GB389098A - Process of separating 1-naphthylamine-8-sulfonic acid from its isomers - Google Patents
Process of separating 1-naphthylamine-8-sulfonic acid from its isomersInfo
- Publication number
- GB389098A GB389098A GB2523231A GB2523231A GB389098A GB 389098 A GB389098 A GB 389098A GB 2523231 A GB2523231 A GB 2523231A GB 2523231 A GB2523231 A GB 2523231A GB 389098 A GB389098 A GB 389098A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- acids
- naphthylamine
- isomers
- ammonium
- 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
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1-naphthylamine-8-sulphonic acid is separated from the mixture obtained by nitrating and reducing a -naphthalene-mono-sulphonic acid, by precipitating as free acid by acidifying a neutral or alkaline solution containing the ammonium, alkali metal, or alkaline earth salts of the mixed acids. The precipitation is effected with an agent of acid character stronger than the 1 : 8 but weaker than the 1 : 5 isomers, by means of a buffer agent capable of maintaining the hydrogen ion concentration of pH = 3,7 -- 5,3 in conjunction with a stronger acid. As buffer agents, sodium bisulphite, formate, acetate and chloracetate and acid potassium phthalate are specified. According to examples, the ammonium, alkali metal and magnesium salts of the mixed acids in solution are treated with sodium bisulphite in conjunction with hydrochloric or sulphuric acids, whereby the 1 : 8 isomer is precipitated, other acids remaining in solution.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2523231A GB389098A (en) | 1931-09-08 | 1931-09-08 | Process of separating 1-naphthylamine-8-sulfonic acid from its isomers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2523231A GB389098A (en) | 1931-09-08 | 1931-09-08 | Process of separating 1-naphthylamine-8-sulfonic acid from its isomers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB389098A true GB389098A (en) | 1933-03-08 |
Family
ID=10224339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2523231A Expired GB389098A (en) | 1931-09-08 | 1931-09-08 | Process of separating 1-naphthylamine-8-sulfonic acid from its isomers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB389098A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3103504A (en) * | 1963-09-10 | Dichlorotriazines stabilized with aryl- |
-
1931
- 1931-09-08 GB GB2523231A patent/GB389098A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3103504A (en) * | 1963-09-10 | Dichlorotriazines stabilized with aryl- |
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