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 ACIDInfo
- 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- Withdrawn
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2398723A1 (en) * | 1977-07-29 | 1979-02-23 | American Cyanamid Co | PROCESS FOR PREPARING 2-AMINO-1-NAPHTALENESULPHONIC ACID OR TOBIAS 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 |
FR2398727A1 (en) * | 1977-07-29 | 1979-02-23 | American Cyanamid Co | PROCESS FOR PREPARING TOBIAS ACID OR 2-AMINO-1-NAPHTALENESULPHONIC ACID |
Families Citing this family (2)
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)
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 |
FR2398725A1 (en) * | 1977-07-29 | 1979-02-23 | American Cyanamid Co | IMPROVEMENTS IN THE PREPARATION OF 2-AMINO-1-NAPHTALENESULPHONIC ACID |
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 |
-
1978
- 1978-07-20 DE DE19782831956 patent/DE2831956A1/en not_active Withdrawn
- 1978-07-24 GB GB7830889A patent/GB2001642B/en not_active Expired
- 1978-07-27 FR FR7822225A patent/FR2398722A1/en not_active Withdrawn
- 1978-07-29 JP JP9208278A patent/JPS5427552A/en active Pending
Patent Citations (6)
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 |
FR2398725A1 (en) * | 1977-07-29 | 1979-02-23 | American Cyanamid Co | IMPROVEMENTS IN THE PREPARATION OF 2-AMINO-1-NAPHTALENESULPHONIC ACID |
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 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2398723A1 (en) * | 1977-07-29 | 1979-02-23 | American Cyanamid Co | PROCESS FOR PREPARING 2-AMINO-1-NAPHTALENESULPHONIC ACID OR TOBIAS 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 |
FR2398727A1 (en) * | 1977-07-29 | 1979-02-23 | American Cyanamid Co | PROCESS FOR PREPARING TOBIAS ACID OR 2-AMINO-1-NAPHTALENESULPHONIC ACID |
Also Published As
Publication number | Publication date |
---|---|
JPS5427552A (en) | 1979-03-01 |
GB2001642A (en) | 1979-02-07 |
GB2001642B (en) | 1982-02-03 |
DE2831956A1 (en) | 1979-02-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |