A1 FR2398722 A1 FR 2398722A1
Authority
FR
France
Prior art keywords
hydroxy
preparation
c1so3
aqueous solutions
alkaline salts
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.)
Withdrawn
Application number
FR7822225A
Other languages
French (fr)
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 FR2398722A1 publication Critical patent/FR2398722A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof

Landscapes

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

Abstract

Pour cette préparation, il est fait appel à la sulfonation du 2-hydroxy-naphtalène BN par l'acide chlorosulfonique (C1SO3 H) dans un solvant organique non miscible à l'eau MNB suivie d'alcalisation de l'acide sulfonique obtenu. Selon l'invention, BN et C1SO3 H sont introduits en continu à 0-50 degrés C dans un réacteur I en des proportions telles que le rapport molaire C1SO3 H/BN soit de 0,95 à 1,15 et le mélange réactionnel est maintenu dans le réacteur I pendant 1 à 120 minutes avant d'être alcalinisé en II. Ces mesures améliorent le rendement en BN, la productivité du procédé et la pureté du produit obtenu.For this preparation, use is made of the sulfonation of 2-hydroxy-naphthalene BN with chlorosulfonic acid (C1SO3 H) in an organic solvent immiscible with water MNB followed by alkalization of the sulfonic acid obtained. According to the invention, BN and C1SO3 H are introduced continuously at 0-50 degrees C into a reactor I in proportions such that the molar ratio C1SO3 H / BN is from 0.95 to 1.15 and the reaction mixture is maintained in reactor I for 1 to 120 minutes before being basified in II. These measures improve the yield of BN, the productivity of the process and the purity of the product obtained.

FR7822225A 1977-07-29 1978-07-27 IMPROVEMENTS FOR THE PREPARATION OF AQUEOUS SOLUTIONS OF ALKALINE SALTS OF 2-HYDROXY-1-NAPHTALENESULPHONIC ACID Withdrawn FR2398722A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82048577A 1977-07-29 1977-07-29

Publications (1)

Publication Number Publication Date
FR2398722A1 true FR2398722A1 (en) 1979-02-23

Family

ID=25230911

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7822225A Withdrawn FR2398722A1 (en) 1977-07-29 1978-07-27 IMPROVEMENTS FOR THE PREPARATION OF AQUEOUS SOLUTIONS OF ALKALINE SALTS OF 2-HYDROXY-1-NAPHTALENESULPHONIC ACID

Country Status (4)

Country Link
JP (1) JPS5427552A (en)
DE (1) DE2831956A1 (en)
FR (1) FR2398722A1 (en)
GB (1) GB2001642B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2398727A1 (en) * 1977-07-29 1979-02-23 American Cyanamid Co PROCESS FOR PREPARING TOBIAS ACID OR 2-AMINO-1-NAPHTALENESULPHONIC ACID
FR2398724A1 (en) * 1977-07-29 1979-02-23 American Cyanamid Co IMPROVEMENTS IN THE PREPARATION OF 2-AMINO-1-NAPHTALENESULPHONIC ACID OR TOBIAS ACID
FR2398723A1 (en) * 1977-07-29 1979-02-23 American Cyanamid Co PROCESS FOR PREPARING 2-AMINO-1-NAPHTALENESULPHONIC ACID OR TOBIAS ACID

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3070185D1 (en) * 1979-12-20 1985-03-28 Ciba Geigy Ag Process for the preparation of 2-amino-1-naphthalene sulfonic acid
CN109810028A (en) * 2019-04-03 2019-05-28 天津市科德化工有限公司 Apparatus system for tobias acid waste liquid purification tobias acid

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1182010A (en) * 1956-09-05 1959-06-22 Gen Aniline & Film Corp Process for preparing beta-naphthol-sulfonic acid
DE2330716A1 (en) * 1973-01-12 1974-08-01 Bitterfeld Chemie Equipment for continuous liquid phase reactions - separate compartments in horizontal reactor with axial stirrer shaft carrying required agitators
FR2398724A1 (en) * 1977-07-29 1979-02-23 American Cyanamid Co IMPROVEMENTS IN THE PREPARATION OF 2-AMINO-1-NAPHTALENESULPHONIC ACID OR TOBIAS ACID
FR2398723A1 (en) * 1977-07-29 1979-02-23 American Cyanamid Co PROCESS FOR PREPARING 2-AMINO-1-NAPHTALENESULPHONIC ACID OR TOBIAS ACID
FR2398727A1 (en) * 1977-07-29 1979-02-23 American Cyanamid Co PROCESS FOR PREPARING TOBIAS ACID OR 2-AMINO-1-NAPHTALENESULPHONIC ACID
FR2398725A1 (en) * 1977-07-29 1979-02-23 American Cyanamid Co IMPROVEMENTS IN THE PREPARATION OF 2-AMINO-1-NAPHTALENESULPHONIC ACID

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1182010A (en) * 1956-09-05 1959-06-22 Gen Aniline & Film Corp Process for preparing beta-naphthol-sulfonic acid
DE2330716A1 (en) * 1973-01-12 1974-08-01 Bitterfeld Chemie Equipment for continuous liquid phase reactions - separate compartments in horizontal reactor with axial stirrer shaft carrying required agitators
FR2398724A1 (en) * 1977-07-29 1979-02-23 American Cyanamid Co IMPROVEMENTS IN THE PREPARATION OF 2-AMINO-1-NAPHTALENESULPHONIC ACID OR TOBIAS ACID
FR2398723A1 (en) * 1977-07-29 1979-02-23 American Cyanamid Co PROCESS FOR PREPARING 2-AMINO-1-NAPHTALENESULPHONIC ACID OR TOBIAS ACID
FR2398727A1 (en) * 1977-07-29 1979-02-23 American Cyanamid Co PROCESS FOR PREPARING TOBIAS ACID OR 2-AMINO-1-NAPHTALENESULPHONIC ACID
FR2398725A1 (en) * 1977-07-29 1979-02-23 American Cyanamid Co IMPROVEMENTS IN THE PREPARATION OF 2-AMINO-1-NAPHTALENESULPHONIC ACID

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2398727A1 (en) * 1977-07-29 1979-02-23 American Cyanamid Co PROCESS FOR PREPARING TOBIAS ACID OR 2-AMINO-1-NAPHTALENESULPHONIC ACID
FR2398724A1 (en) * 1977-07-29 1979-02-23 American Cyanamid Co IMPROVEMENTS IN THE PREPARATION OF 2-AMINO-1-NAPHTALENESULPHONIC ACID OR TOBIAS ACID
FR2398723A1 (en) * 1977-07-29 1979-02-23 American Cyanamid Co PROCESS FOR PREPARING 2-AMINO-1-NAPHTALENESULPHONIC ACID OR TOBIAS ACID

Also Published As

Publication number Publication date
DE2831956A1 (en) 1979-02-15
GB2001642A (en) 1979-02-07
GB2001642B (en) 1982-02-03
JPS5427552A (en) 1979-03-01

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